Large-Scale Atmospheric and Oceanic Conditions during the 2011―12 DYNAMO Field Campaign
An international field campaign, Dynamics of the Madden Julian Oscillation (DYNAMO), took place in the Indian Ocean during October 2011–March 2012 to collect observations for the Madden–Julian oscillation (MJO), especially its convective initiation processes. The large-scale atmospheric and oceanic...
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description | An international field campaign, Dynamics of the Madden Julian Oscillation (DYNAMO), took place in the Indian Ocean during October 2011–March 2012 to collect observations for the Madden–Julian oscillation (MJO), especially its convective initiation processes. The large-scale atmospheric and oceanic conditions during the campaign are documented here. The ENSO and the Indian Ocean dipole (IOD) states, the monthly mean monsoon circulation and its associated precipitation, humidity, vertical and meridional/zonal overturning cells, and ocean surface currents are discussed. The evolution of MJO events is described using various fields and indices that have been used to subdivide the campaign into three periods. These periods were 1) 17 September–8 December 2011 (period 1), which featured two robust MJO events that circumnavigated the global tropics with a period of less than 45 days; 2) 9 December 2011–31 January 2012, which contained less coherent activity (period 2); and 3) 1 February–12 April 2012, a period that featured the strongest and most slowly propagating MJO event of the campaign (period 3). Activities of convectively coupled atmospheric Kelvin and equatorial Rossby (ER) waves and their interaction with the MJO are discussed. The overview of the atmospheric and oceanic variability during the field campaign raises several scientific issues pertaining to our understanding of the MJO, or lack thereof. Among others, roles of Kelvin and ER waves in MJO convective initiation, convection-circulation decoupling on the MJO scale, applications of MJO filtering methods and indices, and ocean–atmosphere coupling need further research attention. |
doi_str_mv | 10.1175/mwr-d-13-00022.1 |
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The large-scale atmospheric and oceanic conditions during the campaign are documented here. The ENSO and the Indian Ocean dipole (IOD) states, the monthly mean monsoon circulation and its associated precipitation, humidity, vertical and meridional/zonal overturning cells, and ocean surface currents are discussed. The evolution of MJO events is described using various fields and indices that have been used to subdivide the campaign into three periods. These periods were 1) 17 September–8 December 2011 (period 1), which featured two robust MJO events that circumnavigated the global tropics with a period of less than 45 days; 2) 9 December 2011–31 January 2012, which contained less coherent activity (period 2); and 3) 1 February–12 April 2012, a period that featured the strongest and most slowly propagating MJO event of the campaign (period 3). Activities of convectively coupled atmospheric Kelvin and equatorial Rossby (ER) waves and their interaction with the MJO are discussed. The overview of the atmospheric and oceanic variability during the field campaign raises several scientific issues pertaining to our understanding of the MJO, or lack thereof. Among others, roles of Kelvin and ER waves in MJO convective initiation, convection-circulation decoupling on the MJO scale, applications of MJO filtering methods and indices, and ocean–atmosphere coupling need further research attention.</description><identifier>ISSN: 0027-0644</identifier><identifier>EISSN: 1520-0493</identifier><identifier>DOI: 10.1175/mwr-d-13-00022.1</identifier><identifier>CODEN: MWREAB</identifier><language>eng</language><publisher>Boston, MA: American Meteorological Society</publisher><subject>Atmosphere ; Atmospherics ; Climate ; Convection ; Decoupling ; Dipoles ; Earth, ocean, space ; El Nino ; El Nino phenomena ; El Nino-Southern Oscillation event ; Exact sciences and technology ; External geophysics ; Filtering ; Humidity ; Indian Ocean ; Madden-Julian oscillation ; Marine ; Meteorology ; Monsoon circulation ; Monsoons ; Ocean currents ; Ocean surface ; Oceans ; Oscillations ; Precipitation ; Propagation ; Rain ; Rossby waves ; Rotating generators ; Satellites ; Southern Oscillation ; Surface currents ; Time series ; Tropical environments</subject><ispartof>Monthly weather review, 2013-12, Vol.141 (12), p.4173-4196</ispartof><rights>2015 INIST-CNRS</rights><rights>Copyright American Meteorological Society Dec 2013</rights><rights>Copyright American Meteorological Society 2013</rights><lds50>peer_reviewed</lds50><oa>free_for_read</oa><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c503t-2a4cad576ea8dafccc698e46bba644e756329a3cc0c7b1d6dd5a19f4165086c53</citedby><cites>FETCH-LOGICAL-c503t-2a4cad576ea8dafccc698e46bba644e756329a3cc0c7b1d6dd5a19f4165086c53</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><link.rule.ids>314,776,780,3668,27901,27902</link.rule.ids><backlink>$$Uhttp://pascal-francis.inist.fr/vibad/index.php?action=getRecordDetail&idt=27978001$$DView record in Pascal Francis$$Hfree_for_read</backlink></links><search><creatorcontrib>GOTTSCHALCK, Jon</creatorcontrib><creatorcontrib>ROUNDY, Paul E</creatorcontrib><creatorcontrib>SCHRECK, Carl J</creatorcontrib><creatorcontrib>VINTZILEOS, Augustin</creatorcontrib><creatorcontrib>CHIDONG ZHANG</creatorcontrib><title>Large-Scale Atmospheric and Oceanic Conditions during the 2011―12 DYNAMO Field Campaign</title><title>Monthly weather review</title><description>An international field campaign, Dynamics of the Madden Julian Oscillation (DYNAMO), took place in the Indian Ocean during October 2011–March 2012 to collect