简介：白垩纪碳酸盐存款在伊朗的西北是更加广泛地分布式的并且形成大多数沉积单位与尖不顺从在这些单位上扔了的区域和不同新生代的paleohighs。西北的伊朗的白垩纪stratigraphic单位能被划分成三个主要范畴：碎屑状的、浅碳酸盐并且远洋。碎屑状的外形包括集团企业，角砾岩和有细密纹理的碎屑状的组和碳酸盐外形由公海(A)，酒吧(B)，泻湖(C)，和潮汐的公寓的microfacies的系列组成。有不同踪迹石块的相对深的碳酸盐存款也是在伊朗的西北的白垩纪沉积环境的更深的部分的指示。与狭窄的Neotethys海洋(Khoy-Zanjan)的扩大的参考，架边缘Neotethys海洋的沉积环境能为Azarshahr大不里士区域被假定，在Varaghan的海岸的flysch和clastics外形在此随深度的增加向北部分扔了。由在现在的学习期间使用不同沉积外形的狭窄的Neotethys海洋的扩大上的调查被看作在伊朗和中东的西北的区域完成白垩纪时间的paleogeographic数据的重要的步。

简介：Theperfectlymatchedlayer(PML)isaneffectivetechniquefortruncatingunboundeddomainswithminimalspuriousreflections.Afluidparabolicequation(PE)modelapplyingPMLtechniquewaspreviouslyusedtoanalyzethesoundpropagationprobleminarange-dependentwaveguide(LuandZhu,2007).However,LuandZhuonlyconsideredastandardfluidPEtodemonstratethecapabilityofthePMLanddidnottakeimprovedone-waymodelsintoconsideration.Theyapplieda[1/1]Padéapproximanttotheparabolicequation.Thehigher-orderPEsaremoreaccuratethanstandardoneswhenaverylargeanglepropagationisconsidered.Asforrange-dependentproblems,thetechniquestohandletheverticalinterfacebetweenadjacentregionsaremainlyenergyconservingandsingle-scattering.Inthispaper,thePMLtechniqueisgeneralizedtothehigherorderelasticPE,asistothehigherorderfluidPE.Thecorrectionofenergyconservingisusedinrange-dependentwaveguides.Simulationismadeinbothacousticcasesandseismo-acousticcases.Range-independentandrange-dependentwaveguidesarebothadoptedtotesttheaccuracyandefficiencyofthismethod.ThenumericalresultsillustratethataPMLismuchmoreeffectivethananartificialabsorbinglayer(ABL)bothinacousticandseismo-acousticsoundpropagationmodeling.

简介：美国非营利组织GreenWave主管布伦·斯密斯描述未来的农业场景:人类的耕作地点从陆地转向海洋,用锚定在海床上的绳索饲养牡蛎,贻贝,蛤蜊和海藻。这一想法并非天方夜谭。随着陆地耕作的问题愈加突出——农业耕作带来的温室气体排放越来越严重——和海洋过度捕捞,人类需要开发新的食物来源。GreenWave的海藻农场提供了一种可行的方案:农场

简介：Oceanicgeneralcirculationmodelshavebecomeanimportanttoolforthestudyofmarinestatusandchange.ThispaperreportsanumericalsimulationcarriedoutusingLICOM2.0andtheforcingfieldfromCORE.WhencomparedwithSODAreanalysisdataandERSST.v3bdata,thepatternsandvariabilityofthetropicalPacific–IndianOceanassociatedmode(PIOAM)arereproducedverywellinthisexperiment.Thisindicatesthat,whenthetropicalcentral–westernIndianOceanandcentral–easternPacificareabnormallywarmer/colder,thetropicaleasternIndianOceanandwesternPacificarecorrespondinglycolder/warmer.ThisfurtherconfirmsthatthetropicalPIOAMisanimportantmodethatisnotonlysignificantintheSSTanomalyfield,butalsomoreobviouslyinthesubsurfaceoceantemperatureanomalyfield.Thesurfaceassociatedmodeindex(SAMI)andthethermocline(i.e.,subsurface)associatedmodeindex(TAMI)calculatedusingthemodeloutputdataarebothconsistentwiththevaluesoftheseindicesderivedfromobservationandreanalysisdata.However,themodelSAMIandTAMIaremorecloselyandsynchronouslyrelatedtoeachother.

