Warming of Atlantic Water in two west Spitsbergen fjords over the last century (1912-2009)
The recently observed warming of west Spitsbergen fjords has led to anomalous sea-ice conditions and has implications for the marine ecosystem. We investigated long-term trends of maximum temperature of Atlantic Water (AW) in two west Spitsbergen fjords. The data set is composed of more than 400 oce...
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Norwegian Polar Institute
2015
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Online Access: | https://hdl.handle.net/1956/10055 https://doi.org/10.3402/polar.v32i0.11206 |
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ftunivbergen:oai:bora.uib.no:1956/10055 2023-05-15T16:55:56+02:00 Warming of Atlantic Water in two west Spitsbergen fjords over the last century (1912-2009) Pavlov, Alexey K. Tverberg, Vigdis Ivanov, Boris Nilsen, Frank Falk-Petersen, Stig Granskog, Mats A. 2015-06-25T08:49:28Z application/pdf https://hdl.handle.net/1956/10055 https://doi.org/10.3402/polar.v32i0.11206 eng eng Norwegian Polar Institute Co-Action Publishing urn:issn:0800-0395 https://hdl.handle.net/1956/10055 https://doi.org/10.3402/polar.v32i0.11206 cristin:1039373 Copyright 2013 A.K. Pavlov et al. http://creativecommons.org/licenses/by-nc/3.0/ 11206 Polar Research 32 Temperature West Spitsbergen Current Atlantic water ERA reanalysis warming Svalbard Peer reviewed Journal article 2015 ftunivbergen https://doi.org/10.3402/polar.v32i0.11206 2023-03-14T17:38:54Z The recently observed warming of west Spitsbergen fjords has led to anomalous sea-ice conditions and has implications for the marine ecosystem. We investigated long-term trends of maximum temperature of Atlantic Water (AW) in two west Spitsbergen fjords. The data set is composed of more than 400 oceanographic stations for Isfjorden and Grønfjorden (78.1°N), spanning from 1876 to 2009. Trends throughout the last century (1912–2009) indicate an increase of 1.9°C and 2.1°C in the maximum temperature during autumn for Isfjorden and Grønfjorden, respectively. A recent warming event in the beginning of the 21st century is found to be more than 1°C higher than the second warmest period in the time series. Mean sea-level pressure (MSLP) data from ERA-40 and ERA-Interim data sets produced by the European Centre for Medium-Range Weather Forecasts and mean temperature in the core of the West Spitsbergen Current (WSC) at the Sørkapp Section along 76.3°N were used to explain the variability of the maximum temperature. A correlation analysis confirmed previous findings, showing that variability in the oceanography of the fjords can be explained mainly by two external factors: AW temperature variability in the WSC and regional patterns of the wind stress field. To take both processes into consideration, a multiple regression model accounting for temperature in the WSC core and MSLP over the area was developed. The predicted time series shows a reasonable agreement with observed maxima temperature in Isfjorden for the period 1977–2009 (N=24), with a statistically significant multiple correlation coefficient of 0.60 (R2=0.36) at P<0.05. publishedVersion Article in Journal/Newspaper Isfjord* Isfjord* Isfjorden Isfjorden Polar Research Sea ice Svalbard Spitsbergen University of Bergen: Bergen Open Research Archive (BORA-UiB) Svalbard Polar Research 32 1 11206 |
institution |
Open Polar |
collection |
University of Bergen: Bergen Open Research Archive (BORA-UiB) |
op_collection_id |
ftunivbergen |
language |
English |
topic |
Temperature West Spitsbergen Current Atlantic water ERA reanalysis warming Svalbard |
spellingShingle |
Temperature West Spitsbergen Current Atlantic water ERA reanalysis warming Svalbard Pavlov, Alexey K. Tverberg, Vigdis Ivanov, Boris Nilsen, Frank Falk-Petersen, Stig Granskog, Mats A. Warming of Atlantic Water in two west Spitsbergen fjords over the last century (1912-2009) |
topic_facet |
Temperature West Spitsbergen Current Atlantic water ERA reanalysis warming Svalbard |
description |
The recently observed warming of west Spitsbergen fjords has led to anomalous sea-ice conditions and has implications for the marine ecosystem. We investigated long-term trends of maximum temperature of Atlantic Water (AW) in two west Spitsbergen fjords. The data set is composed of more than 400 oceanographic stations for Isfjorden and Grønfjorden (78.1°N), spanning from 1876 to 2009. Trends throughout the last century (1912–2009) indicate an increase of 1.9°C and 2.1°C in the maximum temperature during autumn for Isfjorden and Grønfjorden, respectively. A recent warming event in the beginning of the 21st century is found to be more than 1°C higher than the second warmest period in the time series. Mean sea-level pressure (MSLP) data from ERA-40 and ERA-Interim data sets produced by the European Centre for Medium-Range Weather Forecasts and mean temperature in the core of the West Spitsbergen Current (WSC) at the Sørkapp Section along 76.3°N were used to explain the variability of the maximum temperature. A correlation analysis confirmed previous findings, showing that variability in the oceanography of the fjords can be explained mainly by two external factors: AW temperature variability in the WSC and regional patterns of the wind stress field. To take both processes into consideration, a multiple regression model accounting for temperature in the WSC core and MSLP over the area was developed. The predicted time series shows a reasonable agreement with observed maxima temperature in Isfjorden for the period 1977–2009 (N=24), with a statistically significant multiple correlation coefficient of 0.60 (R2=0.36) at P<0.05. publishedVersion |
format |
Article in Journal/Newspaper |
author |
Pavlov, Alexey K. Tverberg, Vigdis Ivanov, Boris Nilsen, Frank Falk-Petersen, Stig Granskog, Mats A. |
author_facet |
Pavlov, Alexey K. Tverberg, Vigdis Ivanov, Boris Nilsen, Frank Falk-Petersen, Stig Granskog, Mats A. |
author_sort |
Pavlov, Alexey K. |
title |
Warming of Atlantic Water in two west Spitsbergen fjords over the last century (1912-2009) |
title_short |
Warming of Atlantic Water in two west Spitsbergen fjords over the last century (1912-2009) |
title_full |
Warming of Atlantic Water in two west Spitsbergen fjords over the last century (1912-2009) |
title_fullStr |
Warming of Atlantic Water in two west Spitsbergen fjords over the last century (1912-2009) |
title_full_unstemmed |
Warming of Atlantic Water in two west Spitsbergen fjords over the last century (1912-2009) |
title_sort |
warming of atlantic water in two west spitsbergen fjords over the last century (1912-2009) |
publisher |
Norwegian Polar Institute |
publishDate |
2015 |
url |
https://hdl.handle.net/1956/10055 https://doi.org/10.3402/polar.v32i0.11206 |
geographic |
Svalbard |
geographic_facet |
Svalbard |
genre |
Isfjord* Isfjord* Isfjorden Isfjorden Polar Research Sea ice Svalbard Spitsbergen |
genre_facet |
Isfjord* Isfjord* Isfjorden Isfjorden Polar Research Sea ice Svalbard Spitsbergen |
op_source |
11206 Polar Research 32 |
op_relation |
urn:issn:0800-0395 https://hdl.handle.net/1956/10055 https://doi.org/10.3402/polar.v32i0.11206 cristin:1039373 |
op_rights |
Copyright 2013 A.K. Pavlov et al. http://creativecommons.org/licenses/by-nc/3.0/ |
op_doi |
https://doi.org/10.3402/polar.v32i0.11206 |
container_title |
Polar Research |
container_volume |
32 |
container_issue |
1 |
container_start_page |
11206 |
_version_ |
1766046970404667392 |