The impact of climate oscillations on the surface energy budget over the Greenland Ice Sheet in a changing climate
Climate change is particularly strong in Greenland, primarily as a result of changes in the transport of heat and moisture from lower latitudes. The atmospheric structures involved influence the surface mass balance (SMB) of the Greenland Ice Sheet (GrIS), and their patterns are largely explained by...
Published in: | The Cryosphere |
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2022
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ftnonlinearchiv:oai:noa.gwlb.de:cop_mods_00062426 2023-05-15T16:25:57+02:00 The impact of climate oscillations on the surface energy budget over the Greenland Ice Sheet in a changing climate Silva, Tiago Abermann, Jakob Noël, Brice Shahi, Sonika van de Berg, Willem Jan Schöner, Wolfgang 2022-08 electronic https://doi.org/10.5194/tc-16-3375-2022 https://noa.gwlb.de/receive/cop_mods_00062426 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00061698/tc-16-3375-2022.pdf https://tc.copernicus.org/articles/16/3375/2022/tc-16-3375-2022.pdf eng eng Copernicus Publications The Cryosphere -- ˜Theœ Cryosphere -- http://www.bibliothek.uni-regensburg.de/ezeit/?2393169 -- http://www.the-cryosphere.net/ -- 1994-0424 https://doi.org/10.5194/tc-16-3375-2022 https://noa.gwlb.de/receive/cop_mods_00062426 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00061698/tc-16-3375-2022.pdf https://tc.copernicus.org/articles/16/3375/2022/tc-16-3375-2022.pdf https://creativecommons.org/licenses/by/4.0/ uneingeschränkt info:eu-repo/semantics/openAccess CC-BY article Verlagsveröffentlichung article Text doc-type:article 2022 ftnonlinearchiv https://doi.org/10.5194/tc-16-3375-2022 2022-09-04T23:11:57Z Climate change is particularly strong in Greenland, primarily as a result of changes in the transport of heat and moisture from lower latitudes. The atmospheric structures involved influence the surface mass balance (SMB) of the Greenland Ice Sheet (GrIS), and their patterns are largely explained by climate oscillations, which describe the internal climate variability. By using k-means clustering, we name the combination of the Greenland Blocking Index, the North Atlantic Oscillation index and the vertically integrated water vapor as NAG (North Atlantic influence on Greenland) with the optimal solution of three clusters (positive, neutral and negative phase). With the support of a polar-adapted regional climate model, typical climate features marked under certain NAG phases are inter-seasonally and regionally analyzed in order to assess the impact of large-scale systems from the North Atlantic on the surface energy budget (SEB) components over the GrIS. Given the pronounced summer mass loss in recent decades (1991–2020), we investigate spatio-temporal changes in SEB components within NAG phases in comparison to the reference period 1959–1990. We report significant atmospheric warming and moistening across all NAG phases. The pronounced atmospheric warming in conjunction with the increase in tropospheric water vapor enhance incoming longwave radiation and thus contribute to surface warming. Surface warming is most evident in winter, although its magnitude and spatial extent depend on the NAG phase. In summer, increases in net shortwave radiation are mainly connected to blocking systems (+ NAG), and their drivers are regionally different. In the southern part of Greenland, the atmosphere has become optically thinner due to the decrease in water vapor, thus allowing more incoming shortwave radiation to reach the surface. However, we find evidence that, in the southern regions, changes in net longwave radiation balance changes in net shortwave radiation, suggesting that the turbulent fluxes control the recent SEB ... Article in Journal/Newspaper Greenland Ice Sheet North Atlantic North Atlantic oscillation The Cryosphere Niedersächsisches Online-Archiv NOA Greenland The Cryosphere 16 8 3375 3391 |
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English |
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article Verlagsveröffentlichung |
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article Verlagsveröffentlichung Silva, Tiago Abermann, Jakob Noël, Brice Shahi, Sonika van de Berg, Willem Jan Schöner, Wolfgang The impact of climate oscillations on the surface energy budget over the Greenland Ice Sheet in a changing climate |
topic_facet |
article Verlagsveröffentlichung |
