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Patel A, Mallik C, Chandra N, Patra PK, Steinbacher M. Revisiting regional and seasonal variations in decadal carbon monoxide variability: Global reversal of growth rate. THE SCIENCE OF THE TOTAL ENVIRONMENT 2024; 909:168476. [PMID: 37984655 DOI: 10.1016/j.scitotenv.2023.168476] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/30/2023] [Revised: 10/09/2023] [Accepted: 11/08/2023] [Indexed: 11/22/2023]
Abstract
Carbon monoxide (CO) is one of the important trace gases in the atmosphere capturing the evolution of chemical properties of the troposphere. Here we analyze the growth rates of CO during the period of 1991-2020 using in situ measurements from the World Meteorological Organization's (WMO) Global Atmospheric Watch (GAW) program. The analysis of trends has been done on different spatial and temporal scales. Our analysis supports the decline in the overall CO mixing ratios over the globe but inter-decadal and regional trend analysis has shown heterogeneous changes in the given period of study. On average, there has been a decrease of -16.22 ± 1.92 ppb and -4.5 ± 0.64 ppb observed at the sites in the northern hemisphere (NH) and southern hemisphere (SH), respectively. This decline occurred at rates of -0.80 ± 0.12 ppb yr-1 in the NH and - 0.12 ± 0.03 ppb yr-1 in the SH. Bifurcating the annual trends for seasonal analysis reveals the impact of emissions, chemistry and atmospheric transport on CO variation over different regional clusters of stations. Seasonal trend analysis provides further evidence regarding heterogeneous patterns in the South-East Asia region. Our study highlights a slowdown in CO decline during the 2011-2020 decade when compared to the rate of decrease observed in 2001-2010. This is inferred from the variability and much slower decline of CO emissions across different regions, contributing to a weakening in CO trends.
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Affiliation(s)
- Ankit Patel
- Department of Atmospheric Science, Central University of Rajasthan, Ajmer 305801, India
| | - Chinmay Mallik
- Department of Atmospheric Science, Central University of Rajasthan, Ajmer 305801, India.
| | - Naveen Chandra
- Research Institute for Global Change, JAMSTEC, Yokohama 2360001, Japan
| | - Prabir K Patra
- Research Institute for Global Change, JAMSTEC, Yokohama 2360001, Japan; Research Institute for Humanity and Nature, Kyoto, Japan
| | - Martin Steinbacher
- Empa, Swiss Federal Laboratories for Materials Science and Technology, CH-8600 Duebendorf, Switzerland
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Svv DR, Al-Rashidi A, Sabarathinam C, Alsabti B, Al-Wazzan Y, Kumar US. Temporal and spatial shifts in the chemical composition of urban coastal rainwaters of Kuwait: The role of air mass trajectory and meteorological variables. THE SCIENCE OF THE TOTAL ENVIRONMENT 2023; 899:165649. [PMID: 37478926 DOI: 10.1016/j.scitotenv.2023.165649] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/10/2023] [Revised: 07/17/2023] [Accepted: 07/17/2023] [Indexed: 07/23/2023]
Abstract
The rainwater chemistry encompasses the signatures of geogenic and anthropogenic processes along the regional air mass movement apart from the local sources. The predominance of dust events and anthropogenic emissions in arid regions facilitate new particle formation. Further, rain events of different seasons depict moisture sources from diverse regions reflecting variation in the regional geochemistry with respect to seasons. Hence, to characterize the geochemical composition of rainwater, the study has focused on an integrated approach by considering regional transport, meteorological components and possible local sources. A total of 74 rainwater samples were collected from 27 rain events in 2018, 2019, and 2022, representing urban coastal areas of Kuwait predominantly of Ca-SO4-HCO3 type. The average pH and electrical conductivity of the rainwater were 7.18 and 140 μS/cm, respectively. The sea salt fractions calculated relative to Kuwait seawater ranged from 25.6 to >100 %, with higher values attributed to anthropogenic sources. Sea salt fraction, ion ratios, principal component analysis and factor scores revealed the terrestrial and anthropogenic sources apart from marine contributions. In addition, new particle formation and aerosols contributed to the rainwater chemistry involving SOx, NOx, and photochemical reactions during higher relative humidity and lesser wind speed. The HYSPLIT reflected that the moisture sources were largely from western regions of the study area, and those of December and January events had long-distance travel across the Azores high originating from northeast America. The trajectories of the November events are observed to originate from the Caspian/Black Sea region in the northeastern part of Kuwait with a relatively shorter distance of travel. The rainfall samples had higher ionic concentrations, and saturated with aragonite and calcite minerals in a few locations specifically after the dust events, while the subsequent rain events were less polluted.
