Loading…
Onset and withdrawal of the large‐scale South Asian monsoon: A dynamical definition using change point detection
We introduce an objective definition for onset and withdrawal of the South Asian summer monsoon (SASM), based on the large‐scale atmospheric moisture budget. The change point (CHP) index allows precise characterization of the different stages and timescales of the large‐scale SASM and is highly corr...
Saved in:
| Published in: | Geophysical research letters 2016-11, Vol.43 (22), p.11,815-11,822 |
|---|---|
| Main Authors: | , |
| Format: | Article |
| Language: | English |
| Subjects: | |
| Citations: | Items that this one cites Items that cite this one |
| Online Access: | Get full text |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| cited_by | cdi_FETCH-LOGICAL-c4383-a1d708a4007a4e71245942be3dc1e148c8056d4660d9f51dd8ecbb502e7b4e063 |
|---|---|
| cites | cdi_FETCH-LOGICAL-c4383-a1d708a4007a4e71245942be3dc1e148c8056d4660d9f51dd8ecbb502e7b4e063 |
| container_end_page | 11,822 |
| container_issue | 22 |
| container_start_page | 11,815 |
| container_title | Geophysical research letters |
| container_volume | 43 |
| creator | Walker, Jennifer M. Bordoni, Simona |
| description | We introduce an objective definition for onset and withdrawal of the South Asian summer monsoon (SASM), based on the large‐scale atmospheric moisture budget. The change point (CHP) index allows precise characterization of the different stages and timescales of the large‐scale SASM and is highly correlated with the local operational index, the monsoon onset over Kerala. The CHP‐based onset and withdrawal dates, which capture the expected seasonal transitions in rainfall and winds, correspond with regime changes in the SASM moisture budget between negative and positive net precipitation. Climatological composites reveal that the seasonal transitions in SASM sector mean precipitation and circulation closely resemble those of the zonal mean Hadley circulation. The CHP index at grid points within the SASM domain yields a robust definition of local onset and withdrawal dates, which are well correlated with the large‐scale index on interannual timescales, providing insight into the regional variability of the SASM.
Key Points
Change point detection allows precise characterization of monsoon seasonal evolution and timescales
Transition between negative and positive net precipitation at onset and retreat
Index provides insight into relationship between local and large‐scale monsoon timing |
| doi_str_mv | 10.1002/2016GL071026 |
| format | article |
| fullrecord | <record><control><sourceid>proquest_cross</sourceid><recordid>TN_cdi_proquest_miscellaneous_1864547079</recordid><sourceformat>XML</sourceformat><sourcesystem>PC</sourcesystem><sourcerecordid>1912988285</sourcerecordid><originalsourceid>FETCH-LOGICAL-c4383-a1d708a4007a4e71245942be3dc1e148c8056d4660d9f51dd8ecbb502e7b4e063</originalsourceid><addsrcrecordid>eNqN0c1qGzEQB3BRGqib9NYHEPTSQ53OaPW1vZmQOgFDoB_nRV7N2gpryZV2Mb71EfqMfZKscQ-lh9DTDMyPYYY_Y28RrhFAfBSAerkCgyD0CzbDWsq5BTAv2Qygnnph9Cv2upRHAKigwhnLD7HQwF30_BCGrc_u4HqeOj5sifcub-j3z1-ldT3xr2kctnxRgot8l2JJKX7iC-6P0e3CJLinLsQwhBT5WELc8Hbr4ob4PoU4TNOB2tPwil10ri_05k-9ZN8_3367uZuvHpb3N4vVvJWVreYOvQHr5HS_k2RQSFVLsabKt0gobWtBaS-1Bl93Cr231K7XCgSZtSTQ1SV7f967z-nHSGVodqG01PcuUhpLg1ZLJQ2Y-j-oUmCEMjjRd__QxzTmOD3SYI2itlZY9ayy0lpELU-7PpxVm1Mpmbpmn8PO5WOD0JwSbf5OdOLizA-hp-Oztll-WSklRFU9AfUAoKo</addsrcrecordid><sourcetype>Aggregation Database</sourcetype><iscdi>true</iscdi><recordtype>article</recordtype><pqid>1848811641</pqid></control><display><type>article</type><title>Onset and withdrawal of the large‐scale South Asian monsoon: A dynamical definition using change point detection</title><source>Wiley-Blackwell AGU Digital Archive</source><creator>Walker, Jennifer M. ; Bordoni, Simona</creator><creatorcontrib>Walker, Jennifer M. ; Bordoni, Simona</creatorcontrib><description>We introduce an objective definition for onset and withdrawal of the South Asian summer monsoon (SASM), based on the large‐scale atmospheric moisture budget. The change point (CHP) index allows precise characterization of the different stages and timescales of the large‐scale SASM and is highly correlated with the local operational index, the monsoon onset over Kerala. The CHP‐based onset and withdrawal dates, which capture the expected seasonal transitions in rainfall and winds, correspond with regime changes in the SASM moisture budget between negative and positive net precipitation. Climatological composites reveal that the seasonal transitions in SASM sector mean precipitation and circulation closely resemble those of the zonal mean Hadley circulation. The CHP index at grid points within the SASM domain yields a robust definition of local onset and withdrawal dates, which are well correlated with the large‐scale index on interannual timescales, providing insight into the regional variability of the SASM.
