1
|
2019–20 Australian Bushfires and Anomalies in Carbon Monoxide Surface and Column Measurements. ATMOSPHERE 2021. [DOI: 10.3390/atmos12060755] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
In Australia, bushfires are a natural part of the country’s landscape and essential for the regeneration of plant species; however, the 2019–20 bushfires were unprecedented in their extent and intensity. This paper is focused on the 2019–20 Australian bushfires and the resulting surface and column atmospheric carbon monoxide (CO) anomalies around Wollongong. Column CO data from the ground-based Total Carbon Column Observing Network (TCCON) and Network for the Detection of Atmospheric Composition Change (NDACC) site in Wollongong are used together with surface in situ measurements. A systematic comparison was performed between the surface in situ and column measurements of CO to better understand whether column measurements can be used as an estimate of the surface concentrations. If so, satellite column measurements of CO could be used to estimate the exposure of humans to CO and other fire-related pollutants. We find that the enhancements in the column measurements are not always significantly evident in the corresponding surface measurements. Topographical features play a key role in determining the surface exposures from column abundance especially in a coastal city like Wollongong. The topography at Wollongong, combined with meteorological effects, potentially exacerbates differences in the column and surface. Hence, satellite column amounts are unlikely to provide an accurate reflection of exposure at the ground during major events like the 2019–2020 bushfires.
Collapse
|
2
|
Naimark JG, Fiore AM, Jin X, Wang Y, Klovenski E, Braneon C. Evaluating Drought Responses of Surface Ozone Precursor Proxies: Variations With Land Cover Type, Precipitation, and Temperature. GEOPHYSICAL RESEARCH LETTERS 2021; 48:e2020GL091520. [PMID: 35860786 PMCID: PMC9285578 DOI: 10.1029/2020gl091520] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/04/2020] [Revised: 02/02/2021] [Accepted: 03/05/2021] [Indexed: 06/15/2023]
Abstract
Prior work suggests drought exacerbates US air quality by increasing surface ozone concentrations. We analyze 2005-2015 tropospheric column concentrations of two trace gases that serve as proxies for surface ozone precursors retrieved from the OMI/Aura satellite: Nitrogen dioxide (ΩNO2; NOx proxy) and formaldehyde (ΩHCHO; VOC proxy). We find 3.5% and 7.7% summer drought enhancements (classified by SPEI) for ΩNO2 and ΩHCHO, respectively, corroborating signals previously extracted from ground-level observations. When we subset by land cover type, the strongest ΩHCHO drought enhancement (10%) occurs in the woody savannas of the Southeast US. By isolating the influences of precipitation and temperature, we infer that enhanced biogenic VOC emissions in this region increase ΩHCHO independently with both high temperature and low precipitation during drought. The strongest ΩNO2 drought enhancement (6.0%) occurs over Midwest US croplands and grasslands, which we infer to reflect the sensitivity of soil NOx emissions to temperature.