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Affiliation(s)
- Dhanu Radha Svv
- Water Research Center, Kuwait Institute for Scientific Research, Shuwaikh, Kuwait.
| | - Amjad Al-Rashidi
- Water Research Center, Kuwait Institute for Scientific Research, Shuwaikh, Kuwait
| | | | - Bedour Alsabti
- Water Research Center, Kuwait Institute for Scientific Research, Shuwaikh, Kuwait
| | - Yousef Al-Wazzan
- Water Research Center, Kuwait Institute for Scientific Research, Shuwaikh, Kuwait
| | - Umayadoss Saravana Kumar
- Isotope Hydrology Section, Division of Physical and Chemical Sciences, Department of Nuclear Sciences and Applications, IAEA, Vienna, Austria
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Armenta Butt S, Price SD. Bimolecular reactions of CH 2CN 2+ with Ar, N 2 and CO: reactivity and dynamics. Phys Chem Chem Phys 2022; 24:15824-15839. [PMID: 35758308 DOI: 10.1039/d2cp01523d] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The reactivity, energetics and dynamics of bimolecular reactions between CH2CN2+ and three neutral species (Ar, N2 and CO) have been studied using a position sensitive coincidence methodology at centre-of-mass collision energies of 4.3-5.0 eV. This is the first study of bimolecular reactions involving CH2CN2+, a species relevant to the ionospheres of planets and satellites, including Titan. All of the collision systems investigated display two collision-induced dissociation (CID) channels, resulting in the formation of C+ + CH2N+ and H+ + HC2N+. Evidence for channels involving further dissociation of the CID product HC2N+, forming H + CCN+, were detected in the N2 and CO systems. Proton-transfer from the dication to the neutral species occurs in all three of the systems via a direct mechanism. Additionally, there are product channels resulting from single electron transfer following collisions of CH2CN2+ with both N2 and CO, but interestingly no electron transfer following collisions with Ar. Electronic structure calculations of the lowest energy electronic states of CH2CN2+ reveal six local geometric minima: both doublet and quartet spin states for cyclic, linear (CH2CN), and linear isocyanide (CH2NC) molecular geometries. The lowest energy electronic state was determined to be the doublet state of the cyclic dication. The ready generation of C+ ions by collision-induced dissociation suggests that the cyclic or linear isocyanide dication geometries are present in the [CH2CN]2+ beam.
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Affiliation(s)
- Sam Armenta Butt
- Department of Chemistry, University College London, 20 Gordon Street, London, WC1H 0AJ, UK.
| | - Stephen D Price
- Department of Chemistry, University College London, 20 Gordon Street, London, WC1H 0AJ, UK.
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Corral AF, Braun RA, Cairns B, Gorooh VA, Liu H, Ma L, Mardi AH, Painemal D, Stamnes S, van Diedenhoven B, Wang H, Yang Y, Zhang B, Sorooshian A. An Overview of Atmospheric Features Over the Western North Atlantic Ocean and North American East Coast - Part 1: Analysis of Aerosols, Gases, and Wet Deposition Chemistry. JOURNAL OF GEOPHYSICAL RESEARCH. ATMOSPHERES : JGR 2021; 126:e2020JD032592. [PMID: 34211820 PMCID: PMC8243758 DOI: 10.1029/2020jd032592] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/24/2020] [Accepted: 11/04/2020] [Indexed: 06/13/2023]
Abstract
The Western North Atlantic Ocean (WNAO) and adjoining East Coast of North America are of great importance for atmospheric research and have been extensively studied for several decades. This broad region exhibits complex meteorological features and a wide range of conditions associated with gas and particulate species from many sources regionally and other continents. As Part 1 of a 2-part paper series, this work characterizes quantities associated with atmospheric chemistry, including gases, aerosols, and wet deposition, by analyzing available satellite observations, ground-based data, model simulations, and reanalysis products. Part 2 provides insight into the atmospheric circulation, boundary layer variability, three-dimensional cloud structure, properties, and precipitation over the WNAO domain. Key results include spatial and seasonal differences in composition along the North American East Coast and over the WNAO associated with varying sources of smoke and dust and meteorological drivers such as temperature, moisture, and precipitation. Spatial and seasonal variations of tropospheric carbon monoxide and ozone highlight different pathways toward the accumulation of these species in the troposphere. Spatial distributions of speciated aerosol optical depth and vertical profiles of aerosol mass mixing ratios show a clear seasonal cycle highlighting the influence of different sources in addition to the impact of intercontinental transport. Analysis of long-term climate model simulations of aerosol species and satellite observations of carbon monoxide confirm that there has been a significant decline in recent decades among anthropogenic constituents owing to regulatory activities.
