Aerosol direct radiative effects over the northwest Atlantic, northwest Pacific, and North Indian Oceans: estimates based on in-situ chemical and optical measurements and chemical transport modeling
The largest uncertainty in the radiative forcing of climate change over the industrial era is that due to aerosols, a substantial fraction of which is the uncertainty associated with scattering and absorption of shortwave (solar) radiation by anthropogenic aerosols in cloud-free conditions (IPCC, 20...
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ftdoajarticles:oai:doaj.org/article:4f88dddee3b04074926fdeccc6672c0f 2023-05-15T17:45:35+02:00 Aerosol direct radiative effects over the northwest Atlantic, northwest Pacific, and North Indian Oceans: estimates based on in-situ chemical and optical measurements and chemical transport modeling T. S. Bates T. L. Anderson T. Baynard T. Bond O. Boucher G. Carmichael A. Clarke C. Erlick H. Guo L. Horowitz S. Howell S. Kulkarni H. Maring A. McComiskey A. Middlebrook K. Noone C. D. O'Dowd J. Ogren J. Penner P. K. Quinn A. R. Ravishankara D. L. Savoie S. E. Schwartz Y. Shinozuka Y. Tang R. J. Weber Y. Wu 2006-01-01T00:00:00Z https://doaj.org/article/4f88dddee3b04074926fdeccc6672c0f EN eng Copernicus Publications http://www.atmos-chem-phys.net/6/1657/2006/acp-6-1657-2006.pdf https://doaj.org/toc/1680-7316 https://doaj.org/toc/1680-7324 1680-7316 1680-7324 https://doaj.org/article/4f88dddee3b04074926fdeccc6672c0f Atmospheric Chemistry and Physics, Vol 6, Iss 6, Pp 1657-1732 (2006) Physics QC1-999 Chemistry QD1-999 article 2006 ftdoajarticles 2022-12-31T12:39:14Z The largest uncertainty in the radiative forcing of climate change over the industrial era is that due to aerosols, a substantial fraction of which is the uncertainty associated with scattering and absorption of shortwave (solar) radiation by anthropogenic aerosols in cloud-free conditions (IPCC, 2001). Quantifying and reducing the uncertainty in aerosol influences on climate is critical to understanding climate change over the industrial period and to improving predictions of future climate change for assumed emission scenarios. Measurements of aerosol properties during major field campaigns in several regions of the globe during the past decade are contributing to an enhanced understanding of atmospheric aerosols and their effects on light scattering and climate. The present study, which focuses on three regions downwind of major urban/population centers (North Indian Ocean (NIO) during INDOEX, the Northwest Pacific Ocean (NWP) during ACE-Asia, and the Northwest Atlantic Ocean (NWA) during ICARTT), incorporates understanding gained from field observations of aerosol distributions and properties into calculations of perturbations in radiative fluxes due to these aerosols. This study evaluates the current state of observations and of two chemical transport models (STEM and MOZART). Measurements of burdens, extinction optical depth (AOD), and direct radiative effect of aerosols (DRE – change in radiative flux due to total aerosols) are used as measurement-model check points to assess uncertainties. In-situ measured and remotely sensed aerosol properties for each region (mixing state, mass scattering efficiency, single scattering albedo, and angular scattering properties and their dependences on relative humidity) are used as input parameters to two radiative transfer models (GFDL and University of Michigan) to constrain estimates of aerosol radiative effects, with uncertainties in each step propagated through the analysis. Constraining the radiative transfer calculations by observational inputs increases the ... Article in Journal/Newspaper Northwest Atlantic Directory of Open Access Journals: DOAJ Articles Indian Pacific |
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Open Polar |
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Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
Physics QC1-999 Chemistry QD1-999 |
spellingShingle |
Physics QC1-999 Chemistry QD1-999 T. S. Bates T. L. Anderson T. Baynard T. Bond O. Boucher G. Carmichael A. Clarke C. Erlick H. Guo L. Horowitz S. Howell S. Kulkarni H. Maring A. McComiskey A. Middlebrook K. Noone C. D. O'Dowd J. Ogren J. Penner P. K. Quinn A. R. Ravishankara D. L. Savoie S. E. Schwartz Y. Shinozuka Y. Tang R. J. Weber Y. Wu Aerosol direct radiative effects over the northwest Atlantic, northwest Pacific, and North Indian Oceans: estimates based on in-situ chemical and optical measurements and chemical transport modeling |
topic_facet |
Physics QC1-999 Chemistry QD1-999 |
description |