Collapse
Affiliation(s)
- Jacob G. Naimark
- Department of Earth and Environmental Sciences, Columbia CollegeColumbia UniversityNew YorkNYUSA
- Department of Earth and Environmental Sciences, Lamont‐Doherty Earth ObservatoryColumbia UniversityPalisadesNYUSA
| | - Arlene M. Fiore
- Department of Earth and Environmental Sciences, Lamont‐Doherty Earth ObservatoryColumbia UniversityPalisadesNYUSA
| | - Xiaomeng Jin
- Department of ChemistryUniversity of California BerkeleyBerkeleyNYUSA
| | - Yuxuan Wang
- Department of Earth and Atmospheric SciencesUniversity of HoustonHoustonTXUSA
| | - Elizabeth Klovenski
- Department of Earth and Atmospheric SciencesUniversity of HoustonHoustonTXUSA
| | - Christian Braneon
- NASA Goddard Institute for Space Studies (GISS)New YorkNYUSA
- SciSpaceLLCBethesdaMDUSA
| |
Collapse
|
3
|
Harkey M, Holloway T, Kim EJ, Baker KR, Henderson B. Satellite Formaldehyde to Support Model Evaluation. JOURNAL OF GEOPHYSICAL RESEARCH. ATMOSPHERES : JGR 2021; 126:10.1029/2020jd032881. [PMID: 34381662 PMCID: PMC8353957 DOI: 10.1029/2020jd032881] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/08/2020] [Accepted: 12/16/2020] [Indexed: 06/13/2023]
Abstract
Formaldehyde (HCHO), a known carcinogen classified as a hazardous pollutant by the United States Environmental Protection Agency (U.S. EPA), is measured through monitoring networks across the U.S. Since these data are limited in spatial and temporal extent, model simulations from the U.S. EPA Community Multiscale Air Quality (CMAQ) model are used to estimate ambient HCHO exposure for the EPA National Air Toxics Assessment (NATA). Here, we employ satellite HCHO retrievals from the Ozone Monitoring Instrument (OMI)-the NASA retrieval developed by the Smithsonian Astrophysical Observatory (SAO), and the European Union Quality Assurance for Essential Climate Variables (QA4ECV) retrieval-to evaluate three CMAQ configurations, spanning the summers of 2011 and 2016, with differing biogenic emissions inputs and chemical mechanisms. These CMAQ configurations capture the general spatial and temporal behavior of both satellite retrievals, but underestimate column HCHO, particularly in the western U.S. In the southeastern U.S., the comparison with OMI HCHO highlights differences in modeled meteorology and biogenic emissions even with differences in satellite retrievals. All CMAQ configurations show low daily correlations with OMI HCHO (r = 0.26 - 0.38), however, we find higher monthly correlations (r = 0.52 - 0.73), and the models correlate best with the OMI-QA4ECV product. Compared to surface observations, we find improved agreement over a 24-hour period compared to afternoon-only, suggesting daily HCHO amounts are captured with more accuracy than afternoon amounts. This work highlights the potential for synergistic improvements in modeling and satellite retrievals to support near-surface HCHO estimates for the NATA and other applications.
Collapse
Affiliation(s)
- Monica Harkey
- Nelson Institute Center for Sustainability and the Global Environment (SAGE), University of Wisconsin-Madison, 1710 University Ave, Madison WI 53726
| | - Tracey Holloway
- Nelson Institute Center for Sustainability and the Global Environment (SAGE), University of Wisconsin-Madison, 1710 University Ave, Madison WI 53726
- Department of Atmospheric & Oceanic Sciences, University of Wisconsin-Madison, 1225 W Dayton Street, Madison, WI 53706
| | - Eliot J. Kim
- Nelson Institute Center for Sustainability and the Global Environment (SAGE), University of Wisconsin-Madison, 1710 University Ave, Madison WI 53726
| | - Kirk R. Baker
- U.S. Environmental Protection Agency, Research Triangle Park, NC, USA
| | - Barron Henderson
- U.S. Environmental Protection Agency, Research Triangle Park, NC, USA
| |
Collapse
|
4
|
Weng H, Lin J, Martin R, Millet DB, Jaeglé L, Ridley D, Keller C, Li C, Du M, Meng J. Global high-resolution emissions of soil NO x, sea salt aerosols, and biogenic volatile organic compounds. Sci Data 2020; 7:148. [PMID: 32433468 PMCID: PMC7239948 DOI: 10.1038/s41597-020-0488-5] [Citation(s) in RCA: 23] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2019] [Accepted: 04/16/2020] [Indexed: 11/09/2022] Open
Abstract
Natural emissions of air pollutants from the surface play major roles in air quality and climate change. In particular, nitrogen oxides (NOx) emitted from soils contribute ~15% of global NOx emissions, sea salt aerosols are a major player in the climate and chemistry of the marine atmosphere, and biogenic emissions are the dominant source of non-methane volatile organic compounds at the global scale. These natural emissions are often estimated using nonlinear parameterizations, which are sensitive to the horizontal resolutions of inputted meteorological and ancillary data. Here we use the HEMCO model to compute these emissions worldwide at horizontal resolutions of 0.5° lat. × 0.625° lon. for 1980-2017 and 0.25° lat. × 0.3125° lon. for 2014-2017. We further offer the respective emissions at lower resolutions, which can be used to evaluate the impacts of resolution on estimated global and regional emissions. Our long-term high-resolution emission datasets offer useful information to study natural pollution sources and their impacts on air quality, climate, and the carbon cycle.
