Interannual-decadal variability of wintertime mixed layer depths in the North Pacific detected by an ensemble of ocean syntheses
The interannual-decadal variability of the wintertime mixed layer depths (MLDs) over the North Pacific is investigated from an empirical orthogonal function (EOF) analysis of an ensemble of global ocean reanalyses. The first leading EOF mode represents the interannual MLD anomalies centered in the e...
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Online Access: | http://hdl.handle.net/2122/11770 https://doi.org/10.1007/s00382-015-2762-3 |
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ftingv:oai:www.earth-prints.org:2122/11770 2023-05-15T13:15:04+02:00 Interannual-decadal variability of wintertime mixed layer depths in the North Pacific detected by an ensemble of ocean syntheses Toyoda, Takahiro Fujii, Yosuke Kuragano, Tsurane Kosugi, Naohiro Sasano, Daisuke Kamachi, Masafumi Ishikawa, Yoichi Masuda, Shuhei Sato, Kanako Awaji, Toshiyuki Hernandez, Fabrice Ferry, Nicolas Guinehut, Stéphanie Martin, Matthew Peterson, Andrew K. Good, Simon A. Valdivieso, Maria Haines, Keith Storto, Andrea Masina, Simona Köhl, Armin Yin, Yonghong Shi, Li Alves, Oscar Smith, Gregory Chang, You-Soon Vernieres, Guillaume Wang, Xiaochun Forget, Gael Heimbach, Patrick Wang, Ou Fukumori, Ichiro Lee, Tong Zuo, Hao Balmaseda, Magdalena #PLACEHOLDER_PARENT_METADATA_VALUE# Istituto Nazionale di Geofisica e Vulcanologia (INGV), Sezione Bologna, Bologna, Italia 2017-08 http://hdl.handle.net/2122/11770 https://doi.org/10.1007/s00382-015-2762-3 en eng Climate Dynamics /49 (2017) http://hdl.handle.net/2122/11770 doi:10.1007/s00382-015-2762-3 restricted article 2017 ftingv https://doi.org/10.1007/s00382-015-2762-3 2022-07-29T06:07:32Z The interannual-decadal variability of the wintertime mixed layer depths (MLDs) over the North Pacific is investigated from an empirical orthogonal function (EOF) analysis of an ensemble of global ocean reanalyses. The first leading EOF mode represents the interannual MLD anomalies centered in the eastern part of the central mode water formation region in phase opposition with those in the eastern subtropics and the central Alaskan Gyre. This first EOF mode is highly correlated with the Pacific decadal oscillation index on both the interannual and decadal time scales. The second leading EOF mode represents the MLD variability in the subtropical mode water (STMW) formation region and has a good correlation with the wintertime West Pacific (WP) index with time lag of 3 years, suggesting the importance of the oceanic dynamical response to the change in the surface wind field associated with the meridional shifts of the Aleutian Low. The above MLD variabilities are in basic agreement with previous observational and modeling findings. Moreover the reanalysis ensemble provides uncertainty estimates. The interannual MLD anomalies in the first and second EOF modes are consistently represented by the individual reanalyses and the amplitudes of the variabilities generally exceed the ensemble spread of the reanalyses. Besides, the resulting MLD variability indices, spanning the 1948–2012 period, should be helpful for characterizing the North Pacific climate variability. In particular, a 6-year oscillation including the WP teleconnection pattern in the atmosphere and the oceanic MLD variability in the STMW formation region is first detected. Published 891–907 4A. Oceanografia e clima JCR Journal Article in Journal/Newspaper aleutian low Earth-Prints (Istituto Nazionale di Geofisica e Vulcanologia) Pacific Climate Dynamics 49 3 891 907 |
institution |
Open Polar |
collection |
Earth-Prints (Istituto Nazionale di Geofisica e Vulcanologia) |
op_collection_id |
ftingv |
language |
English |
description |
The interannual-decadal variability of the wintertime mixed layer depths (MLDs) over the North Pacific is investigated from an empirical orthogonal function (EOF) analysis of an ensemble of global ocean reanalyses. The first leading EOF mode represents the interannual MLD anomalies centered in the eastern part of the central mode water formation region in phase opposition with those in the eastern subtropics and the central Alaskan Gyre. This first EOF mode is highly correlated with the Pacific decadal oscillation index on both the interannual and decadal time scales. The second leading EOF mode represents the MLD variability in the subtropical mode water (STMW) formation region and has a good