Uncertainty in Aerosol Optical Depth From ...
Type de document :
Article dans une revue scientifique: Article original
DOI :
URL permanente :
Titre :
Uncertainty in Aerosol Optical Depth From Modern Aerosol-Climate Models, Reanalyses, and Satellite Products
Auteur(s) :
Vogel, Annika [Auteur]
University of Cologne
Alessa, Ghazi [Auteur]
Max Planck Institute for Meteorology [MPI-M]
Scheele, Robert [Auteur]
University of Cologne
Weber, Lisa [Auteur]
University of Cologne
Doubovik, Oleg [Auteur]
Laboratoire d'Optique Atmosphérique (LOA) - UMR 8518
North, Peter [Auteur]
Swansea University
Fiedler, Stephanie [Auteur]
University of Cologne
University of Cologne
Alessa, Ghazi [Auteur]
Max Planck Institute for Meteorology [MPI-M]
Scheele, Robert [Auteur]
University of Cologne
Weber, Lisa [Auteur]
University of Cologne
Doubovik, Oleg [Auteur]
![refId](/themes/Mirage2//images/idref.png)
Laboratoire d'Optique Atmosphérique (LOA) - UMR 8518
North, Peter [Auteur]
Swansea University
Fiedler, Stephanie [Auteur]
University of Cologne
Titre de la revue :
J. Geophys. Res.-Atmos.
Nom court de la revue :
J. Geophys. Res.-Atmos.
Numéro :
127
Pagination :
-
Date de publication :
2022-02-13
ISSN :
2169-897X
Mot(s)-clé(s) en anglais :
aerosol optical depth
intercomparison
CMIP and AeroCom
reanalyses
satellite products
spatio-temporal climatology
intercomparison
CMIP and AeroCom
reanalyses
satellite products
spatio-temporal climatology
Discipline(s) HAL :
Planète et Univers [physics]/Océan, Atmosphère
Résumé en anglais : [en]
Despite the implication of aerosols for the radiation budget, there are persistent differences in data for the aerosol optical depth (τ) for 1998–2019. This study presents a comprehensive evaluation of the large-scale ...
Lire la suite >Despite the implication of aerosols for the radiation budget, there are persistent differences in data for the aerosol optical depth (τ) for 1998–2019. This study presents a comprehensive evaluation of the large-scale spatio-temporal patterns of mid-visible τ from modern data sets. In total, we assessed 94 different global data sets from eight satellite retrievals, four aerosol-climate model ensembles, one operational ensemble product, two reanalyses, one climatology and one merged satellite product. We include the new satellite data SLSTR and aerosol-climate simulations from the Coupled Model Intercomparison Project Phase 6 (CMIP6) and the Aerosol Comparisons between Observations and Models Phase 3 (AeroCom-III). Our intercomparison highlights model differences and observational uncertainty. Spatial mean τ for 60°N – 60°S ranges from 0.124 to 0.164 for individual satellites, with a mean of 0.14. Averaged τ from aerosol-climate model ensembles fall within this satellite range, but individual models do not. Our assessment suggests no systematic improvement compared to CMIP5 and AeroCom-I. Although some regional biases have been reduced, τ from both CMIP6 and AeroCom-III are for instance substantially larger along extra-tropical storm tracks compared to the satellite products. The considerable uncertainty in observed τ implies that a model evaluation based on a single satellite product might draw biased conclusions. This underlines the need for continued efforts to improve both model and satellite estimates of τ, for example, through measurement campaigns in areas of particularly uncertain satellite estimates identified in this study, to facilitate a better understanding of aerosol effects in the Earth system.Lire moins >
Lire la suite >Despite the implication of aerosols for the radiation budget, there are persistent differences in data for the aerosol optical depth (τ) for 1998–2019. This study presents a comprehensive evaluation of the large-scale spatio-temporal patterns of mid-visible τ from modern data sets. In total, we assessed 94 different global data sets from eight satellite retrievals, four aerosol-climate model ensembles, one operational ensemble product, two reanalyses, one climatology and one merged satellite product. We include the new satellite data SLSTR and aerosol-climate simulations from the Coupled Model Intercomparison Project Phase 6 (CMIP6) and the Aerosol Comparisons between Observations and Models Phase 3 (AeroCom-III). Our intercomparison highlights model differences and observational uncertainty. Spatial mean τ for 60°N – 60°S ranges from 0.124 to 0.164 for individual satellites, with a mean of 0.14. Averaged τ from aerosol-climate model ensembles fall within this satellite range, but individual models do not. Our assessment suggests no systematic improvement compared to CMIP5 and AeroCom-I. Although some regional biases have been reduced, τ from both CMIP6 and AeroCom-III are for instance substantially larger along extra-tropical storm tracks compared to the satellite products. The considerable uncertainty in observed τ implies that a model evaluation based on a single satellite product might draw biased conclusions. This underlines the need for continued efforts to improve both model and satellite estimates of τ, for example, through measurement campaigns in areas of particularly uncertain satellite estimates identified in this study, to facilitate a better understanding of aerosol effects in the Earth system.Lire moins >
Langue :
Anglais
Audience :
Internationale
Vulgarisation :
Non
Établissement(s) :
Université de Lille
CNRS
CNRS
Collections :
Date de dépôt :
2024-01-16T22:40:06Z
2024-02-13T10:31:19Z
2024-02-13T10:31:19Z
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- JGR Atmospheres - 2022 - Vogel - Uncertainty in Aerosol Optical Depth From Modern Aerosol‐Climate Models Reanalyses and.pdf
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