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Affiliation(s)
- Andrea F Corral
- Department of Chemical and Environmental Engineering, University of Arizona, Tucson, AZ, USA
| | - Rachel A Braun
- Department of Chemical and Environmental Engineering, University of Arizona, Tucson, AZ, USA
| | - Brian Cairns
- NASA Goddard Institute for Space Studies, New York, NY, USA
| | - Vesta Afzali Gorooh
- Center for Hydrometeorology and Remote Sensing (CHRS), Department of Civil and Environmental Engineering, The Henry Samueli School of Engineering, University of California, Irvine, CA, USA
| | - Hongyu Liu
- National Institute of Aerospace, Hampton, VA, USA
| | - Lin Ma
- Department of Chemical and Environmental Engineering, University of Arizona, Tucson, AZ, USA
| | - Ali Hossein Mardi
- Department of Chemical and Environmental Engineering, University of Arizona, Tucson, AZ, USA
| | - David Painemal
- NASA Langley Research Center, Hampton, VA, USA
- Science Systems and Applications, Inc., Hampton, VA, USA
| | | | - Bastiaan van Diedenhoven
- NASA Goddard Institute for Space Studies, New York, NY, USA
- Columbia University Center for Climate System Research, New York, NY, USA
| | - Hailong Wang
- Atmospheric Sciences and Global Change Division, Pacific Northwest National Laboratory, Richland, WA, USA
| | - Yang Yang
- Atmospheric Sciences and Global Change Division, Pacific Northwest National Laboratory, Richland, WA, USA
| | - Bo Zhang
- National Institute of Aerospace, Hampton, VA, USA
| | - Armin Sorooshian
- Department of Chemical and Environmental Engineering, University of Arizona, Tucson, AZ, USA
- Department of Hydrology and Atmospheric Sciences, University of Arizona, Tucson, AZ, USA
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Leung PM, Bay SK, Meier DV, Chiri E, Cowan DA, Gillor O, Woebken D, Greening C. Energetic Basis of Microbial Growth and Persistence in Desert Ecosystems. mSystems 2020; 5:e00495-19. [PMID: 32291352 PMCID: PMC7159902 DOI: 10.1128/msystems.00495-19] [Citation(s) in RCA: 57] [Impact Index Per Article: 14.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
Microbial life is surprisingly abundant and diverse in global desert ecosystems. In these environments, microorganisms endure a multitude of physicochemical stresses, including low water potential, carbon and nitrogen starvation, and extreme temperatures. In this review, we summarize our current understanding of the energetic mechanisms and trophic dynamics that underpin microbial function in desert ecosystems. Accumulating evidence suggests that dormancy is a common strategy that facilitates microbial survival in response to water and carbon limitation. Whereas photoautotrophs are restricted to specific niches in extreme deserts, metabolically versatile heterotrophs persist even in the hyper-arid topsoils of the Atacama Desert and Antarctica. At least three distinct strategies appear to allow such microorganisms to conserve energy in these oligotrophic environments: degradation of organic energy reserves, rhodopsin- and bacteriochlorophyll-dependent light harvesting, and oxidation of the atmospheric trace gases hydrogen and carbon monoxide. In turn, these principles are relevant for understanding the composition, functionality, and resilience of desert ecosystems, as well as predicting responses to the growing problem of desertification.
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Affiliation(s)
- Pok Man Leung
- School of Biological Sciences, Monash University, Clayton, Victoria, Australia
- Department of Microbiology, Biomedicine Discovery Institute, Clayton, Victoria, Australia
| | - Sean K Bay
- School of Biological Sciences, Monash University, Clayton, Victoria, Australia
- Department of Microbiology, Biomedicine Discovery Institute, Clayton, Victoria, Australia
| | - Dimitri V Meier
- Division of Microbial Ecology, Centre for Microbiology and Environmental Systems Science, University of Vienna, Vienna, Austria
| | - Eleonora Chiri
- School of Biological Sciences, Monash University, Clayton, Victoria, Australia
- Department of Microbiology, Biomedicine Discovery Institute, Clayton, Victoria, Australia
| | - Don A Cowan
- Centre for Microbial Ecology and Genomics, University of Pretoria, Hatfield, Pretoria, South Africa
| | - Osnat Gillor
- Zuckerberg Institute for Water Research, Blaustein Institutes for Desert Research, Ben Gurion University of the Negev, Sde Boker, Israel
| | - Dagmar Woebken
- Division of Microbial Ecology, Centre for Microbiology and Environmental Systems Science, University of Vienna, Vienna, Austria
| | - Chris Greening
- School of Biological Sciences, Monash University, Clayton, Victoria, Australia
- Department of Microbiology, Biomedicine Discovery Institute, Clayton, Victoria, Australia
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Composition of Clean Marine Air and Biogenic Influences on VOCs during the MUMBA Campaign. ATMOSPHERE 2019. [DOI: 10.3390/atmos10070383] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
Volatile organic compounds (VOCs) are important precursors to the formation of ozone and fine particulate matter, the two pollutants of most concern in Sydney, Australia. Despite this importance, there are very few published measurements of ambient VOC concentrations in Australia. In this paper, we present mole fractions of several important VOCs measured during the campaign known as MUMBA (Measurements of Urban, Marine and Biogenic Air) in the Australian city of Wollongong (34°S). We particularly focus on measurements made during periods when clean marine air impacted the measurement site and on VOCs of biogenic origin. Typical unpolluted marine air mole fractions during austral summer 2012-2013 at latitude 34°S were established for CO2 (391.0 ± 0.6 ppm), CH4 (1760.1 ± 0.4 ppb), N2O (325.04 ± 0.08 ppb), CO (52.4 ± 1.7 ppb), O3 (20.5 ± 1.1 ppb), acetaldehyde (190 ± 40 ppt), acetone (260 ± 30 ppt), dimethyl sulphide (50 ± 10 ppt), benzene (20 ± 10 ppt), toluene (30 ± 20 ppt), C8H10 aromatics (23 ± 6 ppt) and C9H12 aromatics (36 ± 7 ppt). The MUMBA site was frequently influenced by VOCs of biogenic origin from a nearby strip of forested parkland to the east due to the dominant north-easterly afternoon sea breeze. VOCs from the more distant densely forested escarpment to the west also impacted the site, especially during two days of extreme heat and strong westerly winds. The relative amounts of different biogenic VOCs observed for these two biomes differed, with much larger increases of isoprene than of monoterpenes or methanol during the hot westerly winds from the escarpment than with cooler winds from the east. However, whether this was due to different vegetation types or was solely the result of the extreme temperatures is not entirely clear. We conclude that the clean marine air and biogenic signatures measured during the MUMBA campaign provide useful information about the typical abundance of several key VOCs and can be used to constrain chemical transport model simulations of the atmosphere in this poorly sampled region of the world.
