Causal Evidence that Rotational Moisture Advection is Critical to the Superparameterized Madden–Julian Oscillation
The authors investigate the hypothesis that horizontal moisture advection is critical to the eastward propagation of the MaddenJulian oscillation (MJO). Consistent diagnostic evidence has been found in recent MJO-permitting global models viewed from the moisture-mode dynamical paradigm. To test this...
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| Veröffentlicht in: | Journal of the atmospheric sciences 2014-02, Vol.71 (2), p.800-815 |
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| container_title | Journal of the atmospheric sciences |
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| creator | Pritchard, Michael S Bretherton, Christopher S |
| description | The authors investigate the hypothesis that horizontal moisture advection is critical to the eastward propagation of the MaddenJulian oscillation (MJO). Consistent diagnostic evidence has been found in recent MJO-permitting global models viewed from the moisture-mode dynamical paradigm. To test this idea in a causal sense, tropical moisture advection by vorticity anomalies is artificially modulated in a superparameterized global model known to produce a realistic MJO signal. Boosting horizontal moisture advection by tropical vorticity anomalies accelerates and amplifies the simulated MJO in tandem with reduced environmental gross moist stability. Limiting rotational horizontal moisture advection shuts the MJO down. These sensitivities are robust in that they are nearly monotonic with respect to the control parameter and emerge despite basic-state sensitivities favoring the opposite response. Speedup confirms what several diagnostic lines of evidence already suggestthat anomalous moisture advection is fundamental to MJO propagation. The rotational component is shown to be especially critical. Amplification further suggests it may play a role in adiabatically maintaining the MJO. |
| doi_str_mv | 10.1175/JAS-D-13-0119.1 |
| format | Article |
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Consistent diagnostic evidence has been found in recent MJO-permitting global models viewed from the moisture-mode dynamical paradigm. To test this idea in a causal sense, tropical moisture advection by vorticity anomalies is artificially modulated in a superparameterized global model known to produce a realistic MJO signal. Boosting horizontal moisture advection by tropical vorticity anomalies accelerates and amplifies the simulated MJO in tandem with reduced environmental gross moist stability. Limiting rotational horizontal moisture advection shuts the MJO down. These sensitivities are robust in that they are nearly monotonic with respect to the control parameter and emerge despite basic-state sensitivities favoring the opposite response. Speedup confirms what several diagnostic lines of evidence already suggestthat anomalous moisture advection is fundamental to MJO propagation. The rotational component is shown to be especially critical. Amplification further suggests it may play a role in adiabatically maintaining the MJO.</description><identifier>ISSN: 0022-4928</identifier><identifier>EISSN: 1520-0469</identifier><identifier>DOI: 10.1175/JAS-D-13-0119.1</identifier><identifier>CODEN: JAHSAK</identifier><language>eng</language><publisher>Boston: American Meteorological Society</publisher><subject>Advection ; Amplification ; Anomalies ; Diagnostic systems ; Horizontal ; Mathematical models ; Meteorology ; Moisture ; Precipitation ; Propagation ; Rotational ; Vorticity</subject><ispartof>Journal of the atmospheric sciences, 2014-02, Vol.71 (2), p.800-815</ispartof><rights>Copyright American Meteorological Society Feb 2014</rights><lds50>peer_reviewed</lds50><oa>free_for_read</oa><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c376t-c7677464bc5c6b26d594c30b67b3504f9716d460429109034132e8b257f74f013</citedby><cites>FETCH-LOGICAL-c376t-c7677464bc5c6b26d594c30b67b3504f9716d460429109034132e8b257f74f013</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></links><search><creatorcontrib>Pritchard, Michael S</creatorcontrib><creatorcontrib>Bretherton, Christopher S</creatorcontrib><title>Causal Evidence that Rotational Moisture Advection is Critical to the Superparameterized Madden–Julian