Collapse
Affiliation(s)
- Hongjian Weng
- Laboratory for Climate and Ocean-Atmosphere Studies, Department of Atmospheric and Oceanic Sciences, School of Physics, Peking University, Beijing, 100871, China
| | - Jintai Lin
- Laboratory for Climate and Ocean-Atmosphere Studies, Department of Atmospheric and Oceanic Sciences, School of Physics, Peking University, Beijing, 100871, China.
| | - Randall Martin
- Energy, Environmental & Chemical Engineering, Washington University in St. Louis, St. Louis, 63130, MO, USA
| | - Dylan B Millet
- Department of Soil, Water, and Climate, University of Minnesota Twin Cities, St Paul, MN, 55455, USA
| | - Lyatt Jaeglé
- Department of Atmospheric Sciences, University of Washington, Seattle, WA, 98195, USA
| | - David Ridley
- Department of Civil and Environmental, Massachusetts Institute of Technology, Cambridge, MA, 02139, USA
| | - Christoph Keller
- Goddard Space Flight Center, NASA Global Modeling and Assimilation Office, Greenbelt, MD, 20771, USA
| | - Chi Li
- Department of Physics and Atmospheric Science, Dalhousie University, Halifax, NS, B3H 4R2, Canada
| | - Mingxi Du
- Laboratory for Climate and Ocean-Atmosphere Studies, Department of Atmospheric and Oceanic Sciences, School of Physics, Peking University, Beijing, 100871, China
| | - Jun Meng
- Energy, Environmental & Chemical Engineering, Washington University in St. Louis, St. Louis, 63130, MO, USA
| |
Collapse
|
5
|
Wennberg PO, Bates KH, Crounse JD, Dodson LG, McVay RC, Mertens LA, Nguyen TB, Praske E, Schwantes RH, Smarte MD, St Clair JM, Teng AP, Zhang X, Seinfeld JH. Gas-Phase Reactions of Isoprene and Its Major Oxidation Products. Chem Rev 2018. [PMID: 29522327 DOI: 10.1021/acs.chemrev.7b00439] [Citation(s) in RCA: 145] [Impact Index Per Article: 24.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Isoprene carries approximately half of the flux of non-methane volatile organic carbon emitted to the atmosphere by the biosphere. Accurate representation of its oxidation rate and products is essential for quantifying its influence on the abundance of the hydroxyl radical (OH), nitrogen oxide free radicals (NO x), ozone (O3), and, via the formation of highly oxygenated compounds, aerosol. We present a review of recent laboratory and theoretical studies of the oxidation pathways of isoprene initiated by addition of OH, O3, the nitrate radical (NO3), and the chlorine atom. From this review, a recommendation for a nearly complete gas-phase oxidation mechanism of isoprene and its major products is developed. The mechanism is compiled with the aims of providing an accurate representation of the flow of carbon while allowing quantification of the impact of isoprene emissions on HO x and NO x free radical concentrations and of the yields of products known to be involved in condensed-phase processes. Finally, a simplified (reduced) mechanism is developed for use in chemical transport models that retains the essential chemistry required to accurately simulate isoprene oxidation under conditions where it occurs in the atmosphere-above forested regions remote from large NO x emissions.
