Isentropic Analysis of Convective Motions
This paper analyzes the convective mass transport by sorting air parcels in terms of their equivalent potential temperature to determine an isentropic streamfunction. By averaging the vertical mass flux at a constant value of the equivalent potential temperature, one can compute an isentropic mass t...
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| Veröffentlicht in: | Journal of the atmospheric sciences 2013-11, Vol.70 (11), p.3673-3688 |
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| container_title | Journal of the atmospheric sciences |
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| creator | PAULUIS, Olivier M MROWIEC, Agnieszka A |
| description | This paper analyzes the convective mass transport by sorting air parcels in terms of their equivalent potential temperature to determine an isentropic streamfunction. By averaging the vertical mass flux at a constant value of the equivalent potential temperature, one can compute an isentropic mass transport that filters out reversible oscillatory motions such as gravity waves. This novel approach emphasizes the fact that the vertical energy and entropy transports by convection are due to the combination of ascending air parcels with high energy and entropy and subsiding air parcels with lower energy and entropy. Such conditional averaging can be extended to other dynamic and thermodynamic variables such as vertical velocity, temperature, or relative humidity to obtain a comprehensive description of convective motions. It is also shown how this approach can be used to determine the mean diabatic tendencies from the three-dimensional dynamic and thermodynamic fields. |
| doi_str_mv | 10.1175/JAS-D-12-0205.1 |
| format | Article |
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By averaging the vertical mass flux at a constant value of the equivalent potential temperature, one can compute an isentropic mass transport that filters out reversible oscillatory motions such as gravity waves. This novel approach emphasizes the fact that the vertical energy and entropy transports by convection are due to the combination of ascending air parcels with high energy and entropy and subsiding air parcels with lower energy and entropy. Such conditional averaging can be extended to other dynamic and thermodynamic variables such as vertical velocity, temperature, or relative humidity to obtain a comprehensive description of convective motions. It is also shown how this approach can be used to determine the mean diabatic tendencies from the three-dimensional dynamic and thermodynamic fields.</description><identifier>ISSN: 0022-4928</identifier><identifier>EISSN: 1520-0469</identifier><identifier>DOI: 10.1175/JAS-D-12-0205.1</identifier><identifier>CODEN: JAHSAK</identifier><language>eng</language><publisher>Boston, MA: American Meteorological Society</publisher><subject>Air ; Air parcels ; Air temperature ; Analytical methods ; Approximation ; Atmosphere ; Convection ; Downdraft ; Dynamics ; Earth, ocean, space ; Electromagnetic wave filters ; Energy ; Entropy ; Equilibrium ; Equivalence ; Equivalent potential temperature ; Exact sciences and technology ; External geophysics ; Geometry ; Gravity ; Gravity waves ; Heat ; Mass flux ; Mass transport ; Mathematical analysis ; Mathematical models ; Meteorology ; Oscillations ; Parcels ; Phase transitions ; Physics of the high neutral atmosphere ; Potential temperature ; Relative humidity ; Rivers ; Thermodynamic fields ; Thermodynamics ; Transport ; Updraft ; Vertical velocities</subject><ispartof>Journal of the atmospheric sciences, 2013-11, Vol.70 (11), p.3673-3688</ispartof><rights>2014 INIST-CNRS</rights><rights>Copyright American Meteorological Society Nov 2013</rights><rights>Copyright American Meteorological Society 2013</rights><lds50>peer_reviewed</lds50><oa>free_for_read</oa><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c434t-a763c682e788a079cb58f20c8552fbd6732f18c72f0482139d1407d49be4a3e83</citedby><cites>FETCH-LOGICAL-c434t-a763c682e788a079cb58f20c8552fbd6732f18c72f0482139d1407d49be4a3e83</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><link.rule.ids>314,778,782,3670,27907,27908</link.rule.ids><backlink>$$Uhttp://pascal-francis.inist.fr/vibad/index.php?action=getRecordDetail&idt=27900786$$DView record in Pascal Francis$$Hfree_for_read</backlink></links><search><creatorcontrib>PAULUIS, Olivier M</creatorcontrib><creatorcontrib>MROWIEC, Agnieszka A</creatorcontrib><title>Isentropic Analysis of Convective Motions</title><title>Journal of the atmospheric sciences</title><description>This paper analyzes the convective mass transport by sorting air parcels in terms of their equivalent potential temperature to determine an isentropic streamfunction. By averaging the vertical mass flux at a constant value of the equivalent potential temperature, one can compute an isentropic mass transport that filters out reversible oscillatory motions such as gravity waves. This novel approach emphasizes the fact that the vertical energy and entropy transports by convection are due to the combination of ascending air parcels with high energy and entropy and subsiding air parcels with lower energy and entropy. Such conditional averaging can be extended to other dynamic and thermodynamic variables such as vertical velocity, temperature, or relative humidity to obtain a comprehensive description of convective motions. It is also shown how this approach can be used to determine the mean diabatic tendencies from the three-dimensional dynamic and thermodynamic fields.