简介:Northernpeatlandsstorealargeamountofcarbonandplayasignificantroleintheglobalcarboncycle.Owingtothepresenceofwaterloggedandanaerobicconditions,peatlandsaretypicallyasourceofmethane(CH4),averypotentgreenhousegas.ThispaperreviewsthekeymechanismsofpeatlandCH4production,consumptionandtransportandthemajorenvironmentalandbioticcontrolsonpeatlandCH4emissions.TheadvantagesanddisadvantagesofmicrometeorologicalandchambermethodsinmeasuringCH4fluxesfromnorthernpeatlandsarealsodiscussed.ThemagnitudeofCH4fluxvariesconsiderablyamongpeatlandtypes(bogsandfens)andmicrotopographiclocations(hummocksandhollows).Someanthropogenicactivitiesincludingforestry,peatharvestingandindustrialemissionofsulphurdioxidecancauseareductioninCH4releasefromnorthernpeatlands.FurtherresearchshouldbeconductedtoinvestigatetheinfluenceofplantgrowthformsonCH4fluxfromnorthernpeatlands,determinethewatertablethresholdatwhichplantproductioninpeatlandsenhancesCH4release,andquantifypeatlandCH4exchangeatplantcommunitylevelwithahighertemporalresolutionusingautomaticchambers.
简介:InSeptember2002,"OrganizingofNationalRareEarthEnterprisesGroup"whichwasdeliveredbyoriginalNationalEconomy&TradeCommitteeandoriginalNationalPlanningCommittee,MinistryofFinanceP.R.C,MinistryofLand&ResourceP.R.C.andMinistryofForeignEconomy&Trade,wasapprovedbytheStateCouncilofP.R.C.toorganizeSouthernandNorthernRareEarthGroups.OnOctober30,2002,ChinaNorthernREGroupCo.,LtdPreparationTeamheldthefoundationconventioninBaotou,whichdrewthecurtainof...
简介:TheGeologicalSurveyofNorway,incooperationwiththeGeologicalSurveysof22othercountriesandundertheaegisoftheCommissionfortheGeologicalMapoftheWorld(CGMW),hascompiledageologicalmapofnorthernEuropeatthe1:4millionscale.Forthefirsttimethegeologyofbothlandandseaareasofthislargeregionisdisplayedinasingledocument.Theareacoveredextends
简介:打区域是巴基斯坦的一个生物多样性中心。植物种类,特别树,在Swat,区域从全球气候暴露于扑灭威胁变化。用HADCM3A2a全球气候变化情形,种类分发的最大的熵(MaxEnt)建模在未来分发预言了一个可观的变化受苦pindrow(Royle前D.Don)Royle。AUC(在曲线下面的区域)0.972和0.983珍视目前是重要的,未来分发分别地种类当模特儿。象最温暖的季度(bio_10)和年度温度范围(bio_7)的吝啬的温度那样的有关生物与气候的变量显著地作出贡献到模型并且因此影响种类的预言的分发和密度,是清楚的。未来模型预言到一年,2080人口密度将显著地减少。种类的最高的密度在Sulatanr和Mankial的区域在山谷的东方、西方的边阶被记录。在种类的密度和分发的变化能有可观的影响,不是仅仅在树种类本身上,但是在联系subflora上也。
简介:ASXlistedheavyrareearthsproducerNorthernMinerals'firstshipmentofheavyrareearthcarbonatehasleftthecompany'sBrownsRangeminesiteintheEastKimberleyregionofWA.Thealmost2.6tonneshipmentconstitutesarareearthcarbonateproductthatwasproducedduringthecommissioningphaseofoperationalstart-upatthemineandwillbesenttoDarwinPortforshipmenttocustomersinChinainthenextfewdays.