Key Points
Change point detection allows precise characterization of monsoon seasonal evolution and timescales
Transition between negative and positive net precipitation at onset and retreat
Index provides insight into relationship between local and large‐scale monsoon timing</description><identifier>ISSN: 0094-8276</identifier><identifier>EISSN: 1944-8007</identifier><identifier>DOI: 10.1002/2016GL071026</identifier><language>eng</language><publisher>Washington: John Wiley & Sons, Inc</publisher><subject>Asian ; Atmospheric moisture ; Atmospheric precipitations ; Budgeting ; CHP ; Circulation ; Climatology ; Correlation ; Detection ; Hadley circulation ; Mean precipitation ; Meteorology ; Moisture ; Moisture budget ; monsoon ; Monsoon onset ; Monsoons ; onset ; Precipitation ; Precipitation (meteorology) ; Rain ; Rainfall ; Robustness ; South Asian monsoon ; Spatial variations ; Summer ; Summer monsoon ; Time ; Variability ; Wind ; Winds</subject><ispartof>Geophysical research letters, 2016-11, Vol.43 (22), p.11,815-11,822</ispartof><rights>2016. American Geophysical Union. All Rights Reserved.</rights><lds50>peer_reviewed</lds50><oa>free_for_read</oa><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c4383-a1d708a4007a4e71245942be3dc1e148c8056d4660d9f51dd8ecbb502e7b4e063</citedby><cites>FETCH-LOGICAL-c4383-a1d708a4007a4e71245942be3dc1e148c8056d4660d9f51dd8ecbb502e7b4e063</cites><orcidid>0000-0003-4771-3350 ; 0000-0002-1709-0888</orcidid></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktopdf>$$Uhttps://onlinelibrary.wiley.com/doi/pdf/10.1002%2F2016GL071026$$EPDF$$P50$$Gwiley$$H</linktopdf><linktohtml>$$Uhttps://onlinelibrary.wiley.com/doi/full/10.1002%2F2016GL071026$$EHTML$$P50$$Gwiley$$H</linktohtml><link.rule.ids>314,780,784,11514,27924,27925,46468,46892</link.rule.ids></links><search><creatorcontrib>Walker, Jennifer M.</creatorcontrib><creatorcontrib>Bordoni, Simona</creatorcontrib><title>Onset and withdrawal of the large‐scale South Asian monsoon: A dynamical definition using change point detection</title><title>Geophysical research letters</title><description>We introduce an objective definition for onset and withdrawal of the South Asian summer monsoon (SASM), based on the large‐scale atmospheric moisture budget. The change point (CHP) index allows precise characterization of the different stages and timescales of the large‐scale SASM and is highly correlated with the local operational index, the monsoon onset over Kerala. The CHP‐based onset and withdrawal dates, which capture the expected seasonal transitions in rainfall and winds, correspond with regime changes in the SASM moisture budget between negative and positive net precipitation. Climatological composites reveal that the seasonal transitions in SASM sector mean precipitation and circulation closely resemble those of the zonal mean Hadley circulation. The CHP index at grid points within the SASM domain yields a robust definition of local onset and withdrawal dates, which are well correlated with the large‐scale index on interannual timescales, providing insight into the regional variability of the SASM.
