Influence of atmospheric internal variability on the long-term Siberian water cycle during the past 2 centuries
River discharges from Siberia are a large source of freshwater into the Arctic Ocean, whereas the cause of the long-term variation in Siberian discharges is still unclear. The observed river discharges of the Lena in the east and the Ob in the west indicated different relationships in each of the ep...
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ftnonlinearchiv:oai:noa.gwlb.de:cop_mods_00006111 2023-05-15T15:09:19+02:00 Influence of atmospheric internal variability on the long-term Siberian water cycle during the past 2 centuries Oshima, Kazuhiro Ogata, Koto Park, Hotaek Tachibana, Yoshihiro 2018-05 electronic https://doi.org/10.5194/esd-9-497-2018 https://noa.gwlb.de/receive/cop_mods_00006111 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00006068/esd-9-497-2018.pdf https://esd.copernicus.org/articles/9/497/2018/esd-9-497-2018.pdf eng eng Copernicus Publications Earth System Dynamics -- http://www.earth-syst-dynam.net/ -- http://www.bibliothek.uni-regensburg.de/ezeit/?2578793 -- 2190-4987 https://doi.org/10.5194/esd-9-497-2018 https://noa.gwlb.de/receive/cop_mods_00006111 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00006068/esd-9-497-2018.pdf https://esd.copernicus.org/articles/9/497/2018/esd-9-497-2018.pdf uneingeschränkt info:eu-repo/semantics/openAccess article Verlagsveröffentlichung article Text doc-type:article 2018 ftnonlinearchiv https://doi.org/10.5194/esd-9-497-2018 2022-02-08T22:59:09Z River discharges from Siberia are a large source of freshwater into the Arctic Ocean, whereas the cause of the long-term variation in Siberian discharges is still unclear. The observed river discharges of the Lena in the east and the Ob in the west indicated different relationships in each of the epochs during the past 7 decades. The correlations between the two river discharges were negative during the 1980s to mid-1990s, positive during the mid-1950s to 1960s, and became weak after the mid-1990s. More long-term records of tree-ring-reconstructed discharges have also shown differences in the correlations in each of the epochs. It is noteworthy that the correlations obtained from the reconstructions tend to be negative during the past 2 centuries. Such tendency has also been obtained from precipitations in observations, and in simulations with an atmospheric general circulation model (AGCM) and fully coupled atmosphere–ocean GCMs conducted for the Fourth Assessment Report of the IPCC. The AGCM control simulation further demonstrated that an east–west seesaw pattern of summertime large-scale atmospheric circulation frequently emerges over Siberia as an atmospheric internal variability. This results in an opposite anomaly of precipitation over the Lena and Ob and the negative correlation. Consequently, the summertime atmospheric internal variability in the east–west seesaw pattern over Siberia is a key factor influencing the long-term variation in precipitation and river discharge, i.e., the water cycle in this region. Article in Journal/Newspaper Arctic Arctic Ocean Siberia Niedersächsisches Online-Archiv NOA Arctic Arctic Ocean Earth System Dynamics 9 2 497 506 |
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article Verlagsveröffentlichung |
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article Verlagsveröffentlichung Oshima, Kazuhiro Ogata, Koto Park, Hotaek Tachibana, Yoshihiro Influence of atmospheric internal variability on the long-term Siberian water cycle during the past 2 centuries |
topic_facet |
article Verlagsveröffentlichung |
description |
River discharges from Siberia are a large source of freshwater into the Arctic Ocean, whereas the cause of the long-term variation in Siberian discharges is still unclear. The observed river discharges of the Lena in the east and the Ob in the west indicated different relationships in each of the epochs during the past 7 decades. The correlations between the two river discharges were negative during the 1980s to mid-1990s, positive during the mid-1950s to 1960s, and became weak after the mid-1990s. More long-term records of tree-ring-reconstructed discharges have also shown differences in the correlations in each of the epochs. It is noteworthy that the correlations obtained from the reconstructions tend to be negative during the past 2 centuries. Such tendency has also been obtained from precipitations in observations, and in simulations with an atmospheric general circulation model (AGCM) and fully coupled atmosphere–ocean GCMs conducted for the Fourth Assessment Report of the IPCC. The AGCM control simulation further demonstrated that an east–west seesaw pattern of summertime large-scale atmospheric circulation frequently emerges over Siberia as an atmospheric internal variability. This results in an opposite anomaly of precipitation over the Lena and Ob and the negative correlation. Consequently, the summertime atmospheric internal variability in the east–west seesaw pattern over Siberia is a key factor influencing the long-term variation in precipitation and river discharge, i.e., the water cycle in this region. |
format |
Article in Journal/Newspaper |
author |
Oshima, Kazuhiro Ogata, Koto Park, Hotaek Tachibana, Yoshihiro |
author_facet |
Oshima, Kazuhiro Ogata, Koto Park, Hotaek Tachibana, Yoshihiro |
author_sort |
Oshima, Kazuhiro |
title |
Influence of atmospheric internal variability on the long-term Siberian water cycle during the past 2 centuries |
title_short |
Influence of atmospheric internal variability on the long-term Siberian water cycle during the past 2 centuries |
title_full |
Influence of atmospheric internal variability on the long-term Siberian water cycle during the past 2 centuries |
title_fullStr |
Influence of atmospheric internal variability on the long-term Siberian water cycle during the past 2 centuries |
title_full_unstemmed |
Influence of atmospheric internal variability on the long-term Siberian water cycle during the past 2 centuries |
title_sort |
influence of atmospheric internal variability on the long-term siberian water cycle during the past 2 centuries |
publisher |
Copernicus Publications |
publishDate |
2018 |
url |
https://doi.org/10.5194/esd-9-497-2018 https://noa.gwlb.de/receive/cop_mods_00006111 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00006068/esd-9-497-2018.pdf https://esd.copernicus.org/articles/9/497/2018/esd-9-497-2018.pdf |
geographic |
Arctic Arctic Ocean |
geographic_facet |
Arctic Arctic Ocean |
genre |
Arctic Arctic Ocean Siberia |
genre_facet |
Arctic Arctic Ocean Siberia |
op_relation |
Earth System Dynamics -- http://www.earth-syst-dynam.net/ -- http://www.bibliothek.uni-regensburg.de/ezeit/?2578793 -- 2190-4987 https://doi.org/10.5194/esd-9-497-2018 https://noa.gwlb.de/receive/cop_mods_00006111 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00006068/esd-9-497-2018.pdf https://esd.copernicus.org/articles/9/497/2018/esd-9-497-2018.pdf |
op_rights |
uneingeschränkt info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.5194/esd-9-497-2018 |
container_title |
Earth System Dynamics |
container_volume |
9 |
container_issue |
2 |
container_start_page |
497 |
op_container_end_page |
506 |
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