Asymmetry in the dominant co-variation mode of boreal summer monsoon rainfall regulated by the ENSO evolution
Interannual variability of boreal summer monsoon (BSM) rainfall exhibits a prominent co-variation mode, which affects the regions with the highest population density in the world. The mode intensity depends on the rainfall variation over the western North Pacific (WNP) and the North America (NAM) mo...
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| Veröffentlicht in: | Climate dynamics 2019-11, Vol.53 (9-10), p.6379-6396 |
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| description | Interannual variability of boreal summer monsoon (BSM) rainfall exhibits a prominent co-variation mode, which affects the regions with the highest population density in the world. The mode intensity depends on the rainfall variation over the western North Pacific (WNP) and the North America (NAM) monsoon regions. This study suggests that relative importance of the WNP and NAM rainfall anomalies is asymmetric between the strong positive (SP) and strong negative (SN) phases of this mode, which can be attributed to the distinct seasonal evolution of ENSO events. In the SP-phase, the suppressed summer rainfall over the WNP determines the mode following a decaying El Niño event. When the tropical Indian Ocean (TIO) warms and the eastern Equatorial Pacific (EEP) cools, the emanating Kelvin wave- and zonal SST difference-induced low-level WNP anticyclone thus gets enhanced to damp the local rainfall, which further affects the other members of the BSM. However, the SN-phase of this mode, showing closer association with anomalous NAM rainfall, appears with a developing El Niño event. The tropical North Atlantic (TNA) becomes colder from spring to summer, when the EEP warms due to the zonal circulation anomalies. A stronger zonal SST difference between the warm EEP and cold TNA suppresses the NAM rainfall by strengthening the low-level anticyclone in situ. Such asymmetry in different phases of the BSM co-variation mode is validated by the pre-industrial control runs in a state-of-the-art CGCM, indicating the roles of ENSO evolution in regulating the interaction between the BSM members. |
| doi_str_mv | 10.1007/s00382-019-04933-8 |
| format | Article |
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The mode intensity depends on the rainfall variation over the western North Pacific (WNP) and the North America (NAM) monsoon regions. This study suggests that relative importance of the WNP and NAM rainfall anomalies is asymmetric between the strong positive (SP) and strong negative (SN) phases of this mode, which can be attributed to the distinct seasonal evolution of ENSO events. In the SP-phase, the suppressed summer rainfall over the WNP determines the mode following a decaying El Niño event. When the tropical Indian Ocean (TIO) warms and the eastern Equatorial Pacific (EEP) cools, the emanating Kelvin wave- and zonal SST difference-induced low-level WNP anticyclone thus gets enhanced to damp the local rainfall, which further affects the other members of the BSM. However, the SN-phase of this mode, showing closer association with anomalous NAM rainfall, appears with a developing El Niño event. The tropical North Atlantic (TNA) becomes colder from spring to summer, when the EEP warms due to the zonal circulation anomalies. A stronger zonal SST difference between the warm EEP and cold TNA suppresses the NAM rainfall by strengthening the low-level anticyclone in situ. Such asymmetry in different phases of the BSM co-variation mode is validated by the pre-industrial control runs in a state-of-the-art CGCM, indicating the roles of ENSO evolution in regulating the interaction between the BSM members.</description><identifier>ISSN: 0930-7575</identifier><identifier>EISSN: 1432-0894</identifier><identifier>DOI: 10.1007/s00382-019-04933-8</identifier><language>eng</language><publisher>Berlin/Heidelberg: Springer Berlin Heidelberg</publisher><subject>Annual variations ; Anomalies ; Anticyclones ; Asymmetry ; Circulation anomalies ; Climatology ; Earth and Environmental Science ; Earth Sciences ; El Nino ; El Nino events ; El Nino phenomena ; El Nino-Southern Oscillation event ; El Nino-Southern Oscillation event-rainfall relationships ; Evolution ; Geophysics/Geodesy ; Interannual variability ; Kelvin waves ; Monsoon rainfall ; Monsoon rainfall anomalies ; Monsoons ; Ocean currents ; Oceanography ; Population density ; Precipitation variability ; Rain ; Rain and rainfall ; Rainfall ; Regions ; Sea surface ; Southern Oscillation ; Summer ; Summer monsoon ; Summer rainfall ; Surface temperature ; Tropical climate ; Variation ; Wind ; Zonal flow (meteorology)</subject><ispartof>Climate dynamics, 2019-11, Vol.53 (9-10), p.6379-6396</ispartof><rights>Springer-Verlag GmbH Germany, part of Springer Nature 2019</rights><rights>COPYRIGHT 2019 Springer</rights><rights>Climate Dynamics is a copyright of Springer, (2019). All Rights Reserved.