简介：麻沙、书坊─—中国古代刻书中心郑衡泌（福建师范大学历史系）福建建阳县有麻沙、书坊，是我国宋、元、明时期著名的刻书中心地之一。麻沙和书坊两地相距仅十千米，所刻书籍具有几乎完全相同的特征，因而人们常将这两地所刻书籍统称为“麻沙本”又称为“建本”。其刻书兴...

简介：福安，简称韩城，位于福建省东北部三都澳北岸。东经１１９°２３′～１１９°５２′，北纬２６°４１′～２７°２４′。东邻柘荣、霞浦，西接周宁、宁德，南临东海三沙湾，北界寿宁和浙江省的泰顺县。地处闽东各县市的中心，是闽东经济、文化、交通的中心、闽东北和浙南...

简介：通过对福州市不同功能区域降雨径流水质的现场监测,研究福州市中心城区的非点源污染特征.结果表明,福州市降雨径流中部分污染物的平均浓度超过了地表水环境质量标准中的Ⅴ类指标,尤其是CODcr.降雨初期,径流污染物浓度较高,并随着降雨历时的延长而逐渐下降并趋于稳定.不同功能区的污染物平均浓度变异较大,其中交通区和工业区相对其他区域污染较为严重.

简介：10月15日,省国土资源厅党组理论学习中心组开展集体学习。厅党组理论学习中心组学习了习近平总书记在全国教育大会上的重要讲话精神和习近平总书记在中央全面依法治国委员会第一次会议上的重要讲话精神。厅领导围绕深入学习习近平总书记在深入推进东北振兴座谈会上的重要讲话精神和在黑龙江考察时的重要指示精神,结合分管工作实际开展了专题研讨。

简介：中共北京市委、北京市人民政府:你们《关于报请审批〈北京城市副中心控制性详细规划(街区层面)(2016年-2035年)〉的请示》收悉。现批复如下.

简介：［1］AnZS,WeiLY,LuYC,1985,ApreliminarystudyofsoilstratigraphyinLuochuanloessprofile.QuaternarySciences,6(1):166-173.(inChinese)［2］AnZS,KutzbacchJE,PrellWLetal.,2001.EvolutionofAsianmonsoonsandphasedupliftoftheHimalaya-TibetanplateausinceLateMiocenetimes.Nature,411:62-66.［3］BarbaraAM,1995.PalaeorainfallreconstructionsfrompedogenicmagneticsusceptibilityvariationintheChineseloessandpalaeosol.QuaternaryResearch,44(3):383-391.［4］DerbyshireE,MengXM,KempRA,1998.Provenance,transportandcharacteristicsofmodemaeoliandustinwesternGansuProvince,China,andinterpretationoftheQuaternaryloessrecord.JournalofAridEnvironments,39:497-516.［5］DingZL,LiuDS,LiuXMetal.,1989.37cyclessince2.5Ma.ChineseScienceBulletin,34(19):1494-1496.［6］DingZL,RutterNW,SunJMetal.,2000.Re-arrangementofatmosphericcirculationatabout2.6MaovernorthernChina:evidencefromgrainsizerecordsofloess-palaeosolandredclaysequences.QuaternaryScienceReviews,19:547-558.［7］DuJ,ZhaoJB,2004.SoilerosionregularitysinceHoloceneinShaolingtablelandofChang′an.JournalofDesertResearch,24(1):63-67.(inChinese)［8］FengZD,WangHB,OlsonCetal.,2004.Chronolgicaldiscordbetweenthelastinterglacialpaleosol(S1)anditsparentmaterialintheChineseLoessPlateau.QuaternaryInternational,117:17-26.［9］GuoZT,LiuDS,FedoroffNetal.,1998.ClimateextremesinloessofChinacoupledwiththestrengthofdeep-waterformationintheNorthAtlantic.GlobalandPlanetaryChange,18:113-128.［10］GuoZT,WillamFRuddiman,HaoQZetal.,2002.OnsetofAsiandesertificationby22MyragoinferredfromloessdepositsinChina.Nature,416:159-163.［11］HeinrichH,1988.OriginandconsequenceofcycliciceraftinginthenortheastAtlanticOceanduringpast130000years.QuaternaryResearch,29:142-152.［12］KempRA,DerbyshireE,