Oscillation</title><title>Journal of the atmospheric sciences</title><description>The authors investigate the hypothesis that horizontal moisture advection is critical to the eastward propagation of the MaddenJulian oscillation (MJO). Consistent diagnostic evidence has been found in recent MJO-permitting global models viewed from the moisture-mode dynamical paradigm. To test this idea in a causal sense, tropical moisture advection by vorticity anomalies is artificially modulated in a superparameterized global model known to produce a realistic MJO signal. Boosting horizontal moisture advection by tropical vorticity anomalies accelerates and amplifies the simulated MJO in tandem with reduced environmental gross moist stability. Limiting rotational horizontal moisture advection shuts the MJO down. These sensitivities are robust in that they are nearly monotonic with respect to the control parameter and emerge despite basic-state sensitivities favoring the opposite response. Speedup confirms what several diagnostic lines of evidence already suggestthat anomalous moisture advection is fundamental to MJO propagation. The rotational component is shown to be especially critical. Amplification further suggests it may play a role in adiabatically maintaining the MJO.</description><subject>Advection</subject><subject>Amplification</subject><subject>Anomalies</subject><subject>Diagnostic systems</subject><subject>Horizontal</subject><subject>Mathematical models</subject><subject>Meteorology</subject><subject>Moisture</subject><subject>Precipitation</subject><subject>Propagation</subject><subject>Rotational</subject><subject>Vorticity</subject><issn>0022-4928</issn><issn>1520-0469</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2014</creationdate><recordtype>article</recordtype><sourceid>8G5</sourceid><sourceid>BEC</sourceid><sourceid>BENPR</sourceid><sourceid>GUQSH</sourceid><sourceid>M2O</sourceid><recordid>eNqFkT1PwzAQhi0EEuVjZrXEwhLqsx07GavyraJKFGbLcRxhlCbFdpBg4j_wD_kluC0TC7e80t1zr073InQC5BxA5uO7ySK7yIBlBKA8hx00gpySjHBR7qIRIZRmvKTFPjoI4YWkohJGKE71EHSLL99cbTtjcXzWET_0UUfXd2lw37sQB2_xpH6zZt3ELuCpd9GZNI592rB4MaysX2mvlzZa7z5sje91nRy_P7_uhtbpDs-DcW27sT1Ce41ugz3-1UP0dHX5OL3JZvPr2-lklhkmRcyMFFJywSuTG1FRUeclN4xUQlYsJ7wpJYiaC8JpCaQkjAOjtqhoLhvJGwLsEJ1tfVe-fx1siGrpgrHpis72Q1AgOKWSCsb_R3NCZMGgEAk9_YO-9INPv9pQTAia8zU13lLG9yF426iVd0vt3xUQtQ5MpcDUhQKm1oEl_QHQvoiA</recordid><startdate>20140201</startdate><enddate>20140201</enddate><creator>Pritchard, Michael S</creator><creator>Bretherton, Christopher S</creator><general>American Meteorological Society</general><scope>AAYXX</scope><scope>CITATION</scope><scope>3V.</scope><scope>7TG</scope><scope>7TN</scope><scope>7UA</scope><scope>7XB</scope><scope>88F</scope><scope>88I</scope><scope>8AF</scope><scope>8FD</scope><scope>8FE</scope><scope>8FG</scope><scope>8FK</scope><scope>8G5</scope><scope>ABUWG</scope><scope>AEUYN</scope><scope>AFKRA</scope><scope>ARAPS</scope><scope>ATCPS</scope><scope>AZQEC</scope><scope>BEC</scope><scope>BENPR</scope><scope>BGLVJ</scope><scope>BHPHI</scope><scope>BKSAR</scope><scope>C1K</scope><scope>CCPQU</scope><scope>DWQXO</scope><scope>F1W</scope><scope>GNUQQ</scope><scope>GUQSH</scope><scope>H8D</scope><scope>H96</scope><scope>HCIFZ</scope><scope>KL.</scope><scope>L.G</scope><scope>L7M</scope><scope>M1Q</scope><scope>M2O</scope><scope>M2P</scope><scope>MBDVC</scope><scope>P5Z</scope><scope>P62</scope><scope>PATMY</scope><scope>PCBAR</scope><scope>PQEST</scope><scope>PQQKQ</scope><scope>PQUKI</scope><scope>PRINS</scope><scope>PYCSY</scope><scope>Q9U</scope><scope>R05</scope><scope>S0X</scope></search><sort><creationdate>20140201</creationdate><title>Causal Evidence that Rotational Moisture Advection is Critical to the Superparameterized Madden–Julian Oscillation</title><author>Pritchard, Michael S ; Bretherton, Christopher S</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c376t-c7677464bc5c6b26d594c30b67b3504f9716d460429109034132e8b257f74f013</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2014</creationdate><topic>Advection</topic><topic>Amplification</topic><topic>Anomalies</topic><topic>Diagnostic systems</topic><topic>Horizontal</topic><topic>Mathematical models</topic><topic>Meteorology</topic><topic>Moisture</topic><topic>Precipitation</topic><topic>Propagation</topic><topic>Rotational</topic><topic>Vorticity</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Pritchard, Michael