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简介：Theobjectivesofthisresearchweretocharacterisetheclaymineralscompositionofsoil-deriveddustinNorthernChinaandtosetupamineralogicalsignaturetotracetheirorigin.MineralcompositionofaerosolparticleswasinvestigatedatAksu,Dunhuang,Yulin,TongliaoandChangwuduringanintensivefieldcampaignperiodofACE-Asia.Theresultsshowthatthekaolinite(K)tochlorite(C)ratioissensitivetotheregionaloriginofAsiandust.Westernsourceareas(representedbyAksu)displayedthelowestK/Cratioof0.3(average),whileitwasfoundtoincreaseupto0.70(average)uponmovingtowardsnorthernsourceareas(representedbyYulin).BystudyingtransporteddustinadepositionarearepresentativeoftheChineseLoessPlateau,theusefulnessoftheK/Cratio,whenassociatedwithbackair-masstrajectories,wasfoundtolieinrevealingtheoriginofthedust.ComparisonofthemineralogicaldatabetweenAsiandustandSaharadust,showsthattheK/Cratioisalsoaneffectivesignaturetoidentifythesourceareasonahemispherescale.

简介：WesummarizeinthisoverviewachievementsincurrentresearchfrontiersinAsiansanddustwithemphasisonthemethodforsanddustresearch,thesourcesofsanddustaerosols,emissionofsanddust,mechanismofsanddustweather,chemicaltransformationduringtransport,andinfluencesonclimaticenvironmentandoceans.OurmainresultsshowthatmostofAsiansanddustcomesfromMongolia,theGobiDesert,aridandsemiariddesertareasinnorthwestChina,whichisdividedintoinitialsourcesandenhancedsources.HalfoftheglobalproductionofdustoriginatesfromAsiandustsourceregions.Asiandustweatherissoimmensethatitcancovera5-7-dayjourneyfromthesourcestotheKoreanPeninsula,JapanIslands,andthePacificOceantoevenimpactNorthAmerica.Asiandustweatherplaysanactiveroleinthebiogeochemicalcyclesoftraceelementsinthemid-latitudeNorthernHemisphere.

简介：

简介：Inthispaper,wederivetwogeneralparameterizedboundariesoffinitedifferenceschemeforVee’sPDEwhichisusedtopricebothfixedandfloatingstrikeAsianoptions.Usingthesetwoboundaries,wecandealwithallkindsofsituations,especially,someextremecases,likeoverhighvolatility,verysmallvolatility,etc,underwhichtheAsianoptionisusuallymispricedinmanyexistingnumericalmethods.Numericalresultsshowthatourboundariesareprettyefficient.