简介：Glacierinventorycompilationduringthepast20yearsandmodificationsofthatfortheEasternPamirandBanggongLakeindicatethatthereare46,342modernglacierswithatotalareaandvolumeof59415km2and5601km3respectivelyinChina.Theseglacierscanbeclassifiedintomaritimeandcontinental(includingsub-continentalandextremelycontinental)types.ResearchesshowthatglaciersinChinahavebeenretreatingsincetheLittleIceAgeandthemasswastagewasacceleratedduringthepast30to40years.BeinganimportantpartofglaciologicalstudiesinChina,icecoreclimaticandenvironmentalstudiesonTibetanPlateauandintheAntarcticahaveprovidedabundant,highresolutioninformationaboutpastclimaticandenvironmentalevolutionovertheTibetanPlateauandAntarctica.ExceptfordifferentparametersrecordedinicecoresrelatingtoclimateandenvironmentchangesonTibetanPlateau,recordsfromicecoresextractedfromdifferentglaciersshowthatthediscrepanciesinclimaticandenvironmentalchangesonthenorthandsouthpartsoftheplateaumaybetheconsequenceofdifferentinfluencingeffectsfromterrestrialandsolarsources.GlaciologicalandmeteorologicalphenomenaimplythatLambertGlaciervalleyisanimportantboundaryofclimateintheeastAntarctica,whichisthoughttobeconnectedwithcyclonicactivitiesandCircum-polarWavesovertheAntarctica.

简介：PermafrostinChinaincludeshighlatitudepermafrostinnortheasternChina,alpinepermafrostinnorthwesternChinaandhighplateaupermafrostontheTibetanPlateau.Thehighaltitudepermafrostisabout92%ofthetotalpermafrostareainChina.Thesouthboundaryorlowerlimitoftheseasonallyfrozengroundisdefinedinaccordancewiththe0℃isothermallineofmeanairtemperatureinJanuary,whichisroughlycorrespondingtothelineextendingfromtheQinlingMountainstotheHuaiheRiverintheeastandtothesoutheastboundaryoftheTibetanPlateauinthewest.SeasonalfrozengroundoccursinlargepartsoftheterritoryinnorthernChina,includingNortheast,North,NorthwestChinaandtheTibetanPlateauexceptforpermafrostregions,andaccountingforabout55%ofthelandareaofChina.Thesouthernlimitofshort-termfrozengroundgenerallyswingssouthandnorthalongthe25°northernlatitudeline,occurringinthewetandwarmsubtropicmonsoonclimaticzone.Itsareaislessthan20%ofthelandareaofChina.

简介：本文阐述了中国亚热带的6个基本特点，亚热带北界和南界的划分问题，生态过渡带和亚热带划分的方法论，综合区划研究的必要性与重要性，以及尚需深入研究的若干重要自然地理界线问题．认为中国的亚热带从广义上说也是一个生态过渡带．深入研究中国亚热带形成的机制及其成因和演变趋势，将有利于整个亚热带的区域可持续发展．目前亚热带划分所用的指标比较初始、简略，亚热带的东部与西部所采用的指标也不完全一致，还需要经过艰苦的探索，提出一个既能反映客观实际，又能与国际研究接轨的较好方案．在亚热带的划分中需要加强新技术和新方法的应用．

简介：据首次全国湿地资源调查统计,我国湿地资源十分丰富,总面积为3848.55×104hm2,湿地陆生野生动物共25目、75科、724种,野生高等植物有225科815属2276种,划分为7个植被型组,16个植被型,180个群系.我国湿地正面临着来自人类的巨大威胁,如人类对湿地的盲目围垦和改造、湿地环境污染、生物资源的过度利用等,导致自然湿地数量持续减少、湿地生态功能退化乃至丧失,已难以保证所在地域生态平衡的需求.根据我国湿地面临的威胁和问题,近期应加强湿地保护立法和管理机构建设,并尽快实施.

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简介：城市湿地公园是生态型城市建设中城市绿地系统和城市水系统的重要组成部分,已引起全社会的普遍重视,并获得广泛发展,尤其在华东地区发展势头较快,但是,指导中国城市湿地公园建设与保护的基础理论研究还比较缺乏。因此,通过统计分析中国城市湿地公园的地理布局特征、发展现状,综合分析了近年来对城市湿地公园的研究视角与最新进展。针对城市湿地公园发展中存在的问题,指出城市湿地公园未来主要的研究方向和内容。

简介：Sandydesertificationislanddegradationcharacterizedbywinderosionmainlyresultedfromtheexcessivehumanactivitiesinarid,semiaridandpartofsub-humidregionsinnorthernChina.Theresearchonsandydesertificationhasexperiencedmorethan5decadesofarduouscourseofthestrugglealongwiththeestablishmentanddevelopmentofChina′sdesertscience.Researchesinthisfieldhavemadeagreatcontributiontothenationaleconomicconstruction,andenvironmentalprotection.Thispaperfocusesonpresentingthemajorprogressandachievementsinthesandydesertificationresearchduringthelast50years,includingthestagesofstudyonsandydesertification,backgroundenvironmentofsandydesertificationanditschanges,theconception,causes,process,monitoringandassessmentofsandydesertification,thevegetationsuccession,landscapeecology,plantphysiology,impactsonecosystem,high-effectiveuseofwaterandlandresourcesandsustainabledevelopmentinsandydesertifiedregions,sandydesertificationcontrolmodelsandtechniquesetc.

