简介：TNF希望每个中国人都有自己的“去野“梦想，在专业和大众两条线上引领更多人走出户外。

简介：Basedonmeteorological,hydrological,forest,andgrasslanddatacollectedbylocationobservation,remotesensing,fieldsurveysandrelevantliteratureduring1956to2009,theecologicalenvironmentchangeinnorthernslopeoftheQilianshanMountainswasanalyzedsyntheticallyusingregressionandcorrelationanalyses.Theresultsshowedthatthetemperaturehadanannualvariationrateof0.0334℃·a-1innorthernslopeoftheQilianshanMountainssince1960,andexhibitedaraisingtrend,especiallysince1987.Theannualvariationrateofannualprecipitationwas0.5702mm·a-1,indicatingthattheprecipitationtendedtoincrease.Theclimatehadchangedfromaridtohumidinthisregionsince1976.From1956to2006,theglacierareaofsixinlandriverbasin（Shiyangheriver,Heiheriver,Beidaheriver,Shuleheriver,DangheriverandHalternheriver）andDatongheriverbasininnorthernslopeofQilianshanmountainsdecreasedby17.7%.Thicknessoftheglacierreducedabout5-20m,andthesnowlineroseabout100-140m.TheGlaciericereservesininlandriverbasinofHexidecreasedby11.4%.From1972to2007,27glaciersintheeasternsectionoftheQilianshanMountainsdisappeared.From1956to2009,therunoffchangeinthenorthernslopeoftheQilianshanMountainswasdifferentindifferentregions.TherunoffwasreducedsignificantlyinShiyangheriverbasin,increasedslightlyinHeiheriverbasin,andincreasedobviouslyinShuleheriverbasin.From1958to1988,theareaofdeforestationandfarmingwasmorethan10.0millionha,andtheforestareawasreduced0.6millionha.SincetheQilianshanMountainNatureReservewasestablishedin1989,theforestwasrestoringgraduallybecauseofcontinualprotectionandcultivating,andtheforestareawasincreased9.4millionhafrom1989to2008.Duetohumaninterference,especiallyover-grazingimpact,thequalityofthewood-land,shrub-landandgrass-landinnorthernslopeoftheQilianshanMountainswereinadegradedcondition,whichre

简介：拿Yucheng，在是的山东省的一个典型的农业县一个盒子，应用逻辑回归建模空间地识别影响农田的因素的这研究变化。用在2001和2009的高分辨率形象的二个阶段，学习在20012009获得了陆地使用和农田变化数据。农田被5.14%在时期减少，这被发现，主要由于到森林土地的农田变换并且布满建筑物土地，尽管森林土地的部分和闲置的土地被变换成农田。逻辑回归的结果显示那个地点，人口生长和农民收入是影响农田变换的主要因素，当土壤打字时并且支持弯曲是控制农田变化的分发的主要自然因素。地区性的差别和农田变化的时间空间的变量影响了逻辑回归模型的恰当的能力。巨鸟恰当的测试显示逻辑回归模型给了地区性的陆地使用变化的好解释。逻辑回归分析是一个好工具鉴别影响陆地使用的主要因素由确定改变每个因素的贡献。

简介：TheNorthChinaPlain(NCP)isthemostimportantfoodgrainproducingareainChinaandhassufferedfromseriouswatershortages.Tocapturevariationwateravailability,itisnecessarytohaveananalysisofchangingtrendsinprecipitation.Thisstudy,basedondailyprecipitationdatafrom47representativestationsinNCPrecordspassedthehomogeneitytest,analyzedthetrendandamplitudeofvariationinmonthly,seasonalandannualprecipitation,annualmaximumcontinuousno-raindays,annualraindays,rainfallintensity,andrainfallextremesfrom1960to2007,usingtheMannKendall(M-K)testandSen’sslopeestimator.Itwasfoundthatmonthlyprecipitationinwinterhadasignificantincreasingtrendinmostparts,whilemonthlyprecipitationinJulytoSeptembershowedadecreasingtrendinsomepartsofNCP.Nosignificantchangingtrendwasfoundfortheannual,dryandwetseasonprecipitationandrainfallextremesinthemajorityofNCP.Asignificantdecreasingtrendwasdetectedforthemaximumno-raindurationandannualraindaysinthemajorpartofNCP.ItwasconcludedthatthechangingtrendofprecipitationinNCPhadanapparentseasonalandregionalpattern,i.e.,precipitationshowedanobviousincreasingtrendinwinter,butadecreasingtrendintherainyseason(JulytoSeptember),andthechangingtrendwasmoreapparentinthenorthernpartthaninthesouthernandmiddleparts.Thisimpliesthatwithglobalwarming,seasonalvariationofprecipitationinNCPtendstodeclinewithanincreasingofprecipitationinwinterseason,andadecreasinginrainyseason,particularlyinthesub-humidnorthernpart.

