简介：WintertemperatureinChinaduringthelast500yearswasconstructedbasedonhistoricaldataaboutthefreeze-upevents,theheavysnowandtheagriculturaldamagesbroughtaboutbycoldweathersinEastChina(25°N--35°N,115°E--120°E).Fisrt,thedataaboutthefreezingofriversandlakesandthoseaboutsnowfallinthisregionwerecompiledandevaluatedonthebasisofanordinalscale.Thentheseriesoffreeze-upeventsandheavysnowwereproducedseparatelyandthecombinationoftheseserieswasmadetogenerateaconsistentseriesthatreflectsthechangesinthedegreeofcoldnessinwinterduringthelast500years.Finally,areconstructionofwintertemperaturewascarriedoutataresolutionof10yearsbasedonacalibrationofaregressionbetweenrecenttemperatureobservationsandthecoldwinterseriesconstructed.

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简介：这份报纸详细在全球温暖在的背景下面在中国分析表面湿度变化的特征最近由使用国家气象学的信息编的观察数据的50年中国集中。结果揭示那(1)随温度的增加，特定的湿度(qs)基本上显示出的表面浸透指数的生长，根据Clausius-Clapeyron方程。在冬季的全国平均的弄湿率显然是不到年度平均的率和夏天评价。在在中国的不同区域的qs趋势有一些地区性的差别。例如，在中国的中央、东方的部分的qs在夏天展出一个减少的趋势，与在这些区域的温度的变弱的趋势一致；(2)除了在东方中国的华南和Jianghuai区域的部分，一致地增加的趋势年度并且特定的湿度(q)在大多数中国被发现的冬季，特别在西方的中国。在夏天，除了在Qinghai西藏的高原上的东北中国，西北中国，和一些区域的部分，减少并且弄干的趋势在大多数中国是重要的，它不与全球吝啬的状况一致；(3)在大多数中国的表面亲戚湿度(RH)显示出一个减少的趋势。为RH的减小的主要原因之一是q的增加的率是比qs的那些小的。尽管如此，在中央、东方的中国的RH的向上的趋势在夏天主要由于在这些区域的冷却温度和升起的q被观察，导致更多的降水。从大约2003左右，当q严厉地在中国的大多数部分减少了时，qs显著地增加了；因此，RH在很大程度上减少了。这可以是仔细与在中国在的干旱区域的坚持的生长有关最近10年。

简介：ＴＨＥＶＡＲＩＡＴＩＯＮＦＥＡＴＵＲＥＳＯＦＡＧＲＯＣＬＩＭＡＴＩＣＲＥＳＯＵＲＣＥＳＡＮＤＣＲＯＰＹＩＥＬＤＯＦＣＨＩＮＡＩＮＲＥＣＥＮＴ４０ＹＥＡＲＳＧａｏＳｕｈｕａ（高素华）ａｎｄＺｈａｎｇＹｕ（张宇）ＲｅｓｅａｒｃｈＣｅｎｔｅｒｆｏｒＡｇｒｉ...

简介：Dailysnowdatafor2300climatestationscoveringtheperiodfrom1951through1980havebeenusedtomonitoranddiagnosesecularvariations,year-to-yearfluctuations,andthespatialcharacteristicsofsnowvariationtrendsinChina.AnexaminationoftimeseriesrevealsthatthereisastrongteleconnctiontoENSO,tomajorvolcaniceruptions,aswellastotheCO2-inducedwarming.Thecountry-widesnowmassvariationsarepositivelycorrelatedwithglobalmeantemperature,increasingduringthecurrentwarmingperiodanddecreasingduringtherecentcoolingperiodpriortothemid1960s.AsynchronousrelationshipexistsbetweenElNino/SouthernOscillationandsnowywinterinChina.Theyear-to-yearsnowfluctuationsseemtobegenerallyoutofphasewithvolcanicactivity.Theanomalymapshowsthatsnowmassincreasedinhighaltitudesandmoistregions,whileitdecreasedinaridlowlandandthesouthernbounda-ryzoneduringthewarmingperiod.ThepotentialCO2-inducedchangesinsnowmasswillfurtheraggravatetheregionaldifferentiationbetweenhighmountainsandlowlands,betweenmoistandaridregions.Thenumberofsnowcoverdayswilldecreaseinthenorthernlowlands,andsnowfallwillincreaseintheQinghai-XizangPlateau,highmountains,andthelowerreachesoftheChangjiang（Yangtze）River.