The largest uncertainty in the radiative forcing of climate change over the industrial era is that due to aerosols, a substantial fraction of which is the uncertainty associated with scattering and absorption of shortwave (solar) radiation by anthropogenic aerosols in cloud-free conditions (IPCC, 2001). Quantifying and reducing the uncertainty in aerosol influences on climate is critical to understanding climate change over the industrial period and to improving predictions of future climate change for assumed emission scenarios. Measurements of aerosol properties during major field campaigns in several regions of the globe during the past decade are contributing to an enhanced understanding of atmospheric aerosols and their effects on light scattering and climate. The present study, which focuses on three regions downwind of major urban/population centers (North Indian Ocean (NIO) during INDOEX, the Northwest Pacific Ocean (NWP) during ACE-Asia, and the Northwest Atlantic Ocean (NWA) during ICARTT), incorporates understanding gained from field observations of aerosol distributions and properties into calculations of perturbations in radiative fluxes due to these aerosols. This study evaluates the current state of observations and of two chemical transport models (STEM and MOZART). Measurements of burdens, extinction optical depth (AOD), and direct radiative effect of aerosols (DRE – change in radiative flux due to total aerosols) are used as measurement-model check points to assess uncertainties. In-situ measured and remotely sensed aerosol properties for each region (mixing state, mass scattering efficiency, single scattering albedo, and angular scattering properties and their dependences on relative humidity) are used as input parameters to two radiative transfer models (GFDL and University of Michigan) to constrain estimates of aerosol radiative effects, with uncertainties in each step propagated through the analysis. Constraining the radiative transfer calculations by observational inputs increases the ... |
format |
Article in Journal/Newspaper |
author |
T. S. Bates T. L. Anderson T. Baynard T. Bond O. Boucher G. Carmichael A. Clarke C. Erlick H. Guo L. Horowitz S. Howell S. Kulkarni H. Maring A. McComiskey A. Middlebrook K. Noone C. D. O'Dowd J. Ogren J. Penner P. K. Quinn A. R. Ravishankara D. L. Savoie S. E. Schwartz Y. Shinozuka Y. Tang R. J. Weber Y. Wu |
author_facet |
T. S. Bates T. L. Anderson T. Baynard T. Bond O. Boucher G. Carmichael A. Clarke C. Erlick H. Guo L. Horowitz S. Howell S. Kulkarni H. Maring A. McComiskey A. Middlebrook K. Noone C. D. O'Dowd J. Ogren J. Penner P. K. Quinn A. R. Ravishankara D. L. Savoie S. E. Schwartz Y. Shinozuka Y. Tang R. J. Weber Y. Wu |
author_sort |
T. S. Bates |
title |
Aerosol direct radiative effects over the northwest Atlantic, northwest Pacific, and North Indian Oceans: estimates based on in-situ chemical and optical measurements and chemical transport modeling |
title_short |
Aerosol direct radiative effects over the northwest Atlantic, northwest Pacific, and North Indian Oceans: estimates based on in-situ chemical and optical measurements and chemical transport modeling |
title_full |
Aerosol direct radiative effects over the northwest Atlantic, northwest Pacific, and North Indian Oceans: estimates based on in-situ chemical and optical measurements and chemical transport modeling |
title_fullStr |
Aerosol direct radiative effects over the northwest Atlantic, northwest Pacific, and North Indian Oceans: estimates based on in-situ chemical and optical measurements and chemical transport modeling |
title_full_unstemmed |
Aerosol direct radiative effects over the northwest Atlantic, northwest Pacific, and North Indian Oceans: estimates based on in-situ chemical and optical measurements and chemical transport modeling |
title_sort |
aerosol direct radiative effects over the northwest atlantic, northwest pacific, and north indian oceans: estimates based on in-situ chemical and optical measurements and chemical transport modeling |
publisher |
Copernicus Publications |
publishDate |
2006 |
url |
https://doaj.org/article/4f88dddee3b04074926fdeccc6672c0f |
geographic |
Indian Pacific |
geographic_facet |
Indian Pacific |
genre |
Northwest Atlantic |
genre_facet |
Northwest Atlantic |
op_source |
Atmospheric Chemistry and Physics, Vol 6, Iss 6, Pp 1657-1732 (2006) |
op_relation |
http://www.atmos-chem-phys.net/6/1657/2006/acp-6-1657-2006.pdf https://doaj.org/toc/1680-7316 https://doaj.org/toc/1680-7324 1680-7316 1680-7324 https://doaj.org/article/4f88dddee3b04074926fdeccc6672c0f |
_version_ |
1766148720413376512 |