Collapse
|
6
|
El-Sayed MMH, Ortiz-Montalvo DL, Hennigan CJ. The effects of isoprene and NO x on secondary organic aerosols formed through reversible and irreversible uptake to aerosol water. ATMOSPHERIC CHEMISTRY AND PHYSICS 2018; 18:10.5194/acp-18-1171-2018. [PMID: 38915375 PMCID: PMC11194798 DOI: 10.5194/acp-18-1171-2018] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/26/2024]
Abstract
Isoprene oxidation produces water-soluble organic gases capable of partitioning to aerosol liquid water. The formation of secondary organic aerosols through such aqueous pathways (aqSOA) can take place either reversibly or irreversibly; however, the split between these fractions in the atmosphere is highly uncertain. The aim of this study was to characterize the reversibility of aqSOA formed from isoprene at a location in the eastern United States under substantial influence from both anthropogenic and biogenic emissions. The reversible and irreversible uptake of water-soluble organic gases to aerosol water was characterized in Baltimore, Maryland, USA, using measurements of particulate water-soluble organic carbon (WSOCp) in alternating dry and ambient configurations. WSOCp evaporation with drying was observed systematically throughout the late spring and summer, indicating reversible aqSOA formation during these times. We show through time lag analyses that WSOCp concentrations, including the WSOCp that evaporates with drying, peak 6 to 11h after isoprene concentrations, with maxima at a time lag of 9h. The absolute reversible aqSOA concentrations, as well as the relative amount of reversible aqSOA, increased with decreasing NO x /isoprene ratios, suggesting that isoprene epoxydiol (IEPOX) or other low-NO x oxidation products may be responsible for these effects. The observed relationships with NO x and isoprene suggest that this process occurs widely in the atmosphere, and is likely more important in other locations characterized by higher isoprene and/or lower NO x levels. This work underscores the importance of accounting for both reversible and irreversible uptake of isoprene oxidation products to aqueous particles.
Collapse
Affiliation(s)
- Marwa M. H. El-Sayed
- Department of Chemical, Biochemical and Environmental Engineering, University of Maryland, Baltimore County, Baltimore, MD, USA
| | | | - Christopher J. Hennigan
- Department of Chemical, Biochemical and Environmental Engineering, University of Maryland, Baltimore County, Baltimore, MD, USA
| |
Collapse
|
7
|
Srivastva N, Singh A, Bhardwaj Y, Dubey SK. Biotechnological potential for degradation of isoprene: a review. Crit Rev Biotechnol 2017; 38:587-599. [DOI: 10.1080/07388551.2017.1379467] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Affiliation(s)
- Navnita Srivastva
- Department of Botany, Institute of Science, Banaras Hindu University, Varanasi, India
| | - Abhishek Singh
- Department of Botany, Institute of Science, Banaras Hindu University, Varanasi, India
| | - Yashpal Bhardwaj
- Department of Botany, Institute of Science, Banaras Hindu University, Varanasi, India
| | - Suresh Kumar Dubey
- Department of Botany, Institute of Science, Banaras Hindu University, Varanasi, India
| |
Collapse
|
8
|
Lederer MR, Staniec AR, Coates Fuentes ZL, Van Ry DA, Hinrichs RZ. Heterogeneous Reactions of Limonene on Mineral Dust: Impacts of Adsorbed Water and Nitric Acid. J Phys Chem A 2016; 120:9545-9556. [PMID: 27933906 DOI: 10.1021/acs.jpca.6b09865] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Biogenic volatile organic compounds (BVOCs), including the monoterpene limonene, are a major source of secondary organic aerosol (SOA). While gas-phase oxidation initiates the dominant pathway for BVOC conversion to SOA, recent studies have demonstrated that biogenic hydrocarbons can also directly react with acidic droplets. To investigate whether mineral dust may facilitate similar reactive uptake of biogenic hydrocarbons, we studied the heterogeneous reaction of limonene with mineral substrates using condensed-phase infrared spectroscopy and identified the formation of irreversibly adsorbed organic products. For kaolinite, Arizona Test Dust, and silica at 30% relative humidity, GC-MS identified limonene-1,2-diol as the dominant product with total organic surface concentrations on the order of (3-5) × 1018 molecules m-2. Experiments with 18O-labeled water support a mechanism initiated by oxidation of limonene by surface redox sites forming limonene