Forcing and impact of the Northern Hemisphere continental snow cover in 1979–2014
The role of surface ocean anomalies for the continental Northern Hemisphere snow cover is investigated, together with the interactions between snow cover and atmosphere. Four observational datasets and two large multi-model ensembles of atmosphere-only simulations are used, with prescribed sea surfa...
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ftnonlinearchiv:oai:noa.gwlb.de:cop_mods_00063469 2023-05-15T15:09:44+02:00 Forcing and impact of the Northern Hemisphere continental snow cover in 1979–2014 Gastineau, Guillaume Frankignoul, Claude Gao, Yongqi Liang, Yu-Chiao Kwon, Young-Oh Cherchi, Annalisa Ghosh, Rohit Manzini, Eliza Matei, Daniela Mecking, Jennifer Suo, Lingling Tian, Tian Yang, Shuting Zhang, Ying 2022-11 electronic https://doi.org/10.5194/egusphere-2022-939 https://noa.gwlb.de/receive/cop_mods_00063469 https://egusphere.copernicus.org/preprints/egusphere-2022-939/egusphere-2022-939.pdf eng eng Copernicus Publications https://doi.org/10.5194/egusphere-2022-939 https://noa.gwlb.de/receive/cop_mods_00063469 https://egusphere.copernicus.org/preprints/egusphere-2022-939/egusphere-2022-939.pdf https://creativecommons.org/licenses/by/4.0/ uneingeschränkt info:eu-repo/semantics/restrictedAccess CC-BY article Verlagsveröffentlichung article Text doc-type:article 2022 ftnonlinearchiv https://doi.org/10.5194/egusphere-2022-939 2022-11-21T00:12:21Z The role of surface ocean anomalies for the continental Northern Hemisphere snow cover is investigated, together with the interactions between snow cover and atmosphere. Four observational datasets and two large multi-model ensembles of atmosphere-only simulations are used, with prescribed sea surface temperature (SST) and sea ice concentration (SIC). A first ensemble uses observed interannually varying SST and SIC conditions for 1979–2014, while a second ensemble is identical except for SIC where a repeated climatological cycle is used. SST and external forcing typically explain 10 to 25 % of the snow cover variance in model simulations, with a dominant forcing from the tropical and North Pacific SST, while no robust influence of the SIC is found. In observations, the Ural blocking is the main driver of the November and April snow cover over Eastern Eurasia, while the North Atlantic Oscillation (NAO) dominates the snow cover forcing in January. In November and more robustly in January, dipolar anomalies of snow cover over Eurasia, with positive anomalies over Europe and negative anomalies over Southern Siberia, also precede the Arctic Oscillation (AO) by one month. In models, snow cover over western Eurasia in January also precedes by one or two months a negative AO phase. The detailed outputs from one of the models suggest that both the western Eurasia snow cover and polar vortex are generated by Ural blocking, and that both snow cover and polar vortex anomalies act to generate the AO one or two months later. Article in Journal/Newspaper Arctic North Atlantic North Atlantic oscillation Sea ice Siberia Niedersächsisches Online-Archiv NOA Arctic Pacific |
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Open Polar |
collection |
Niedersächsisches Online-Archiv NOA |
op_collection_id |
ftnonlinearchiv |
language |
English |
topic |
article Verlagsveröffentlichung |
spellingShingle |
article Verlagsveröffentlichung Gastineau, Guillaume Frankignoul, Claude Gao, Yongqi Liang, Yu-Chiao Kwon, Young-Oh Cherchi, Annalisa Ghosh, Rohit Manzini, Eliza Matei, Daniela Mecking, Jennifer Suo, Lingling Tian, Tian Yang, Shuting Zhang, Ying Forcing and impact of the Northern Hemisphere continental snow cover in 1979–2014 |
topic_facet |
article Verlagsveröffentlichung |
description |
The role of surface ocean anomalies for the continental Northern Hemisphere snow cover is investigated, together with the interactions between snow cover and atmosphere. Four observational datasets and two large multi-model ensembles of atmosphere-only simulations are used, with prescribed sea surface temperature (SST) and sea ice concentration (SIC). A first ensemble uses observed interannually varying SST and SIC conditions for 1979–2014, while a second ensemble is identical except for SIC where a repeated climatological cycle is used. SST and external forcing typically explain 10 to 25 % of the snow cover variance in model simulations, with a dominant forcing from the tropical and North Pacific SST, while no robust influence of the SIC is found. In observations, the Ural blocking is the main driver of the November and April snow cover over Eastern Eurasia, while the North Atlantic Oscillation (NAO) dominates the snow cover forcing in January. In November and more robustly in January, dipolar anomalies of snow cover over Eurasia, with positive anomalies over Europe and negative anomalies over Southern Siberia, also precede the Arctic Oscillation (AO) by one month. In models, snow cover over western Eurasia in January also precedes by one or two months a negative AO phase. The detailed outputs from one of the models suggest that both the western Eurasia snow cover and polar vortex are generated by Ural blocking, and that both snow cover and polar vortex anomalies act to generate the AO one or two months later. |
format |
Article in Journal/Newspaper |
author |
Gastineau, Guillaume Frankignoul, Claude Gao, Yongqi Liang, Yu-Chiao Kwon, Young-Oh Cherchi, Annalisa Ghosh, Rohit Manzini, Eliza Matei, Daniela Mecking, Jennifer Suo, Lingling Tian, Tian Yang, Shuting Zhang, Ying |
author_facet |
Gastineau, Guillaume Frankignoul, Claude Gao, Yongqi Liang, Yu-Chiao Kwon, Young-Oh Cherchi, Annalisa Ghosh, Rohit Manzini, Eliza Matei, Daniela Mecking, Jennifer Suo, Lingling Tian, Tian Yang, Shuting Zhang, Ying |
author_sort |
Gastineau, Guillaume |
title |
Forcing and impact of the Northern Hemisphere continental snow cover in 1979–2014 |
title_short |
Forcing and impact of the Northern Hemisphere continental snow cover in 1979–2014 |
title_full |
Forcing and impact of the Northern Hemisphere continental snow cover in 1979–2014 |
title_fullStr |
Forcing and impact of the Northern Hemisphere continental snow cover in 1979–2014 |
title_full_unstemmed |
Forcing and impact of the Northern Hemisphere continental snow cover in 1979–2014 |
title_sort |
forcing and impact of the northern hemisphere continental snow cover in 1979–2014 |
publisher |
Copernicus Publications |
publishDate |
2022 |
url |
https://doi.org/10.5194/egusphere-2022-939 https://noa.gwlb.de/receive/cop_mods_00063469 https://egusphere.copernicus.org/preprints/egusphere-2022-939/egusphere-2022-939.pdf |
geographic |
Arctic Pacific |
geographic_facet |
Arctic Pacific |
genre |
Arctic North Atlantic North Atlantic oscillation Sea ice Siberia |
genre_facet |
Arctic North Atlantic North Atlantic oscillation Sea ice Siberia |
op_relation |
https://doi.org/10.5194/egusphere-2022-939 https://noa.gwlb.de/receive/cop_mods_00063469 https://egusphere.copernicus.org/preprints/egusphere-2022-939/egusphere-2022-939.pdf |
op_rights |
https://creativecommons.org/licenses/by/4.0/ uneingeschränkt info:eu-repo/semantics/restrictedAccess |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.5194/egusphere-2022-939 |
_version_ |
1766340863202426880 |