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Laban TL, van Zyl PG, Beukes JP, Vakkari V, Jaars K, Borduas-Dedekind N, Josipovic M, Thompson AM, Kulmala M, Laakso L. Seasonal influences on surface ozone variability in continental South Africa and implications for air quality. ATMOSPHERIC CHEMISTRY AND PHYSICS 2018; 18:15491-15514. [PMID: 32678379 PMCID: PMC7365263 DOI: 10.5194/acp-18-15491-2018] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Although elevated surface ozone (O3) concentrations are observed in many areas within southern Africa, few studies have investigated the regional atmospheric chemistry and dominant atmospheric processes driving surface O3 formation in this region. Therefore, an assessment of comprehensive continuous surface O3 measurements performed at four sites in continental South Africa was conducted. The regional O3 problem was evident, with O3 concentrations regularly exceeding the South African air quality standard limit, while O3 levels were higher compared to other background sites in the Southern Hemisphere. The temporal O3 patterns observed at the four sites resembled typical trends for O3 in continental South Africa, with O3 concentrations peaking in late winter and early spring. Increased O3 concentrations in winter were indicative of increased emissions of O3 precursors from household combustion and other low-level sources, while a spring maximum observed at all the sites was attributed to increased regional biomass burning. Source area maps of O3 and CO indicated significantly higher O3 and CO concentrations associated with air masses passing over a region with increased seasonal open biomass burning, which indicated CO associated with open biomass burning as a major source of O3 in continental South Africa. A strong correlation between O3 on CO was observed, while O3 levels remained relatively constant or decreased with increasing NO x , which supports a VOC-limited regime. The instantaneous production rate of O3 calculated at Welgegund indicated that ~ 40 % of O3 production occurred in the VOC-limited regime. The relationship between O3 and precursor species suggests that continental South Africa can be considered VOC limited, which can be attributed to high anthropogenic emissions of NO x in the interior of South Africa. The study indicated that the most effective emission control strategy to reduce O3 levels in continental South Africa should be CO and VOC reduction, mainly associated with household combustion and regional open biomass burning.
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Affiliation(s)
- Tracey Leah Laban
- Unit for Environmental Sciences and Management, North-West University, Potchefstroom, South Africa
| | - Pieter Gideon van Zyl
- Unit for Environmental Sciences and Management, North-West University, Potchefstroom, South Africa
| | - Johan Paul Beukes
- Unit for Environmental Sciences and Management, North-West University, Potchefstroom, South Africa
| | | | - Kerneels Jaars
- Unit for Environmental Sciences and Management, North-West University, Potchefstroom, South Africa
| | | | - Miroslav Josipovic
- Unit for Environmental Sciences and Management, North-West University, Potchefstroom, South Africa
| | | | - Markku Kulmala
- Department of Physics, University of Helsinki, Helsinki, Finland
| | - Lauri Laakso
- Finnish Meteorological Institute, Helsinki, Finland
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Pougatchev NS, Rinsland CP. Spectroscopic study of the seasonal variation of carbon monoxide vertical distribution above Kitt Peak. ACTA ACUST UNITED AC 2012. [DOI: 10.1029/94jd02387] [Citation(s) in RCA: 56] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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9
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Lai SC, Baker AK, Schuck TJ, Slemr F, Brenninkmeijer CAM, van Velthoven P, Oram DE, Zahn A, Ziereis H. Characterization and source regions of 51 high-CO events observed during Civil Aircraft for the Regular Investigation of the Atmosphere Based on an Instrument Container (CARIBIC) flights between south China and the Philippines, 2005–2008. ACTA ACUST UNITED AC 2011. [DOI: 10.1029/2011jd016375] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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Sikder HA, Suthawaree J, Kato S, Kajii Y. Surface ozone and carbon monoxide levels observed at Oki, Japan: regional air pollution trends in East Asia. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2011; 92:953-959. [PMID: 21129843 DOI: 10.1016/j.jenvman.2010.10.062] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/11/2010] [Revised: 10/26/2010] [Accepted: 10/27/2010] [Indexed: 05/30/2023]
Abstract
Simultaneous ground-based measurements of ozone and carbon monoxide were performed at Oki, Japan, from January 2001 to September 2002 in order to investigate the O(3) and CO characteristics and their distributions. The observations revealed that O(3) and CO concentrations were maximum in springtime and minimum in the summer. The monthly averaged concentrations of O(3) and CO were 60 and 234 ppb in spring and 23 and 106 ppb in summer, respectively. Based on direction, 5-day isentropic backward trajectory analysis was carried out to determine the transport path of air masses, preceding their arrival at Oki. Comparison between classified results from present work and results from the year 1994-1996 was carried out. The O(3) and CO concentration results of classified air masses in our analysis show similar concentration trends to previous findings; highest in the WNW/W, lowest in N/NE and medium levels in NW. Moreover, O(3) levels are higher and CO levels are lower in the present study in all categories.
