Influence of climate variability on extreme ocean surface wave heights assessed from ERA-Interim and ERA-20C reanalyses
Extreme ocean surface wave heights significantly affect coastal structures and offshore activities and impact many vulnerable populations of low-lying islands. Therefore, better understanding of ocean wave height variability plays an important role in potentially reducing risk in such regions. In th...
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ftponangunivst:oai:oasis.postech.ac.kr:2014.oak/36624 2023-05-15T17:31:38+02:00 Influence of climate variability on extreme ocean surface wave heights assessed from ERA-Interim and ERA-20C reanalyses Kumar, P Min, SK Weller, E Lee, H Wang, XLL Min, SK 2016-12-13 https://oasis.postech.ac.kr/handle/2014.oak/36624 https://doi.org/10.1175/JCLI-D-15-0580.1 English eng AMER METEOROLOGICAL SOC JOURNAL OF CLIMATE Meteorology & Atmospheric Sciences 0894-8755 https://oasis.postech.ac.kr/handle/2014.oak/36624 doi:10.1175/JCLI-D-15-0580.1 18952 JOURNAL OF CLIMATE, v.29, no.11, pp.4031 - 4046 000376197900006 2-s2.0-84971474760 NORTH-ATLANTIC OSCILLATION EL-NINO ENSO TRENDS INCREASE IMPACT WIND Article ART 2016 ftponangunivst https://doi.org/10.1175/JCLI-D-15-0580.1 2022-10-20T20:22:06Z Extreme ocean surface wave heights significantly affect coastal structures and offshore activities and impact many vulnerable populations of low-lying islands. Therefore, better understanding of ocean wave height variability plays an important role in potentially reducing risk in such regions. In this study, global impacts of natural climate variability such as El Nino-Southern Oscillation (ENSO), North Atlantic Oscillation (NAO), and Pacific decadal oscillation (PDO) on extreme significant wave height (SWH) are analyzed using ERA-Interim (1980-2014) and ECMWF twentieth-century reanalysis (ERA-20C; 1952-2010) datasets for December-February (DJF). The nonstationary generalized extreme value (GEV) analysis is used to determine the influence of natural climate variability on DJF maxima of SWH (Hmax), wind speed (Wmax), and mean sea level pressure gradient amplitude (Gmax). The major ENSO influence on Hmax is found over the northeastern North Pacific (NP), with increases during El Nino and decreases during La Nina, and its counter responses are observed in coastal regions of the western NP, which are consistently observed in both Wmax and Gmax responses. The Hmax response to the PDO occurs over similar regions in the NP as those associated with ENSO but with much weaker amplitude. Composite analysis of different ENSO and PDO phase combinations reveals stronger (weaker) influences when both variability modes are of the same (opposite) phase. Furthermore, significant NAO influence on Hmax, Wmax, and Gmax is observed throughout Icelandic and Azores regions in relation to changes in atmospheric circulation patterns. Overall, the response of extreme SWH to natural climate variability modes is consistent with seasonal mean responses. 1 1 10 6 scie scopus Article in Journal/Newspaper North Atlantic North Atlantic oscillation Pohang University of Science and Technology (POSTECH): Open Access System for Information Sharing (OASIS) Pacific Journal of Climate 29 11 4031 4046 |
institution |
Open Polar |
collection |
Pohang University of Science and Technology (POSTECH): Open Access System for Information Sharing (OASIS) |
op_collection_id |
ftponangunivst |
language |
English |
topic |
NORTH-ATLANTIC OSCILLATION EL-NINO ENSO TRENDS INCREASE IMPACT WIND |
spellingShingle |
NORTH-ATLANTIC OSCILLATION EL-NINO ENSO TRENDS INCREASE IMPACT WIND Kumar, P Min, SK Weller, E Lee, H Wang, XLL Influence of climate variability on extreme ocean surface wave heights assessed from ERA-Interim and ERA-20C reanalyses |
topic_facet |
NORTH-ATLANTIC OSCILLATION EL-NINO ENSO TRENDS INCREASE IMPACT WIND |
description |
Extreme ocean surface wave heights significantly affect coastal structures and offshore activities and impact many vulnerable populations of low-lying islands. Therefore, better understanding of ocean wave height variability plays an important role in potentially reducing risk in such regions. In this study, global impacts of natural climate variability such as El Nino-Southern Oscillation (ENSO), North Atlantic Oscillation (NAO), and Pacific decadal oscillation (PDO) on extreme significant wave height (SWH) are analyzed using ERA-Interim (1980-2014) and ECMWF twentieth-century reanalysis (ERA-20C; 1952-2010) datasets for December-February (DJF). The nonstationary generalized extreme value (GEV) analysis is used to determine the influence of natural climate variability on DJF maxima of SWH (Hmax), wind speed (Wmax), and mean sea level pressure gradient amplitude (Gmax). The major ENSO influence on Hmax is found over the northeastern North Pacific (NP), with increases during El Nino and decreases during La Nina, and its counter responses are observed in coastal regions of the western NP, which are consistently observed in both Wmax and Gmax responses. The Hmax response to the PDO occurs over similar regions in the NP as those associated with ENSO but with much weaker amplitude. Composite analysis of different ENSO and PDO phase combinations reveals stronger (weaker) influences when both variability modes are of the same (opposite) phase. Furthermore, significant NAO influence on Hmax, Wmax, and Gmax is observed throughout Icelandic and Azores regions in relation to changes in atmospheric circulation patterns. Overall, the response of extreme SWH to natural climate variability modes is consistent with seasonal mean responses. 1 1 10 6 scie scopus |
author2 |
Min, SK |
format |
Article in Journal/Newspaper |
author |
Kumar, P Min, SK Weller, E Lee, H Wang, XLL |
author_facet |
Kumar, P Min, SK Weller, E Lee, H Wang, XLL |
author_sort |
Kumar, P |
title |
Influence of climate variability on extreme ocean surface wave heights assessed from ERA-Interim and ERA-20C reanalyses |
title_short |
Influence of climate variability on extreme ocean surface wave heights assessed from ERA-Interim and ERA-20C reanalyses |
title_full |
Influence of climate variability on extreme ocean surface wave heights assessed from ERA-Interim and ERA-20C reanalyses |
title_fullStr |
Influence of climate variability on extreme ocean surface wave heights assessed from ERA-Interim and ERA-20C reanalyses |
title_full_unstemmed |
Influence of climate variability on extreme ocean surface wave heights assessed from ERA-Interim and ERA-20C reanalyses |
title_sort |
influence of climate variability on extreme ocean surface wave heights assessed from era-interim and era-20c reanalyses |
publisher |
AMER METEOROLOGICAL SOC |
publishDate |
2016 |
url |
https://oasis.postech.ac.kr/handle/2014.oak/36624 https://doi.org/10.1175/JCLI-D-15-0580.1 |
geographic |
Pacific |
geographic_facet |
Pacific |
genre |
North Atlantic North Atlantic oscillation |
genre_facet |
North Atlantic North Atlantic oscillation |
op_relation |
JOURNAL OF CLIMATE Meteorology & Atmospheric Sciences 0894-8755 https://oasis.postech.ac.kr/handle/2014.oak/36624 doi:10.1175/JCLI-D-15-0580.1 18952 JOURNAL OF CLIMATE, v.29, no.11, pp.4031 - 4046 000376197900006 2-s2.0-84971474760 |
op_doi |
https://doi.org/10.1175/JCLI-D-15-0580.1 |
container_title |
Journal of Climate |
container_volume |
29 |
container_issue |
11 |
container_start_page |
4031 |
op_container_end_page |
4046 |
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1766129320489648128 |