Comparison of Antarctic polar stratospheric cloud observations by ground-based and space-borne lidar and relevance for chemistry–climate models
A comparison of polar stratospheric cloud (PSC) occurrence from 2006 to 2010 is presented, as observed from the ground-based lidar station at McMurdo (Antarctica) and by the satellite-borne CALIOP lidar (Cloud-Aerosol Lidar with Orthogonal Polarization) measuring over McMurdo. McMurdo (Antarctica) i...
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ftcopernicus:oai:publications.copernicus.org:acp69784 2023-05-15T13:35:06+02:00 Comparison of Antarctic polar stratospheric cloud observations by ground-based and space-borne lidar and relevance for chemistry–climate models Snels, Marcel Scoccione, Andrea Liberto, Luca Colao, Francesco Pitts, Michael Poole, Lamont Deshler, Terry Cairo, Francesco Cagnazzo, Chiara Fierli, Federico 2019-01-24 application/pdf https://doi.org/10.5194/acp-19-955-2019 https://www.atmos-chem-phys.net/19/955/2019/ eng eng doi:10.5194/acp-19-955-2019 https://www.atmos-chem-phys.net/19/955/2019/ eISSN: 1680-7324 Text 2019 ftcopernicus https://doi.org/10.5194/acp-19-955-2019 2019-12-24T09:49:31Z A comparison of polar stratospheric cloud (PSC) occurrence from 2006 to 2010 is presented, as observed from the ground-based lidar station at McMurdo (Antarctica) and by the satellite-borne CALIOP lidar (Cloud-Aerosol Lidar with Orthogonal Polarization) measuring over McMurdo. McMurdo (Antarctica) is one of the primary lidar stations for aerosol measurements of the NDACC (Network for Detection of Atmospheric Climate Change). The ground-based observations have been classified with an algorithm derived from the recent v2 detection and classification scheme, used to classify PSCs observed by CALIOP. A statistical approach has been used to compare ground-based and satellite-based observations, since point-to-point comparison is often troublesome due to the intrinsic differences in the observation geometries and the imperfect overlap of the observed areas. A comparison of space-borne lidar observations and a selection of simulations obtained from chemistry–climate models (CCMs) has been made by using a series of quantitative diagnostics based on the statistical occurrence of different PSC types. The distribution of PSCs over Antarctica, calculated by several CCMVal-2 and CCMI chemistry–climate models has been compared with the PSC coverage observed by the satellite-borne CALIOP lidar. The use of several diagnostic tools, including the temperature dependence of the PSC occurrences, evidences the merits and flaws of the different models. The diagnostic methods have been defined to overcome (at least partially) the possible differences due to the resolution of the models and to identify differences due to microphysics (e.g., the dependence of PSC occurrence on T − T NAT ). A significant temperature bias of most models has been observed, as well as a limited ability to reproduce the longitudinal variations in PSC occurrences observed by CALIOP. In particular, a strong temperature bias has been observed in CCMVal-2 models with a strong impact on PSC formation. The WACCM-CCMI (Whole Atmosphere Community Climate Model – Chemistry-Climate Model Initiative) model compares rather well with the CALIOP observations, although a temperature bias is still present. Text Antarc* Antarctic Antarctica Copernicus Publications: E-Journals Antarctic Atmospheric Chemistry and Physics 19 2 955 972 |
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Open Polar |
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Copernicus Publications: E-Journals |
op_collection_id |
ftcopernicus |
language |
English |
description |
