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St.uct.re of t.underst.rm gust Front. wit. t.pographic Effect.

Advances in At.ospheric Sciences 2001年第6期18卷 1161-1174页

作者： A. A. Bidokht. and t. Bani-Hashem Inst.t.t. of Geophysics, t.hran Universit., P.O, Box 14155-6466, t.hran, LR. Iran Inst.t.t. of Geophysics Tehran University Tehran I. R. Iran

Surface met.orological observat.ons, associat.d wit. gust front. produced by t.underst.rm out.lows over t.hran, an area surrounded by mount.ins, have been analyzed. Dist.nct.ve feat.res are sudden drop in air t.mperat.re, up t. 10°C, sharp increase in wind speed, up t. 30 m s?1, wit. wind shift. t. nort.west.rly, pressure jump, up t. 4 hPa, humidit. increase, up t. 40%, and rain aft.r some 20 min. gust front. which oft.n occur in spring t.me, have a t.pical t.ickness of about.1.5 km and produce vert.cal wind shear of t.e order of 10?2s?1. Alt.ough t.ese feat.res seem t. be common for most.of t.e event., t.eir int.nsit.es differ from one event.t. anot.er, indicat.ng t.at.t.e gust front. may occur in different.sizes and shapes. Apart.from a dominant.effect.on t.e format.on of t.e original t.underst.rms, t.pography appears t. break up t.e front.l st.uct.re of t.e gust front.. t.e int.rnal Rossby radius of deformat.on for t.ese flows is small enough (～ 100 km) for rot.t.onal effect. t. be minor. A laborat.ry model of t.e gust front.(gravit. current. also shows t.at.it.init.ally has a dist.nct.ve head wit. a t.rbulent.wake, and can be broken up by t.pography. It.is shown t.at.when t.e environment.is st.at.fied, t.rbulence due t. lobes and cleft. inst.bilit.es near t.e nose of t.e current.is suppressed. When t.e ground is rough, t.ese inst.bilit.es are highly amplified and t.e int.rnal Froude number of t.e flow is reduced. t.e bot.om slope in t.e presence of rough t.pography leads t. t.e break up of t.e current.head and produces a broad and highly non-uniform head, recognized in t.e densit. signals. Key words Front.l st.uct.re - Gravit. current.- Met.orological dat. - Out.lows

关键词： Front.l st.uct.re Gravit. current Met.orological dat. Out.lows

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Assessing impact. of energy st.rage on resilience of dist.ibut.on syst.ms against.hurricanes

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Journal of Modern Power Syst.ms and Clean Energy 2019年第4期7卷 731-740页

作者： Hieu t.NGUYEN John W.MUHS Masood PARVANIA Depart.ent.of Elect.ical and Comput.r Engineering University of UtahSalt Lake CityUT 84112USA

t.is paper develops a comprehensive framework t. analyze t.e impact.of energy st.rage on improving t.e resilience of dist.ibut.on syst.ms against.*** paper first.develops a spat.o-t.mporal model of progressing hurricane when making landfall t.at.can be used t. ant.cipat. out.ge scenarios caused by t.e gust-wind *** opt.mizat.on model is t.en developed for opt.mizing t.e operat.on of dist.ibut.on syst.ms during hurricane t.at.capt.res bot. pre-out.ge and post.out.ge net.ork operat.on *** simulat.ons are performed on t.e modified IEEE 33-bus dist.ibut.on syst.m wit. real hurricane dat. in Houst.n t. demonst.at. t.e effect.veness of t.e proposed model.

关键词： Resilience Hurricane Energy st.rage Dist.ibut.on syst.m

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Format.on and t.ansport.of a Saharan Dust.Plume in Early Summer

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Journal of At.ospheric Science Research 2023年第2期6卷 58-74页

作者： Habib Senghor Abdou L.Dieng Moussa Gueye Cheikh A.Diop Mariane D.Kane Amadou t.Gaye Agence Nat.onale de l’Aviat.on Civile et.de la Mét.orologie Dakar8184Sénégal Laborat.ire de Physique de l’At.osphère et.de l’Océan Siméon-Fongang(LPAO-SF) UniversitéCheikh Anta DiopDakar10700Sénégal Départ.ment.de Mat.émat.ques et.Informat.ques Universitédu Sine Saloum Elhadj Ibrahima NiassKaolack BP 55Sénégal

t.is research st.dies t.e capabilit. of t.e Weat.er Research and Forecast.ng model coupled wit. t.e Chemist.y/Aerosol module(WRF-Chem)wit. and wit.out.paramet.izat.on t. reproduce a dust.st.rm,which was held on 27t. June 2018 over Sahara *** aut.ors use sat.llit. observat.ons and ground-based measurement. t. evaluat. t.e WRF-Chem *** sensit.vit.es of WRF-Chem Model are t.st.d on t.e replicat.on of haboob feat.res wit. a t.ned GOCARt.aerosol *** of simulat.ons wit. sat.llit. and ground-based observat.ons show t.at.WRF-Chem is able t. reproduce t.e Aerosol Opt.cal Dept.(AOD)dist.ibut.on and associat.d changes of haboob in t.e met.orological fields wit. t.mperat.re drops of about.9℃and wind gust 20 m·s–*** WRF-Chem Convec-t.on-permit.ing model(CPM)shows st.ong 10-met.r winds induced a large dust.emission along t.e leading edge of a convect.ve cold pool(LECCP).t.e CPM indicat.s heavy dust.t.ansport.d over t.e West.African coast.16°W-10°W;6°N-21°N)which has a pot.nt.al for long-dist.nce t.avel on 27t. June bet.een 1100 Ut. and 1500 *** daily precipit.t.on is improved in t.e CPM wit. a spat.al dist.ibut.on similar t. t.e GPM-IMERG precipit.t.on and maxi-mum rainfall locat.d at.t.e right.*** well as raising a large amount.of dust.t.e haboob caused considerable dam-age along it. rout..

关键词： Dust.st.rm WRF-Chem Convect.on-permit.ing Paramet.rizat.on MCS

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