PRELIMINARY STUDIES ON AIR-BORNE SPORES AND POLLENS IN NORTHERN SUBURB OF BEIJING     

Huang Cixuan Institute of Geography  CAS  Beijing People''s Republic of China 《地理学报(英文版)》1997,(2)

Ａｅｒｏｐａｌｙｎｏｌｏｇｙ,ａｂｒａｎｃｈｏｆｐａｌｙｎｏｌｏｇｙｓｐｅｃｉａｌｌｙｄｅａｌｉｎｇｗｉｔｈａｉｒｂｏｒｎｅｓｐｏｒｏｐｏｌｌｅｎｃｏｎｔｅｎｔａｎｄｉｔｓｖａｒｉａｔｉｏｎｓ,ｉｓｃｌｏｓｅｌｙｒｅｌａｔｅｄｔｏｍａｎｙｄｉｓｃｉｐｌｉｎｅｓｌｉｋｅｐｌａｎｔｇｅｏｇｒａｐｈｙ,ｂｉｏｃｌｉｍａｔｏｌｏｇｙ,ａｇｒｏｎｏｍｙ,ａｎｄｍｅｄｉｃａｌｓｃｉｅｎｃｅｆｏｒｗｈｉｃｈａｌｓｏｎｅｅｄｉｔｓｒｅｓｅａｒｃｈｒｅｓｕｌｔｓ.Ｎｕｍｅｒｏｕｓｒｅｓｅａｒｃｈｅｓｈａｖｅｂｅｅｎｃａ…  相似文献   

ON ECOLOGICAL CHARACTERISTICS, UTILIZATION AND MANAGEMENT OF THE TIBETAN PLATEAU, CHINA     

Yang Qinye Institute of Geography  CAS  Beijing People''s Republic of China 《地理学报(英文版)》1997,(2)

Ｗｉｔｈａｎａｒｅａｏｆ1.2ｍｉｌｌｉｏｎｋｍ2,ａｎｄａｎａｌｔｉｔｕｄｅｏｆ4000ｍ,ｔｈｅＴｉｂｅｔａｎＡｕｔｏｎｏｍｏｕｓＲｅｇｉｏｎｃｏｎｓｔｉｔｕｔｅｓｔｈｅｍａｉｎｐａｒｔｏｆｔｈｅＱｉｎｇｈａｉＴｉｂｅｔａｎＰｌａｔｅａｕ,ｏｎｅｏｆｔｈｅｔｈｒｅｅｎａｔｕｒａｌｒｅａｌｍｓｉｎＣｈｉｎａ.Ｉｔｃｏｎｓｉｓｔｓｏｆａｓｅｒｉｅｓｏｆｈｉｇｈｍｏｕｎｔａｉｎｓａｎｄｈｉｇｈｌａｎｄｓｗｉｔｈｍａｎｙｗｉｄｅｖａｌｌｅｙｓａｎｄｂａｓｉｎｓｓａｎｄｗｉｔｃｈｉｎｇｉｎｂｅｔｗｅｅｎ.ＴｈｅＨ…  相似文献   

GIS APPLICATION IN RESEARCH OF WILDLIFE HABITAT CHANGE——A case study of the Giant Panda in Wolong Nature Reserve   总被引：2，自引：0，他引：2  

Liu Xuehua Institute of Geography  CAS  Beijing People''s Republic of China M.C. Bronsveld A.G. Toxopeus M.S. Kreijns International Institute for Aerospace Survey  Earth Sciences The Netherlands 《地理学报(英文版)》1997,(4)