oxide followed by water addition to the epoxide to form limonenediol. Limonene uptake on α-alumina, γ-alumina, and montmorillonite formed additional products in high yield, including carveol, carvone, limonene oxide, and α-terpineol. To model tropospheric processing of mineral aerosol, we also exposed each mineral substrate to gaseous nitric acid prior to limonene uptake and identified similar surface adsorbed products that were formed at rates 2 to 5 times faster than without nitrate coatings. The initial rate of reaction was linearly dependent on gaseous limonene concentration between 5 × 1012 and 5 × 1014 molecules cm-3 (0.22-20.5 ppm) consistent with an Eley-Rideal-type mechanism in which gaseous limonene reacts directly with reactive surface sites. Increasing relative humidity decreased the amount of surface adsorbed products indicating competitive adsorption of surface adsorbed water. Using a laminar flow tube reactor we measured the uptake coefficient for limonene on kaolinite at 25% RH to range from γ = 5.1 × 10-6 to 9.7 × 10-7. After adjusting for reactive surface areas, we estimate uptake coefficients for limonene on HNO3-processed mineral aerosol on the order of (1-6) × 10-6. Although this heterogeneous reaction will not impact the atmospheric lifetime of gaseous limonene, it does provide a new pathway for mineral aerosol to acquire secondary organic matter from biogenic hydrocarbons, which in turn will alter the physical properties of mineral dust.
Collapse
Affiliation(s)
- Madeline R Lederer
- Department of Chemistry, Drew University , Madison, New Jersey 07940, United States
| | - Allison R Staniec
- Department of Chemistry, Drew University , Madison, New Jersey 07940, United States
| | - Zoe L Coates Fuentes
- Department of Chemistry, Drew University , Madison, New Jersey 07940, United States
| | - Daryl A Van Ry
- Department of Chemistry, Drew University , Madison, New Jersey 07940, United States
| | - Ryan Z Hinrichs
- Department of Chemistry, Drew University , Madison, New Jersey 07940, United States
| |
Collapse
|
9
|
Schroeder JR, Crawford JH, Fried A, Walega J, Weinheimer A, Wisthaler A, Müller M, Mikoviny T, Chen G, Shook M, Blake DR, Diskin G, Estes M, Thompson AM, Lefer BL, Long R, Mattson E. Formaldehyde column density measurements as a suitable pathway to estimate near-surface ozone tendencies from space. JOURNAL OF GEOPHYSICAL RESEARCH. ATMOSPHERES : JGR 2016; 121:13088-13112. [PMID: 32812915 PMCID: PMC7430524 DOI: 10.1002/2016jd025419] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/06/2023]
Abstract
In support of future satellite missions that aim to address the current shortcomings in measuring air quality from space, NASA's Deriving Information on Surface Conditions from Column and Vertically Resolved Observations Relevant to Air Quality (DISCOVER-AQ) field campaign was designed to enable exploration of relationships between column measurements of trace species relevant to air quality at high spatial and temporal resolution. In the DISCOVER-AQ data set, a modest correlation (r 2 = 0.45) between ozone (O3) and formaldehyde (CH2O) column densities was observed. Further analysis revealed regional variability in the O3-CH2O relationship, with Maryland having a strong relationship when data were viewed temporally and Houston having a strong relationship when data were viewed spatially. These differences in regional behavior are attributed to differences in volatile organic compound (VOC) emissions. In Maryland, biogenic VOCs were responsible for ~28% of CH2O formation within the boundary layer column, causing CH2O to, in general, increase monotonically throughout the day. In Houston, persistent anthropogenic emissions dominated the local hydrocarbon environment, and no discernable diurnal trend in CH2O was observed. Box model simulations suggested that ambient CH2O mixing ratios have a weak diurnal trend (±20% throughout the day) due to photochemical effects, and that larger diurnal trends are associated with changes in hydrocarbon precursors. Finally, mathematical relationships were developed from first principles and were able to replicate the different behaviors seen in Maryland and Houston. While studies would be necessary to validate these results and determine the regional applicability of the O3-CH2O relationship, the results presented here provide compelling insight into the ability of future satellite missions to aid in monitoring near-surface air quality.
