学科分类
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114 个结果
  • 简介:基于三个全球年度吝啬的表面温度时间系列和三个中国年度平均数表面空气温度时间系列,多重timescales上的气候变化趋势被使用多滑动的时间窗户的趋势评价方法分析。结果被用来在1998-2012期间讨论所谓的全球温暖的中断。不同开始和结束时间在趋势评价的结果上有明显的效果,这被表明,并且当使用一扇短窗户时,含意特别地大。全球温暖的中断在1998-2012期间是在短timescales上看温度系列的结果;并且类似于它的事件,或有甚至冷的趋势的事件,实际上历史上多次发生了。因此,全球温暖的中断是可能的是长期的温度变化的一个期刊特征。它主要在短学期反映温度,和如此的现象的十的可变性不从长远的观点看改变全面温暖趋势。

  • 标签: 滑动时间窗 全球变暖 平均温度 中断 时间序列 估计方法
  • 简介:BasedontheknowinggeochemicalcharacteristicsofwallrockintheMobingolddepositandcompositionoffluidinclusioninore,water-rockexperimentswerecarriedout,importantachievementsareacquiredasfollowing:Goldismainlyderivedfromtheore-bearingwallrock,i,e.,aseriesofepimetamorphicclasticgritstone,sandyslate,andtuffaceousslateintheWuqiangBanxiFormation,WuqiangxiGroup.Inthermalsystemwithmiddle-lowtemperaturechlorinegoldmaybederivedformstablecomplexions,soitisquiteimportantingoldmetallogenicprocess.Sulphurandchlorineperformasthemajornegativeionsthroughoutthegoldactivationandmigrationmovement.Theconcentrationofsulphurandchlorineions,pHvalueandtemperatureareofdecidingsignificanceforgoldactivation,migrationandprecipitation.

  • 标签: Thermal FLUID system water-rock INTERACTION GOLD
  • 简介:UsingtheCAM3.0model,weinvestigatedtherespectiveeffectsofaerosolconcentrationincreasinganddecadalvariationofglobalseasurfacetemperature(SST)aroundyear1976/77ontheEastAsianprecipitationinborealsummer.BydoublingtheconcentrationofthesulfateaerosolandblackcarbonaerosolseparatelyandsynchronouslyinEastAsia(100-150°E,20-50°N),theclimateeffectsoftheseaerosolsarespecificallyinvestigated.TheresultsshowthatboththedecadalSSTchangingandaerosolconcentrationincreasingcouldleadtorainfalldecreasinginthecenterofEastAsia,butincreasingintheregionsalongsoutheastcoastareasofChina.However,thedifferentpatternsofrainfalloveroceanandlowerwindfieldoverAsiancontinentbetweenaerosolexperimentsandSSTexperimentsinCAM3.0indicatethepresenceofdifferentmechanisms.Intheincreasedaerosolconcentrationexperiments,scatteringeffectisthemainclimateeffectforbothsulfateandblackcarbonaerosolsintheEasternAsiansummer.Especiallyintheincreasedsulfateaerosolconcentrationexperiment,theclimatescatteringeffectofaerosolleadstothemostsignificanttemperaturedecreasing,sinkingconvectionanomaliesanddecreasedrainfallinthetroposphereoverthecentralpartofEastAsia.However,inanincreasedblackcarbonaerosolconcentrationexperiment,weakenedsinkingconvectionanomaliesexistatthesoutherlyposition.ThisweakenedsinkinganditscompensatingrisingconvectionanomaliesinthesouthleadtotheheavyrainfalloversoutheastcoastareasofChina.Whenconcentrationsofbothsulfateandblackcarbonaerosolsincreasesynchronously,theanomalousrainfalldistributionissomewhatlikethatintheincreasedblackcarbonconcentrationaerosolexperimentbutwithlessintensity.

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  • 简介:Theannual,interannualandinter-decadalvariabilityofconvectionintensityofSouthChinaSea(SCS)summermonsoonandair-seatemperaturedifferenceinthetropicaloceanisanalyzed,andtheirrelationshipisdiscussedusingtwodatasetsof48-aSODA(simpleoceandataassimilation)andNCEP/NCAR.AnalysesshowthatinwintertimeIndianOcean(WIO),springtimecentraltropicalPacific(SCTP)andsummertimeSouthChinaSea-WestPacific(SSCSWP),air-seatemperaturedifferenceissignificantlyassociatedwiththeconvectionintensityofSouthChinaSeasummermonsoon.Correlationoftheinter-decadaltimescale(above10a)ishigherandmorestable.Thereisinterdecadalvariabilityofcorrelationinscaleslessthan10aanditisrelatedwiththeair-seatemperaturedifferenceitselfforcorrespondingwaters.Theinter-decadalvariabilityoftheconvectionintensityduringtheSouthChinaSeasummermonsooniscloselyrelatedtotheinter-decadalvariabilityofthegeneralcirculationoftheatmosphere.Sincethelateperiodofthe1970s,inthelowertroposphere,thecross-equatorialflowfromtheSouthernHemispherehasintensified.Attheuppertropospherelayer,theSouthAsianhighandcross-equatorialflowfromtheNorthernHemispherehasintensifiedatthesametime.ThenthemonsooncellhasalsostrengthenedandresultedinthereinforcingoftheconvectionofSouthChinaSeasummermonsoon.