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简介：由在20052007的春天和秋天期间从30架班机在诺思中国上分析在空中的观察，在在诺思中国的各种各样的地点的0.3%过度饱和的喷雾器和云冷凝作用原子核(CCN)的垂直分布的特征被调查。测量采样在象平原，高原，和海那样的不同表面上被进行。结果证明累积模式喷雾器的数字集中比在春天在秋天是更大的，但是颠倒为CCN是真的。这意味着有比100nm小的直径的更多的喷雾器能在春天作为CCN被激活，并且这能导致更高的喷雾器激活效率。在Taihang山附近的平原上的喷雾器激活效率比在秋天在春天是更大的，并且它比在土地上在海上是更大的。在在Bashang高原上的边界层上面的喷雾器激活效率是很低的。基于一阵喷雾器和CCN的否定指数的垂直分布，象在诺思中国上的喷雾器激活效率一样的喷雾器和CCN的一个空间parameterization模型被建议。因为它被喷雾器和周围的大气的条件的地区性的物理、化学的特征主要影响，结果证明喷雾器激活效率不清楚地依赖于高度。吝啬的喷雾器激活效率分别地是0.66，与在春天和秋天的0.70和0.53的价值。

简介：我们评估了在北伊朗在里海附近在Tavalesh区域影响大米鱼耕作的采纳的因素。我们与无限制的问题进行了调查。数据随机从184个回答者(61个采用者和123非采用者)被收集从选择村庄取样了并且分析了使用逻辑回归和多反应分析。家庭尺寸，与一个扩展代理人的接触的数字，在扩展教育活动的参予，在社会机构的会员和农场工人的存在是为大米鱼耕作系统的采纳的最重要的社会经济的因素。另外，经济问题是采用者报导的最普通的问题。象存取的缺乏那样的另外的问题捞食物拨出，鱼的损失，高质量的鱼鱼种和脱水和差的水质量的存取的缺乏对很多个农民也重要。

简介：Inthisarticle,anewdefinitionfortheNorthHuaiheRiverrainyseason(NHRS)ispresentedusingsummerdailyprecipitationinEastChinaandsubtropicalhighridgeaxisat500hPa.BycalculatingtheannualprecipitationamountsintheNHRSandMeiyuoftheYangtze-HuaiheRiversbasin(YHMY)from1961to2009,thedatesofprecipitationbeginningandendingaswellasthedurationofthetworainyseasonsinthe49yearsareanalyzed.AtmosphericcirculationcharacteristicsinpositiveandnegativeprecipitationanomalyyearsduringtheNHRSarealsostudied.Resultsareshownasfollows.(1)ThenewdefinitionfortheNHRSismucheasiertouse.Itinvolvesonlytwometeorologicalfactors,makingitsapplicationmorepractical.ItcanalsodistinguishtworainyperiodsoftheNHRSmoreobjectively.(2)TheaveragedurationoftheNHRSissimilartothatoftheYHMY,exceptthatitsaveragedatesofbeginningandendingareaboutoneweeklaterthanthoseoftheYHMY.TheaverageprecipitationoftheNHRSisslightlylessthanthatoftheYHMY,andtheyearlyprecipitationvariationofthetworainyseasonsaresimilartoeachotherwithnoobviousincreasingordecreasingtrendinthe49years,butwithdistinguisheddecadalandinter-annualvariations.(3)Inpositiveprecipitationanomalyyears,theSouthAsianhighmovesmorenorthwardandmoreeastward,thewesternPacificsubtropicalhighislocatedmorenorthwardandwestward,andthesummermonsoonisstrongerthannormal,resultingintheconvergenceofthewarmandmoistsouthwesterlyairflowfromthewestsideofthesubtropicalhighandthecoldairfromthenorthsideofthenortheasttroughinNorthHuaiheRiverbasin.

