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Kassianov E, Cromwell E, Monroe J, Riihimaki LD, Flynn C, Barnard J, Michalsky JJ, Hodges G, Shi Y, Comstock JM. Harmonized and high-quality datasets of aerosol optical depth at a US continental site, 1997-2018. Sci Data 2021; 8:82. [PMID: 33707444 PMCID: PMC7952417 DOI: 10.1038/s41597-021-00866-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2020] [Accepted: 02/02/2021] [Indexed: 12/02/2022] Open
Abstract
Aerosol optical depth (AOD) characterizes the aerosol burden in the atmosphere, while its wavelength dependence is a sign of particle size. Long-term records of wavelength-resolved AOD with high quality and suitable continuity are required for climate change assessment. Typically, climate-related studies use AOD products provided by several, and perhaps different, ground-based instruments. The measurements from these instruments often have different accuracy and temporal resolution. To preserve the advantages of these products (high quality) and to reduce their disadvantages (patchy records), we generate a merged dataset obtained from four instruments deployed at a US continental site in which a nearly-continuous AOD record is found at two wavelengths (500 and 870 nm) with high quality and high temporal resolution (1-min) for a 21-yr period (1997-2018). The combined dataset addresses: (1) varying data quality and resolution mismatch of the individual AOD records, and (2) the uncertainty of the merged AOD and its relevance for user-specified needs. The generated dataset will be beneficial for a wide range of applications including aerosol-radiation interactions.
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Affiliation(s)
| | - Erol Cromwell
- Pacific Northwest National Laboratory, Richland, WA, USA.
| | - Justin Monroe
- Cooperative Institute for Mesoscale Meteorological Studies, University of Oklahoma, Norman, OK, USA
- National Oceanic and Atmospheric Administration, National Severe Storms Laboratory, Norman, OK, USA
| | - Laura D Riihimaki
- Cooperative Institute for Research in the Environmental Sciences, Boulder, CO, USA
- National Oceanic and Atmospheric Administration, Global Monitoring Laboratory, Boulder, CO, USA
| | - Connor Flynn
- School of Meteorology, University of Oklahoma, Norman, OK, USA
| | | | - Joseph J Michalsky
- National Oceanic and Atmospheric Administration, Global Monitoring Laboratory, Boulder, CO, USA
| | - Gary Hodges
- Cooperative Institute for Research in the Environmental Sciences, Boulder, CO, USA
- National Oceanic and Atmospheric Administration, Global Monitoring Laboratory, Boulder, CO, USA
| | - Yan Shi
- Pacific Northwest National Laboratory, Richland, WA, USA
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Assessment of the Representativeness of MODIS Aerosol Optical Depth Products at Different Temporal Scales Using Global AERONET Measurements. REMOTE SENSING 2020. [DOI: 10.3390/rs12142330] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Assessments of long-term changes of air quality and global radiative forcing at a large scale heavily rely on satellite aerosol optical depth (AOD) datasets, particularly their temporal binning products. Although some attempts focusing on the validation of long-term satellite AOD have been conducted, there is still a lack of comprehensive quantification and understanding of the representativeness of satellite AOD at different temporal binning scales. Here, we evaluated the performances of the Moderate Resolution Imaging Spectroradiometer (MODIS) AOD products at various temporal scales by comparing the MODIS AOD datasets from both the Terra and Aqua satellites with the entire global AErosol RObotic NETwork (AERONET) observation archive between 2000 and 2017. The uncertainty levels of the MODIS hourly and daily AOD products were similarly high, indicating that MODIS AOD retrievals could be used to represent daily aerosol conditions. The MODIS data showed the reduced quality when integrated from the daily to monthly scale, where the relative mean bias (RMB) changed from 1.09 to 1.21 for MODIS Terra and from 1.04 to 1.17 for MODIS Aqua, respectively. The limitation of valid data availability within a month appeared to be the primary reason for the increased uncertainties in the monthly binning products, and the monthly data associated uncertainties could be reduced when the number of valid AOD retrievals reached 15 times in one month. At all three temporal scales, the uncertainty levels of satellite AOD products decreased with increasing AOD values. The results of this study could provide crucial information for satellite AOD users to better understand the reliability of different temporal AOD binning products and associated uncertainties in their derived long-term trends.