S</creatorcontrib><creatorcontrib>Bretherton, Christopher S</creatorcontrib><collection>CrossRef</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>STEM Database</collection><collection>Technology Research Database</collection><collection>ProQuest SciTech Collection</collection><collection>ProQuest Technology Collection</collection><collection>ProQuest Central (Alumni) (purchase pre-March 2016)</collection><collection>Research Library (Alumni Edition)</collection><collection>ProQuest Central (Alumni Edition)</collection><collection>ProQuest One Sustainability</collection><collection>ProQuest Central UK/Ireland</collection><collection>Advanced Technologies & Aerospace Collection</collection><collection>Agricultural & Environmental Science Collection</collection><collection>ProQuest Central Essentials</collection><collection>eLibrary</collection><collection>ProQuest Central</collection><collection>Technology Collection</collection><collection>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>Research Library Prep</collection><collection>Aerospace Database</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>Advanced Technologies Database with Aerospace</collection><collection>Military Database</collection><collection>Research Library</collection><collection>Science Database</collection><collection>Research Library (Corporate)</collection><collection>Advanced Technologies & Aerospace Database</collection><collection>ProQuest Advanced Technologies & Aerospace Collection</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>ProQuest Central China</collection><collection>Environmental Science Collection</collection><collection>ProQuest Central Basic</collection><collection>University of Michigan</collection><collection>SIRS Editorial</collection><jtitle>Journal of the atmospheric sciences</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Pritchard, Michael S</au><au>Bretherton, Christopher S</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Causal Evidence that Rotational Moisture Advection is Critical to the Superparameterized Madden–Julian Oscillation</atitle><jtitle>Journal of the atmospheric sciences</jtitle><date>2014-02-01</date><risdate>2014</risdate><volume>71</volume><issue>2</issue><spage>800</spage><epage>815</epage><pages>800-815</pages><issn>0022-4928</issn><eissn>1520-0469</eissn><coden>JAHSAK</coden><abstract>The authors investigate the hypothesis that horizontal moisture advection is critical to the eastward propagation of the MaddenJulian oscillation (MJO). Consistent diagnostic evidence has been found in recent MJO-permitting global models viewed from the moisture-mode dynamical paradigm. To test this idea in a causal sense, tropical moisture advection by vorticity anomalies is artificially modulated in a superparameterized global model known to produce a realistic MJO signal. Boosting horizontal moisture advection by tropical vorticity anomalies accelerates and amplifies the simulated MJO in tandem with reduced environmental gross moist stability. Limiting rotational horizontal moisture advection shuts the MJO down. These sensitivities are robust in that they are nearly monotonic with respect to the control parameter and emerge despite basic-state sensitivities favoring the opposite response. Speedup confirms what several diagnostic lines of evidence already suggestthat anomalous moisture advection is fundamental to MJO propagation. The rotational component is shown to be especially critical. Amplification further suggests it may play a role in adiabatically maintaining the MJO.</abstract><cop>Boston</cop><pub>American Meteorological Society</pub><doi>10.1175/JAS-D-13-0119.1</doi><tpages>16</tpages><oa>free_for_read</oa></addata></record> |
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| source | American Meteorological Society; EZB-FREE-00999 freely available EZB journals; Alma/SFX Local Collection |
| subjects | Advection Amplification Anomalies Diagnostic systems Horizontal Mathematical models Meteorology Moisture Precipitation Propagation Rotational Vorticity |
| title | Causal Evidence that Rotational Moisture Advection is Critical to the Superparameterized Madden–Julian Oscillation |
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