</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c423t-511e8d980a2a6934039273297c6cd26d6793eb4e26d307722a214c2c52a6dbb3</citedby><cites>FETCH-LOGICAL-c423t-511e8d980a2a6934039273297c6cd26d6793eb4e26d307722a214c2c52a6dbb3</cites><orcidid>0000-0002-3663-4481</orcidid></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktopdf>$$Uhttps://link.springer.com/content/pdf/10.1007/s00382-019-04933-8$$EPDF$$P50$$Gspringer$$H</linktopdf><linktohtml>$$Uhttps://link.springer.com/10.1007/s00382-019-04933-8$$EHTML$$P50$$Gspringer$$H</linktohtml><link.rule.ids>314,776,780,27903,27904,41467,42536,51297</link.rule.ids></links><search><creatorcontrib>Hao, Yuqian</creatorcontrib><creatorcontrib>Liu, Boqi</creatorcontrib><creatorcontrib>Zhu, Congwen</creatorcontrib><creatorcontrib>He, Bian</creatorcontrib><title>Asymmetry in the dominant co-variation mode of boreal summer monsoon rainfall regulated by the ENSO evolution</title><title>Climate dynamics</title><addtitle>Clim Dyn</addtitle><description>Interannual variability of boreal summer monsoon (BSM) rainfall exhibits a prominent co-variation mode, which affects the regions with the highest population density in the world. The mode intensity depends on the rainfall variation over the western North Pacific (WNP) and the North America (NAM) monsoon regions. This study suggests that relative importance of the WNP and NAM rainfall anomalies is asymmetric between the strong positive (SP) and strong negative (SN) phases of this mode, which can be attributed to the distinct seasonal evolution of ENSO events. In the SP-phase, the suppressed summer rainfall over the WNP determines the mode following a decaying El Niño event. When the tropical Indian Ocean (TIO) warms and the eastern Equatorial Pacific (EEP) cools, the emanating Kelvin wave- and zonal SST difference-induced low-level WNP anticyclone thus gets enhanced to damp the local rainfall, which further affects the other members of the BSM. However, the SN-phase of this mode, showing closer association with anomalous NAM rainfall, appears with a developing El Niño event. The tropical North Atlantic (TNA) becomes colder from spring to summer, when the EEP warms due to the zonal circulation anomalies. A stronger zonal SST difference between the warm EEP and cold TNA suppresses the NAM rainfall by strengthening the low-level anticyclone in situ. Such asymmetry in different phases of the BSM co-variation mode is validated by the pre-industrial control runs in a state-of-the-art CGCM, indicating the roles of ENSO evolution in regulating the interaction between the BSM members.</description><subject>Annual variations</subject><subject>Anomalies</subject><subject>Anticyclones</subject><subject>Asymmetry</subject><subject>Circulation anomalies</subject><subject>Climatology</subject><subject>Earth and Environmental Science</subject><subject>Earth Sciences</subject><subject>El Nino</subject><subject>El Nino events</subject><subject>El Nino phenomena</subject><subject>El Nino-Southern Oscillation event</subject><subject>El Nino-Southern Oscillation event-rainfall relationships</subject><subject>Evolution</subject><subject>Geophysics/Geodesy</subject><subject>Interannual variability</subject><subject>Kelvin waves</subject><subject>Monsoon rainfall</subject><subject>Monsoon rainfall anomalies</subject><subject>Monsoons</subject><subject>Ocean currents</subject><subject>Oceanography</subject><subject>Population density</subject><subject>Precipitation variability</subject><subject>Rain</subject><subject>Rain and rainfall</subject><subject>Rainfall</subject><subject>Regions</subject><subject>Sea surface</subject><subject>Southern Oscillation</subject><subject>Summer</subject><subject>Summer monsoon</subject><subject>Summer rainfall</subject><subject>Surface temperature</subject><subject>Tropical climate</subject><subject>Variation</subject><subject>Wind</subject><subject>Zonal flow (meteorology)</subject><issn>0930-7575</issn><issn>1432-0894</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2019</creationdate><recordtype>article</recordtype><sourceid>ABUWG</sourceid><sourceid>AFKRA</sourceid><sourceid>AZQEC</sourceid><sourceid>BENPR</sourceid><sourceid>CCPQU</sourceid><sourceid>DWQXO</sourceid><sourceid>GNUQQ</sourceid><recordid>eNp9kU9r3DAQxUVpodttv0BPgkKhB6ejP7as4xLSNhASaHIXsjy762BLqSSH7LevNg40eyk6SIx-7w0zj5DPDM4YgPqeAETLK2C6AqmFqNo3ZMWkKKVWy7dkBVpApWpVvycfUroHYLJRfEWmTTpME-Z4oIOneY-0D9Pgrc_UherRxsHmIXg6hR5p2NIuRLQjTXMRxVL1KZTfaAe_teNII-7m0WbsaXd4dru4vr2h-BjG-WjzkbwrWMJPL_ea3P24uDv_VV3d_Lw831xVTnKRq5oxbHvdguW20UKC0FwJrpVrXM-bvlFaYCexPAUoxbnlTDru6oL3XSfW5Mti-xDDnxlTNvdhjr50NJwrWddalX2sydlC7eyIpgwQcrSunB6nwQWP26HUNw0I1gIXbRF8OxEUJuNT3tk5JXN5-_uU_fqK3Zed5X162UI6BfkCuhhSirg1D3GYbDwYBuaYrVmyNSVb85ytOYrEIkoF9juM_wb8j-ovtwik7w</recordid><startdate>20191101</startdate><enddate>20191101</enddate><creator>Hao, Yuqian</creator><creator>Liu, Boqi</creator><creator>Zhu, Congwen</creator><creator>He, Bian</creator><general>Springer Berlin Heidelberg</general><general>Springer</general><general>Springer Nature B.V</general><scope>AAYXX</scope><scope>CITATION</scope><scope>ISR</scope><scope>3V.</scope><scope>7TG</scope><scope>7TN</scope><scope>7UA</scope><scope>7XB</scope><scope>88F</scope><scope>88I</scope><scope>8FK</scope><scope>ABUWG</scope><scope>AEUYN</scope><scope>AFKRA</scope><scope>ATCPS</scope><scope>AZQEC</scope><scope>BENPR</scope><scope>BHPHI</scope><scope>BKSAR</scope><scope>C1K</scope><scope>CCPQU</scope><scope>DWQXO</scope><scope>F1W</scope><scope>GNUQQ</scope><scope>H96</scope><scope>HCIFZ</scope><scope>KL.</scope><scope>L.G</scope><scope>M1Q</scope><scope>M2P</scope><scope>PATMY</scope><scope>PCBAR</scope><scope>PQEST</scope><scope>PQQKQ</scope><scope>PQUKI</scope><scope>PYCSY</scope><scope>Q9U</scope><orcidid>https://orcid.org/0000-0002-3663-4481</orcidid></search><sort><creationdate>20191101</creationdate><title>Asymmetry in the dominant co-variation mode of boreal summer monsoon rainfall regulated by the ENSO evolution</title><author>Hao, Yuqian ; Liu, Boqi ; Zhu, Congwen ; He, Bian</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c423t-511e8d980a2a6934039273297c6cd26d6793eb4e26d307722a214c2c52a6dbb3</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2019</creationdate><topic>Annual variations</topic><topic>Anomalies</topic><topic>Anticyclones</topic><topic>Asymmetry</topic><topic>Circulation anomalies</topic><topic>Climatology</topic><topic>Earth and Environmental Science</topic><topic>Earth Sciences</topic><topic>El Nino</topic><topic>El Nino events</topic><topic>El Nino phenomena</topic><topic>El Nino-Southern Oscillation event</topic><topic>El Nino-Southern Oscillation event-rainfall relationships</topic><topic>Evolution</topic><topic>Geophysics/Geodesy</topic><topic>Interannual variability</topic><topic>Kelvin waves</topic><topic>Monsoon rainfall</topic><topic>Monsoon rainfall anomalies</topic><topic>Monsoons</topic><topic>Ocean currents</topic><topic>Oceanography</topic><topic>Population density</topic><topic>Precipitation variability</topic><topic>Rain</topic><topic>Rain and rainfall</topic><topic>Rainfall</topic><topic>Regions</topic><topic>Sea surface</topic><topic>Southern Oscillation</topic><topic>Summer</topic><topic>Summer monsoon</topic><topic>Summer rainfall</topic><topic>Surface temperature</topic><topic>Tropical climate</topic><topic>Variation</topic><topic>Wind</topic><topic>Zonal flow (meteorology)</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Hao, Yuqian</creatorcontrib><creatorcontrib>Liu, Boqi</creatorcontrib><creatorcontrib>Zhu, Congwen</creatorcontrib><creatorcontrib>He, Bian</creatorcontrib><collection>CrossRef</collection><collection>Gale In Context: Science</collection><collection>ProQuest Central (Corporate)</collection><collection>Meteorological & Geoastrophysical Abstracts</collection><collection>Oceanic Abstracts</collection><collection>Water Resources Abstracts</collection><collection>ProQuest Central (purchase pre-March 2016)</collection><collection>Military Database (Alumni Edition)</collection><collection>Science Database (Alumni Edition)</collection><collection>ProQuest Central (Alumni) (purchase pre-March 2016)</collection><collection>ProQuest Central (Alumni)</collection><collection>ProQuest One Sustainability</collection><collection>ProQuest Central UK/Ireland</collection><collection>Agricultural & Environmental Science Collection</collection><collection>ProQuest Central Essentials</collection><collection>ProQuest Central</collection><collection>ProQuest