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Pani SK, Lin NH, Chantara S, Wang SH, Khamkaew C, Prapamontol T, Janjai S. Radiative response of biomass-burning aerosols over an urban atmosphere in northern peninsular Southeast Asia. THE SCIENCE OF THE TOTAL ENVIRONMENT 2018; 633:892-911. [PMID: 29602124 DOI: 10.1016/j.scitotenv.2018.03.204] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/10/2017] [Revised: 03/17/2018] [Accepted: 03/18/2018] [Indexed: 05/24/2023]
Abstract
A large concentration of finer particulate matter (PM2.5), the primary air-quality concern in northern peninsular Southeast Asia (PSEA), is believed to be closely related to large amounts of biomass burning (BB) particularly in the dry season. In order to quantitatively estimate the contributions of BB to aerosol radiative effects, we thoroughly investigated the physical, chemical, and optical properties of BB aerosols through the integration of ground-based measurements, satellite retrievals, and modelling tools during the Seven South East Asian Studies/Biomass-burning Aerosols & Stratocumulus Environment: Lifecycles & Interactions Experiment (7-SEAS/BASELInE) campaign in 2014. Clusters were made on the basis of measured BB tracers (Levoglucosan, nss-K+, and NO3-) to classify the degree of influence from BB over an urban atmosphere, viz., Chiang Mai (18.795°N, 98.957°E, 354m.s.l.), Thailand in northern PSEA. Cluster-wise contributions of BB to PM2.5, organic carbon, and elemental carbon were found to be 54-79%, 42-79%, and 39-77%, respectively. Moreover, the cluster-wise aerosol optical index (aerosol optical depth at 500nm≈0.98-2.45), absorption (single scattering albedo ≈0.87-0.85; absorption aerosol optical depth ≈0.15-0.38 at 440nm; absorption Ångström exponent ≈1.43-1.57), and radiative impacts (atmospheric heating rate ≈1.4-3.6Kd-1) displayed consistency with the degree of BB. PM2.5 during Extreme BB (EBB) was ≈4 times higher than during Low BB (LBB), whereas this factor was ≈2.5 for the magnitude of radiative effects. Severe haze (visibility≈4km) due to substantial BB loadings (BB to PM2.5≈79%) with favorable meteorology can significantly impact the local-to-regional air quality and the, daily life of local inhabitants as well as become a respiratory health threat. Additionally, such enhancements in atmospheric heating could potentially influence the regional hydrological cycle and crop productivity over Chiang Mai in northern PSEA.
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Affiliation(s)
- Shantanu Kumar Pani
- Cloud and Aerosol Laboratory, Department of Atmospheric Sciences, National Central University, Taoyuan 32001, Taiwan
| | - Neng-Huei Lin
- Cloud and Aerosol Laboratory, Department of Atmospheric Sciences, National Central University, Taoyuan 32001, Taiwan.
| | - Somporn Chantara
- Environmental Science Research Center, Faculty of Science, Chiang Mai University, Chiang Mai 50200, Thailand.
| | - Sheng-Hsiang Wang
- Cloud and Aerosol Laboratory, Department of Atmospheric Sciences, National Central University, Taoyuan 32001, Taiwan
| | - Chanakarn Khamkaew
- Environmental Science Research Center, Faculty of Science, Chiang Mai University, Chiang Mai 50200, Thailand
| | - Tippawan Prapamontol
- Environment and Health Research Unit, Research Institute for Health Sciences, Chiang Mai University, Chiang Mai 50200, Thailand
| | - Serm Janjai
- Department of Physics, Faculty of Science, Silpakorn University, Nakhon Pathom 73000, Thailand
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Wai KM, Ng EYY, Wong CMS, Tan TZ, Lin TH, Lien WH, Tanner PA, Wang CSH, Lau KKL, He NMH, Kim J. Aerosol pollution and its potential impacts on outdoor human thermal sensation: East Asian perspectives. ENVIRONMENTAL RESEARCH 2017; 158:753-758. [PMID: 28750344 DOI: 10.1016/j.envres.2017.07.036] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/28/2016] [Revised: 07/14/2017] [Accepted: 07/18/2017] [Indexed: 06/07/2023]
Abstract
Aerosols affect the insolation at ground and thus the Aerosol Optical Depth (AOD, a measure of aerosol pollution) plays an important role on the variation of the Physiological Equivalent Temperature (PET) at locations with different aerosol climatology. The aerosol effects upon PET were studied for the first time at four East Asian cities by coupling a radiative transfer model and a human thermal comfort model which were previously well evaluated. Evident with the MODIS and AERONET AOD observations, the aerosol pollution at Beijing and Seoul was higher than at Chiayi (Taiwan) and Hong Kong. Based on the AERONET data, with background AOD levels the selected temperate cities had similar clear-sky PET values especially during summertime, due to their locations at similar latitudes. This also applied to the sub-tropical cities. Increase in the AOD level to the seasonal average one led to an increase in diffuse solar radiation and in turn an increase in PET for people living in all the cities. However, the heavy aerosol loading environment in Beijing and Seoul in summertime (AODs > 3.0 in episodic situations) reduced the total radiative flux and thus PET values in the cities. On the contrary, relatively lower episodic AOD levels in Chiayi and Hong Kong led to strong