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Affiliation(s)
- Helena Akhter Sikder
- Applied Chemistry, Faculty of Urban Environmental Sciences, Tokyo Metropolitan University, 1-1 Minami-Ohsawa, Hachioji City, Tokyo 192-0397, Japan.
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Bian H, Chin M, Kawa SR, Yu H, Diehl T, Kucsera T. Multiscale carbon monoxide and aerosol correlations from satellite measurements and the GOCART model: Implication for emissions and atmospheric evolution. ACTA ACUST UNITED AC 2010. [DOI: 10.1029/2009jd012781] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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12
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Yashiro H, Sugawara S, Sudo K, Aoki S, Nakazawa T. Temporal and spatial variations of carbon monoxide over the western part of the Pacific Ocean. ACTA ACUST UNITED AC 2009. [DOI: 10.1029/2008jd010876] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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13
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McMillan WW, Warner JX, Comer MM, Maddy E, Chu A, Sparling L, Eloranta E, Hoff R, Sachse G, Barnet C, Razenkov I, Wolf W. AIRS views transport from 12 to 22 July 2004 Alaskan/Canadian fires: Correlation of AIRS CO and MODIS AOD with forward trajectories and comparison of AIRS CO retrievals with DC-8 in situ measurements during INTEX-A/ICARTT. ACTA ACUST UNITED AC 2008. [DOI: 10.1029/2007jd009711] [Citation(s) in RCA: 45] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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14
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Val Martin M, Honrath RE, Owen RC, Lapina K. Large-scale impacts of anthropogenic pollution and boreal wildfires on the nitrogen oxides over the central North Atlantic region. ACTA ACUST UNITED AC 2008. [DOI: 10.1029/2007jd009689] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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15
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Val Martin M, Honrath RE, Owen RC, Li QB. Seasonal variation of nitrogen oxides in the central North Atlantic lower free troposphere. ACTA ACUST UNITED AC 2008. [DOI: 10.1029/2007jd009688] [Citation(s) in RCA: 37] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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16
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Pirre M, Pisso I, Marécal V, Catoire V, Mébarki Y, Robert C. Intrusion of recent air in midlatitude stratosphere revealed by in situ tracer measurements and trajectory calculations. ACTA ACUST UNITED AC 2008. [DOI: 10.1029/2007jd009188] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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17
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Hellebrand HJ, Schade GW. Carbon monoxide from composting due to thermal oxidation of biomass. JOURNAL OF ENVIRONMENTAL QUALITY 2008; 37:592-598. [PMID: 18396545 DOI: 10.2134/jeq2006.0429] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/26/2023]
Abstract
Emissions of carbon monoxide (CO) were observed from decomposing organic wastes and litter under laboratory, pilot composting plant, and natural conditions. Field studies included air from inside a compost heap of about 200 m3, emissions from composting of livestock wastes at a biologically operating farm, and leaf litter pile air samples. The concentration of CO was up to 120 micromol mol(-1) in the compost piles of green waste, and up to 10 micromol mol(-1) in flux chambers above livestock waste windrow composts. The mean CO flux rates were approximately 20 mg CO m(-2) h(-1) for compost heaps of green waste, and varied from 30 to 100 mg CO m(-2) h(-1) for fresh dung windrows. Laboratory studies using a temperature and ventilation-controlled substrate container were performed to elucidate the origin of CO, and included hay samples of fixed moisture content at temperatures between 5 and 65 degrees C, including nonsterilized as well as sterilized samples. The concentration of CO was up to 160 micromol mol(-1) in these experiments, and Arrhenius-type plot analyses resulted in activation energies of 65 kJ mol(-1) for thermochemically produced CO from the nonsterilized compost substrate. Sterilized samples showed dramatically reduced CO2 but virtually unchanged CO emissions, albeit at a slightly lower activation energy, likely a result of the high-temperature sterilization. Though globally and regionally these CO emissions are only a minor source, thermochemically produced CO emissions might affect local air quality in and near composting facilities.
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Affiliation(s)
- H J Hellebrand
- Leibniz Institute for Agricultural Engineering Potsdam-Bornim (ATB), Max-Eyth-Allee 100, Potsdam, Germany.
