Antarctic 20th Century Accumulation Changes Based on Regional Climate Model Simulations
The regional climate model HIRHAM has been applied to Antarctica driven at the lateral and lower boundaries by European Reanalysis data ERA-40 for the period 1958–1998. Simulations over 4 decades, carried out with a horizontal resolution of 50 km, deliver a realistic simulation of the Antarctic atmo...
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| Format: | Article |
| Language: | English |
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Wiley
2010-01-01
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| Series: | Advances in Meteorology |
| Online Access: | http://dx.doi.org/10.1155/2010/327172 |
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| author | Klaus Dethloff Ksenia Glushak Annette Rinke Dörthe Handorf |
| author_facet | Klaus Dethloff Ksenia Glushak Annette Rinke Dörthe Handorf |
| author_sort | Klaus Dethloff |
| collection | DOAJ |
| description | The regional climate model HIRHAM has been applied to Antarctica driven at the lateral and lower boundaries by European Reanalysis data ERA-40 for the period 1958–1998. Simulations over 4 decades, carried out with a horizontal resolution of 50 km, deliver a realistic simulation of the Antarctic atmospheric circulation, synoptic-scale pressure systems, and the spatial distribution of precipitation minus sublimation (P-E) structures. The simulated P-E pattern is in qualitative agreement with glaciological estimates. The estimated (P-E) trends demonstrate surfacemass accumulation increase at the West Antarctic coasts and reductions in parts of East Antarctica.
The influence of the Antarctic Oscillation (AAO) on the near-surface climate and the surface mass accumulation over Antarctica have been
investigated on the basis of ERA-40 data and HIRHAM simulations. It is shown that the regional accumulation changes are largely driven by changes in the transient activity around the Antarctic coasts due to the varying AAO phases. During positive AAO, more transient pressure systems travelling towards the continent, and Western Antarctica and parts of South-Eastern Antarctica gain more precipitation and mass. Over central Antarctica the prevailing anticyclone causes a strengthening of polar desertification connected with a reduced surface mass balance in the northern part of East Antarctica. |
| format | Article |
| id | doaj-art-336ecc9e59a0410aaba57997bac39468 |
| institution | Kabale University |
| issn | 1687-9309 1687-9317 |
| language | English |
| publishDate | 2010-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Advances in Meteorology |
| spelling | doaj-art-336ecc9e59a0410aaba57997bac394682025-02-03T00:59:53ZengWileyAdvances in Meteorology1687-93091687-93172010-01-01201010.1155/2010/327172327172Antarctic 20th Century Accumulation Changes Based on Regional Climate Model SimulationsKlaus Dethloff0Ksenia Glushak1Annette Rinke2Dörthe Handorf3Alfred Wegener Institute for Polar and Marine Research, Research Unit Potsdam, Telegrafenberg A43, 14473 Potsdam, GermanyMax Planck Institute for Meteorology, Model and Data, Bundestrasse 53, 20146 Hamburg, GermanyAlfred Wegener Institute for Polar and Marine Research, Research Unit Potsdam, Telegrafenberg A43, 14473 Potsdam, GermanyAlfred Wegener Institute for Polar and Marine Research, Research Unit Potsdam, Telegrafenberg A43, 14473 Potsdam, GermanyThe regional climate model HIRHAM has been applied to Antarctica driven at the lateral and lower boundaries by European Reanalysis data ERA-40 for the period 1958–1998. Simulations over 4 decades, carried out with a horizontal resolution of 50 km, deliver a realistic simulation of the Antarctic atmospheric circulation, synoptic-scale pressure systems, and the spatial distribution of precipitation minus sublimation (P-E) structures. The simulated P-E pattern is in qualitative agreement with glaciological estimates. The estimated (P-E) trends demonstrate surfacemass accumulation increase at the West Antarctic coasts and reductions in parts of East Antarctica. The influence of the Antarctic Oscillation (AAO) on the near-surface climate and the surface mass accumulation over Antarctica have been investigated on the basis of ERA-40 data and HIRHAM simulations. It is shown that the regional accumulation changes are largely driven by changes in the transient activity around the Antarctic coasts due to the varying AAO phases. During positive AAO, more transient pressure systems travelling towards the continent, and Western Antarctica and parts of South-Eastern Antarctica gain more precipitation and mass. Over central Antarctica the prevailing anticyclone causes a strengthening of polar desertification connected with a reduced surface mass balance in the northern part of East Antarctica.http://dx.doi.org/10.1155/2010/327172 |
| spellingShingle | Klaus Dethloff Ksenia Glushak Annette Rinke Dörthe Handorf Antarctic 20th Century Accumulation Changes Based on Regional Climate Model Simulations Advances in Meteorology |
| title | Antarctic 20th Century Accumulation Changes Based on Regional Climate Model Simulations |
| title_full | Antarctic 20th Century Accumulation Changes Based on Regional Climate Model Simulations |
| title_fullStr | Antarctic 20th Century Accumulation Changes Based on Regional Climate Model Simulations |
| title_full_unstemmed | Antarctic 20th Century Accumulation Changes Based on Regional Climate Model Simulations |
| title_short | Antarctic 20th Century Accumulation Changes Based on Regional Climate Model Simulations |
| title_sort | antarctic 20th century accumulation changes based on regional climate model simulations |
| url | http://dx.doi.org/10.1155/2010/327172 |
| work_keys_str_mv | AT klausdethloff antarctic20thcenturyaccumulationchangesbasedonregionalclimatemodelsimulations AT kseniaglushak antarctic20thcenturyaccumulationchangesbasedonregionalclimatemodelsimulations AT annetterinke antarctic20thcenturyaccumulationchangesbasedonregionalclimatemodelsimulations AT dorthehandorf antarctic20thcenturyaccumulationchangesbasedonregionalclimatemodelsimulations |