简介:Inthispaper,theresponseoftheatmospheric3-5yearcycletoNorthernPacificSSTisdiscussed,Theresultsareasfollows:1.FromthesimultaneoustemporalcorrelationsbetweentheEquatorialEasternPacificSST,thewesterlydirftarea’sSSTandtheNorthernPacificSSTatallgridpoints,wefindthattherearethreecorrelativeregionsintheNorthernPacificSSTfield,theyarethewesterlydriftarea,theEquatorialEasternPacificandtheAlaskaBay,andtheirstructuresareverysimilartothePNApatternintheatmosphereThedifferencePTIbetweentheEquatorialEasternPacificSSTanomalyandthewesterlydriftarea’sSSTanomalycanindicatethechangeofthePNApatternoftheNorthernPacificSSTanomaly.ItcanrepresentSSTchangeof65%areasovertheNorthernPacificandcankeepwatchonElNinoandun-ElNino.2.SimultaneoustemporalcorrelativefieldbetweenPTIandfiltered500hPa(thereis3-5yearcycleonly)oftheNorthernHemispherepresentsclearPNAstructure.Theresp
简介:统计downscaling的二条途径在19602008期间在夏天在北京车站基于每日的最大、最小的温度观察的百分位数被用于温度极端的索引。一个人到过由起初使用文件结束分析和逐步的线性回归的下阶层的每天最大、最小的温度,然后计算极端的索引;其它到过直接下阶层由使用季节的大规模温度和geo潜在的高度记录的基于百分位数的索引。交叉验证结果证明后者途径比前者有更好的表演。然后,后者途径在北中国被用于48个气象学的车站。所有48个车站的交叉验证结果显示出在基于百分位数的索引和季节的大规模变量之间的靠近的关联。最后,在北中国的温度极端的索引的未来情形被把统计downscaling用于哈德利中心投射联合模型版本3(HadCM3)在代表性的集中小径下面的模拟4.5(RCP4.5)第五的情形联合了模型内部比较的工程(CMIP5)。结果证明每日的最大的温度的第90百分位数将在所有地s珀?珀由大约1.5talSe增加吗??
简介:基于改进客观气旋察觉和追踪的算法,在在北东亚的热带以外的气旋的十的变化被使用ECMWF40年分析(ERA-40)学习海平面的压力数据在期间19582001。结果表明那项热带以外的气旋活动显示了清楚季节,内部在北东亚的年度、十的可变性。春天是气旋最经常发生的季节。热带以外的气旋的空间分发证明气旋主要在40°以内发生50°N在北东亚的纬度的乐队,和出现的最经常的区域在蒙古。而且,这研究也揭示热带以外的气旋的频率显著地在北东亚的更低的纬度区域减少了在期间的事实19582001,但是十的可变性在更高的纬度乐队统治了,与经常的气旋开始。热带以外的气旋的紧张在一个年度、季节的基础上减少了。在北东亚的气旋的年度数字的变化与baroclinic的吝啬的紧张被联系正面的地区,它被在更高的纬度温暖的气候影响。而且,随北方的增加和在北东亚的南部的部分的减少,额外的热门气旋变化的偶极子结构与有关向北方baroclinic的运动110°E的任何一个方面上的正面的地区。
简介:ThecoastallowlandsinnorthernJiangsuProvince,China,ischaracterizedbylowreliefandlowwatersurfacegradientinstreams.Thefloodingstagesarecommonlylowerthanthehigh-tidelevelandthetidalrangeisrelativelysmall.Allthesefactorsprohibitrapiddischargeoffloodwaterandmakethefloodregimeshereextremelysensitivetothesealevelrise.The1991PlumRainwasexamined,whenprecipitationwassignificantlyhigherthannormal.Theone-dimensionalopen-channelnon-conservativeflowmodelwasusedtosimulatethestreamflowinthechannelnetworkofstudiedarea.GIStechnologywasusedtodelineatethemaximuminundatedareabyanalyzingtheDEMs.