  • 标签: 海空温差 热带海洋气候 季风 南海
  • 简介:Decreasingtherisksandgeohazardsassociatedwithdrillingengineeringinhigh-temperaturehigh-pressure(HTHP)geologicsettingsbeginswiththeimplementationofpre-drillingpredictiontechniques(PPTs).ToimprovetheaccuracyofgeopressurepredictioninHTHPhydrocarbonreservoirsoffshoreHainanIsland,wemadeacomprehensivesummaryofcurrentPPTstoidentifyexistingproblemsandchallengesbyanalyzingtheglobaldistributionofHTHPhydrocarbonreservoirs,theresearchstatusofPPTs,andthegeologicsettinganditsHTHPformationmechanism.OurresearchresultsindicatethattheHTHPformationmechanisminthestudyareaiscausedbymultiplefactors,includingrapidloading,diapirintrusions,hydrocarbongeneration,andthethermalexpansionofporefluids.Duetothismulti-factorinteraction,acloudofHTHPhydrocarbonreservoirshasdevelopedintheYing-QiongBasin,butonlytraditionalPPTshavebeenimplemented,basedontheassumptionofconditionsthatdonotconformtotheactualgeologicenvironment,e.g.,Bellotti’slawandEaton’slaw.Inthispaper,wefocusontheseissues,identifysomechallengesandsolutions,andcallforfurtherPPTresearchtoaddressthedrawbacksofpreviousworksandmeetthechallengesassociatedwiththedeepwatertechnologygap.Inthisway,wehopetocontributetotheimprovedaccuracyofgeopressurepredictionpriortodrillingandprovidesupportforfutureHTHPdrillingoffshoreHainanIsland.

  • 标签: pre-drilling prediction techniques formation PORE pressure
  • 简介:在下列春天和夏天的索马里人喷气(SMJ)紧张上的北方的冬季南极摆动(AAO)的teleconnection影响在这份报纸被检验。北方的冬季AAO的可变性是断然与在春天和夏天的SMJ紧张有关。分析证明在南部的高、中间的纬度的SST似乎用作连接这二个系统的一座桥。当AAO在强壮的积极阶段时,在南部的海洋上的SST在高纬度冷却并且在中间的纬度温暖,它坚持直到夏天;然而,在南部的高、中间的纬度的SST的可变性密切也被相关到有AAO-SMJ关系的连接SST可变性也是的机制讨论了的可能的SMJintensity.A。在北方的冬季的AAO通过联合的airsea在南部的高、中间的纬度生产一个SST异例模式。这个AAOrelatedSST异例模式在夏天调制本地Ferrel房间异例,在热带由地区性的哈德利房间异例列在后面。在热带的异常垂直运动然后改变landsea在通过低云盖子并且向下的可变性的热带印度洋和亚洲大陆之间的热对比表面longwave放射流动。最后,在热带印度洋之间的热对比异例和亚洲大陆改变的landseaSMJ紧张。从SST异例在南部的高、中间的纬度强迫的社区空气模型实验的结果也证实这个诊断物理过程到某程度。

  • 标签: 高纬度地区 海表面温度 索马里急流 南极涛动 北半球 冬季
  • 简介:Inthisstudy,amergeddatasetconstructedfromTropicalRainfallMeasuringMissionprecipitationradarrainproductsandIntegratedGlobalRadiosondeArchivedataisusedtoinvestigatethethermalstructuralcharacteristicsofconvectiveandstratiformprecipitationintherainyseason(May–August)of1998–2012overEastAsia.Theresultsshowthatthestormtopsforconvectiveprecipitationarehigherthanthoseforstratiformprecipitation,becauseofthemoreunstableatmosphericmotionsforconvectiveprecipitation.Moreover,thestormtopsarehigherat1200UTCthanat0000UTCoverlandregionsforbothconvectiveandstratiformprecipitation,andviceversaforoceanregion.Additionally,temperatureanomalypatternsinsideconvectiveandstratiformprecipitatingcloudsshowanegativeanomalyofabout0–2K,whichresultsincoolingeffectsinthelowertroposphere.Thiscoolingismoreobviousat1200UTCforstratiformprecipitation.Thepositiveanomalythatappearsinthemiddletroposphereismorethan2K,withthestrongestwarmingat300hPa.Relativehumidityanomalypatternsshowapositiveanomalyinthemiddletroposphere(700–500hPa)priortotheoccurrenceofthetwotypesofprecipitation,andtheincreaseinmoistureisevidentforstratiformprecipitation.