Ｉ.ＩｎｔｒｏｄｕｃｔｉｏｎＴｈｅＧｉａｎｔＰａｎｄａ(Ａｉｌｕｒｏｐｏｄａｍｅｌａｎｏｌｅｕｅａ)ｉｓａｎｅｎｄａｎｇｅｒｅｄａｎｉｍａｌｓｐｅｃｉｅｓｉｎｔｈｅｗｏｒｌｄ.Ｔｈｅｒｅａｒｅａｂｏｕｔ1000ｉｎｄｉｖｉｄｕａｌｓｌｅｆｔａｎｄｃｏｎｆｉｎｅｄｉｎｔｈｅｉｓｏｌａｔｅｄｍｏｕｎｔａｉｎａｒｅａｓｉｎｔｈｅｓｏｕｔｈｗｅｓｔｅｒｎｐａｒｔｏｆＣｈｉｎａ.Ｉｔｓｒｅｍａｉｎｉｎｇｈａｂｉｔａｔｃｏｖｅｒｓａｂｏｕｔ29,500ｋｍ2[2,6,11].Ｈｕｍａｎｅｎｃｒｏａｃｈｍｅｎｔｉｓｃｏｎｓｉｄｅｒｅ…  相似文献   

Red-light districts and Toleration Zones: geographies of female street prostitution in England and Wales     

Phil Hubbard  Lecturer in Human Geography 《Area》1997,29(2):129-140

Summary Although female street prostitution is widely acknowledged to occur in specific spaces, characteristically referred to as 'red-light' districts, geographers have been remarkably reticent in examining the nature and location of these spaces. Against a backdrop of mounting debate surrounding the legal status of prostitution in England and Wales, this paper considers the importance of such areas in the regulation and containment of street prostitution, and speculates as to how changing social and legal attitudes might result in very different geographies of prostitution.  相似文献   

STUDY ON APPLICATIONS OF C-BAND DUAL LINEAR POLARIZATION RADAR IN METEOROLOGY   总被引：4，自引：0，他引：4       下载免费PDF全文

徐宝祥  王致君  蔡启铭  刘黎平  张鸿发  楚荣忠 《Acta Meteorologica Sinica》1991,(3)

Theoretical study and development of a dual linear polarization weather radar in China are briefly presented.Also discussed are the potential uses of the new radar system in improving the accuracy of areal rainfall measure-ments and analysing the spacial structure of storms and distribution of hydrometecrs in clouds based on theradar observational data from the field experimcnts during the summers of 1987—1989. The results indicatethat a C-band dual polarization weather radar, after considering the microwave attenuation correction, may beemployed to quantitatively measure rainfall and to monitor heavy rain and flood events and becomes an impor-rant means to study storm structure.  相似文献   

FACILITATING REGIONAL SUSTAINABLE DEVELOPMENT THROUGH INTEGRATED MULTI-OBJECTIVE UTILIZATION, MANAGEMENT OF WATER RESOURCES IN THE LANCANG-MEKONG RIVER BASIN     

He Daming Centre for Environmental Evolution  Sustainable Development  Yunnan Institute of Geography  Kunming  China Hsiang te Kung Memphis University  TN  USA 《地理学报(英文版)》1997,(4)

Ｉ.ＨｙｄｒｏｇｅｏｇｒａｐｈｉｃａｌＣｈａｒａｃｔｅｒｉｓｔｉｃｓＴｈｅＬａｎｃａｎｇＭｅｋｏｎｇＲｉｖｅｒｏｒｉｇｉｎａｔｅｓｆｒｏｍａｓｍａｌｌｇｌａｃｉｅｒｏｆ0.4ｋｍ2ｉｎａｒｅａａｔａｎｅｌｅｖａｔｉｏｎｏｆ5167ｍｉｎＬａｓａｉｇｏｎｇｍａＭｏｕｎｔａｉｎ(ａｌｓｏｃａｌｌｅｄＺｈａｉｃｕｏＭｏｕｎｔａｉｎ)ａｔｎｏｒｔｈｅｒｎｆｏｏｔｏｆＴａｎｇｇｕｌａＭｏｕｎｔａｉｎＲａｎｇｅｗｉｔｈｉｎＺａｄｕｏＣｏｕｎｔｙ,ＹｕｓｈｕＴｉｂｅｔａｎＡｕｔｏｎｏｍｏｕｓＰｒｅｆｅｃｔｕｒｅ,Ｑｉｎｇ…  相似文献   