Key Points
Change point detection allows precise characterization of monsoon seasonal evolution and timescales
Transition between negative and positive net precipitation at onset and retreat
Index provides insight into relationship between local and large‐scale monsoon timing</description><subject>Asian</subject><subject>Atmospheric moisture</subject><subject>Atmospheric precipitations</subject><subject>Budgeting</subject><subject>CHP</subject><subject>Circulation</subject><subject>Climatology</subject><subject>Correlation</subject><subject>Detection</subject><subject>Hadley circulation</subject><subject>Mean precipitation</subject><subject>Meteorology</subject><subject>Moisture</subject><subject>Moisture budget</subject><subject>monsoon</subject><subject>Monsoon onset</subject><subject>Monsoons</subject><subject>onset</subject><subject>Precipitation</subject><subject>Precipitation (meteorology)</subject><subject>Rain</subject><subject>Rainfall</subject><subject>Robustness</subject><subject>South Asian monsoon</subject><subject>Spatial variations</subject><subject>Summer</subject><subject>Summer monsoon</subject><subject>Time</subject><subject>Variability</subject><subject>Wind</subject><subject>Winds</subject><issn>0094-8276</issn><issn>1944-8007</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2016</creationdate><recordtype>article</recordtype><recordid>eNqN0c1qGzEQB3BRGqib9NYHEPTSQ53OaPW1vZmQOgFDoB_nRV7N2gpryZV2Mb71EfqMfZKscQ-lh9DTDMyPYYY_Y28RrhFAfBSAerkCgyD0CzbDWsq5BTAv2Qygnnph9Cv2upRHAKigwhnLD7HQwF30_BCGrc_u4HqeOj5sifcub-j3z1-ldT3xr2kctnxRgot8l2JJKX7iC-6P0e3CJLinLsQwhBT5WELc8Hbr4ob4PoU4TNOB2tPwil10ri_05k-9ZN8_3367uZuvHpb3N4vVvJWVreYOvQHr5HS_k2RQSFVLsabKt0gobWtBaS-1Bl93Cr231K7XCgSZtSTQ1SV7f967z-nHSGVodqG01PcuUhpLg1ZLJQ2Y-j-oUmCEMjjRd__QxzTmOD3SYI2itlZY9ayy0lpELU-7PpxVm1Mpmbpmn8PO5WOD0JwSbf5OdOLizA-hp-Oztll-WSklRFU9AfUAoKo</recordid><startdate>20161128</startdate><enddate>20161128</enddate><creator>Walker, Jennifer M.</creator><creator>Bordoni, Simona</creator><general>John Wiley & Sons, Inc</general><scope>AAYXX</scope><scope>CITATION</scope><scope>7TG</scope><scope>7TN</scope><scope>8FD</scope><scope>F1W</scope><scope>FR3</scope><scope>H8D</scope><scope>H96</scope><scope>KL.</scope><scope>KR7</scope><scope>L.G</scope><scope>L7M</scope><orcidid>https://orcid.org/0000-0003-4771-3350</orcidid><orcidid>https://orcid.org/0000-0002-1709-0888</orcidid></search><sort><creationdate>20161128</creationdate><title>Onset and withdrawal of the large‐scale South Asian monsoon: A dynamical definition using change point detection</title><author>Walker, Jennifer M. ; Bordoni, Simona</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c4383-a1d708a4007a4e71245942be3dc1e148c8056d4660d9f51dd8ecbb502e7b4e063</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2016</creationdate><topic>Asian</topic><topic>Atmospheric moisture</topic><topic>Atmospheric precipitations</topic><topic>Budgeting</topic><topic>CHP</topic><topic>Circulation</topic><topic>Climatology</topic><topic>Correlation</topic><topic>Detection</topic><topic>Hadley circulation</topic><topic>Mean precipitation</topic><topic>Meteorology</topic><topic>Moisture</topic><topic>Moisture budget</topic><topic>monsoon</topic><topic>Monsoon onset</topic><topic>Monsoons</topic><topic>onset</topic><topic>Precipitation</topic><topic>Precipitation (meteorology)</topic><topic>Rain</topic><topic>Rainfall</topic><topic>Robustness</topic><topic>South Asian monsoon</topic><topic>Spatial variations</topic><topic>Summer</topic><topic>Summer monsoon</topic><topic>Time</topic><topic>Variability</topic><topic>Wind</topic><topic>Winds</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Walker, Jennifer M.</creatorcontrib><creatorcontrib>Bordoni, Simona</creatorcontrib><collection>CrossRef</collection><collection>Meteorological & Geoastrophysical Abstracts</collection><collection>Oceanic Abstracts</collection><collection>Technology Research Database</collection><collection>ASFA: Aquatic Sciences and Fisheries Abstracts</collection><collection>Engineering Research Database</collection><collection>Aerospace Database</collection><collection>Aquatic Science & Fisheries Abstracts (ASFA) 2: Ocean Technology, Policy & Non-Living Resources</collection><collection>Meteorological & Geoastrophysical Abstracts - Academic</collection><collection>Civil Engineering Abstracts</collection><collection>Aquatic Science & Fisheries Abstracts (ASFA) Professional</collection><collection>Advanced Technologies Database with Aerospace</collection><jtitle>Geophysical research letters</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Walker, Jennifer M.