Basic Lithofacies-Succession Model for the Wumishan Cyclothems: Their Markov Chain Analysis and Regularly Vertical Stacking Patterns in the Third-Order Sequences

The Mesoproterozoic Wumishan Formation in the Jixian section of Tianjin is a succession of 3300-m-thick carbonate strata formed in a period of about 100 Ma (1310±20 Ma-1207±10 Ma). In this succession of strata, the carbonate metre-scale cyclic sequences belonging to peritidal type with an approximately symmetrical lithofacies-succession are best developed. The wide development of 1:4 stacking patterns shows that these metre-scale cyclic sequences are genetically related to the short-eccentricity cycles, which are called the Wumishan cyclothems that could truly represent sedimentary cycles. Generally, massive and thick-bedded calcareous dolomites and dolomitic limestones of stromatolite biostromes and thrombolite bioherms constitute the central part of the Wumishan cyclothems. The lower and upper parts consist of tidal flat dolostones, sandy-muddy dolostone and the top part is composed of lagoonal facies dolomitic shales with a paleosol cap. Therefore, an approximately symmetrical lithofacies-successio     

New progress of research on water cycle in atmosphere in China

1 Precipitation characteristics Since the 1980s, Chinese climatologists have conducted a lot of researches on the law of precipitation variation in recent 100 years. Zhang Xiangong et al. (1982)[1], Tu Qipu (1984)[2], Wang Shaowu (1994)[3], Chen Longxun, et al. (1998)[4] have carried out researches on temperature and precipitation changes of the last 100 years in China, viewing that China has the characteristics of cold-wet and warm-dry alternations. Shi Neng et al. (1983) studied the rel…     

CRITICAL ENVIRONMENTAL SITUATION IN THE MIDDLE REACHES OF THE YELLOW RIVER IN CHINA

TheLoessPlateauarealocatedinti1eMiddleReachesoftheYellowffiver(MRYR)isti1ecradleoftheCltinesenationandthesourceoftheancientcivilization.However,dun11galongpenodoftime,unreasonablelanduse,rapidpopulationgrowthandsenousmptiol1damagemadetheoriginalcriticaIenvirorunentevenworsened,deePlyichuencingtheeconowhcdeveloPmrmandtheimProvementoflocalpeople'slivingstandard.Thege0graplticalenvirorul1entisaco11unonandnecessaryextemalcondition.Wthsocialprogressandsciatificandtechnicaldevelopn1Cnt,theconn…     

TEMPORAL AND SPATIAL VARIATION OF EMISSIONFACTORS IN CHINA

1.IntrodctionEnvirorun~lehassionsarebyproduCtsofeconoAncadivihes.ThelevelofedrissionsgenerallyincreasesastheleveIOfeconondcaCtivitiesincreases.AsameasureofpollutioninimsihescausedbyeconoAncaedvihes,aneAnssionfaCtorgenerallytakesthefOrmofarati0bforantOtalpollutantquantityandtotaleconohacaCtivity[l],orThenumerator,totalwaSteorpollthentqUantitymaybemeasuredinwegh,orvoIumeor,somedmes,nuybemulhpliedbyahealthriskfaCtor(tokicityindex)0fthepollutant.Thedenondnator,totaleconothecaCtivities,canbe…     

CHALLENGES AND CORRESPONDING POLICIES FOR CHINA''S URBAN SUSTAINABLE DEVELOPMENT

1.Challengesf0rChina'sUrbanGr0wthandEnvironmentalPr0tecti0nRapidgrowthofeconomyinChinapushedthepr0cessofurbanization.But,ChinaisfacingsomeChallengsinsustainableurbandevelopmentTheyarerefleCtedinthefollowingaspeCts.l.Thef0boinvestIncntisartsult0fthechaUge0frop0nalcc0n0ndccenterSinCel979,ChinahasgoadiodforegncapitalofaboutUS$70.5billion,89.6Peratofthamwereinvestalintheeastemcoastalmpon,espeaallyGuanghongShanthe,FuJiareLiaOning,BoptwJiangru,ShandongandTanin.Asthesefordgncapitalswerinv…     

