Possible changes of δ 18 O in precipitation caused by a meltwater event in the North Atlantic
The Hamburg atmosphere general circulation model ECHAM-4 is used to investigate how a meltwater event in the North Atlantic might alter the signal of stable water isotopes (H-2 O-18, HDO) in precipitation. Our results show that such a meltwater event will cause significant changes in the isotopic co...
Published in: | Journal of Geophysical Research: Atmospheres |
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ftpubman:oai:pure.mpg.de:item_1690922 2023-08-27T04:10:43+02:00 Possible changes of δ 18 O in precipitation caused by a meltwater event in the North Atlantic Werner, M. Mikolajewicz, U. Hoffmann, G. Heimann, M. 2000 application/octet-stream http://hdl.handle.net/11858/00-001M-0000-000E-CD47-2 http://hdl.handle.net/11858/00-001M-0000-000E-CD46-4 unknown info:eu-repo/semantics/altIdentifier/doi/10.1029/1999JD901196 http://hdl.handle.net/11858/00-001M-0000-000E-CD47-2 http://hdl.handle.net/11858/00-001M-0000-000E-CD46-4 Journal of Geophysical Research: Atmospheres info:eu-repo/semantics/article 2000 ftpubman https://doi.org/10.1029/1999JD901196 2023-08-02T01:02:48Z The Hamburg atmosphere general circulation model ECHAM-4 is used to investigate how a meltwater event in the North Atlantic might alter the signal of stable water isotopes (H-2 O-18, HDO) in precipitation. Our results show that such a meltwater event will cause significant changes in the isotopic composition of the precipitation over many parts of the Northern Hemisphere, but also in the tropical Atlantic region. Model simulations suggest that for such a scenario isotope anomalies are not only related to temperature changes, but also to changes in the seasonality of precipitation or the precipitation amount. A changed isotopic composition of evaporating ocean surface waters (caused by a massive meltwater input into the North Atlantic) causes temperature-independent isotope anomalies, too. Changes of the deuterium excess are even more affected by the imposed oceanic isotope anomaly due to the nonlinearity of the evaporation process. [References: 28] Article in Journal/Newspaper North Atlantic Max Planck Society: MPG.PuRe Journal of Geophysical Research: Atmospheres 105 D8 10161 10167 |
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Max Planck Society: MPG.PuRe |
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The Hamburg atmosphere general circulation model ECHAM-4 is used to investigate how a meltwater event in the North Atlantic might alter the signal of stable water isotopes (H-2 O-18, HDO) in precipitation. Our results show that such a meltwater event will cause significant changes in the isotopic composition of the precipitation over many parts of the Northern Hemisphere, but also in the tropical Atlantic region. Model simulations suggest that for such a scenario isotope anomalies are not only related to temperature changes, but also to changes in the seasonality of precipitation or the precipitation amount. A changed isotopic composition of evaporating ocean surface waters (caused by a massive meltwater input into the North Atlantic) causes temperature-independent isotope anomalies, too. Changes of the deuterium excess are even more affected by the imposed oceanic isotope anomaly due to the nonlinearity of the evaporation process. [References: 28] |
format |
Article in Journal/Newspaper |
author |
Werner, M. Mikolajewicz, U. Hoffmann, G. Heimann, M. |
spellingShingle |
Werner, M. Mikolajewicz, U. Hoffmann, G. Heimann, M. Possible changes of δ 18 O in precipitation caused by a meltwater event in the North Atlantic |
author_facet |
Werner, M. Mikolajewicz, U. Hoffmann, G. Heimann, M. |
author_sort |
Werner, M. |
title |
Possible changes of δ 18 O in precipitation caused by a meltwater event in the North Atlantic |
title_short |
Possible changes of δ 18 O in precipitation caused by a meltwater event in the North Atlantic |
title_full |
Possible changes of δ 18 O in precipitation caused by a meltwater event in the North Atlantic |
title_fullStr |
Possible changes of δ 18 O in precipitation caused by a meltwater event in the North Atlantic |
title_full_unstemmed |
Possible changes of δ 18 O in precipitation caused by a meltwater event in the North Atlantic |
title_sort |
possible changes of δ 18 o in precipitation caused by a meltwater event in the north atlantic |
publishDate |
2000 |
url |
http://hdl.handle.net/11858/00-001M-0000-000E-CD47-2 http://hdl.handle.net/11858/00-001M-0000-000E-CD46-4 |
genre |
North Atlantic |
genre_facet |
North Atlantic |
op_source |
Journal of Geophysical Research: Atmospheres |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1029/1999JD901196 http://hdl.handle.net/11858/00-001M-0000-000E-CD47-2 http://hdl.handle.net/11858/00-001M-0000-000E-CD46-4 |
op_doi |
https://doi.org/10.1029/1999JD901196 |
container_title |
Journal of Geophysical Research: Atmospheres |
container_volume |
105 |
container_issue |
D8 |
container_start_page |
10161 |
op_container_end_page |
10167 |
_version_ |
1775353007203942400 |