简介：人类对自然界的认识过程总是由浅入深循序渐进的。回顾过去，中国黄土成因经历了从“水成”到“风成”这样一个曲折的认识过程。通过分析黄土成因争论的历程，得到如下启示：1）过去的黄土成因争论源于人们不认识黄土层中的古土壤，因此识别地层中古土壤对重建古地理环境具有重大意义。2）水平层状地层并非都是水平沉积层理，也有可能是古土壤发生层次，具有水平层理的沉积地层则可能意味着在水中沉积形成，而古土壤层则是在地表环境形成。3）古土壤层的特点是古土壤层具有土壤发生层次，因此各层次之间一般呈现为渐变特征。而沉积地层通常具有明显的顶部和底部，显示着截然变化。4）在总结新生代古土壤特点的基础上，重新认识更老地层的古地理环境，发挥古土壤在研究地层成因、重建古气候等方面的作用。

简介：在中国科学院三江平原沼泽湿地生态试验站的毛薹草（Carexlasiocarpa）沼泽中,建成了水位增温协同控制样地。通过水位自动控制设备,实现了沼泽湿地中的原位水位控制,在保持微气候与天然湿地一致的同时,可以对水位进行精确的控制。同时,为了研究全球变化背景下水位与气温对湿地生态系统的协同作用,选择了4种水位（-20cm、-10cm、0cm和10cm）,采用开顶箱（opentopchamber,OTC）被动增温方法,进行水位增温协同控制。在该控制样地中,设置了包括水位与增温交互控制在内的6种处理,每种处理重复布设5个样方,共计30个样方,每个样方的水位独立控制。该控制样地的建成将为湿地生态系统过程与功能的相关研究提供强有力的实验支撑。

简介：AstochasticmodelfordailyprecipitationsimulationinChinawasdevelopedbasedontheframeworkofa′Richardson-type′weathergeneratorthatisanimportanttoolinstudyingimpactsofweather/climateonavarietyofsystemsincludingecosystemandriskassessment.ThepurposeofthisworkistodevelopaweathergeneratorforapplicationsinChina.Thefocusisonprecipitationsimulationsincedeterminationofotherweathervariablessuchastemperatureisdependentonprecipitationsimulation.AframeworkoffirstorderMarkovChainwithGammaDistributionfordailyprecipitationisadoptedinthiswork.Basedonthisframework,fourparametersofprecipitationsimulationforeachmonthat672stationsalloverChinaweredeterminedusingdailyprecipitationdatafrom1961to2000.Comparedwithpreviousworks,ourestimationfortheparameterswasmadeformorestationsandlongerobservations,whichmakestheweathergeneratormoreapplicableandreliable.Spatialdistributionsofthefourparametersareanalyzedinaregionalclimatecontext.Theseasonalvariationsoftheseparametersatfivestationsrepresentingregionaldifferencesarediscussed.Basedontheestimatedmonthlyparametersat672stations,dailyprecipitationsforanyperiodcanbesimulated.A30-yearsimulationwasmadeandcomparedwithobservationsduring1971-2000intermsofannualandmonthlystatistics.Theresultsaresatisfactory,whichdemonstratestheusefulnessoftheweathergenerator.

简介：9月26日，中国第9次北极科学考察队圆满完成历时69天的考察，乘坐“雪龙”号科考船顺利返回上海。这是自然资源部成立后组织实施的首次极地考察，也是完善北极观测网、开展北极业务化观测与监测的重要航次。

简介：本研究通过收集国内已发表的文献中具有凋落物分解常数的数据，采用SPSS13．0软件综合分析中国森林凋落物分解速率的影响因素．结果发现：凋落物类型对凋落物分解速率有显著影响（P〈0．05），凋落叶氮含量与分解速率呈极显著正相关（P〈0．01）．在同一样地的研究中，混合分解的凋落叶分解常数极显著高于单独分解的（P〈0．01）．叶习性对凋落叶分解速率没有显著影响（P〉0．05），但在中国的温带地区则有显著影响（P〈0．05）．在全国尺度上树种组成对凋落物分解速率没有显著影响（P〉0．05）．凋落叶分解速率与经度、年均温和降水量成极显著正相关（P〈0．01），与纬度和海拔成极显著负相关（P〈0．01）．凋落叶分解速率的Q10值为1．768．网袋孔径与土壤类型对凋落叶分解速率亦均有极显著影响（P〈0．01）．

简介：湿地退化、恢复和重建是当前湿地科学领域的研究热点，也是中国湿地研究中的核心问题。作为一种典型的海岸湿地，河口湿地在围垦、水利工程建设和环境污染等多重因素的干扰下，面临着自然来水减少、水盐失衡、植被退化、生境质量下降等多种威胁。介绍了当前中国河口湿地的分布情况以及四大主要河口湿地的退化现状，针对已经开展的河口退化湿地恢复的现状，总结了目前中国河口退化湿地恢复所面临的问题，并展望了今后河口退化湿地恢复研究的趋势：开展河口湿地生态系统演替与退化机制研究；发展河口湿地生态恢复技术；加强河口湿地生态恢复示范研究以及建立动态监测和管理系统。

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