Collapse
Affiliation(s)
- Jason R Schroeder
- NASA Langley Research Center, Hampton, Virginia, USA
- NASA Postdoctoral Program, NASA Langley Research Center, Hampton, Virginia, USA
| | | | - Alan Fried
- Institute of Arctic and Alpine Research, University of Colorado Boulder, Boulder, Colorado, USA
| | - James Walega
- Institute of Arctic and Alpine Research, University of Colorado Boulder, Boulder, Colorado, USA
| | | | - Armin Wisthaler
- Institute of Ion Physics and Applied Physics, University of Innsbruck, Innsbruck, Austria
- Department of Chemistry, University of Oslo, Oslo, Norway
| | - Markus Müller
- Institute of Ion Physics and Applied Physics, University of Innsbruck, Innsbruck, Austria
| | - Tomas Mikoviny
- Department of Chemistry, University of Oslo, Oslo, Norway
| | - Gao Chen
- NASA Langley Research Center, Hampton, Virginia, USA
| | - Michael Shook
- NASA Langley Research Center, Hampton, Virginia, USA
| | - Donald R Blake
- Department of Chemistry, University of California, Irvine, California, USA
| | - Glenn Diskin
- NASA Langley Research Center, Hampton, Virginia, USA
| | - Mark Estes
- Texas Commission on Environmental Quality, Austin, Texas, USA
| | - Anne M Thompson
- Department of Meteorology, Penn State University, University Park, Pennsylvania, USA
- NASA Goddard Space Flight Center, Greenbelt, Maryland, USA
| | - Barry L Lefer
- Department of Earth and Atmospheric Science, University of Houston, Houston, Texas, USA
- Now at NASA Headquarters, Washington, DC, USA
| | - Russell Long
- National Exposure Research Laboratory, U.S. EPA, Research Triangle Park, North Carolina, USA
| | - Eric Mattson
- Colorado Department of Public Health and Environment, Denver, Colorado, USA
| |
Collapse
|
10
|
Wang X, Situ S, Chen W, Zheng J, Guenther A, Fan Q, Chang M. Numerical model to quantify biogenic volatile organic compound emissions: The Pearl River Delta region as a case study. J Environ Sci (China) 2016; 46:72-82. [PMID: 27521938 DOI: 10.1016/j.jes.2015.08.032] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2015] [Revised: 08/31/2015] [Accepted: 08/31/2015] [Indexed: 06/06/2023]
Abstract
This article compiles the actual knowledge of the biogenic volatile organic compound (BVOC) emissions estimated using model methods in the Pearl River Delta (PRD) region, one of the most developed regions in China. The developed history of BVOC emission models is presented briefly and three typical emission models are introduced and compared. The results from local studies related to BVOC emissions have been summarized. Based on this analysis, it is recommended that local researchers conduct BVOC emission studies systematically, from the assessment of model inputs, to compiling regional emission inventories to quantifying the uncertainties and evaluating the model results. Beyond that, more basic researches should be conducted in the future to close the gaps in knowledge on BVOC emission mechanisms, to develop the emission models and to refine the inventory results. This paper can provide a perspective on these aspects in the broad field of research associated with BVOC emissions in the PRD region.
