Arctic warming - Evolution and Spreading of the 1990s warm event in the Nordic Seas and the Arctic Ocean
Observations in the Arctic Ocean have revealed changes in oceanic temperature, salinity and the ice cover of the 1990s in comparison to earlier data. With a numerical model we hindcast the coupled ice-ocean system of the Arctic and sub-Arctic seas for the past two decades to improve the scientific u...
Published in: | Journal of Geophysical Research: Oceans |
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ftawi:oai:epic.awi.de:4807 2023-09-05T13:15:41+02:00 Arctic warming - Evolution and Spreading of the 1990s warm event in the Nordic Seas and the Arctic Ocean Karcher, Michael Gerdes, Rüdiger Kauker, Frank Köberle, Cornelia 2003 application/pdf https://epic.awi.de/id/eprint/4807/ https://epic.awi.de/id/eprint/4807/1/Kar2001a.pdf https://doi.org/10.1029/2001JC001265 https://hdl.handle.net/10013/epic.15375 https://hdl.handle.net/10013/epic.15375.d001 unknown https://epic.awi.de/id/eprint/4807/1/Kar2001a.pdf https://hdl.handle.net/10013/epic.15375.d001 Karcher, M. orcid:0000-0002-9587-811X , Gerdes, R. , Kauker, F. orcid:0000-0002-7976-3005 and Köberle, C. (2003) Arctic warming - Evolution and Spreading of the 1990s warm event in the Nordic Seas and the Arctic Ocean, , Journal of Geophysical Research, Vol. 108(C2) . doi:10.1029/2001JC001265 <https://doi.org/10.1029/2001JC001265> , hdl:10013/epic.15375 EPIC3Journal of Geophysical Research, Vol. 108(C2), 3034 p. Article isiRev 2003 ftawi https://doi.org/10.1029/2001JC001265 2023-08-22T19:44:58Z Observations in the Arctic Ocean have revealed changes in oceanic temperature, salinity and the ice cover of the 1990s in comparison to earlier data. With a numerical model we hindcast the coupled ice-ocean system of the Arctic and sub-Arctic seas for the past two decades to improve the scientific understanding of their modes of response to atmospheric forcing. The model is driven by atmospheric data from the ECMWF reanalysis between 1979 a nd 1993 and from the ECMWF analysis between 1994 and 1999. The focus of the work presented here is on the temperature rise which occurred in the Atlantic layer of the Arctic Ocean in the early 1990s.The model favorably reproduces the development and subsequent propagation of temperature anomalies in the water of Atlantic origin in the Northwest European Shelf area and along the Norwegian coast. These anomalies propagate into the Arctic Ocean via the Barents Sea and the Fram Strait. Two warm anomalies are entering the Arctic Ocean through these passages between 1983 and 1985 and between 1989 and 1994, respectively. While the first smaller anomaly only warms up the western Eurasian Basin, the second large anomaly spreads far into the eastern Eurasian Basin and across the Lomonossov Ridge into the western Arctic basins.Intensified boundary currents during the high NAO state in the first half of the 1990s significantly influence amplitude and speed of the temperature anomalies inside the Arctic Ocean. In contrast to the notion of a continuos warming process during the 1990s our model results suggest the warming of the Atlantic Layer in the Arctic Ocean to happen in the form of events. The event with the largest anomalous heat input during the modeled period entered the Arctic between 1989 and 1994. It delivers an additional heat of about 30 TW to the Arctic Ocean proper compared to most of the 1980s. In the analysis of the model results it is possible to trace back this surplus of heat input to the Arctic to an increased volume inflow via the Faroer-Scotland passage and a reduced ... Article in Journal/Newspaper Arctic Arctic Arctic Ocean Barents Sea Fram Strait Nordic Seas Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) Arctic Arctic Ocean Barents Sea Journal of Geophysical Research: Oceans 108 C2 n/a n/a |
institution |
Open Polar |
collection |
Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) |
op_collection_id |
ftawi |
language |
unknown |
description |