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  • 简介:在到地震预言的MODIS卫星遥感数据的应用程序的学习,论文第一次提出一个量的方法与反常亮度温度(BT)为象素估计比率为云移动的增加和一个初步的计划。原则是第一,无云的数据在时间,但是在不同的天内的一样的时期由一样的卫星观察了(通常1天到3天)是mosaiced得到晴朗天空的高比率,然后BT变化曲线和每个象素的mcan平方差别(MSD)从盖住的区域与数据被计算每天决定今日的BT数据作为标准用两倍MSD在某个象素由是正常的。为有反常BT增加的象素的比率能被与整个区域的全部的象素划分反常象素的全部的数字计算。在台湾区域的一系列最近的地震上的分析证明为有反常BT增加的象素的比率,通常在零附近波动,有突然的改进1天到在媒介强壮的地震前的20天。为识别地震预兆的一个新方法能被从MODIS卫星遥感随反常BT增加为象素分析比率的变化与经常的地震活动在区域通过特殊研究发现,这被期望红外线(红外)云的效果从被移开的信息到某个程度。

  • 标签: MODIS 人造卫星 热量 红外线数据 地震
  • 简介:一系列线性稳定性分析面对粘性,热传导性和expansivity的空间变化在热传送对流的发作上被执行。我们考虑附加到静电干扰的无穷小的不安的时间的进化(不动)并且在加热basally的平面层的传导性的状态。从在有增加粘性的温度依赖的振幅的流动模式的变化,我们识别了转变进停滞盖(圣)政体,在传送对流在仅仅下面发生的地方一在最高的表面的冷液体厚、停滞盖。详细分析在空间变化在热电导率或expansivity导致的圣政体显示出传送对流房间的方面比率的重要增加:圣传送对流的水平长度规模能被多达50%与深度随热电导率的10次增加扩大。我们进一步开发了成功地复制了在物理性质为给定的空间变化增加圣政体传送对流房间的水平长度规模的机制的圣传送对流的一个分析模型。我们的调查结果可以在披风在传送对流模式上加亮热电导率的空间变化的必要角色。

  • 标签: 线性稳定性分析 热对流 空间变异特征 膨胀率 热导率 粘度
  • 简介:UsingtheInternationalComprehensiveOcean-AtmosphereDataSet(ICOADS)andERA-Interimdata,spatialdistributionsofair-seatemperaturedifference(ASTD)intheSouthChinaSea(SCS)forthepast35yearsarecompared,andvariationsofspatialandtemporaldistributionsofASTDinthisregionareaddressedusingempiricalorthogonalfunctiondecompositionandwaveletanalysismethods.TheresultsindicatethatbothICOADSandERA-InterimdatacanreflectactualdistributioncharacteristicsofASTDintheSCS,butvaluesofASTDfromtheERA-InterimdataaresmallerthanthoseoftheICOADSdatainthesameregion.Inaddition,theASTDcharacteristicsfromtheERA-Interimdataarenotobviousinshore.Aseesaw-type,north-southdistributionofASTDisdominantintheSCS;i.e.,apositivepeakinthesouthisassociatedwithanegativepeakinthenorthinNovember,andanegativepeakinthesouthisaccompaniedbyapositivepeakinthenorthduringAprilandMay.InterannualASTDvariationsinsummerorautumnaredecreasing.Thereisaseesaw-typedistributionofASTDbetweenBeibuBayandmostoftheSCSinsummer,andthecenteroflargevaluesisintheNanshaIslandsareainautumn.TheASTDintheSCShasastrongquasi-3aoscillationperiodinallseasons,andaquasi-11aperiodinwinterandspring.TheASTDispositivelycorrelatedwiththeNio3.4indexinsummerandautumnbutnegativelycorrelatedinspringandwinter.