diffuse and still strong direct radiative fluxes and resulted in higher PET values, relative to those with seasonal averaged AOD levels. People tended to feel from "hot" to "very hot" during summertime when the AOD reached their average levels from the background level. This implies that in future aerosol effects add further burden to the thermal environment apart from the effects of greenhouse gas-induced global warming. Understanding the interaction between ambient aerosols and outdoor thermal environment is an important first step for effective mitigation measures such as urban greening to reduce the risk of human heat stress. It is also critical to make cities more attractive and enhancing to human well-being to achieve enhancing sustainable urbanization as one of the principal goals for the Nature-based Solutions.
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Affiliation(s)
- Ka-Ming Wai
- Institute of Future Cities, Chinese University of Hong Kong, Hong Kong S.A.R, PR China.
| | - Edward Y Y Ng
- Institute of Future Cities, Chinese University of Hong Kong, Hong Kong S.A.R, PR China; School of Architecture, Chinese University of Hong Kong, Hong Kong S.A.R, PR China; Institute of Environment, Energy and Sustainability, Chinese University of Hong Kong, Hong Kong S.A.R, PR China
| | - Charles M S Wong
- Department of Land Surveying and Geo-informatics, Hong Kong Polytechnic University, Hong Kong S.A.R., PR China
| | - Tanya Z Tan
- School of Architecture, Chinese University of Hong Kong, Hong Kong S.A.R, PR China
| | - Tang-Huang Lin
- Center for Space and Remote Sensing Research, National Central University, Taiwan
| | - Wei-Hung Lien
- Graduate Institute of Space Science, National Central University, Taiwan
| | - Peter A Tanner
- Department of Chemistry, Hong Kong Baptist University, Kowloon Tong, Hong Kong S.A.R., PR China
| | - Carlo S H Wang
- Department of Atmospheric Sciences, National Central University, Taiwan
| | - Kevin K L Lau
- School of Architecture, Chinese University of Hong Kong, Hong Kong S.A.R, PR China
| | - Neon M H He
- Institute of Environment, Energy and Sustainability, Chinese University of Hong Kong, Hong Kong S.A.R, PR China
| | - Jhoon Kim
- Department of Atmospheric Science, Yonsei University, Seoul, Republic of Korea
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McComiskey A, Ferrare RA. Aerosol Physical and Optical Properties and Processes in the ARM Program. ACTA ACUST UNITED AC 2016. [DOI: 10.1175/amsmonographs-d-15-0028.1] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
Affiliation(s)
- Allison McComiskey
- Cooperative Institute for Research in Environmental Sciences, University of Colorado Boulder, and NOAA Earth System Research Laboratory, Boulder, Colorado
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Initial Assessment of the Spectrometer for Sky-Scanning, Sun-Tracking Atmospheric Research (4STAR)-Based Aerosol Retrieval: Sensitivity Study. ATMOSPHERE 2012. [DOI: 10.3390/atmos3040495] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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Ramachandran S, Kedia S. Radiative effects of aerosols over Indo-Gangetic plain: environmental (urban vs. rural) and seasonal variations. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2012; 19:2159-2171. [PMID: 22231371 DOI: 10.1007/s11356-011-0715-x] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/12/2011] [Accepted: 12/20/2011] [Indexed: 05/31/2023]
Abstract
Aerosol radiative effects over two environmentally distinct locations, Kanpur (urban site) and Gandhi College (rural location) in the Indo-Gangetic plain (IGP), a regional aerosol hot spot, utilizing the measured optical and physical characteristics of aerosols, an aerosol optical properties model and a radiative transfer model, are examined. Shortwave aerosol radiative forcing (ARF) at the top of the atmosphere (TOA) is < -12 W m( - 2) over Kanpur and Gandhi College. ARF at the surface is ≥ -30 W m( - 2). Atmospheric warming is maximum during premonsoon (>30 W m( - 2)). Shortwave atmospheric heating due to aerosols is >0.4 K/day over IGP and peaks during premonsoon at >0.6 K/day due to lower single scattering albedo (SSA) and higher surface albedo. TOA forcing is always less negative over Kanpur when compared to Gandhi College due to lower surface albedo except in postmonsoon owing to higher SSA. This happens as TOA forcing depends on SSA and surface albedo in addition to aerosol optical depth. The magnitude of longwave forcing and atmospheric cooling in an absolute sense is significantly small and contributes only about 20% or less to the net (shortwave + longwave) forcing. Aerosol radiative effects over these two locations, despite differences in aerosol characteristics, are similar, thus confirming that aerosols and their radiative influence get transported due to circulation. ARF over Kanpur and Gandhi College is an order of magnitude higher when compared to greenhouse gas forcing. A large reduction in surface reaching solar irradiance accompanied by large atmospheric warming can have implications on precipitation and hydrological cycle, and these aerosol radiative effects should be included while performing regional-scale aerosol climate assessments.