The Earth Charter in Action： A Review on Earth Charter ＋10 Conference in Ahmedabad     

Charlotte Pier 《地理教学》2011,(2):29-31

Earth Charter +10 The 10th anniversary of the Earth Charter has been celebrated with international commemorations throughout the year.The Centre for Environment Education(CEE),incollaboration with Earth Charter International,hosted a 3-day international conference at various locations in the city of Ahmedabad,India,commencing  相似文献   

Latitude-Dependent Response of East Asian Summer Monsoon to External Forcing in the Last Millennium     

GU Yajin  WANG Hongli  LIU Jian 《Acta Meteorologica Sinica》2010,24(6):671-679

Response of the East Asian summer monsoon(EASM) rainfall to external forcing(insolation,volcanic aerosol,and greenhouse gases) is investigated by analysis of a millennium simulation with the coupled climate model ECHO-G.The model reproduces reasonably realistic present-day EASM climatology.The simulated precipitation variation in East Asia over the last millennium compares favorably with the observed and proxy data.It is found that the features and sensitivity of the forced response depend on latitude.On...  相似文献   

兰州-民和盆地第四纪地层学研究   总被引：1，自引：0，他引：1  

顾延生  李长安  谢远云  刘雪梅  蔡雄飞 《地质通报》2001,20(4):384-391

在野外调查和室内分析的基础上,对兰州-民和盆地的晚新生代地层和环境进行了较系统的研究,对第四纪地层进行了地貌学、岩石学、年代学、土壤地层学和古气候学研究,查明了研究区各地貌单元形成时代与物质组成特点、侵蚀期与堆积期的旋回过程及黄土中1.9MaB.P.以来磁化率与古气候、古土壤事件(S26-S0)、古气候演化的周期(45ka、100ka)、特点和黄土中15万年以来短尺度气候事件(H1-9及DO1-10).  相似文献   

晚新生代以来青藏高原中部环境演化过程的地球化学证据   总被引：2，自引：0，他引：2       下载免费PDF全文

陈诗越王苏民  金章东沈吉 《地质学报》2004,78(2):234-241

青藏高原中部发育一系列独立的内流断陷湖盆，其中位于南亚季风区边缘的错鄂湖盆发育了巨厚的湖泊沉积，是研究高原内部地质环境变迁与构造-气候旋回的理想场所。本文对青藏高原中部错鄂孔197m沉积岩心Sr、Rb、Zr含量及其比值以及沉积物有机质δ^13C、TOC含量进行了分析，同时结合岩性、粒度、粘土矿物组成，初步建立了青藏高原中部2．8Ma来岩石化学风化的相对强度和古环境演化过程。研究表明，2．8Ma来青藏高原中部经历了三次剧烈的环境演化过程：在约197～170m(2．8～2．5Ma)之间，低Sr含量，高Rb／Sr和Zr／Rb值记录了较弱的化学风化过程，δ^13C、TOC含量反映气候前期暖干，后期偏凉湿，揭示冷湿气候的云杉林突然增加，沉积岩性明显变粗，反映了一次强烈的构造隆升运动；在约170～38．5m(约2．5～0．8Ma)之间，高Sr含量，低Rb／Sr和Zr／Rb值记录流域经历较强的化学风化过程，δ^13C、TOC含量反映高原中部总体处于温湿或凉湿的环境下，沉积岩性较细，高原总体处于相对剥蚀夷平阶段；在38．5～0m(约0．8～0Ma)段，Sr含量处于相对低值，Rb／Sr值相对较高，化学风化相对较弱，δ^13C、TOC含量表明高原中部处于较寒冷的环境之中，沉积岩性的再次明显变粗表明高原中部又经历了一次强烈的构造运动，并使高原中部整体隆升到4000m以上，奠定了现代高原面的基本格局。  相似文献