简介：ＡＮＯＶＥＲＶＩＥＷＯＮＴＨＥＲＥＳＥＡＲＣＨＰＲＯＧＲＥＳＳＯＦＳＯＭＥＡＳＰＥＣＴＳＯＦＡＴＭＯＳＰＨＥＲＩＣＳＣＩＥＮＣＥＳＩＮＣＡＭＳＤＵＲＩＮＧＬＡＳＴＦＩＶＥＹＥＡＲＳＣｈｅｎＬｉａｎｓｈｏｕ（陈联寿）ＡＮＯＶＥＲＶＩＥＷＯＮＴＨＥＲＥＳ...

简介：BasedonChina'smonthlyprecipitationdatafrom1950to2000andbyusingtheZ-index,4categoriesoffloodwereestimated.VariationandchangeoffloodinSouthChinawereanalyzedintermsofpercentageareasofflood.ThisstudyrevealsthatfloodareasinSouthChinahadaslightlydecreasingtrendinthelatest50years.Duringthewinterhalfyear,however,itdisplayedanincreasingtrend,especiallysincethe1990's.ItisalsofoundthatfloodareasdecreasedduringthesummerhalfyearfromApriltoSeptember,butincreasedduringsummer,especiallysincethe1990's.Intheannuallyfirstseasonofprecipitation,thefloodareahasadecreasingtrend,butithasastronglyincreasingtrendintheannuallysecondseason.Thegradualwettrendduringthewinter-halfyearresultsinwetterclimateconditionforSouthChina,whichwillbemorefavorableforspreadingsomeoftheepidemicpathogenicbacterium,cropdiseasesandinsectpests.

简介：Ananalysisofhigh-resolutionprecipitationdatafor1978-2006indicatesthattheprecipitationoversouthernChinainJuneexperiencedalow-valueperiodin1980-1989andahigh-valueperiodin1992-2001.Italsorevealsthatexceptionalheavy(light)precipitationoccurredinJune2005(2004)since1951.Forthesevariationsonbothinterdecadalandinterannualtimescales,fairlyuniformanomaliesofprecipitationappearedoverVietnam,southernChina,andsoutheasternChina.Correspondingtopositive(negative)precipitationanomalies,anomaloussoutheasterly(northwesterly)flowat850hPareachedVietnamandanomaloussouthwesterly(northeasterly)flowexpandedtothecoastalregionsofsouthernandsoutheasternChina.Precedenttothepositive(negative)precipitationanomaliesduring1992-2001(1980-1989),positive(negative)anomaliesofseasurfacetemperatureappearedovertheextratropicalnorthwesternPacificinthewinterandspringseasons,associatedwithastrong(weak)extensionofthewarmKuroshioCurrentthataffectsthecoastalregionofeasternChina.Theabove-normalprecipitationinJune2005wasassociatedwiththepseudo-ENSOeventinthepreviouswinter,andthebelow-normalprecipitationinJune2004wasassociatedwithnegativeanomaliesofseasurfacetemperatureovertheequatorialcentralPacificandpositiveanomaliesovertheequatorialwesternandeasternPacific.

简介：这研究分析了interdecadal变化在日报夏天(JuneAugust)的可变性在东方中国上的降水在时期期间19662005时时使用车站雨计量器数据。结果揭示了那降雨日报变化经历了重要interdecadal变化。在到在Yangtze和黄河之间的长江，以及区域的南方的区域上，到全部的降雨的早上降雨(00001200LST)的百分比以数量，频率和紧张，所有展出增加的interdecadal趋势。在诺思中国上，相反减少趋势被发现。作为结果，日报也介绍的降雨山峰读了interdecadal变化。在在Yangtze和黄河之间的区域上，从有下午(12000000LST)的46个车站有16频率在学习的40年的时期的开始的20年里达到顶点，当仅仅八留在后者时20年。在诺思中国，七个车站经历了相反的变化，它占了车站的大约21%全部的数字。为interdecadal变化在的可能的原因日报特征被讨论。作为在活跃季风的降雨，时期介绍早上日报山峰与在裂缝时期的下午山峰，在在诺思中国(在Yangtze和黄河之间的长江和区域的区域南方)上的活跃季风时期的降雨的减少(增加)可以贡献interdecadal变化在日报降雨可变性。