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18
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Sawa Y, Tanimoto H, Yonemura S, Matsueda H, Wada A, Taguchi S, Hayasaka T, Tsuruta H, Tohjima Y, Mukai H, Kikuchi N, Katagiri S, Tsuboi K. Widespread pollution events of carbon monoxide observed over the western North Pacific during the East Asian Regional Experiment (EAREX) 2005 campaign. ACTA ACUST UNITED AC 2007. [DOI: 10.1029/2006jd008055] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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19
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Hyer EJ, Allen DJ, Kasischke ES. Examining injection properties of boreal forest fires using surface and satellite measurements of CO transport. ACTA ACUST UNITED AC 2007. [DOI: 10.1029/2006jd008232] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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20
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Hyer EJ, Kasischke ES, Allen DJ. Effects of source temporal resolution on transport simulations of boreal fire emissions. ACTA ACUST UNITED AC 2007. [DOI: 10.1029/2006jd007234] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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21
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Val Martín M, Honrath RE, Owen RC, Pfister G, Fialho P, Barata F. Significant enhancements of nitrogen oxides, black carbon, and ozone in the North Atlantic lower free troposphere resulting from North American boreal wildfires. ACTA ACUST UNITED AC 2006. [DOI: 10.1029/2006jd007530] [Citation(s) in RCA: 142] [Impact Index Per Article: 7.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- M. Val Martín
- Department of Civil and Environmental Engineering; Michigan Technological University; Houghton Michigan USA
| | - R. E. Honrath
- Department of Civil and Environmental Engineering; Michigan Technological University; Houghton Michigan USA
| | - R. C. Owen
- Department of Civil and Environmental Engineering; Michigan Technological University; Houghton Michigan USA
| | - G. Pfister
- Atmospheric Chemistry Division; National Center for Atmospheric Research; Boulder Colorado USA
| | - P. Fialho
- Group of Chemistry and Physics of the Atmosphere; University of the Azores; Terra Chã Portugal
| | - F. Barata
- Group of Chemistry and Physics of the Atmosphere; University of the Azores; Terra Chã Portugal
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Lee BH, Munger JW, Wofsy SC, Goldstein AH. Anthropogenic emissions of nonmethane hydrocarbons in the northeastern United States: Measured seasonal variations from 1992–1996 and 1999–2001. ACTA ACUST UNITED AC 2006. [DOI: 10.1029/2005jd006172] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Koike M, Jones NB, Palmer PI, Matsui H, Zhao Y, Kondo Y, Matsumi Y, Tanimoto H. Seasonal variation of carbon monoxide in northern Japan: Fourier transform IR measurements and source-labeled model calculations. ACTA ACUST UNITED AC 2006. [DOI: 10.1029/2005jd006643] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Auvray M. Long-range transport to Europe: Seasonal variations and implications for the European ozone budget. ACTA ACUST UNITED AC 2005. [DOI: 10.1029/2004jd005503] [Citation(s) in RCA: 140] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Turquety S, Hadji-Lazaro J, Clerbaux C, Hauglustaine DA, Clough SA, Cassé V, Schlüssel P, Mégie G. Operational trace gas retrieval algorithm for the Infrared Atmospheric Sounding Interferometer. ACTA ACUST UNITED AC 2004. [DOI: 10.1029/2004jd004821] [Citation(s) in RCA: 83] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- S. Turquety
- Service d'Aéronomie; Institut Pierre-Simon Laplace; Paris France
| | - J. Hadji-Lazaro
- Service d'Aéronomie; Institut Pierre-Simon Laplace; Paris France
| | - C. Clerbaux
- Service d'Aéronomie; Institut Pierre-Simon Laplace; Paris France
| | - D. A. Hauglustaine
- Laboratoire des Sciences du Climat et de l'Environnement; Institut Pierre-Simon Laplace; Gif-sur-Yvette France
| | - S. A. Clough
- Atmospheric and Environmental Research, Inc.; Lexington Massachusetts USA
| | - V. Cassé
- Centre National d'Etudes Spatiales; Toulouse France
| | - P. Schlüssel
- European Organization for the Exploitation of Meteorological Satellites (EUMETSAT); Darmstadt Germany
| | - G. Mégie
- Service d'Aéronomie; Institut Pierre-Simon Laplace; Paris France
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Weiss-Penzias P, Jaffe DA, Jaeglé L, Liang Q. Influence of long-range-transported pollution on the annual and diurnal cycles of carbon monoxide and ozone at Cheeka Peak Observatory. ACTA ACUST UNITED AC 2004. [DOI: 10.1029/2004jd004505] [Citation(s) in RCA: 32] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Peter Weiss-Penzias
- Interdisciplinary Arts and Sciences; University of Washington; Bothell Washington USA
| | - Daniel A. Jaffe
- Interdisciplinary Arts and Sciences; University of Washington; Bothell Washington USA
| | - Lyatt Jaeglé
- Department of Atmospheric Sciences; University of Washington; Seattle Washington USA
| | - Qing Liang
- Department of Atmospheric Sciences; University of Washington; Seattle Washington USA
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Liang Q, Jaeglé L, Jaffe DA, Weiss-Penzias P, Heckman A, Snow JA. Long-range transport of Asian pollution to the northeast Pacific: Seasonal variations and transport pathways of carbon monoxide. ACTA ACUST UNITED AC 2004. [DOI: 10.1029/2003jd004402] [Citation(s) in RCA: 229] [Impact Index Per Article: 11.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Qing Liang