简介：BasedonanalysesoftherelationshipbetweenPacificMeridionalMode(PMM)andnumberoftropicalcyclones(TCs)activityoverthewesternNorthPacific,theimpactsofthePMMonTcactivityoverthewesternNorthPacificarestudiedusingnumericalsimulationswithanAtmosphericGeneralCirculationModel(CAM3)ofNationalCenterforAtmosphericResearch(ofUSA).TheresultshowsthatthePMMhasimpactsonthelarge-scalegeneratingenvironmentofTCs,thusaffectingtheirnumberandstrength.ThenumericalsimulationsusingtheNCARCAM3indicatethatwiththeinclusionoftheforcingfromseasurfacetemperature(SST)ofthePMM,thereappearsadecreasedmagnitudeoftheverticalzonalwindshear,largeproportionofrelativehumidity,anomalouswesterlywindatlowlevelsandanomalouseasterlywindathighlevels,inassociationwithanomalouscycloniccirculationatlowlevelsandanomalousanti-cycloniccirculationathighlevelsoverthetropicalwesternPacific.Thus,thePMMprovidesfavorableenvironmentforthetyphoongenesis.Inthesensitivityexperiment,TCshavelargerstrength,lowerSSTatthecenter,strongertangentialwindat850hPaandintensifiedwarmcoresathighlevels.Inthispaper,thesimulationresultsaresimilartothatinthedataanalyses,whichrevealstheimportantimpactofthePMMonTCactivityoverthewesternNorthPacific.

简介：Ontheconditionthatthevelocityratioofcompressivewavetoshearwaveisstableduringthepropagatingprocessofseismicwave,thispaperdevelopsanestimationmethodformediumqualityfactorbasedonsinglestation'straveltimedifferencebetweendirectSandPwavesandthefirstperiodsignalofdirectPwave.8774highSNRwavedataaltogetherrecordedby75stationsareanalyzed.Theresultsshowthat:(1)underthenormalregionalstressfield,thequalityfactorsQmSPinthestabletectonicareaarehigherthanthatintheactivetectonicareaaroundtheWeifang-JiashansectionanditssurroundingareaintheTanlufaultzone;(2)intheJuxian-Tanchengsectiontheseismicwaveattenuationisrelativelyquick,andthemediaisrelativelybroken,suggestingnotectonicstressaccumulation;(3)theXinyi-Sihongsectioniscurrentlylockingandinaccumulatingelasticstrainenergystage,whichhasthedeepenvironmentandconditionsofstrongearthquakegenerationsimilartothoseofthe1668M8.5Tanchengstrongearthquake.

简介：尽管它的起源到目前为止还没到达了一致，山(臼齿牙齿的结构)被记录超过100年了。从MesoproterozoicWumishan形成，Lingyuan，Yanshan区域，诺思中国，和特征和山的地质的含意的山的发现是进一步的当前的学习报告讨论了。这里，山的出现的straitigraphic地平线证明它主要位于Wumishan形成的最高的部分以内，即，石灰石单位。山的四种形态学，即，好纺锤形，碎片，带子，ptigmatic并且榴状(不规则)，被认出并且想了是高度与沉积环境和外形有关。包括氧化物，踪迹元素和C，O和Sr同位素的山的地球化学显示地平线忍受山具有比稀罕的山的邻近的stratigraphic层次的更高的Sr/Ba和Ca/Mg比率，更低的积极13C和高度否定的18O价值岩性学，在Wumishan形成的山的形态学和地球化学建议山主要在浅subtidal发生在暴风雨波浪底附近，它被温暖的温度典型地描绘，oversaturated钙碳酸盐海水并且嗨而且，这里的水藻细菌的偶尔的丰富是为钙淤泥的石灰化有利、为Wumishan形成的山C同位素作文催化的更多，这的山学习很好与Mesoproterozoic带超群，北美洲和Riphean的被相关，西伯利亚，建议山充当对全球变化作出回应的一个沉积记录并且是在前寒武纪的stratigraphic的完美的指示物世界范围的关联。

