Evaluation of black carbon estimations in global aerosol models
We evaluate black carbon (BC) model predictions from the AeroCom model intercomparison project by considering the diversity among year 2000 model simulations and comparing model predictions with available measurements. These model-measurement intercomparisons include BC surface and aircraft concentr...
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Online Access: | https://research.wur.nl/en/publications/evaluation-of-black-carbon-estimations-in-global-aerosol-models https://doi.org/10.5194/acp-9-9001-2009 |
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ftunivwagenin:oai:library.wur.nl:wurpubs/389695 2024-02-04T09:58:06+01:00 Evaluation of black carbon estimations in global aerosol models Koch, D. Schulz, M. McNaughton, C. Spackman, J.R. Balkanski, Y. Bauer, S. Krol, M.C. 2009 application/pdf https://research.wur.nl/en/publications/evaluation-of-black-carbon-estimations-in-global-aerosol-models https://doi.org/10.5194/acp-9-9001-2009 en eng https://edepot.wur.nl/51935 https://research.wur.nl/en/publications/evaluation-of-black-carbon-estimations-in-global-aerosol-models doi:10.5194/acp-9-9001-2009 info:eu-repo/semantics/openAccess Wageningen University & Research Atmospheric Chemistry and Physics 9 (2009) 22 ISSN: 1680-7316 atmospheric aerosols dust aerosols ground measurements light-absorption mixing state optical-properties radiative impact sky radiance measurements transport model wet deposition info:eu-repo/semantics/article Article/Letter to editor info:eu-repo/semantics/publishedVersion 2009 ftunivwagenin https://doi.org/10.5194/acp-9-9001-2009 2024-01-10T23:23:43Z We evaluate black carbon (BC) model predictions from the AeroCom model intercomparison project by considering the diversity among year 2000 model simulations and comparing model predictions with available measurements. These model-measurement intercomparisons include BC surface and aircraft concentrations, aerosol absorption optical depth (AAOD) retrievals from AERONET and Ozone Monitoring Instrument (OMI) and BC column estimations based on AERONET. In regions other than Asia, most models are biased high compared to surface concentration measurements. However compared with (column) AAOD or BC burden retreivals, the models are generally biased low. The average ratio of model to retrieved AAOD is less than 0.7 in South American and 0.6 in African biomass burning regions; both of these regions lack surface concentration measurements. In Asia the average model to observed ratio is 0.7 for AAOD and 0.5 for BC surface concentrations. Compared with aircraft measurements over the Americas at latitudes between 0 and 50N, the average model is a factor of 8 larger than observed, and most models exceed the measured BC standard deviation in the mid to upper troposphere. At higher latitudes the average model to aircraft BC ratio is 0.4 and models underestimate the observed BC loading in the lower and middle troposphere associated with springtime Arctic haze. Low model bias for AAOD but overestimation of surface and upper atmospheric BC concentrations at lower latitudes suggests that most models are underestimating BC absorption and should improve estimates for refractive index, particle size, and optical effects of BC coating. Retrieval uncertainties and/or differences with model diagnostic treatment may also contribute to the model-measurement disparity. Largest AeroCom model diversity occurred in northern Eurasia and the remote Arctic, regions influenced by anthropogenic sources. Changing emissions, aging, removal, or optical properties within a single model generated a smaller change in model predictions than the range ... Article in Journal/Newspaper Arctic black carbon Wageningen UR (University & Research Centre): Digital Library Arctic Atmospheric Chemistry and Physics 9 22 9001 9026 |
institution |
Open Polar |
collection |
Wageningen UR (University & Research Centre): Digital Library |
op_collection_id |
ftunivwagenin |
language |
English |
topic |
atmospheric aerosols dust aerosols ground measurements light-absorption mixing state optical-properties radiative impact sky radiance measurements transport model wet deposition |
spellingShingle |
atmospheric aerosols dust aerosols ground measurements light-absorption mixing state optical-properties radiative impact sky radiance measurements transport model wet deposition Koch, D. Schulz, M. McNaughton, C. Spackman, J.R. Balkanski, Y. Bauer, S. Krol, M.C. Evaluation of black carbon estimations in global aerosol models |
topic_facet |
atmospheric aerosols dust aerosols ground measurements light-absorption mixing state optical-properties radiative impact sky radiance measurements transport model wet deposition |
description |
We evaluate black carbon (BC) model predictions from the AeroCom model intercomparison project by considering the diversity among year 2000 model simulations and comparing model predictions with available measurements. These model-measurement intercomparisons include BC surface and aircraft concentrations, aerosol absorption optical depth (AAOD) retrievals from AERONET and Ozone Monitoring Instrument (OMI) and BC column estimations based on AERONET. In regions other than Asia, most models are biased high compared to surface concentration measurements. However compared with (column) AAOD or BC burden retreivals, the models are generally biased low. The average ratio of model to retrieved AAOD is less than 0.7 in South American and 0.6 in African biomass burning regions; both of these regions lack surface concentration measurements. In Asia the average model to observed ratio is 0.7 for AAOD and 0.5 for BC surface concentrations. Compared with aircraft measurements over the Americas at latitudes between 0 and 50N, the average model is a factor of 8 larger than observed, and most models exceed the measured BC standard deviation in the mid to upper troposphere. At higher latitudes the average model to aircraft BC ratio is 0.4 and models underestimate the observed BC loading in the lower and middle troposphere associated with springtime Arctic haze. Low model bias for AAOD but overestimation of surface and upper atmospheric BC concentrations at lower latitudes suggests that most models are underestimating BC absorption and should improve estimates for refractive index, particle size, and optical effects of BC coating. Retrieval uncertainties and/or differences with model diagnostic treatment may also contribute to the model-measurement disparity. Largest AeroCom model diversity occurred in northern Eurasia and the remote Arctic, regions influenced by anthropogenic sources. Changing emissions, aging, removal, or optical properties within a single model generated a smaller change in model predictions than the range ... |
format |
Article in Journal/Newspaper |
author |
Koch, D. Schulz, M. McNaughton, C. Spackman, J.R. Balkanski, Y. Bauer, S. Krol, M.C. |
author_facet |
Koch, D. Schulz, M. McNaughton, C. Spackman, J.R. Balkanski, Y. Bauer, S. Krol, M.C. |
author_sort |
Koch, D. |
title |
Evaluation of black carbon estimations in global aerosol models |
title_short |
Evaluation of black carbon estimations in global aerosol models |
title_full |
Evaluation of black carbon estimations in global aerosol models |
title_fullStr |
Evaluation of black carbon estimations in global aerosol models |
title_full_unstemmed |
Evaluation of black carbon estimations in global aerosol models |
title_sort |
evaluation of black carbon estimations in global aerosol models |
publishDate |
2009 |
url |
https://research.wur.nl/en/publications/evaluation-of-black-carbon-estimations-in-global-aerosol-models https://doi.org/10.5194/acp-9-9001-2009 |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic black carbon |
genre_facet |
Arctic black carbon |
op_source |
Atmospheric Chemistry and Physics 9 (2009) 22 ISSN: 1680-7316 |
op_relation |
https://edepot.wur.nl/51935 https://research.wur.nl/en/publications/evaluation-of-black-carbon-estimations-in-global-aerosol-models doi:10.5194/acp-9-9001-2009 |
op_rights |
info:eu-repo/semantics/openAccess Wageningen University & Research |
op_doi |
https://doi.org/10.5194/acp-9-9001-2009 |
container_title |
Atmospheric Chemistry and Physics |
container_volume |
9 |
container_issue |
22 |
container_start_page |
9001 |
op_container_end_page |
9026 |
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1789962432527990784 |