- Department of Atmospheric Sciences; University of Washington; Seattle Washington USA
| | - Lyatt Jaeglé
- Department of Atmospheric Sciences; University of Washington; Seattle Washington USA
| | - Daniel A. Jaffe
- Interdisciplinary Arts and Sciences; University of Washington; Bothell Washington USA
| | - Peter Weiss-Penzias
- Interdisciplinary Arts and Sciences; University of Washington; Bothell Washington USA
| | - Anna Heckman
- Interdisciplinary Arts and Sciences; University of Washington; Bothell Washington USA
| | - Julie A. Snow
- Science Department; United States Coast Guard Academy; New London Connecticut USA
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Parrish DD. Fraction and composition of NOytransported in air masses lofted from the North American continental boundary layer. ACTA ACUST UNITED AC 2004. [DOI: 10.1029/2003jd004226] [Citation(s) in RCA: 37] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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Park RJ. Global simulation of tropospheric ozone using the University of Maryland Chemical Transport Model (UMD-CTM): 1. Model description and evaluation. ACTA ACUST UNITED AC 2004. [DOI: 10.1029/2003jd004266] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Pfister G. Evaluation of CO simulations and the analysis of the CO budget for Europe. ACTA ACUST UNITED AC 2004. [DOI: 10.1029/2004jd004691] [Citation(s) in RCA: 64] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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Gerbig C, Lin JC, Wofsy SC, Daube BC, Andrews AE, Stephens BB, Bakwin PS, Grainger CA. Toward constraining regional-scale fluxes of CO2with atmospheric observations over a continent: 1. Observed spatial variability from airborne platforms. ACTA ACUST UNITED AC 2003. [DOI: 10.1029/2002jd003018] [Citation(s) in RCA: 129] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- C. Gerbig
- Department of Earth and Planetary Sciences and Division of Engineering and Applied Sciences; Harvard University; Cambridge Massachusetts USA
| | - J. C. Lin
- Department of Earth and Planetary Sciences and Division of Engineering and Applied Sciences; Harvard University; Cambridge Massachusetts USA
| | - S. C. Wofsy
- Department of Earth and Planetary Sciences and Division of Engineering and Applied Sciences; Harvard University; Cambridge Massachusetts USA
| | - B. C. Daube
- Department of Earth and Planetary Sciences and Division of Engineering and Applied Sciences; Harvard University; Cambridge Massachusetts USA
| | - A. E. Andrews
- Department of Earth and Planetary Sciences and Division of Engineering and Applied Sciences; Harvard University; Cambridge Massachusetts USA
| | - B. B. Stephens
- Atmospheric Technology Division; National Center for Atmospheric Research; Boulder Colorado USA
| | - P. S. Bakwin
- Climate Monitoring and Diagnostic Laboratory; National Oceanic and Atmospheric Administration; Boulder Colorado USA
| | - C. A. Grainger
- Department of Atmospheric Sciences; University of North Dakota; Grand Forks North Dakota USA
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Gautrois M, Brauers T, Koppmann R, Rohrer F, Stein O, Rudolph J. Seasonal variability and trends of volatile organic compounds in the lower polar troposphere. ACTA ACUST UNITED AC 2003. [DOI: 10.1029/2002jd002765] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- M. Gautrois
- Institut für Chemie und Dynamik der Geosphäre; Institut II: Troposphäre, Forschungszentrum Jülich; Jülich Germany
| | - T. Brauers
- Institut für Chemie und Dynamik der Geosphäre; Institut II: Troposphäre, Forschungszentrum Jülich; Jülich Germany
| | - R. Koppmann
- Institut für Chemie und Dynamik der Geosphäre; Institut II: Troposphäre, Forschungszentrum Jülich; Jülich Germany
| | - F. Rohrer
- Institut für Chemie und Dynamik der Geosphäre; Institut II: Troposphäre, Forschungszentrum Jülich; Jülich Germany
| | - O. Stein
- Institut für Chemie und Dynamik der Geosphäre; Institut II: Troposphäre, Forschungszentrum Jülich; Jülich Germany
| | - J. Rudolph
- Chemistry Department and Centre for Atmospheric Chemistry; York University; Toronto Ontario Canada
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McMillan WW, McCourt ML, Revercomb HE, Knuteson RO, Christian TJ, Doddridge BG, Hobbs PV, Lukovich JV, Novelli PC, Piketh SJ, Sparling L, Stein D, Swap RJ, Yokelson RJ. Tropospheric carbon monoxide measurements from the Scanning High-Resolution Interferometer Sounder on 7 September 2000 in southern Africa during SAFARI 2000. ACTA ACUST UNITED AC 2003. [DOI: 10.1029/2002jd002335] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- W. W. McMillan
- Physics Department; University of Maryland Baltimore County; Baltimore Maryland USA
| | - M. L. McCourt
- Physics Department; University of Maryland Baltimore County; Baltimore Maryland USA
| | - H. E. Revercomb
- Cooperative Institute for Meteorological Satellite Studies; University of Wisconsin; Madison Wisconsin USA
| | - R. O. Knuteson
- Cooperative Institute for Meteorological Satellite Studies; University of Wisconsin; Madison Wisconsin USA
| | - T. J. Christian
- Department of Chemistry; University of Montana; Missoula Montana USA
| | - B. G. Doddridge
- Department of Meteorology; University of Maryland; College Park Maryland USA
| | - P. V. Hobbs
- Cloud and Aerosol Research Group, Department of Atmospheric Sciences; University of Washington; Seattle Washington USA
| | - J. V. Lukovich
- Joint Center for Earth Systems Technology; University of Maryland Baltimore County; Baltimore Maryland USA
| | - P. C. Novelli
- Climate Monitoring and Diagnostics Laboratory; National Oceanic and Atmospheric Administration (NOAA); Boulder Colorado USA