简介：TodeterminethestudyingregionofChinaTestingCenteroftheCollaboratoryfortheStudyofEarthquakePredictability(CSEP),weadoptedtheEntire-Magnitude-Range(EMR)methodtostudythespatialdistributionofminimummagnitudeofcompleteness(MC)intheNorth-SouthTrendingSeismicBelt(NSTSB)duringtheperiodfromOctober1,2008toMay31,2011.AlsobootstraptestingwasperformedtoestimatetheuncertaintyofMC,i.e.δMC.TheresultsshowthatMC(EMR)=1.6±0.03forthewholeregion.FromthespatialdistributionsofMCwefindthatMCisintherangeofML1.3～2.0formostregions.Specifically,thespatialdistributionofMCisconsistentwiththedistributionofstationsindicatinghighmonitoringlevelinthesouthernpartandlowmonitoringlevelinthenorthernpart.EventslocatedwithlessthanthreestationshavegreatinfluenceonMc.Moreover,theuncertaintyofminimummagnitudeofcompletenessδMCrangesfrom0.07to0.22.ThespatialdistributionofδMCagreeswiththeseismicrate.TheshortertimespanmaycauselargerδMC.

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简介：有CO2的高内容的天然气水池在探索Hailar-Tamtsag盆的中间的差错地区期间被发现。到目前为止有有碳同位素的特征的CO2的这种煤气的水库是特殊的。在学习区域的CO2的稳定的碳同位素与13$C_是相对轻的{CO_2}$C_{CO_2}价值从13.1～8.2。联系的氩气体的40Ar/36Ar价值从916～996，与1.201.26的R/Ra。基于全面分析，在这个学习区域的CO2气体具有外壳披风来源，这被相信。

简介：TheShihugolddeposit,situatedintheTaihangMesozoicorogenoftheNorthChinaCraton(NCC),ishostedbyductile-brittlefaultswithinArcheanmetamorphiccorecomplex.Thedepositischaracterizedbygold-bearingquartz-polymetallicsulfidesveins.TheMapenggranitoidsstockandintermediate-basicdikesintrudedthemetamorphicbasementrocks,andarespatiallyrelatedtogoldmineralization.Detailedlaserablationinductivelycoupledplasmamassspectrometry(LAICP-MS)U-Pbzirconagesofthegraniticrocks,dykesandmineralizedquartzveinsinthestudiedarearevealitsmagmaticandmineralizedhistory.Themineralizedquartzveinscontaininheritedzirconswithagesofabout2.55Gaand1.84Ga,probablycomingfromthebasement.ThesetwoPrecambrianeventsarecoevalwiththoseinotherpartsoftheNCC.TheMapenggranitoidstock,thelargestintrusioninthearea,wasemplacedatca.130Ma,andiscoevalwithmagmaticzirconpopulationsfromdioritesandquartzdioritepophyritesinthesameregion.Theca.130MamagmatismandgoldmineralizationweremostlikelyrelatedtoanunderplatingeventthattookplaceintheTaihangorogenatLateMesozoic.Thetimingofgoldmineralizationwithrespecttofelsicmagmatismintheareaissimilartothoseobservedinothermajorgold-producingprovincesintheNCC.ThisepisodeissimultaneouswiththoseintheeasternmarginofNCC,indicativeofawidespreadlateYanshanianmetallogeniceventthatwasaresponsetotheEarlyCretaceouslithosphereintheeasternNCC,inwhichthemesothermalgolddepositswereformedfromsimilartectono-magmaticenvironments.