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Affiliation(s)
- S Ramachandran
- Space and Atmospheric Sciences Division, Physical Research Laboratory, Navrangpura, Ahmedabad, Gujarat 380009, India.
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Rosário NE, Yamasoe MA, Brindley H, Eck TF, Schafer J. Downwelling solar irradiance in the biomass burning region of the southern Amazon: Dependence on aerosol intensive optical properties and role of water vapor. ACTA ACUST UNITED AC 2011. [DOI: 10.1029/2011jd015956] [Citation(s) in RCA: 11] [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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Guan H, Schmid B, Bucholtz A, Bergstrom R. Sensitivity of shortwave radiative flux density, forcing, and heating rate to the aerosol vertical profile. ACTA ACUST UNITED AC 2010. [DOI: 10.1029/2009jd012907] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Wang P, Knap WH, Kuipers Munneke P, Stammes P. Clear-sky shortwave radiative closure for the Cabauw Baseline Surface Radiation Network site, Netherlands. ACTA ACUST UNITED AC 2009. [DOI: 10.1029/2009jd011978] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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Long CN, Dutton EG, Augustine JA, Wiscombe W, Wild M, McFarlane SA, Flynn CJ. Significant decadal brightening of downwelling shortwave in the continental United States. ACTA ACUST UNITED AC 2009. [DOI: 10.1029/2008jd011263] [Citation(s) in RCA: 98] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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McFarlane SA, Kassianov EI, Barnard J, Flynn C, Ackerman TP. Surface shortwave aerosol radiative forcing during the Atmospheric Radiation Measurement Mobile Facility deployment in Niamey, Niger. ACTA ACUST UNITED AC 2009. [DOI: 10.1029/2008jd010491] [Citation(s) in RCA: 38] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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Stone RS, Anderson GP, Shettle EP, Andrews E, Loukachine K, Dutton EG, Schaaf C, Roman MO. Radiative impact of boreal smoke in the Arctic: Observed and modeled. ACTA ACUST UNITED AC 2008. [DOI: 10.1029/2007jd009657] [Citation(s) in RCA: 75] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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McComiskey A, Schwartz SE, Schmid B, Guan H, Lewis ER, Ricchiazzi P, Ogren JA. Direct aerosol forcing: Calculation from observables and sensitivities to inputs. ACTA ACUST UNITED AC 2008. [DOI: 10.1029/2007jd009170] [Citation(s) in RCA: 141] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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Michalsky JJ, Gueymard C, Kiedron P, McArthur LJB, Philipona R, Stoffel T. A proposed working standard for the measurement of diffuse horizontal shortwave irradiance. ACTA ACUST UNITED AC 2007. [DOI: 10.1029/2007jd008651] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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Fast JD, Gustafson WI, Easter RC, Zaveri RA, Barnard JC, Chapman EG, Grell GA, Peckham SE. Evolution of ozone, particulates, and aerosol direct radiative forcing in the vicinity of Houston using a fully coupled meteorology-chemistry-aerosol model. ACTA ACUST UNITED AC 2006. [DOI: 10.1029/2005jd006721] [Citation(s) in RCA: 708] [Impact Index Per Article: 39.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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