Collapse
Affiliation(s)
- Xuemei Wang
- School of Environmental Science and Engineering, Sun Yat-Sen University, Guangzhou 510275, China.
| | - Shuping Situ
- School of Environmental Science and Engineering, Sun Yat-Sen University, Guangzhou 510275, China; Foshan Environmental Monitoring Center, Foshan 528000, China
| | - Weihua Chen
- School of Environmental Science and Engineering, Sun Yat-Sen University, Guangzhou 510275, China
| | - Junyu Zheng
- School of Environment and Energy, South China University of Technology, Guangzhou 510641, China
| | - Alex Guenther
- Department of Earth System Science, University of California, Irvine, CA 92697-3100, USA
| | - Qi Fan
- School of Environmental Science and Engineering, Sun Yat-Sen University, Guangzhou 510275, China
| | - Ming Chang
- School of Environmental Science and Engineering, Sun Yat-Sen University, Guangzhou 510275, China
| |
Collapse
|
11
|
Huang L, McDonald-Buller E, McGaughey G, Kimura Y, Allen DT. Comparison of regional and global land cover products and the implications for biogenic emission modeling. JOURNAL OF THE AIR & WASTE MANAGEMENT ASSOCIATION (1995) 2015; 65:1194-1205. [PMID: 26068085 DOI: 10.1080/10962247.2015.1057302] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
UNLABELLED Accurate estimates of biogenic emissions are required for air quality models that support the development of air quality management plans and attainment demonstrations. Land cover characterization is an essential driving input for most biogenic emissions models. This work contrasted the global Moderate Resolution Imaging Spectroradiometer (MODIS) land cover product against a regional land cover product developed for the Texas Commissions on Environmental Quality (TCEQ) over four climate regions in eastern Texas, where biogenic emissions comprise a large fraction of the total inventory of volatile organic compounds (VOCs) and land cover is highly diverse. The Model of Emissions of Gases and Aerosols from Nature (MEGAN) was utilized to investigate the influences of land cover characterization on modeled isoprene and monoterpene emissions through changes in the standard emission potential and emission activity factor, both separately and simultaneously. In Central Texas, forest coverage was significantly lower in the MODIS land cover product relative to the TCEQ data, which resulted in substantially lower estimates of isoprene and monoterpene emissions by as much as 90%. Differences in predicted isoprene and monoterpene emissions associated with variability in land cover characterization were primarily caused by differences in the standard emission potential, which is dependent on plant functional type. Photochemical modeling was conducted to investigate the effects of differences in estimated biogenic emissions associated with land cover characterization on predicted ozone concentrations using the Comprehensive Air Quality Model with Extensions (CAMx). Mean differences in maximum daily average 8-hour (MDA8) ozone concentrations were 2 to 6 ppb with maximum differences exceeding 20 ppb. Continued focus should be on reducing uncertainties in the representation of land cover through field validation. IMPLICATIONS Uncertainties in the estimation of biogenic emissions associated with the characterization of land cover in global and regional data products were examined in eastern Texas. Misclassification between trees and low-growing vegetation in central Texas resulted in substantial differences in isoprene and monoterpene emission estimates and predicted ground-level ozone concentrations. Results from this study indicate the importance of land cover validation at regional scales.
Collapse
Affiliation(s)
- Ling Huang
- a Center for Energy and Environmental Resources , University of Texas at Austin , Austin , TX , USA
| | - Elena McDonald-Buller
- a Center for Energy and Environmental Resources , University of Texas at Austin , Austin , TX , USA
| | - Gary McGaughey
- a Center for Energy and Environmental Resources , University of Texas at Austin , Austin , TX , USA
| | - Yosuke Kimura
- a Center for Energy and Environmental Resources , University of Texas at Austin , Austin , TX , USA
| | - David T Allen
- a Center for Energy and Environmental Resources , University of Texas at Austin , Austin , TX , USA
| |
Collapse
|
12
|
Joint Application of Concentration and δ18O to Investigate the Global Atmospheric CO Budget. ATMOSPHERE 2015. [DOI: 10.3390/atmos6050547] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
|
13
|
Hou X, Zhu B, Fei D, Wang D. The impacts of summer monsoons on the ozone budget of the atmospheric boundary layer of the Asia-Pacific region. THE SCIENCE OF THE TOTAL ENVIRONMENT 2015; 502:641-649. [PMID: 25305325 DOI: 10.1016/j.scitotenv.2014.09.075] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/31/2014] [Revised: 09/10/2014] [Accepted: 09/22/2014] [Indexed: 06/04/2023]
Abstract
The seasonal and inter-annual variations of ozone (O3) in the atmospheric boundary layer of the Asia-Pacific Ocean were investigated using model simulations (2001-2007) from the Model of Ozone and Related chemical Tracers, version 4 (MOZART-4). The simulated O3 and diagnostic precipitation are in good agreement with the observations. Model results suggest that the Asia-Pacific monsoon significantly influences the seasonal and inter-annual variations of ozone. The differences of anthropogenic emissions and zonal winds in meridional directions cause a pollutants' transition zone at approximately 20°-30°N. The onset of summer monsoons with a northward migration of the rain belt leads the transition zone to drift north, eventually causing a summer minimum of ozone to the north of 30°N. In years with an early onset of summer monsoons, strong inflows of clean oceanic air lead to low ozone at polluted oceanic sites near the continent, while strong outflows from the continent exist, resulting in high levels of O3 over remote portions of the Asia-Pacific Ocean. The reverse is true in years when the summer monsoon onset is late.