A comparison of polar stratospheric cloud (PSC) occurrence from 2006 to 2010 is presented, as observed from the ground-based lidar station at McMurdo (Antarctica) and by the satellite-borne CALIOP lidar (Cloud-Aerosol Lidar with Orthogonal Polarization) measuring over McMurdo. McMurdo (Antarctica) is one of the primary lidar stations for aerosol measurements of the NDACC (Network for Detection of Atmospheric Climate Change). The ground-based observations have been classified with an algorithm derived from the recent v2 detection and classification scheme, used to classify PSCs observed by CALIOP. A statistical approach has been used to compare ground-based and satellite-based observations, since point-to-point comparison is often troublesome due to the intrinsic differences in the observation geometries and the imperfect overlap of the observed areas. A comparison of space-borne lidar observations and a selection of simulations obtained from chemistry–climate models (CCMs) has been made by using a series of quantitative diagnostics based on the statistical occurrence of different PSC types. The distribution of PSCs over Antarctica, calculated by several CCMVal-2 and CCMI chemistry–climate models has been compared with the PSC coverage observed by the satellite-borne CALIOP lidar. The use of several diagnostic tools, including the temperature dependence of the PSC occurrences, evidences the merits and flaws of the different models. The diagnostic methods have been defined to overcome (at least partially) the possible differences due to the resolution of the models and to identify differences due to microphysics (e.g., the dependence of PSC occurrence on T − T NAT ). A significant temperature bias of most models has been observed, as well as a limited ability to reproduce the longitudinal variations in PSC occurrences observed by CALIOP. In particular, a strong temperature bias has been observed in CCMVal-2 models with a strong impact on PSC formation. The WACCM-CCMI (Whole Atmosphere Community Climate Model – Chemistry-Climate Model Initiative) model compares rather well with the CALIOP observations, although a temperature bias is still present. |
format |
Text |
author |
Snels, Marcel Scoccione, Andrea Liberto, Luca Colao, Francesco Pitts, Michael Poole, Lamont Deshler, Terry Cairo, Francesco Cagnazzo, Chiara Fierli, Federico |
spellingShingle |
Snels, Marcel Scoccione, Andrea Liberto, Luca Colao, Francesco Pitts, Michael Poole, Lamont Deshler, Terry Cairo, Francesco Cagnazzo, Chiara Fierli, Federico Comparison of Antarctic polar stratospheric cloud observations by ground-based and space-borne lidar and relevance for chemistry–climate models |
author_facet |
Snels, Marcel Scoccione, Andrea Liberto, Luca Colao, Francesco Pitts, Michael Poole, Lamont Deshler, Terry Cairo, Francesco Cagnazzo, Chiara Fierli, Federico |
author_sort |
Snels, Marcel |
title |
Comparison of Antarctic polar stratospheric cloud observations by ground-based and space-borne lidar and relevance for chemistry–climate models |
title_short |
Comparison of Antarctic polar stratospheric cloud observations by ground-based and space-borne lidar and relevance for chemistry–climate models |
title_full |
Comparison of Antarctic polar stratospheric cloud observations by ground-based and space-borne lidar and relevance for chemistry–climate models |
title_fullStr |
Comparison of Antarctic polar stratospheric cloud observations by ground-based and space-borne lidar and relevance for chemistry–climate models |
title_full_unstemmed |
Comparison of Antarctic polar stratospheric cloud observations by ground-based and space-borne lidar and relevance for chemistry–climate models |
title_sort |
comparison of antarctic polar stratospheric cloud observations by ground-based and space-borne lidar and relevance for chemistry–climate models |
publishDate |
2019 |
url |
https://doi.org/10.5194/acp-19-955-2019 https://www.atmos-chem-phys.net/19/955/2019/ |
geographic |
Antarctic |
geographic_facet |
Antarctic |
genre |
Antarc* Antarctic Antarctica |
genre_facet |
Antarc* Antarctic Antarctica |
op_source |
eISSN: 1680-7324 |
op_relation |
doi:10.5194/acp-19-955-2019 https://www.atmos-chem-phys.net/19/955/2019/ |
op_doi |
https://doi.org/10.5194/acp-19-955-2019 |
container_title |
Atmospheric Chemistry and Physics |
container_volume |
19 |
container_issue |
2 |
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955 |
op_container_end_page |
972 |
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1766060908758433792 |