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:oai:doaj.org/article:c0ad902a1a554596936b934251ecef76 2023-05-15T15:05:13+02:00 Importance of precipitation seasonality for the interpretation of Eemian ice core isotope records from Greenland W. J. van de Berg M. R. van den Broeke E. van Meijgaard F. Kaspar 2013-07-01 https://doi.org/10.5194/cp-9-1589-2013 http://www.clim-past.net/9/1589/2013/cp-9-1589-2013.pdf https://doaj.org/article/c0ad902a1a554596936b934251ecef76 en eng Copernicus Publications doi:10.5194/cp-9-1589-2013 1814-9324 1814-9332 http://www.clim-past.net/9/1589/2013/cp-9-1589-2013.pdf https://doaj.org/article/c0ad902a1a554596936b934251ecef76 undefined Climate of the Past, Vol 9, Iss 4, Pp 1589-1600 (2013) geo envir Journal Article https://vocabularies.coar-repositories.org/resource_types/c_6501/ 2013 fttriple https://doi.org/10.5194/cp-9-1589-2013 2023-01-22T19:11:35Z 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 |
spellingShingle |
geo envir W. J. van de Berg M. R. van den Broeke E. van Meijgaard F. Kaspar 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 |
W. J. van de Berg M. R. van den Broeke E. van Meijgaard F. Kaspar |
author_facet |
W. J. van de Berg M. R. van den Broeke E. van Meijgaard F. Kaspar |
author_sort |
W. J. van de Berg |
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 |
2013 |
url |
https://doi.org/10.5194/cp-9-1589-2013 http://www.clim-past.net/9/1589/2013/cp-9-1589-2013.pdf https://doaj.org/article/c0ad902a1a554596936b934251ecef76 |
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 |
Climate of the Past, Vol 9, Iss 4, Pp 1589-1600 (2013) |
op_relation |
doi:10.5194/cp-9-1589-2013 1814-9324 1814-9332 http://www.clim-past.net/9/1589/2013/cp-9-1589-2013.pdf https://doaj.org/article/c0ad902a1a554596936b934251ecef76 |
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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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1766336958800330752 |