SUSTAINABLE AGRICULTURE: ITS STATUS QUO AND TREND IN CHINA

I.IntroduchonTl1eacademic,scientificandpolicymaldngcommunitieshavefocusedconsiderableattentionontheconcePtofsustainabledeve1opmentSustainabledevelopmwtisdefinedas'developlnentthatllleetstheneedsofthepresatfwithoLifcon1prol1hsingti1eabilityoffLifuregenerationstomeetthoseofthefLlture'[26]Alnonghun1anneeds,themostessentialforthepresoforthefuturearefoodandfibre,theproduCtsofagnculture.Atthesan1etime,agriculturehascausedwidespreadenvironlllentalchange,whichhasafeedbacktoitssustainability.Itisnot…     

SOIL SALINITY CONTROL REGARDING SUBSURFACE WATER REGULATION IN NORTH CHINA PLAIN

IIntroductionLocatedinthesemi-hunudandsemi-aridroponsofeastemChina,theNorthChinaPlain(NCP)isoneofthelargesta1luvialp1ainsmChinawithanareaofabout38othousandkm.Ithasacontinedlmonsoonclimatewithanannualpredpitrionof8Oomminthesouthempartandreducingtoabout5OOmminthenorthem.ItfallsinthetyPicawarmteInPeratezonenddeciduousforestandsparseforest/shrubforest.Themainsoiltapesaredriamonsoils,brownsoilsandChaosoils(meadowsoils)affectedbygroundWateractivihesandlandcultiVation,indudingyellowmeadowsoil…     

A STUDY ON THE APPLICATION OF REGIONAL PARAMETERS IN REMOTE SENSING DIGITAL THEMATIC MAPPING

SustainableroponaldevelopmentisdesignatedasthebasicresearchthemewiAnntheglobalscopeforthe2lstcentury.Therefore,tointensifyappiiedresearchesonspatialinformationoftheglobeisofvitalscientificandeconohacsignficancetoresourcesanalysisandmanageTnent,environmentaldapamicmonitoringanddeve1opmotpledng.RemotesensingisaconCenratedrePresentahonofthecomplexofthenatureandinrportaninformationsourceforgeo-sdenceresearchaswell.Hence,itisnotonlypossibletoprofoundlyrevealthedramaticchangesofnaturallawsinmpaphi…     

CHARACTERISTICS AND REGULATION OF WANDERING RIVERS

ＣＨＡＲＡＣＴＥＲＩＳＴＩＣＳＡＮＤＲＥＧＵＬＡＴＩＯＮＯＦＷＡＮＤＥＲＩＮＧＲＩＶＥＲＳＸＩＥＪｉａｎｈｅｎｇ（Ｐｒｏｆｅｓｓｒ，ＭｅｍｂｅｒｏｆｔｈｅＣｈｉｎｅｓｅＥｎｇｉｎｅｅｒｉｎｇＡｃａｄｅｍｙｏｆＳｃｉｅｎｃｅｓ，ＷｕｈａｎＵｎｉｖｅｒｓ...     

世界气象网站园地 (九 )

(一 )PAOS WEATHER CENTER .这是由美国科罗拉多大学创办的《大气与海洋科学计划》 (PROGRAM IN ATMOSPHERE AND OCEANIC SCIENCE)网站的一个组成部分。该网站包括本地区域性天气、全国天气、资料档案和气象教育等栏目。网站中用户可以选择观看 1～ 48小时逐时的区域或全国天气实况和预报，还可看到 1000～ 200hPa各层的 12、 24、 36、 48小时的高空形式分析和预报图。网站还可以通过用户选择，提供美国全国，甚至欧洲大陆的地面观测、卫星云图等历史资料。　　网站站址： http;//weather.colorado.edu/　　(二 )…