</au><au>Bordoni, Simona</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Onset and withdrawal of the large‐scale South Asian monsoon: A dynamical definition using change point detection</atitle><jtitle>Geophysical research letters</jtitle><date>2016-11-28</date><risdate>2016</risdate><volume>43</volume><issue>22</issue><spage>11,815</spage><epage>11,822</epage><pages>11,815-11,822</pages><issn>0094-8276</issn><eissn>1944-8007</eissn><abstract>We introduce an objective definition for onset and withdrawal of the South Asian summer monsoon (SASM), based on the large‐scale atmospheric moisture budget. The change point (CHP) index allows precise characterization of the different stages and timescales of the large‐scale SASM and is highly correlated with the local operational index, the monsoon onset over Kerala. The CHP‐based onset and withdrawal dates, which capture the expected seasonal transitions in rainfall and winds, correspond with regime changes in the SASM moisture budget between negative and positive net precipitation. Climatological composites reveal that the seasonal transitions in SASM sector mean precipitation and circulation closely resemble those of the zonal mean Hadley circulation. The CHP index at grid points within the SASM domain yields a robust definition of local onset and withdrawal dates, which are well correlated with the large‐scale index on interannual timescales, providing insight into the regional variability of the SASM.
Key Points
Change point detection allows precise characterization of monsoon seasonal evolution and timescales
Transition between negative and positive net precipitation at onset and retreat
Index provides insight into relationship between local and large‐scale monsoon timing</abstract><cop>Washington</cop><pub>John Wiley & Sons, Inc</pub><doi>10.1002/2016GL071026</doi><tpages>8</tpages><orcidid>https://orcid.org/0000-0003-4771-3350</orcidid><orcidid>https://orcid.org/0000-0002-1709-0888</orcidid><oa>free_for_read</oa></addata></record> |
| fulltext | fulltext |
| identifier | ISSN: 0094-8276 |
| ispartof | Geophysical research letters, 2016-11, Vol.43 (22), p.11,815-11,822 |
| issn | 0094-8276 1944-8007 |
| language | eng |
| recordid | cdi_proquest_miscellaneous_1864547079 |
| source | Wiley-Blackwell AGU Digital Archive |
| subjects | Asian Atmospheric moisture Atmospheric precipitations Budgeting CHP Circulation Climatology Correlation Detection Hadley circulation Mean precipitation Meteorology Moisture Moisture budget monsoon Monsoon onset Monsoons onset Precipitation Precipitation (meteorology) Rain Rainfall Robustness South Asian monsoon Spatial variations Summer Summer monsoon Time Variability Wind Winds |
| title | Onset and withdrawal of the large‐scale South Asian monsoon: A dynamical definition using change point detection |
| url | http://sfxeu10.hosted.exlibrisgroup.com/loughborough?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&ctx_tim=2025-01-07T22%3A17%3A40IST&url_ver=Z39.88-2004&url_ctx_fmt=infofi/fmt:kev:mtx:ctx&rfr_id=info:sid/primo.exlibrisgroup.com:primo3-Article-proquest_cross&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.atitle=Onset%20and%20withdrawal%20of%20the%20large%E2%80%90scale%20South%20Asian%20monsoon:%20A%20dynamical%20definition%20using%20change%20point%20detection&rft.jtitle=Geophysical%20research%20letters&rft.au=Walker,%20Jennifer%20M.&rft.date=2016-11-28&rft.volume=43&rft.issue=22&rft.spage=11,815&rft.epage=11,822&rft.pages=11,815-11,822&rft.issn=0094-8276&rft.eissn=1944-8007&rft_id=info:doi/10.1002/2016GL071026&rft_dat=%3Cproquest_cross%3E1912988285%3C/proquest_cross%3E%3Cgrp_id%3Ecdi_FETCH-LOGICAL-c4383-a1d708a4007a4e71245942be3dc1e148c8056d4660d9f51dd8ecbb502e7b4e063%3C/grp_id%3E%3Coa%3E%3C/oa%3E%3Curl%3E%3C/url%3E&rft_id=info:oai/&rft_pqid=1848811641&rft_id=info:pmid/&rfr_iscdi=true |