description |
Climate change is particularly strong in Greenland, primarily as a result of changes in the transport of heat and moisture from lower latitudes. The atmospheric structures involved influence the surface mass balance (SMB) of the Greenland Ice Sheet (GrIS), and their patterns are largely explained by climate oscillations, which describe the internal climate variability. By using k-means clustering, we name the combination of the Greenland Blocking Index, the North Atlantic Oscillation index and the vertically integrated water vapor as NAG (North Atlantic influence on Greenland) with the optimal solution of three clusters (positive, neutral and negative phase). With the support of a polar-adapted regional climate model, typical climate features marked under certain NAG phases are inter-seasonally and regionally analyzed in order to assess the impact of large-scale systems from the North Atlantic on the surface energy budget (SEB) components over the GrIS. Given the pronounced summer mass loss in recent decades (1991–2020), we investigate spatio-temporal changes in SEB components within NAG phases in comparison to the reference period 1959–1990. We report significant atmospheric warming and moistening across all NAG phases. The pronounced atmospheric warming in conjunction with the increase in tropospheric water vapor enhance incoming longwave radiation and thus contribute to surface warming. Surface warming is most evident in winter, although its magnitude and spatial extent depend on the NAG phase. In summer, increases in net shortwave radiation are mainly connected to blocking systems (+ NAG), and their drivers are regionally different. In the southern part of Greenland, the atmosphere has become optically thinner due to the decrease in water vapor, thus allowing more incoming shortwave radiation to reach the surface. However, we find evidence that, in the southern regions, changes in net longwave radiation balance changes in net shortwave radiation, suggesting that the turbulent fluxes control the recent SEB ... |
format |
Article in Journal/Newspaper |
author |
Silva, Tiago Abermann, Jakob Noël, Brice Shahi, Sonika van de Berg, Willem Jan Schöner, Wolfgang |
author_facet |
Silva, Tiago Abermann, Jakob Noël, Brice Shahi, Sonika van de Berg, Willem Jan Schöner, Wolfgang |
author_sort |
Silva, Tiago |
title |
The impact of climate oscillations on the surface energy budget over the Greenland Ice Sheet in a changing climate |
title_short |
The impact of climate oscillations on the surface energy budget over the Greenland Ice Sheet in a changing climate |
title_full |
The impact of climate oscillations on the surface energy budget over the Greenland Ice Sheet in a changing climate |
title_fullStr |
The impact of climate oscillations on the surface energy budget over the Greenland Ice Sheet in a changing climate |
title_full_unstemmed |
The impact of climate oscillations on the surface energy budget over the Greenland Ice Sheet in a changing climate |
title_sort |
impact of climate oscillations on the surface energy budget over the greenland ice sheet in a changing climate |
publisher |
Copernicus Publications |
publishDate |
2022 |
url |
https://doi.org/10.5194/tc-16-3375-2022 https://noa.gwlb.de/receive/cop_mods_00062426 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00061698/tc-16-3375-2022.pdf https://tc.copernicus.org/articles/16/3375/2022/tc-16-3375-2022.pdf |
geographic |
Greenland |
geographic_facet |
Greenland |
genre |
Greenland Ice Sheet North Atlantic North Atlantic oscillation The Cryosphere |
genre_facet |
Greenland Ice Sheet North Atlantic North Atlantic oscillation The Cryosphere |
op_relation |
The Cryosphere -- ˜Theœ Cryosphere -- http://www.bibliothek.uni-regensburg.de/ezeit/?2393169 -- http://www.the-cryosphere.net/ -- 1994-0424 https://doi.org/10.5194/tc-16-3375-2022 https://noa.gwlb.de/receive/cop_mods_00062426 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00061698/tc-16-3375-2022.pdf https://tc.copernicus.org/articles/16/3375/2022/tc-16-3375-2022.pdf |
op_rights |
https://creativecommons.org/licenses/by/4.0/ uneingeschränkt info:eu-repo/semantics/openAccess |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.5194/tc-16-3375-2022 |
container_title |
The Cryosphere |
container_volume |
16 |
container_issue |
8 |
container_start_page |
3375 |
op_container_end_page |
3391 |
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1766014812386492416 |