Natural Science Collection</collection><collection>Earth, Atmospheric & Aquatic Science Collection</collection><collection>Environmental Sciences and Pollution Management</collection><collection>ProQuest One Community College</collection><collection>ProQuest Central Korea</collection><collection>ASFA: Aquatic Sciences and Fisheries Abstracts</collection><collection>ProQuest Central Student</collection><collection>Aquatic Science & Fisheries Abstracts (ASFA) 2: Ocean Technology, Policy & Non-Living Resources</collection><collection>SciTech Premium Collection</collection><collection>Meteorological & Geoastrophysical Abstracts - Academic</collection><collection>Aquatic Science & Fisheries Abstracts (ASFA) Professional</collection><collection>ProQuest Military Database</collection><collection>ProQuest Science Journals</collection><collection>Environmental Science Database</collection><collection>Earth, Atmospheric & Aquatic Science Database</collection><collection>ProQuest One Academic Eastern Edition (DO NOT USE)</collection><collection>ProQuest One Academic</collection><collection>ProQuest One Academic UKI Edition</collection><collection>Environmental Science Collection</collection><collection>ProQuest Central Basic</collection><jtitle>Climate dynamics</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Hao, Yuqian</au><au>Liu, Boqi</au><au>Zhu, Congwen</au><au>He, Bian</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Asymmetry in the dominant co-variation mode of boreal summer monsoon rainfall regulated by the ENSO evolution</atitle><jtitle>Climate dynamics</jtitle><stitle>Clim Dyn</stitle><date>2019-11-01</date><risdate>2019</risdate><volume>53</volume><issue>9-10</issue><spage>6379</spage><epage>6396</epage><pages>6379-6396</pages><issn>0930-7575</issn><eissn>1432-0894</eissn><abstract>Interannual variability of boreal summer monsoon (BSM) rainfall exhibits a prominent co-variation mode, which affects the regions with the highest population density in the world. The mode intensity depends on the rainfall variation over the western North Pacific (WNP) and the North America (NAM) monsoon regions. This study suggests that relative importance of the WNP and NAM rainfall anomalies is asymmetric between the strong positive (SP) and strong negative (SN) phases of this mode, which can be attributed to the distinct seasonal evolution of ENSO events. In the SP-phase, the suppressed summer rainfall over the WNP determines the mode following a decaying El Niño event. When the tropical Indian Ocean (TIO) warms and the eastern Equatorial Pacific (EEP) cools, the emanating Kelvin wave- and zonal SST difference-induced low-level WNP anticyclone thus gets enhanced to damp the local rainfall, which further affects the other members of the BSM. However, the SN-phase of this mode, showing closer association with anomalous NAM rainfall, appears with a developing El Niño event. The tropical North Atlantic (TNA) becomes colder from spring to summer, when the EEP warms due to the zonal circulation anomalies. A stronger zonal SST difference between the warm EEP and cold TNA suppresses the NAM rainfall by strengthening the low-level anticyclone in situ. Such asymmetry in different phases of the BSM co-variation mode is validated by the pre-industrial control runs in a state-of-the-art CGCM, indicating the roles of ENSO evolution in regulating the interaction between the BSM members.</abstract><cop>Berlin/Heidelberg</cop><pub>Springer Berlin Heidelberg</pub><doi>10.1007/s00382-019-04933-8</doi><tpages>18</tpages><orcidid>https://orcid.org/0000-0002-3663-4481</orcidid></addata></record> |
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| subjects | Annual variations Anomalies Anticyclones Asymmetry Circulation anomalies Climatology Earth and Environmental Science Earth Sciences El Nino El Nino events El Nino phenomena El Nino-Southern Oscillation event El Nino-Southern Oscillation event-rainfall relationships Evolution Geophysics/Geodesy Interannual variability Kelvin waves Monsoon rainfall Monsoon rainfall anomalies Monsoons Ocean currents Oceanography Population density Precipitation variability Rain Rain and rainfall Rainfall Regions Sea surface Southern Oscillation Summer Summer monsoon Summer rainfall Surface temperature Tropical climate Variation Wind Zonal flow (meteorology) |
| title | Asymmetry in the dominant co-variation mode of boreal summer monsoon rainfall regulated by the ENSO evolution |
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