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简介：Byinvestigatingtheeffectsondeepoceanambientnoiseoftyphoon'KAI-TAK'whichpassedthenorthareaoftheSouthChinaSea,itisshownthatthewindspeed,therainfallintensityandthelongwaveswellcausedbytyphoonaffecttheoceanambientnoisesignificantly.Thecorrelationbetweentheoceanambientnoiseandthewindspeedduringthetyphoonismuchbetterthanthatinthenon-typhoonperiodinthesameBeaufortscale.Analysisofthecorrelationbetweenthe415hoceanambientnoisemeasureddataandwindspeedshowsthat,whenthefrequencyisgreaterthan300Hz,thecorrelationcoefficientbetweentheoceanambientnoiseandthewindspeedisgreaterthan0.5,achievingamoderatecorrelation;whenthefrequencyisgreaterthan630Hz,thecorrelationcoefficientisbetween0.8and0.9,achievingahighdegreeofcorrelation.Thecorrelationbetweentheoceanambientnoiseandthewindspeedisbetterthanthatbetweentheoceanambientnoiseandthesignificantwaveheightwhenthefrequencyisgreaterthan300Hz.Thecorrelationbetweentheoceanambientnoiseandthewindspeedininfrasonicbandfrom10Hzto20HzispoorintheSouthChinaSea,becausetheshippingisbusyinthisseaareaandtheoceanambientnoiseiscontaminatedbytheshipnoiseevenduringthetyphoon.

简介：对台风Megi(2010)的上面海洋的回答从南船座漂流和卫星TMI用数据被调查。实验用一个三维的普林斯顿海洋模型(POM)被进行估计暴风雨，它影响了西北太平洋(NWP)和华南海(SCS)。结果证明upwelling和乘火车一起为93%SST异例试验报道，在导致台风的upwelling可以引起强壮的海洋冷却的地方。另外，冷却的异常SST比在NWP在SCS是更强壮的。海洋反应的最惹人注目的特征是在在NWP是不在的SCSa特征的一个二层的惯性的波浪的存在。当台风醒来，在惯性附近的摆动能被产生，它在表面有最大的流动速度混合的层并且可以持续一些天，在台风经过以后。沿着台风轨道，在上面的海洋的水平水流显示出一系列轮流出现从台风发出的否定、积极的异例。

简介：在Shennongjia区域的Doushantuo继任的地球化学和paleogeography不足地被学习了。这里，我们在碳上报导，EdiacaranDoushantuo的氧同位素作文在Shennongjia区域从四节(Longxi，Muyu，Yazikou和Songluo)盖住碳酸盐。一个大C同位素的坡度(~5)在Longxi和Songluo节之间，这里第一次识别了，被推断到被光合作用动态地在深水里在表面水和溶解的器官的碳(文档)的厌氧的氧化里维持了。在在四节之中的C同位素chemostratigraphy的空间变化与Marinoan冰期后的海平面的举起变化有关。在Longxi，积极13C在包含像圆锥形帐蓬的结构的地平线下面的carb移动在早回归期间源于强烈光合作用。否定13C在圆锥形帐蓬地平线以内的carb移动被与13弄空C的溶解的无机的碳(DIC)在迟了的回归期间。积极13Ccarb旅行在最高帽子碳酸盐的部分与有关在早违反期间提高主要生产率和有机物埋葬。在Muyu，碳同位素的变化趋势，在Longxi类似于那，可能被表面水环境温和地影响了。在Songluo，积极13C直到在帽子碳酸盐的更低的部分的-4，carb旅行可能在深水里与methanogenesis被联系在期间晚，到早回归并且随后的违反在迟了的回归期间由于甲烷水合物的分解消失了。在Yazikou，一致地稳定的13C在-4附近的carb价值显示帽子碳酸盐可能在中间的水深度扔了。是由学习节的诊断沉积特征证实了，Shennongjia区域的palaeogeographic框架展出了在雪球土的余殃在早Ediacaran时期期间从SE加深到NW。

简介：Remnantoceanbasinisakeytounderstandtheplatesuturingandsubsequentupliftanderosionoforogen.TheBayofBengalBasin(BOBB)providesatypicalexampletoanalyzetheremnantoceanbasinstructures,evolution,andrelationshipsbetweendepositionalfillingandupliftingoftheHimalayanOrogen.Thirty-nineseismicprofilesaswellasintervalvelocitiesofwellBODC3wereusedtocompileisopachmapsofthebasin.Amongtheseismicdata,26seismicprofileswereappliedtoestablish8crosssections.Thecrosssectionssuggestthebasinisasymmetric,boundedtothewestbytheeasterncontinentalmarginofIndia(ECMI)withgraben-horstandtotheeastbytheSundaconvergencemargindominatedbytrench-arcsystem.TheBOBBischaracterizedbyaprominentdownflexurestructurescausedbyhugeamountofBengalfanturbiditesedimentsaccumulation.OurisopachmapsandchronologydatacollectedfromadjacentregionsrevealtheinitialdevelopmentandfastsouthwardgrowthoftheBengalfanwererelatedtotheearlyandmajorstageupliftanderosionoftheHimalayanOrogen,respectively.TheBOBBhasexperiencedacriticaltransitionfromanoceanbasintoaremnantoceanbasinatLateOligocene.SuchbasinstructuresandevolutionfeaturesindicatetheBOBBprovideswholerecordsofobliqueconvergenceoftheIndiaandAsiaplates,andtheearlyandmajorstageevolutionoftheHimalayanOrogen.