observations for the Madden–Julian oscillation (MJO), especially its convective initiation processes. The large-scale atmospheric and oceanic conditions during the campaign are documented here. The ENSO and the Indian Ocean dipole (IOD) states, the monthly mean monsoon circulation and its associated precipitation, humidity, vertical and meridional/zonal overturning cells, and ocean surface currents are discussed. The evolution of MJO events is described using various fields and indices that have been used to subdivide the campaign into three periods. These periods were 1) 17 September–8 December 2011 (period 1), which featured two robust MJO events that circumnavigated the global tropics with a period of less than 45 days; 2) 9 December 2011–31 January 2012, which contained less coherent activity (period 2); and 3) 1 February–12 April 2012, a period that featured the strongest and most slowly propagating MJO event of the campaign (period 3). Activities of convectively coupled atmospheric Kelvin and equatorial Rossby (ER) waves and their interaction with the MJO are discussed. The overview of the atmospheric and oceanic variability during the field campaign raises several scientific issues pertaining to our understanding of the MJO, or lack thereof. Among others, roles of Kelvin and ER waves in MJO convective initiation, convection-circulation decoupling on the MJO scale, applications of MJO filtering methods and indices, and ocean–atmosphere coupling need further research attention.</description><subject>Atmosphere</subject><subject>Atmospherics</subject><subject>Climate</subject><subject>Convection</subject><subject>Decoupling</subject><subject>Dipoles</subject><subject>Earth, ocean, space</subject><subject>El Nino</subject><subject>El Nino phenomena</subject><subject>El Nino-Southern Oscillation event</subject><subject>Exact sciences and technology</subject><subject>External geophysics</subject><subject>Filtering</subject><subject>Humidity</subject><subject>Indian Ocean</subject><subject>Madden-Julian oscillation</subject><subject>Marine</subject><subject>Meteorology</subject><subject>Monsoon circulation</subject><subject>Monsoons</subject><subject>Ocean currents</subject><subject>Ocean surface</subject><subject>Oceans</subject><subject>Oscillations</subject><subject>Precipitation</subject><subject>Propagation</subject><subject>Rain</subject><subject>Rossby waves</subject><subject>Rotating generators</subject><subject>Satellites</subject><subject>Southern Oscillation</subject><subject>Surface currents</subject><subject>Time series</subject><subject>Tropical 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China</collection><jtitle>Monthly weather review</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>GOTTSCHALCK, Jon</au><au>ROUNDY, Paul E</au><au>SCHRECK, Carl J</au><au>VINTZILEOS, Augustin</au><au>CHIDONG ZHANG</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Large-Scale Atmospheric and Oceanic Conditions during the 2011―12 DYNAMO Field Campaign</atitle><jtitle>Monthly weather review</jtitle><date>2013-12-01</date><risdate>2013</risdate><volume>141</volume><issue>12</issue><spage>4173</spage><epage>4196</epage><pages>4173-4196</pages><issn>0027-0644</issn><eissn>1520-0493</eissn><coden>MWREAB</coden><abstract>An international field campaign, Dynamics of the Madden Julian Oscillation (DYNAMO), took place in the Indian Ocean during October 2011–March 2012 to collect observations for the Madden–Julian oscillation (MJO), especially its convective initiation processes. The large-scale atmospheric and oceanic conditions during the campaign are documented here. The ENSO and the Indian Ocean dipole (IOD) states, the monthly mean monsoon circulation and its associated precipitation, humidity, vertical and meridional/zonal overturning cells, and ocean surface currents are discussed. The evolution of MJO events is described using various fields and indices that have been used to subdivide the campaign into three periods. These periods were 1) 17 September–8 December 2011 (period 1), which featured two robust MJO events that circumnavigated the global tropics with a period of less than 45 days; 2) 9 December 2011–31 January 2012, which contained less coherent activity (period 2); and 3) 1 February–12 April 2012, a period that featured the strongest and most slowly propagating MJO event of the campaign (period 3). Activities of convectively coupled atmospheric Kelvin and equatorial Rossby (ER) waves and their interaction with the MJO are discussed. The overview of the atmospheric and oceanic variability during the field campaign raises several scientific issues pertaining to our understanding of the MJO, or lack thereof. Among others, roles of Kelvin and ER waves in MJO convective initiation, convection-circulation decoupling on the MJO scale, applications of MJO filtering methods and indices, and ocean–atmosphere coupling need further research attention.</abstract><cop>Boston, MA</cop><pub>American Meteorological Society</pub><doi>10.1175/mwr-d-13-00022.1</doi><tpages>24</tpages><oa>free_for_read</oa></addata></record> |
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subjects | Atmosphere Atmospherics Climate Convection Decoupling Dipoles Earth, ocean, space El Nino El Nino phenomena El Nino-Southern Oscillation event Exact sciences and technology External geophysics Filtering Humidity Indian Ocean Madden-Julian oscillation Marine Meteorology Monsoon circulation Monsoons Ocean currents Ocean surface Oceans Oscillations Precipitation Propagation Rain Rossby waves Rotating generators Satellites Southern Oscillation Surface currents Time series Tropical environments |
title | Large-Scale Atmospheric and Oceanic Conditions during the 2011―12 DYNAMO Field Campaign |
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