Aerosol Direct Radiative Effects at the ARM SGP and TWP Sites: Clear Skies
The clear-sky aerosol direct radiative effect (DRE) was estimated at the Atmospheric Radiation Measurement (ARM) Southern Great Plains (SGP) and Tropical Western Pacific (TWP) sites. The NASA Langley Fu-Liou radiation model was used with observed inputs including aerosol vertical extinction profile...
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ftosti:oai:osti.gov:1853468 2023-07-30T03:55:33+02:00 Aerosol Direct Radiative Effects at the ARM SGP and TWP Sites: Clear Skies Wu, Xiaolin Balmes, Kelly A. Fu, Qiang 2022-08-02 application/pdf http://www.osti.gov/servlets/purl/1853468 https://www.osti.gov/biblio/1853468 https://doi.org/10.1029/2020jd033663 unknown http://www.osti.gov/servlets/purl/1853468 https://www.osti.gov/biblio/1853468 https://doi.org/10.1029/2020jd033663 doi:10.1029/2020jd033663 54 ENVIRONMENTAL SCIENCES 37 INORGANIC ORGANIC PHYSICAL AND ANALYTICAL CHEMISTRY 2022 ftosti https://doi.org/10.1029/2020jd033663 2023-07-11T10:10:54Z The clear-sky aerosol direct radiative effect (DRE) was estimated at the Atmospheric Radiation Measurement (ARM) Southern Great Plains (SGP) and Tropical Western Pacific (TWP) sites. The NASA Langley Fu-Liou radiation model was used with observed inputs including aerosol vertical extinction profile from the Raman lidar; spectral aerosol optical depth (AOD), single-scattering albedo and asymmetry factor from Aerosol Robotic Network; temperature and water vapor profiles from radiosondes; and surface shortwave (SW) spectral albedo from radiometers. A radiative closure experiment was conducted for clear-sky conditions. The mean differences of modeled and observed surface downwelling SW total fluxes were 1 W m-2 at SGP and 2 W m -2 at TWP, which are within observational uncertainty. At SGP, the estimated annual mean clear-sky aerosol DRE is -3.00 W m -2 at the top of atmosphere (TOA) and -6.85 W m -2 at the surface. The strongest aerosol DRE of -4.81 (-10.77) W m -2 at the TOA (surface) are in the summer when AODs are largest. The weakest aerosol DRE of -.28 (-2.77) W m -2 at the TOA (surface) are in November–January when AODs and single-scattering albedos are lowest. At TWP, the annual mean clear-sky DRE is -2.82 W m-2 at the TOA and -10.34 W m -2 at the surface. The strongest aerosol DRE of -5.95 (-22.20) W m -2 at the TOA (surface) are in November (October) due to the biomass burning season’s peak. The weakest aerosol DRE of -0.96 (-4.16) W m -2 at the TOA (surface) are in March (April) when AODs are smallest. Other/Unknown Material Aerosol Robotic Network SciTec Connect (Office of Scientific and Technical Information - OSTI, U.S. Department of Energy) Pacific Journal of Geophysical Research: Atmospheres 126 5 |
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Open Polar |
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SciTec Connect (Office of Scientific and Technical Information - OSTI, U.S. Department of Energy) |
op_collection_id |
ftosti |
language |
unknown |
topic |
54 ENVIRONMENTAL SCIENCES 37 INORGANIC ORGANIC PHYSICAL AND ANALYTICAL CHEMISTRY |
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54 ENVIRONMENTAL SCIENCES 37 INORGANIC ORGANIC PHYSICAL AND ANALYTICAL CHEMISTRY Wu, Xiaolin Balmes, Kelly A. Fu, Qiang Aerosol Direct Radiative Effects at the ARM SGP and TWP Sites: Clear Skies |
topic_facet |
54 ENVIRONMENTAL SCIENCES 37 INORGANIC ORGANIC PHYSICAL AND ANALYTICAL CHEMISTRY |
description |
The clear-sky aerosol direct radiative effect (DRE) was estimated at the Atmospheric Radiation Measurement (ARM) Southern Great Plains (SGP) and Tropical Western Pacific (TWP) sites. The NASA Langley Fu-Liou radiation model was used with observed inputs including aerosol vertical extinction profile from the Raman lidar; spectral aerosol optical depth (AOD), single-scattering albedo and asymmetry factor from Aerosol Robotic Network; temperature and water vapor profiles from radiosondes; and surface shortwave (SW) spectral albedo from radiometers. A radiative closure experiment was conducted for clear-sky conditions. The mean differences of modeled and observed surface downwelling SW total fluxes were 1 W m-2 at SGP and 2 W m -2 at TWP, which are within observational uncertainty. At SGP, the estimated annual mean clear-sky aerosol DRE is -3.00 W m -2 at the top of atmosphere (TOA) and -6.85 W m -2 at the surface. The strongest aerosol DRE of -4.81 (-10.77) W m -2 at the TOA (surface) are in the summer when AODs are largest. The weakest aerosol DRE of -.28 (-2.77) W m -2 at the TOA (surface) are in November–January when AODs and single-scattering albedos are lowest. At TWP, the annual mean clear-sky DRE is -2.82 W m-2 at the TOA and -10.34 W m -2 at the surface. The strongest aerosol DRE of -5.95 (-22.20) W m -2 at the TOA (surface) are in November (October) due to the biomass burning season’s peak. The weakest aerosol DRE of -0.96 (-4.16) W m -2 at the TOA (surface) are in March (April) when AODs are smallest. |
author |
Wu, Xiaolin Balmes, Kelly A. Fu, Qiang |
author_facet |
Wu, Xiaolin Balmes, Kelly A. Fu, Qiang |
author_sort |
Wu, Xiaolin |
title |
Aerosol Direct Radiative Effects at the ARM SGP and TWP Sites: Clear Skies |
title_short |
Aerosol Direct Radiative Effects at the ARM SGP and TWP Sites: Clear Skies |
title_full |
Aerosol Direct Radiative Effects at the ARM SGP and TWP Sites: Clear Skies |
title_fullStr |
Aerosol Direct Radiative Effects at the ARM SGP and TWP Sites: Clear Skies |
title_full_unstemmed |
Aerosol Direct Radiative Effects at the ARM SGP and TWP Sites: Clear Skies |
title_sort |
aerosol direct radiative effects at the arm sgp and twp sites: clear skies |
publishDate |
2022 |
url |
http://www.osti.gov/servlets/purl/1853468 https://www.osti.gov/biblio/1853468 https://doi.org/10.1029/2020jd033663 |
geographic |
Pacific |
geographic_facet |
Pacific |
genre |
Aerosol Robotic Network |
genre_facet |
Aerosol Robotic Network |
op_relation |
http://www.osti.gov/servlets/purl/1853468 https://www.osti.gov/biblio/1853468 https://doi.org/10.1029/2020jd033663 doi:10.1029/2020jd033663 |
op_doi |
https://doi.org/10.1029/2020jd033663 |
container_title |
Journal of Geophysical Research: Atmospheres |
container_volume |
126 |
container_issue |
5 |
_version_ |
1772816291598434304 |