Collapse
Affiliation(s)
- Xuewei Hou
- Collaborative Innovation Center on Forecast and Evaluation of Meteorological Disasters, Nanjing University of Information Science & Technology, Nanjing 210044, China; Key Laboratory for Aerosol-Cloud-Precipitation of China Meteorological Administration, Nanjing University of Information Science and Technology, Nanjing 210044, China
| | - Bin Zhu
- Collaborative Innovation Center on Forecast and Evaluation of Meteorological Disasters, Nanjing University of Information Science & Technology, Nanjing 210044, China; Key Laboratory for Aerosol-Cloud-Precipitation of China Meteorological Administration, Nanjing University of Information Science and Technology, Nanjing 210044, China.
| | - Dongdong Fei
- Collaborative Innovation Center on Forecast and Evaluation of Meteorological Disasters, Nanjing University of Information Science & Technology, Nanjing 210044, China
| | - Dongdong Wang
- Collaborative Innovation Center on Forecast and Evaluation of Meteorological Disasters, Nanjing University of Information Science & Technology, Nanjing 210044, China; Key Laboratory for Aerosol-Cloud-Precipitation of China Meteorological Administration, Nanjing University of Information Science and Technology, Nanjing 210044, China
| |
Collapse
|
14
|
Gustafson WI, Qian Y, Fast JD. Downscaling aerosols and the impact of neglected subgrid processes on direct aerosol radiative forcing for a representative global climate model grid spacing. ACTA ACUST UNITED AC 2011. [DOI: 10.1029/2010jd015480] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
|
15
|
Fang Y, Fiore AM, Horowitz LW, Levy H, Hu Y, Russell AG. Sensitivity of the NOybudget over the United States to anthropogenic and lightning NOxin summer. ACTA ACUST UNITED AC 2010. [DOI: 10.1029/2010jd014079] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
|
16
|
Warneke C, de Gouw JA, Del Negro L, Brioude J, McKeen S, Stark H, Kuster WC, Goldan PD, Trainer M, Fehsenfeld FC, Wiedinmyer C, Guenther AB, Hansel A, Wisthaler A, Atlas E, Holloway JS, Ryerson TB, Peischl J, Huey LG, Hanks ATC. Biogenic emission measurement and inventories determination of biogenic emissions in the eastern United States and Texas and comparison with biogenic emission inventories. ACTA ACUST UNITED AC 2010. [DOI: 10.1029/2009jd012445] [Citation(s) in RCA: 79] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
|
17
|
Pfister GG, Emmons LK, Hess PG, Lamarque JF, Thompson AM, Yorks JE. Analysis of the Summer 2004 ozone budget over the United States using Intercontinental Transport Experiment Ozonesonde Network Study (IONS) observations and Model of Ozone and Related Tracers (MOZART-4) simulations. ACTA ACUST UNITED AC 2008. [DOI: 10.1029/2008jd010190] [Citation(s) in RCA: 47] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
|