</description><subject>Air</subject><subject>Air parcels</subject><subject>Air temperature</subject><subject>Analytical methods</subject><subject>Approximation</subject><subject>Atmosphere</subject><subject>Convection</subject><subject>Downdraft</subject><subject>Dynamics</subject><subject>Earth, ocean, space</subject><subject>Electromagnetic wave filters</subject><subject>Energy</subject><subject>Entropy</subject><subject>Equilibrium</subject><subject>Equivalence</subject><subject>Equivalent potential temperature</subject><subject>Exact sciences and technology</subject><subject>External geophysics</subject><subject>Geometry</subject><subject>Gravity</subject><subject>Gravity waves</subject><subject>Heat</subject><subject>Mass flux</subject><subject>Mass transport</subject><subject>Mathematical analysis</subject><subject>Mathematical models</subject><subject>Meteorology</subject><subject>Oscillations</subject><subject>Parcels</subject><subject>Phase transitions</subject><subject>Physics of the high neutral atmosphere</subject><subject>Potential temperature</subject><subject>Relative humidity</subject><subject>Rivers</subject><subject>Thermodynamic fields</subject><subject>Thermodynamics</subject><subject>Transport</subject><subject>Updraft</subject><subject>Vertical 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Analysis of Convective Motions</title><author>PAULUIS, Olivier M ; MROWIEC, Agnieszka A</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c434t-a763c682e788a079cb58f20c8552fbd6732f18c72f0482139d1407d49be4a3e83</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2013</creationdate><topic>Air</topic><topic>Air parcels</topic><topic>Air temperature</topic><topic>Analytical methods</topic><topic>Approximation</topic><topic>Atmosphere</topic><topic>Convection</topic><topic>Downdraft</topic><topic>Dynamics</topic><topic>Earth, ocean, space</topic><topic>Electromagnetic wave filters</topic><topic>Energy</topic><topic>Entropy</topic><topic>Equilibrium</topic><topic>Equivalence</topic><topic>Equivalent potential temperature</topic><topic>Exact sciences and technology</topic><topic>External geophysics</topic><topic>Geometry</topic><topic>Gravity</topic><topic>Gravity waves</topic><topic>Heat</topic><topic>Mass flux</topic><topic>Mass transport</topic><topic>Mathematical analysis</topic><topic>Mathematical models</topic><topic>Meteorology</topic><topic>Oscillations</topic><topic>Parcels</topic><topic>Phase transitions</topic><topic>Physics of the high neutral atmosphere</topic><topic>Potential temperature</topic><topic>Relative humidity</topic><topic>Rivers</topic><topic>Thermodynamic fields</topic><topic>Thermodynamics</topic><topic>Transport</topic><topic>Updraft</topic><topic>Vertical velocities</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>PAULUIS, Olivier M</creatorcontrib><creatorcontrib>MROWIEC, Agnieszka A</creatorcontrib><collection>Pascal-Francis</collection><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 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By averaging the vertical mass flux at a constant value of the equivalent potential temperature, one can compute an isentropic mass transport that filters out reversible oscillatory motions such as gravity waves. This novel approach emphasizes the fact that the vertical energy and entropy transports by convection are due to the combination of ascending air parcels with high energy and entropy and subsiding air parcels with lower energy and entropy. Such conditional averaging can be extended to other dynamic and thermodynamic variables such as vertical velocity, temperature, or relative humidity to obtain a comprehensive description of convective motions. It is also shown how this approach can be used to determine the mean diabatic tendencies from the three-dimensional dynamic and thermodynamic fields.</abstract><cop>Boston, MA</cop><pub>American Meteorological Society</pub><doi>10.1175/JAS-D-12-0205.1</doi><tpages>16</tpages><oa>free_for_read</oa></addata></record> |
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| ispartof | Journal of the atmospheric sciences, 2013-11, Vol.70 (11), p.3673-3688 |
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| source | American Meteorological Society; Elektronische Zeitschriftenbibliothek - Frei zugängliche E-Journals; Alma/SFX Local Collection |
| subjects | Air Air parcels Air temperature Analytical methods Approximation Atmosphere Convection Downdraft Dynamics Earth, ocean, space Electromagnetic wave filters Energy Entropy Equilibrium Equivalence Equivalent potential temperature Exact sciences and technology External geophysics Geometry Gravity Gravity waves Heat Mass flux Mass transport Mathematical analysis Mathematical models Meteorology Oscillations Parcels Phase transitions Physics of the high neutral atmosphere Potential temperature Relative humidity Rivers Thermodynamic fields Thermodynamics Transport Updraft Vertical velocities |
| title | Isentropic Analysis of Convective Motions |
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