简介:TheXiannvshanfaultzone,lyingalongthewesternmarginoftheHuanglinganticline,isoneofthemostimportantfaultzonesintheThreeGorgesreservoirarea.ThefaultexperiencedstrongactivityduringtheCenozoicEra.ThequestionofwhetherthefaultzonegoesthroughtheYangtzeRiverhasbeenoneofthekeyproblemsfacedinpreviousstudiesasithasasignificantinfluenceupontheassessmentofgeologicalhazardsandearthquakestabilityinthereservoirarea.BasedontectonicandgeomorphicobservationsalongthefaultzonebetweentheBaixianchivillageinChangyangcountyandHuangkouvillageinZiguitown,togetherwiththecomparisonsbetweenthegeologyinGuizhouandQuyuantowninthenorthbankoftheYangtzeRiverandtheXiannvshanfaultzone,itissuggestedthatthenorthendofthisfaultzoneislocatedaroundHuangkouvillageanddoesnotgothroughtheYangtzeriversnorthward.Theevidenceisasfollows:①Onthebasisoffielddatacollection,itisfoundthattheXiannvshanFaultzone,whichstretches80km,underwentthrustmovementintheCenozoicperiod,resultinginravinesandfaultscarps,topographically.Whereas,onthenorthernbankoftheYangtzeRiver,faultsarerarelyfound,andmostofthefaultsaredevelopedintheJurassicstrata,withouttopographicaleffects.Therefore,theXiannvshanFaultzonehasnotstretchedtothenorthbankoftheYangtzeRiver.②ThefaultgougeandtectonitezonewerefounddevelopedontheXiannvshanFaultzoneatBaixianchivillage,butonlyatectonitezonewasfoundatZhoupingvillage.Therearealsosomebranchfaultsclosetothenorthernendofthefaultzone.So,theactivityofthefaultzoneweakenedfromsouthtonorthinCenozoic.ThefaultzoneextendsnorthwardanddiesoutatHuangkou.Itdoesn’tstretchforwardanylongerasindicatedbycontinuousstrata,sparsejoints,andsmallfolds,etc.
简介:这份报纸证明一个环形的模式能从北方大西洋摆动(NAO)和Pacific/North美国人(PNA)的联合被构造模式。伪环状,南方的偶极子和构造环形的模式的垂直barotropy大西洋摆动(AO)模式类似于那些。它也以变化贡献是一个主导的模式。而且,它与AO的时间的关联是相当强壮的。这个新环形的模式优于AO因为它合并PNA的大部分并且做行动的中心在和平更强壮、比AO的更身体上相关。或,更通常,它可以被认为是不同于AO的一个物理模式。这研究的结果也显示NAO-PNA观点包含大多数AO的信息,而AO观点仅仅关于NAO-PNA的信息的一半包含。因而,NAO-PNA观点被作者考虑比AO的更全面。
简介:InhisstudvofthetransformationofhistoricaltraditioninHittiteliteratureH.Gterbockpublished,translatedandbrieflycommentedonthemajorpartofacuriousOldHittitetextrelatingunprecedentedcasesofcannibalisminNorthernSyria(G(?)rbock1938).BecauseofamixtureoflegendaryandhistoricalcharacteristicsthetextwasincludedbyCiterbockintothecategoryof"traditionalliterature"(1938:112).InhicatalogueofHittitetextsE.LarocheputKBoⅢ60(togetherwithKUBXXⅢ7andXXXⅥ126)inthegroup"Fragmentsrelatifsauxguerreshourrites"(CTH17).
简介:Today42%(9000km^2)oftheareaofHesseiscoveredwithforests.Thetotalareaofforestshasslightlyincreasedsinceseveralyears.ButactuallytheforestsadjacenttotheconurbationsofNorthernHesseinthevicinityofKasselinparticularandintheRhein-MainRegionsurroundingFrankfurtareinaverydifficultposition.Thereisbigdemandforlandtobeconvertedintosettlements,infrastructure,etc.,whilethereisincreasingneedfortheprotectiveandrecreationalfunctionsoftheforests.Thereforemaintenanceofexistingforestsandestablishmentofnewforestsareamongstthemostimportantresponsibilitiesoftheforestauthoritiesonregionalanddistrictlevel.