correlation with the wintertime West Pacific (WP) index with time lag of 3 years, suggesting the importance of the oceanic dynamical response to the change in the surface wind field associated with the meridional shifts of the Aleutian Low. The above MLD variabilities are in basic agreement with previous observational and modeling findings. Moreover the reanalysis ensemble provides uncertainty estimates. The interannual MLD anomalies in the first and second EOF modes are consistently represented by the individual reanalyses and the amplitudes of the variabilities generally exceed the ensemble spread of the reanalyses. Besides, the resulting MLD variability indices, spanning the 1948–2012 period, should be helpful for characterizing the North Pacific climate variability. In particular, a 6-year oscillation including the WP teleconnection pattern in the atmosphere and the oceanic MLD variability in the STMW formation region is first detected. Published 891–907 4A. Oceanografia e clima JCR Journal |
author2 |
#PLACEHOLDER_PARENT_METADATA_VALUE# Istituto Nazionale di Geofisica e Vulcanologia (INGV), Sezione Bologna, Bologna, Italia |
format |
Article in Journal/Newspaper |
author |
Toyoda, Takahiro Fujii, Yosuke Kuragano, Tsurane Kosugi, Naohiro Sasano, Daisuke Kamachi, Masafumi Ishikawa, Yoichi Masuda, Shuhei Sato, Kanako Awaji, Toshiyuki Hernandez, Fabrice Ferry, Nicolas Guinehut, Stéphanie Martin, Matthew Peterson, Andrew K. Good, Simon A. Valdivieso, Maria Haines, Keith Storto, Andrea Masina, Simona Köhl, Armin Yin, Yonghong Shi, Li Alves, Oscar Smith, Gregory Chang, You-Soon Vernieres, Guillaume Wang, Xiaochun Forget, Gael Heimbach, Patrick Wang, Ou Fukumori, Ichiro Lee, Tong Zuo, Hao Balmaseda, Magdalena |
spellingShingle |
Toyoda, Takahiro Fujii, Yosuke Kuragano, Tsurane Kosugi, Naohiro Sasano, Daisuke Kamachi, Masafumi Ishikawa, Yoichi Masuda, Shuhei Sato, Kanako Awaji, Toshiyuki Hernandez, Fabrice Ferry, Nicolas Guinehut, Stéphanie Martin, Matthew Peterson, Andrew K. Good, Simon A. Valdivieso, Maria Haines, Keith Storto, Andrea Masina, Simona Köhl, Armin Yin, Yonghong Shi, Li Alves, Oscar Smith, Gregory Chang, You-Soon Vernieres, Guillaume Wang, Xiaochun Forget, Gael Heimbach, Patrick Wang, Ou Fukumori, Ichiro Lee, Tong Zuo, Hao Balmaseda, Magdalena Interannual-decadal variability of wintertime mixed layer depths in the North Pacific detected by an ensemble of ocean syntheses |
author_facet |
Toyoda, Takahiro Fujii, Yosuke Kuragano, Tsurane Kosugi, Naohiro Sasano, Daisuke Kamachi, Masafumi Ishikawa, Yoichi Masuda, Shuhei Sato, Kanako Awaji, Toshiyuki Hernandez, Fabrice Ferry, Nicolas Guinehut, Stéphanie Martin, Matthew Peterson, Andrew K. Good, Simon A. Valdivieso, Maria Haines, Keith Storto, Andrea Masina, Simona Köhl, Armin Yin, Yonghong Shi, Li Alves, Oscar Smith, Gregory Chang, You-Soon Vernieres, Guillaume Wang, Xiaochun Forget, Gael Heimbach, Patrick Wang, Ou Fukumori, Ichiro Lee, Tong Zuo, Hao Balmaseda, Magdalena |
author_sort |
Toyoda, Takahiro |
title |
Interannual-decadal variability of wintertime mixed layer depths in the North Pacific detected by an ensemble of ocean syntheses |
title_short |
Interannual-decadal variability of wintertime mixed layer depths in the North Pacific detected by an ensemble of ocean syntheses |
title_full |
Interannual-decadal variability of wintertime mixed layer depths in the North Pacific detected by an ensemble of ocean syntheses |
title_fullStr |
Interannual-decadal variability of wintertime mixed layer depths in the North Pacific detected by an ensemble of ocean syntheses |
title_full_unstemmed |
Interannual-decadal variability of wintertime mixed layer depths in the North Pacific detected by an ensemble of ocean syntheses |
title_sort |
interannual-decadal variability of wintertime mixed layer depths in the north pacific detected by an ensemble of ocean syntheses |
publishDate |
2017 |
url |
http://hdl.handle.net/2122/11770 https://doi.org/10.1007/s00382-015-2762-3 |
geographic |
Pacific |
geographic_facet |
Pacific |
genre |
aleutian low |
genre_facet |
aleutian low |
op_relation |
Climate Dynamics /49 (2017) http://hdl.handle.net/2122/11770 doi:10.1007/s00382-015-2762-3 |
op_rights |
restricted |
op_doi |
https://doi.org/10.1007/s00382-015-2762-3 |
container_title |
Climate Dynamics |
container_volume |
49 |
container_issue |
3 |
container_start_page |
891 |
op_container_end_page |
907 |
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1766266776452071424 |