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  • 简介:在由有单个time/dual隧道裂口窗户算法的GMS-5/VISSR热红外线的数据的这份报纸的检索结果揭示特征日报、季节几代表性的陆地表面的清楚天空的陆地表面温度(LST)的变化录入中国包括Tarim盆,Qinghai西藏的高原,Hunshandake沙,诺思中国平原,并且华南。在上面的区域的清楚天空的LST的季节的变化由太阳的放射为影响的不同表面反照率,土壤水内容,和程度清楚地变化。每月的一般水准日报LST的范围在一年里有二座山峰和二条山谷。在东亚和在台湾海峡和黄海的南方的海表面温度(SST)的大多数土地的LST的特征也作为比较被分析。Tarim盆和Hunshandake沙有可观的LST不仅日报周期而且显著季节的变化。在2000,最大的每月的一般水准日报在两个区域的LST的范围在Hunshadake沙活动范围是超过30K,和年度范围58.50K。在Qinghai西藏的高原的LST的季节的变化是在东亚,Tarim盆,和Hunshandake沙的不到那些。然而,最大值日报范围在这个区域存在。每年的一般水准日报范围是在在2000的Qinghai西藏的高原的28.05K。特征日报、季节、年度从1998~2000的变化也在这研究被显示出。所有结果将对为陆地表面类型的变化的气候变化,放射平衡,和评价的研究珍贵。[出版摘要]

  • 标签: 中国 代表性地表类型 晴天 地面温度 日间变化 季度变化
  • 简介:TheultramaficdikesintheTarimlargeigneousprovince(TarimLIP),exposedintheXiaohaiziareainthenorthwesternTarimBasinofnorthwesternChina,haveporphyritictextures,andtheolivineandclinopyroxeneareasthemajorphenocrystphases.Thegroundmassthereinconsistsofclinopyroxene,plagioclaseandFe-Tioxides,withthecryptocrystallinetexture.TheolivinephenocrystsinonetypicalultramaficdikehaveFo(Mg/(Mg+Fe))numbersrangingfrom73to85,whicharenotinequilibriumwiththeolivine(Mg#of89)fromthehostrockcrystalized.Combinedwithmicroscopeobservation,boththeolivineandclinopyroxenephenocrystsaswellassomeFe-Tioxidesintheultramaficrockareaccountedascumulates.Theliquid(parentalmagma)compositionofSiO2of45.00wt.%–48.82wt.%,MgOof9.93wt.%–18.56wt.%,FeOof5.85wt.%–14.17wt.%,CaOof7.54wt.%–11.52wt.%,Al2O3of8.70wt.%–11.62wt.%andTiO2of0.00wt.%–3.43wt.%intheXiaohaiziultramaficrockwasestimatedbymassbalance,andtheresultsshowareasonableliquidproportioninthecumulate-bearingultramaficdike(ca.45%–60%inthewholerock).Theestimatedparentalmagmacompositioncorrespondstoameltingtemperatureof1300–1550oC,whichisequalorhigherthanthoseofanormalasthenospheremantle,supportingtheinvolvementofamantleplume.Combinedwithotherpreviousstudies,anevolutionmodelfortheformationprocessesoftheXiaohaiziultramaficdikeoftheTarimLIPisproposed.

  • 标签: 塔里木盆地 超镁铁质岩 中国西北部 大火成岩省 岩浆演化 熔化温度
  • 简介:TheoccurrencesofassociatedelementsandtheirgeneticfactorsintheNo.30coalseamintheZhijinCoalfieldwerestudiedusinginstrumentalneutronactivationanalysis,inductivelycoupledplasma-atomicemissionspectroscopy,andascanningelectronmicroscopeequippedwithanenergy-dispersiveX-rayanalyzer.And,amicroscopephotometersystem(LeitzMPV-Ⅲ)wasusedtoobservethecharacteristicsofcoalpetrology.Accordingtotheinfluencedegreebythesiliceouslow-temperaturehydrothermalfluids,theorganicmatterisdividedintofourtypes:A,B,C,andDofthehydrothermally-alteredorganicmatter(HAOM).ThestudyshowsthatthehighcontentofFe(2.31%)isnotfrompyrite,butmostlyfromthesiliceouslow-temperaturehydrothermalfluids.Theoccurrencesoftheassociatedelementsinthefourorganicmattertypesaredifferent.ThecontentsofFe,Si,andAlaredecreasing,butSandCuareincreasingintheorderoftheHAOM-A,HAOM-B,HAOM-C,andHAOM-D.Thelosingrateofsulfurinorganicmatteris0.35%andthecontentofFetakenfromthelow-temperaturehydrothermalfluidsintotheorganicmatteris0.794%duringthesiliceouslow-temperaturehydrothermalfluidsinvadingthecoalseam.Theabovefactsindicatethatthelow-temperaturehydrothermalfluidsplayacrucialroleinthere-distributionsandoccurrencesofassociatedelementsincoal.

  • 标签: LOW-TEMPERATURE hydrothermal fluid hydrothermally-altered organic matter