简介：从雨和Qing王朝的降雪档案基于降水事件的重建(17361911)，主要从中国本地报导出从的干旱/洪水索引数据17362000，并且自从1951，观察数据聚在一起，季风雨线的空间模式在不同时间规模被分析。调查结果显示在北中国和长江的中间降低的活动范围的季风降雨有重要内部年度(例如，57年并且24年)象一样内部十(例如，2030年并且quasi-10-yr)变化信号。在这些区域的空间模式也显示出重要周期，例如在6080年的时间规模上，一个颠倒阶段支配全部时期从17362000；在quasi-30-yr时间规模上，一个一致阶段从1736～2000是流行的；并且在一20年的时间可伸缩，夏天季风雨在1870前后显示出不同空间模式。

简介：TheKotoda-Bortan(KB)model(LiuandKotoda1998)usedforestimatingevapotranspirationwasmodified.ThemonthlyevapotranspirationforvarioussurfacesintheYangtzeDelta(118-123■,28-33■)wascalculatedusingthemodifiedmodel,andtheannualregionalaverageofevapotranspirationfrom1961to1998wasobtainedusingaweightingmethod.Thespatialandtemporaldistributioncharacteristicsofevapotranspirationwereanalyzed.Itisfoundthattheregionalaveragedannualevapotranspirationhasadecreasingtrendoverthepast40years;thevaluedroppedbyabout24mmfrom1961to1998.Themainreasonforthistendencyisduetothechangeoflandsurfacecondition.Comparedwiththecaseof1980,thecurrentproportionsofpaddyfield,farmlandandwatersurfacehavedecreasedby1.353%,4.42%and2.597%respectively,whiletheproportionsofurbanareaandnon-agriculturelandhaveincreasedby3.345%.Thesechangesclearlyresultinadecreaseoftheregionalaveragedevapotranspiration.

简介：Basedonfourtree-ringchronologieswhichwasanalyscdwithappropriatecollectionandaccuratedatinginthemiddleTibetanPlateau,anessentialprocedureonreconstructionofpastclimatehasbeenpointedoutinthispaper.First,theresponsefunctionofeachdendrochronologyhasbeenbuiltandusedtoestimatehowring-widthgrowthrespondstovariationsinmonthlyclimaticchange.Second,theclimatefactorswhichcouldbeproducedwithdifferenttree-ringserieshavebeenselected.Then,thetransferfunctionequation,includinganewsetoforthogonalvariables,canbeusedtoreconstructlocalpasttemperatureorprecipitation.Itshouldbeemphasizedthatpriorgrowthhasbeenconsideredintherelationshipbetweenclimatefactorandtree-ringchronology,Besides,somedifferentperiodsforcalibrationandverificationhavebeendivided.Andsomestatisticsandotherkindsofproxydatahavebeenadoptedastestapproaches.Asaresult,thevariationsofairtemperatureduringthelast600yearsandprecipitationduringthelast340yearswerereconstructedbycombiningthesametypesoftree-ringseriesinthemiddleTibet.

简介：AsimulationofclimatechangetrendsoverNorthChinainthepast50yearsandfuture30yearswasperformedwiththeactualgreenhousegasconcentrationandIPCCSRESB2scenarioconcentrationbyIAP/LASGGOALS4.0(GlobalOcean-Atmosphere-Landsystemcoupledmodel),developedbytheStateKeyLaboratoryofNumericalModellingforAtmosphericSciencesandGeophysicalFluidDynamics(LASG),InstituteofAtmosphericPhysics(IAP),ChineseAcademyofSciences(CAS).Inordertovalidatethemodel,themodernclimateduring1951-2000wasfirstsimulatedbytheGOALSmodelwiththeactualgreenhousegasconcentration,andthesimulationresultswerecomparedwithobserveddata.Thesimulationresultsbasicallyreproducethelowertemperaturefromthe1960stomid-19?0sandthewarmingfromthe1980sfortheglobeandNorthernHemisphere,andbettertheimportantcold(1950-1976)andwarm(1977-2000)periodsinthepast50yearsoverNorthChina.Thecorrelationcoefficientis0.34betweensimulationsandobservations(significantatamorethan0.05confidencelevel).TherangeofwintertemperaturedeparturesforNorthChinaisbetweenthosefortheeasternandwesternChina'sMainland.Meanwhile,thesummerprecipitationtrendturningaroundthe1980sisalsosuccessfullysimulated.Theclimatechangetrendsinthefuture30yearsweresimulatedwiththeCO_2concentrationunderIPCCSRES-B2emissionscenario.Theresultsshowthat,inthefuture30years,wintertemperaturewillkeepawarmingtrendinNorthChinaandincreasebyabout2.5℃relativetoclimatemean(1960-1990).Meanwhile,summerprecipitationwillobviouslyincreaseinNorthChinaanddecreaseinSouthChina,displayingasouth-deficit-north-excessivepatternofprecipitation.