| | - S. J. Piketh
- Climatology Research Group; University of Witswatersrand; Johannesburg South Africa
| | - L. Sparling
- Physics Department; University of Maryland Baltimore County; Baltimore Maryland USA
| | - D. Stein
- Department of Environmental Sciences; University of Virginia; Charlottesville Virginia USA
| | - R. J. Swap
- Department of Environmental Sciences; University of Virginia; Charlottesville Virginia USA
| | - R. J. Yokelson
- Department of Chemistry; University of Montana; Missoula Montana USA
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Novelli PC. Reanalysis of tropospheric CO trends: Effects of the 1997–1998 wildfires. ACTA ACUST UNITED AC 2003. [DOI: 10.1029/2002jd003031] [Citation(s) in RCA: 227] [Impact Index Per Article: 10.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Pochanart P. Carbon monoxide, regional-scale transport, and biomass burning in tropical continental Southeast Asia: Observations in rural Thailand. ACTA ACUST UNITED AC 2003. [DOI: 10.1029/2002jd003360] [Citation(s) in RCA: 44] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Pochanart P. Regional background ozone and carbon monoxide variations in remote Siberia/East Asia. ACTA ACUST UNITED AC 2003. [DOI: 10.1029/2001jd001412] [Citation(s) in RCA: 74] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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DiNunno B. Central/eastern North Pacific photochemical precursor distributions for fall/spring seasons as defined by airborne field studies. ACTA ACUST UNITED AC 2003. [DOI: 10.1029/2001jd001044] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Sudo K, Takahashi M, Akimoto H. CHASER: A global chemical model of the troposphere 2. Model results and evaluation. ACTA ACUST UNITED AC 2002. [DOI: 10.1029/2001jd001114] [Citation(s) in RCA: 59] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Kengo Sudo
- Center for Climate System Research; University of Tokyo; Tokyo Japan
| | - Masaaki Takahashi
- Center for Climate System Research; University of Tokyo; Tokyo Japan
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Hoor P, Fischer H, Lange L, Lelieveld J, Brunner D. Seasonal variations of a mixing layer in the lowermost stratosphere as identified by the CO-O3correlation from in situ measurements. ACTA ACUST UNITED AC 2002. [DOI: 10.1029/2000jd000289] [Citation(s) in RCA: 144] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Peter Hoor
- Max Planck Institute for Chemistry; Mainz Germany
| | | | - Lutz Lange
- Max Planck Institute for Chemistry; Mainz Germany
| | | | - Dominik Brunner
- Royal Netherlands Meteorological Institute; De Bilt Netherlands
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Jöckel P. The seasonal cycle of cosmogenic14CO at the surface level: A solar cycle adjusted, zonal-average climatology based on observations. ACTA ACUST UNITED AC 2002. [DOI: 10.1029/2001jd001104] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Masarie KA, Langenfelds RL, Allison CE, Conway TJ, Dlugokencky EJ, Francey RJ, Novelli PC, Steele LP, Tans PP, Vaughn B, White JWC. NOAA/CSIRO Flask Air Intercomparison Experiment: A strategy for directly assessing consistency among atmospheric measurements made by independent laboratories. ACTA ACUST UNITED AC 2001. [DOI: 10.1029/2000jd000023] [Citation(s) in RCA: 81] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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Clerbaux C, Hadji-Lazaro J, Hauglustaine D, Mégie G, Khattatov B, Lamarque JF. Assimilation of carbon monoxide measured from satellite in a three-dimensional chemistry-transport model. ACTA ACUST UNITED AC 2001. [DOI: 10.1029/2000jd900682] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Jaffe D, Anderson T, Covert D, Trost B, Danielson J, Simpson W, Blake D, Harris J, Streets D. Observations of ozone and related species in the northeast Pacific during the PHOBEA campaigns: 1. Ground-based observations at Cheeka Peak. ACTA ACUST UNITED AC 2001. [DOI: 10.1029/2000jd900636] [Citation(s) in RCA: 74] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Karlsdóttir S, Isaksen ISA, Myhre G, Berntsen TK. Trend analysis of O3and CO in the period 1980-1996: A three-dimensional model study. ACTA ACUST UNITED AC 2000. [DOI: 10.1029/2000jd900374] [Citation(s) in RCA: 22] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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Holloway JS, Jakoubek RO, Parrish DD, Gerbig C, Volz-Thomas A, Schmitgen S, Fried A, Wert B, Henry B, Drummond JR. Airborne intercomparison of vacuum ultraviolet fluorescence and tunable diode laser absorption measurements of tropospheric carbon monoxide. ACTA ACUST UNITED AC 2000. [DOI: 10.1029/2000jd900237] [Citation(s) in RCA: 130] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Wild O, Prather MJ. Excitation of the primary tropospheric chemical mode in a global three-dimensional model. ACTA ACUST UNITED AC 2000. [DOI: 10.1029/2000jd900399] [Citation(s) in RCA: 84] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Roelofs GJ, Lelieveld J. Tropospheric ozone simulation with a chemistry-general circulation model: Influence of higher hydrocarbon chemistry. ACTA ACUST UNITED AC 2000. [DOI: 10.1029/2000jd900316] [Citation(s) in RCA: 60] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Quay P, King S, White D, Brockington M, Plotkin B, Gammon R, Gerst S, Stutsman J. Atmospheric14CO: A tracer of OH concentration and mixing rates. ACTA ACUST UNITED AC 2000. [DOI: 10.1029/2000jd900122] [Citation(s) in RCA: 20] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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