Importance of precipitation seasonality for the interpretation of Eemian ice core isotope records from Greenland
The previous interglacial (Eemian, 130–114 kyr BP) had a mean sea level highstand 4 to 7 m above the current level, and, according to climate proxies, a 2 to 6 K warmer Arctic summer climate. Greenland ice cores extending back into the Eemian show a reduced depletion in δ18O of about 3‰ for this per...
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fttriple:oai:gotriple.eu:uMdyuDxgBcIx8aiwslu-2 2023-05-15T15:05:10+02:00 Importance of precipitation seasonality for the interpretation of Eemian ice core isotope records from Greenland Berg, W. J. Broeke, M. R. Meijgaard, E. Kaspar, F. 2018-09-27 https://doi.org/10.5194/cp-9-1589-2013 https://cp.copernicus.org/articles/9/1589/2013/ en eng Copernicus Publications doi:10.5194/cp-9-1589-2013 10670/1.29lq8m 1814-9324 1814-9332 https://cp.copernicus.org/articles/9/1589/2013/ undefined Geographica Helvetica - geography eISSN: 1814-9332 geo envir Text https://vocabularies.coar-repositories.org/resource_types/c_18cf/ Journal Article https://vocabularies.coar-repositories.org/resource_types/c_6501/ 2018 fttriple https://doi.org/10.5194/cp-9-1589-2013 2023-01-22T17:52:14Z The previous interglacial (Eemian, 130–114 kyr BP) had a mean sea level highstand 4 to 7 m above the current level, and, according to climate proxies, a 2 to 6 K warmer Arctic summer climate. Greenland ice cores extending back into the Eemian show a reduced depletion in δ18O of about 3‰ for this period, which suggests a significant warming of several degrees over the Greenland ice sheet. Since the depletion in δ18O depends, among other factors, on the condensation temperature of the precipitation, we analyze climatological processes other than mean temperature changes that influence condensation temperature, using output of the regional climate model RACMO2. This model is driven by ERA-40 reanalysis and ECHO-G GCM boundaries for present-day, preindustrial and Eemian climate. The processes that affect the condensation temperature of the precipitation are analyzed using 6-hourly model output. Our results show that changes in precipitation seasonality can cause significant changes of up to 2 K in the condensation temperature that are unrelated to changes in mean temperature. Article in Journal/Newspaper Arctic Greenland Greenland ice cores ice core Ice Sheet Unknown Arctic Greenland Climate of the Past 9 4 1589 1600 |
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English |
topic |
geo envir |
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geo envir Berg, W. J. Broeke, M. R. Meijgaard, E. Kaspar, F. Importance of precipitation seasonality for the interpretation of Eemian ice core isotope records from Greenland |
topic_facet |
geo envir |
description |
The previous interglacial (Eemian, 130–114 kyr BP) had a mean sea level highstand 4 to 7 m above the current level, and, according to climate proxies, a 2 to 6 K warmer Arctic summer climate. Greenland ice cores extending back into the Eemian show a reduced depletion in δ18O of about 3‰ for this period, which suggests a significant warming of several degrees over the Greenland ice sheet. Since the depletion in δ18O depends, among other factors, on the condensation temperature of the precipitation, we analyze climatological processes other than mean temperature changes that influence condensation temperature, using output of the regional climate model RACMO2. This model is driven by ERA-40 reanalysis and ECHO-G GCM boundaries for present-day, preindustrial and Eemian climate. The processes that affect the condensation temperature of the precipitation are analyzed using 6-hourly model output. Our results show that changes in precipitation seasonality can cause significant changes of up to 2 K in the condensation temperature that are unrelated to changes in mean temperature. |
format |
Article in Journal/Newspaper |
author |
Berg, W. J. Broeke, M. R. Meijgaard, E. Kaspar, F. |
author_facet |
Berg, W. J. Broeke, M. R. Meijgaard, E. Kaspar, F. |
author_sort |
Berg, W. J. |
title |
Importance of precipitation seasonality for the interpretation of Eemian ice core isotope records from Greenland |
title_short |
Importance of precipitation seasonality for the interpretation of Eemian ice core isotope records from Greenland |
title_full |
Importance of precipitation seasonality for the interpretation of Eemian ice core isotope records from Greenland |
title_fullStr |
Importance of precipitation seasonality for the interpretation of Eemian ice core isotope records from Greenland |
title_full_unstemmed |
Importance of precipitation seasonality for the interpretation of Eemian ice core isotope records from Greenland |
title_sort |
importance of precipitation seasonality for the interpretation of eemian ice core isotope records from greenland |
publisher |
Copernicus Publications |
publishDate |
2018 |
url |
https://doi.org/10.5194/cp-9-1589-2013 https://cp.copernicus.org/articles/9/1589/2013/ |
geographic |
Arctic Greenland |
geographic_facet |
Arctic Greenland |
genre |
Arctic Greenland Greenland ice cores ice core Ice Sheet |
genre_facet |
Arctic Greenland Greenland ice cores ice core Ice Sheet |
op_source |
Geographica Helvetica - geography eISSN: 1814-9332 |
op_relation |
doi:10.5194/cp-9-1589-2013 10670/1.29lq8m 1814-9324 1814-9332 https://cp.copernicus.org/articles/9/1589/2013/ |
op_rights |
undefined |
op_doi |
https://doi.org/10.5194/cp-9-1589-2013 |
container_title |
Climate of the Past |
container_volume |
9 |
container_issue |
4 |
container_start_page |
1589 |
op_container_end_page |
1600 |
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1766336918659792896 |