简介：Inthisstudy,weexaminealong-termincreasingtrendinsubtropicalpotentialvorticity(PV)intrusioneventsoverthePacificOceaninrelationtotheglobalmeantemperaturerise,basedonmultiplereanalysisdatasets.ThefrequencyofthePVintrusionsiscloselyrelatedtotheupper-troposphericequatorialwesterlyductandthesubtropicaljet(STJ).AnoverallstrengtheningofthewesterlyductandweakeningoftheSTJarefoundtobedrivenbythewarming-inducedstrengtheningofWalkercirculationandregionalchangesinHadleycirculationonmulti-decadaltimescale,leadingtoanincreaseinthePVintrusionfrequencyoverthetropics.Theresultsarerobustinalldatasets.Themulti-decadalstrengtheninginthePacificWalkercirculationisconsistentwiththeglobalmeantemperaturerise.Inthisway,thePVintrusionsarecorrelatedwiththewarmingrelatedglobalmeantemperuaterise.WhentheinterannualvariabilityofENSOisremovedfromtheintrusiontimeseries,thelong-termtrendinPVintrusionsduetoexternalforcingassociatedwithanthropogenicwarming(globalmeantemperaturerise)becomesclearer.Thelinkbetweentheglobalmeantemperatureriseandintrusionfrequencyisfurtherverifiedbyperformingacorrelationanalysisbetweenthetwo.Thesignificant(>95%)correlationcoefficientis0.85,0.94,0.84,0.83,and0.84forERA-40,ERA-Interim,NCEP-NCAR,JRA-55,andJRA-25,respectively.Thisunequivocallyindicatesthattheglobalmeantemperaturerisecanexplainaround69%–88%ofthevariancerelatedtothelong-termincreaseinPVintrusionfrequencyoverthePacificOcean.

简介：在我们讨论基于含碳二叠的stratigraphic的领域调查预定Paleo亚洲的海洋的最后的闭合的这份报纸，在东南的内部蒙古的序列和沉积环境与它的附近的区域的地质学结合了。研究显示出那在期间在Tianshan-HingganOrogenic系统的东方片断含碳二叠，有对大陆人沿岸浅海的巨大的ENE-NE-trending沉积的盆，通过东南的内部蒙古向东从Ejinqi在西方开始进吉林和Heilongjiang。分发更低在广阔区域含碳是稀少的。晚含碳或二叠的暴烈沉积的岩石unconformably总是躺泥盆纪以上单位。上面含碳中间二叠被沿岸浅海的存款统治并且上面二叠，由大陆人存款。晚含碳二叠没有subduction碰撞造山运动的踪迹，逐渐地暗示盆由缩小和shallowing消失了。另外，是笔记感兴趣Ondor和和Hegenshanophioliticm戠獩畣瑩Τ

简介：Thisstudydeterminesthepollution,fractionation,andecologicalrisksofsediment-boundheavymetalsfromcoastalecosystemsofftheEquatorialAtlanticOcean.ContaminationFactor(CF),pollutionloadindex(PLI),andgeoaccumulationindex(Igeo)wereusedtoassesstheextentoftheheavymetalpollution,whilethepotentialecologicalriskwasevaluatedusingtherisksassessmentcode(RAC)andH?kansonpotentialecologicalrisk.Theanalysisrevealedconcentrations(mg/g,dw)ofthecadmium(Cd),chromium(Cr),copper(Cu),nickel(Ni),andlead(Pb)insedimentsforwetanddryseasonsvaryfrom4.40-5.08,14.80-21.09,35.03-44.8,2.14-2.28,and172.24-196.39,respectively.Theresultsalsoshowedthatthemetalfractionationpercentagesintheresidual,oxidizable,andreduciblefractionsarethemostsignificant,whiletheexchangeableandcarbonateboundtracemetalsarerelativelylow.TheRACvaluesindicatenoriskforCdandNiandlowriskforothermetalsatallthestudiedsitesduringbothseasons.PotentialecologicalriskanalysisoftheheavymetalconcentrationsindicatesthatCdhadhighindividualpotentialecologicalrisk,whiletheothermetalshavelowriskatallinvestigatedsites.Themulti-elementalpotentialecologicalriskindices(R1)indicatehighecologicalriskinalltheecosystems.

简介：ObjectiveTwoimportantgeologicalissueshavelongbeencontroversialintheXing–MengareaofNorthChina.ThefirstconcernsthefinalclosureofPaleo-AsianOceaninXing–Mengarea,andtheotherconcernsthefoldingandliftingoftheXing-MengTrough.ThefocusofthsesissuesistheLatePermiansedimentaryenvironment,whichis