Observations in the Arctic Ocean have revealed changes in oceanic temperature, salinity and the ice cover of the 1990s in comparison to earlier data. With a numerical model we hindcast the coupled ice-ocean system of the Arctic and sub-Arctic seas for the past two decades to improve the scientific understanding of their modes of response to atmospheric forcing. The model is driven by atmospheric data from the ECMWF reanalysis between 1979 a nd 1993 and from the ECMWF analysis between 1994 and 1999. The focus of the work presented here is on the temperature rise which occurred in the Atlantic layer of the Arctic Ocean in the early 1990s.The model favorably reproduces the development and subsequent propagation of temperature anomalies in the water of Atlantic origin in the Northwest European Shelf area and along the Norwegian coast. These anomalies propagate into the Arctic Ocean via the Barents Sea and the Fram Strait. Two warm anomalies are entering the Arctic Ocean through these passages between 1983 and 1985 and between 1989 and 1994, respectively. While the first smaller anomaly only warms up the western Eurasian Basin, the second large anomaly spreads far into the eastern Eurasian Basin and across the Lomonossov Ridge into the western Arctic basins.Intensified boundary currents during the high NAO state in the first half of the 1990s significantly influence amplitude and speed of the temperature anomalies inside the Arctic Ocean. In contrast to the notion of a continuos warming process during the 1990s our model results suggest the warming of the Atlantic Layer in the Arctic Ocean to happen in the form of events. The event with the largest anomalous heat input during the modeled period entered the Arctic between 1989 and 1994. It delivers an additional heat of about 30 TW to the Arctic Ocean proper compared to most of the 1980s. In the analysis of the model results it is possible to trace back this surplus of heat input to the Arctic to an increased volume inflow via the Faroer-Scotland passage and a reduced ... |
format |
Article in Journal/Newspaper |
author |
Karcher, Michael Gerdes, Rüdiger Kauker, Frank Köberle, Cornelia |
spellingShingle |
Karcher, Michael Gerdes, Rüdiger Kauker, Frank Köberle, Cornelia Arctic warming - Evolution and Spreading of the 1990s warm event in the Nordic Seas and the Arctic Ocean |
author_facet |
Karcher, Michael Gerdes, Rüdiger Kauker, Frank Köberle, Cornelia |
author_sort |
Karcher, Michael |
title |
Arctic warming - Evolution and Spreading of the 1990s warm event in the Nordic Seas and the Arctic Ocean |
title_short |
Arctic warming - Evolution and Spreading of the 1990s warm event in the Nordic Seas and the Arctic Ocean |
title_full |
Arctic warming - Evolution and Spreading of the 1990s warm event in the Nordic Seas and the Arctic Ocean |
title_fullStr |
Arctic warming - Evolution and Spreading of the 1990s warm event in the Nordic Seas and the Arctic Ocean |
title_full_unstemmed |
Arctic warming - Evolution and Spreading of the 1990s warm event in the Nordic Seas and the Arctic Ocean |
title_sort |
arctic warming - evolution and spreading of the 1990s warm event in the nordic seas and the arctic ocean |
publishDate |
2003 |
url |
https://epic.awi.de/id/eprint/4807/ https://epic.awi.de/id/eprint/4807/1/Kar2001a.pdf https://doi.org/10.1029/2001JC001265 https://hdl.handle.net/10013/epic.15375 https://hdl.handle.net/10013/epic.15375.d001 |
geographic |
Arctic Arctic Ocean Barents Sea |
geographic_facet |
Arctic Arctic Ocean Barents Sea |
genre |
Arctic Arctic Arctic Ocean Barents Sea Fram Strait Nordic Seas |
genre_facet |
Arctic Arctic Arctic Ocean Barents Sea Fram Strait Nordic Seas |
op_source |
EPIC3Journal of Geophysical Research, Vol. 108(C2), 3034 p. |
op_relation |
https://epic.awi.de/id/eprint/4807/1/Kar2001a.pdf https://hdl.handle.net/10013/epic.15375.d001 Karcher, M. orcid:0000-0002-9587-811X , Gerdes, R. , Kauker, F. orcid:0000-0002-7976-3005 and Köberle, C. (2003) Arctic warming - Evolution and Spreading of the 1990s warm event in the Nordic Seas and the Arctic Ocean, , Journal of Geophysical Research, Vol. 108(C2) . doi:10.1029/2001JC001265 <https://doi.org/10.1029/2001JC001265> , hdl:10013/epic.15375 |
op_doi |
https://doi.org/10.1029/2001JC001265 |
container_title |
Journal of Geophysical Research: Oceans |
container_volume |
108 |
container_issue |
C2 |
container_start_page |
n/a |
op_container_end_page |
n/a |
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1776197531957460992 |