Simulation of Dryline Misovortex Dynamics and Cumulus Formation
A dryline and misocyclones have been simulated in a cloud-resolving model by applying specified initial and time-dependent lateral boundary conditions obtained from analyses of the 22 May 2002 International H sub(2)O Project (IHOP_2002) dataset. The initial and lateral boundary conditions were obtai...
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| Veröffentlicht in: | Monthly weather review 2012-11, Vol.140 (11), p.3525-3551 |
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| creator | BUBAN, Michael S ZIEGLER, Conrad L MANSELL, Edward R RICHARDSON, Yvette P |
| description | A dryline and misocyclones have been simulated in a cloud-resolving model by applying specified initial and time-dependent lateral boundary conditions obtained from analyses of the 22 May 2002 International H sub(2)O Project (IHOP_2002) dataset. The initial and lateral boundary conditions were obtained from a combination of the time-spaced Lagrangian analyses for temperature and moisture with horizontal velocities from multiple-Doppler wind syntheses. The simulated dryline, horizontal dry-convective rolls (HCRs) and open cells (OCCs), misocyclones, and cumulus clouds are similar to the corresponding observed features. The misocyclones move northward at nearly the mean boundary layer (BL) wind speed, rotate dryline gradients owing to their circulations, and move the local dryline eastward via their passage. Cumuli develop along a secondary dryline, along HCR and OCC segments between the primary and secondary drylines, along HCR and OCC segments that have moved over the dryline, and within the dryline updraft. After the initial shearing instability develops, misocyclogenesis proceeds from tilting and stretching of vorticity by the persistent secondary dryline circulation. The resulting misocyclone evolution is discussed. |
| doi_str_mv | 10.1175/mwr-d-11-00189.1 |
| format | Article |
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The initial and lateral boundary conditions were obtained from a combination of the time-spaced Lagrangian analyses for temperature and moisture with horizontal velocities from multiple-Doppler wind syntheses. The simulated dryline, horizontal dry-convective rolls (HCRs) and open cells (OCCs), misocyclones, and cumulus clouds are similar to the corresponding observed features. The misocyclones move northward at nearly the mean boundary layer (BL) wind speed, rotate dryline gradients owing to their circulations, and move the local dryline eastward via their passage. Cumuli develop along a secondary dryline, along HCR and OCC segments between the primary and secondary drylines, along HCR and OCC segments that have moved over the dryline, and within the dryline updraft. After the initial shearing instability develops, misocyclogenesis proceeds from tilting and stretching of vorticity by the persistent secondary dryline circulation. The resulting misocyclone evolution is discussed.</description><identifier>ISSN: 0027-0644</identifier><identifier>EISSN: 1520-0493</identifier><identifier>DOI: 10.1175/mwr-d-11-00189.1</identifier><identifier>CODEN: MWREAB</identifier><language>eng</language><publisher>Boston, MA: American Meteorological Society</publisher><subject>Atmosphere ; Boundaries ; Boundary conditions ; Boundary layers ; Circulation ; Computer simulation ; Earth, ocean, space ; Exact sciences and technology ; External geophysics ; Horizontal ; Instability ; Meteorology ; Rolls ; Segments ; Simulation ; Studies ; Vorticity ; Wind speed</subject><ispartof>Monthly weather review, 2012-11, Vol.140 (11), p.3525-3551</ispartof><rights>2015 INIST-CNRS</rights><rights>Copyright American Meteorological Society Nov 2012</rights><lds50>peer_reviewed</lds50><oa>free_for_read</oa><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c3901-9889c115463bcf8472e4a47740362f2b394c9946a3b80969683bd183de2e24183</citedby><cites>FETCH-LOGICAL-c3901-9889c115463bcf8472e4a47740362f2b394c9946a3b80969683bd183de2e24183</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><link.rule.ids>315,782,786,3683,27931,27932</link.rule.ids><backlink>$$Uhttp://pascal-francis.inist.fr/vibad/index.php?action=getRecordDetail&idt=26565108$$DView record in Pascal Francis$$Hfree_for_read</backlink></links><search><creatorcontrib>BUBAN, Michael S</creatorcontrib><creatorcontrib>ZIEGLER, Conrad L</creatorcontrib><creatorcontrib>MANSELL, Edward R</creatorcontrib><creatorcontrib>RICHARDSON, Yvette P</creatorcontrib><title>Simulation of Dryline Misovortex Dynamics and Cumulus Formation</title><title>Monthly weather review</title><description>A dryline and misocyclones have been simulated in a cloud-resolving model by applying specified initial and time-dependent lateral boundary conditions obtained from analyses of the 22 May 2002 International H sub(2)O Project (IHOP_2002) dataset. 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The initial and lateral boundary conditions were obtained from a combination of the time-spaced Lagrangian analyses for temperature and moisture with horizontal velocities from multiple-Doppler wind syntheses. The simulated dryline, horizontal dry-convective rolls (HCRs) and open cells (OCCs), misocyclones, and cumulus clouds are similar to the corresponding observed features. The misocyclones move northward at nearly the mean boundary layer (BL) wind speed, rotate dryline gradients owing to their circulations, and move the local dryline eastward via their passage. Cumuli develop along a secondary dryline, along HCR and OCC segments between the primary and secondary drylines, along HCR and OCC segments that have moved over the dryline, and within the dryline updraft. After the initial shearing instability develops, misocyclogenesis proceeds from tilting and stretching of vorticity by the persistent secondary dryline circulation. The resulting misocyclone evolution is discussed.</abstract><cop>Boston, MA</cop><pub>American Meteorological Society</pub><doi>10.1175/mwr-d-11-00189.1</doi><tpages>27</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 | Atmosphere Boundaries Boundary conditions Boundary layers Circulation Computer simulation Earth, ocean, space Exact sciences and technology External geophysics Horizontal Instability Meteorology Rolls Segments Simulation Studies Vorticity Wind speed |
| title | Simulation of Dryline Misovortex Dynamics and Cumulus Formation |
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