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简介：Withtheseriesofannualandseasonaltemperatureduring1957-2001inDongguan,Guangdong,thestatisticalcharacteristicandpowerspectrumandseculartrendandsuddenchangephenomenaarecomputedinthispaper.Fromtheresultsitisknownthat(1)thetemperatureshaveobviouscharacteristicsofmonsoonclimatebutdonothavenormaldistribution,showingbiaseddistributionofhighorlowkurtosis;(2)overtherecenthalf-century,thetemperaturestendtorise,speciallyinthelast10years,inwhichmeantemperaturehavequicklyascendedbyabout1.5°C,andexceptforthespring,thereweresuddenchangeofseasonaltemperaturerisingfromthe1980'sto1990's,whichreallyreflectedtheinfluenceofdevelopingandopeningandurbanizationonDongguantemperature;(3)exceptforthespring,thetemperatureofotherseasonsshowsomeoscillatoryperiodsinDongguanandsomeofthemalsoincludelong-termvariationtrends.

简介：降水的变化特征在冬季期间(在10月和下列三月之间，此后被叫作“就冬季”)在广东省在过去的50年期间(从1957～2006)并且与和平的SST的关系用实验直角的功能(文件结束)分析，小浪分析，和关联分析的方法被学习。结果证明广东降水在冬季期间展出40年和2年的伪周期的重要摆动；降雨比从1970年代中是从到1970年代并且从到礼品的1990年代的结束的开始的1950年代的结束的更少到1990年代中。持续干旱的频率多于在冬季期间泛滥支撑。广东降水在期间这次时期在到赤道的中央、东方的和平的SST的显著地积极的关联，但是在与菲律宾的海的西方、北的和平的SST东方的显著地否定的关联。61.5%持续干旱发生在Ni(n)o3.4索引的否定异例的阶段并且38.5%在积极的阶段。大气的循环的合成分析为与持续干旱联系的Ni(n)o3.4区域的积极、否定的阶段被执行。结果证明一个弱极的旋涡，在欧洲的强壮的马槽和一条山脉接近巴尔克哈什·莱克，活跃冷空气和在底层控制广东的一致的在北方的风异例，在亚洲大陆的低中间的纬度的不活跃的西的低骚乱，并且一个弱南部的分支西的马槽，都是为持续干旱的相互的原因。

简介：ＡＳＴＵＤＹＯＮＴＨＥＶＡＲＩＡＴＩＯＮＳＯＦＡＮＮＵＡＬＦＲＥＱＵＥＮＣＹＦＯＲＴＲＯＰＩＣＡＬＣＹＣＬＯＮＥＩＮＮＯＲＴＨＷＥＳＴＰＡＣＩＦＩＣＤＵＲＩＮＧＴＨＥＬＡＳＴＨＵＮＤＲＥＤＹＥＡＲＳ￥ＺｈａｎｇＧｕａｎｇｚｈｉ，ＺｈａｎｇＸｉａｎｇｏ...

简介：AnthropogenicinfluencesonregionalclimateandwaterresourcesoverEastAsiaaresimulatedbyusingaregionalmodelnestedtoaglobalmodel.Thechangesoflanduse/landcover(LULC)andCO2concentrationareconsidered.TheresultsshowthatvariationsofLULCandCO2concentrationduringthepast130yearscausedawarmingtrendinmanyregionsofEastAsia.ThemostremarkabletemperatureincreaseoccurredinInnerMongolia,NortheastandNorthChina,whereastemperaturedecreasedinGansuProvinceandnorthofSichuanProvince.LULCandCO2changesoverthepast130yearsresultedinadecreasingtrendofprecipitationintheHuaiheRivervalley,ShandongByland,andYunnan-GuizhouPlateau,butprecipitationincreasedalongthemiddlereachesoftheYangtzeRiver,themiddlereachesoftheYellowRiver,andpartsofSouthChina.ThispatternofprecipitationchangewithchangesinsurfaceevapotranspirationmayhavecausedamoreseveredroughtinthelowerreachesoftheYellowRiverandtheHuaiheRivervalley.Thedroughttrend,however,weakenedinthemidandupperreachesoftheYellowRivervalley,andtheYangtzeRivervalleyfloodswereincreasing.Inaddition,changesinLULCandCO2concentrationduringthepast130yearsledtoadjustmentsintheEastAsianmonsooncirculation,whichfurtheraffectedwatervaportransportandbudget,makingNorthChinawarmanddry,theSichuanbasincoldandwet,andEastChinawarmandwet.

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