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1.
塔克拉玛干沙漠腹地晚冰期以来的环境与气候变化   总被引:6,自引:1,他引:6  
通过对塔克拉玛干沙漠腹地地层剖面的沉积类型、孢粉、pH值、有机质、CaCO_3和地球化学气候指标C等分析,认为本区晚冰期以来一直处于荒漠环境,气候变化可划出四个阶段:13-10kaB.P.气候寒冷。温凉,干旱,湿度相对后期较大;10-8kaB.P.气候温暖干旱,湿度相对减小;8-3kaB.P.气候炎热干旱,湿度最小;3kaB.P.至今气候温暖干旱,湿度较前增大,气候及环境与今相似。  相似文献   

2.
根据全新世沉积重矿物组合与古土壤养分分析的结果,认为毛乌素沙地全新世沉积环境有过多次正逆变化:11-10kaB。P.、8500-5000aB,P.、4000-3500aB.P.、2700-2000aB,P.以及1500-1000aB.P.时期气候较为潮湿,土壤、植被发育较好,化学风化作用较强,风沙活动受到限制,为相对低能的沉积环境。介于其间的时期则分别为机械风化作用占优势的高能沉积环境,土壤风蚀严重,气候较为干燥。  相似文献   

3.
内蒙古岱海气候环境演变的沉积记录   总被引:4,自引:0,他引:4  
根据对岱海湖泊岩芯沉积物的有机碳同位素,碳酸盐和磁化率等指标的综合分析,讨论岱海近1000年的气候环境演化过程,结果表明:980aB.P-730aB.P.,气候以暖湿为主,岱海为高湖而期;730aB.P.-480aB.P.,以冷偏干气候为主;480aB.P.-270B.P.,湖而急剧下降,气候冷偏湿转冷干气候;270aB.P.-110aB.p.,湖泊收缩,以温干气候为主;110aB.P.以来,有效  相似文献   

4.
策勒绿洲与荒漠交错带达木沟剖面地化元素分布与古气候   总被引:6,自引:2,他引:4  
策勒绿洲与荒漠交错带的达木沟剖面地化元素的分布及古气候意义的研究表明,虽然近四千来来气候的干旱状况持续未变,但其间仍有若干次相对湿润与干旱化加剧的波动。以200aBP为界,其前以相对湿润为主,而其后则以持续干旱为主要特征,且存在三次干旱化程度加剧时期,即1500aBP,1200aBP和1000aBP。  相似文献   

5.
钟巍  熊黑钢 《中国沙漠》1999,19(4):343-347
策勒绿洲沉积地层及地球化学元素的研究表明,虽然近4 ka B.P.来本地区气候环境的干旱状况持续未变,但期间仍有若干次相对湿润与干旱化加剧时期的波动。结合年代学的研究,以约2 000 aB.P.为界,其以前气候以相对湿润为主,而此以后,则以持续干旱为主要特征,且揭示出4 次具有突变性质的气候转干时期,即自约1 500a B.P.开始,类似本地区现今气候环境特征已经出现,自约1 200 a B.P.至1 000 a B.P.、1 000 a B.P.至630 aB.P.期间和200 a B.P.以后,策勒地区沙漠化进程急剧加强。本研究揭示了4 ka B.P.来本地区持续干旱化的特征,并有后期加剧的趋势,而上述气候的转干事件与塔里木盆地古城废弃事件之间具有良好的吻合关系,表明气候环境的自然演化是影响人地关系的重要因素之一。  相似文献   

6.
贡嘎山地区全新世的冰川变化、气候变化与河谷阶地发育   总被引:11,自引:0,他引:11  
本区冰川变化与河谷阶地发育关系密切,全新世初气候转暖,冰川逐步后退,形成第四级河流阶地(T4下部),全新世中期的高温期(7500-4000aBP)冰川强烈消融,形成第四级阶地(T4中上部)<7420±90aBP;全新世晚期气候转冷,新冰期可分出三次冰进:前观景台冰进>3080±80aBP,观景台冰进1550±80-2350±65aBP,海螺沟冰进940±85-780±90aBP,相应出现T3>3000aBP,T21200±70-2170±60aBP,T1930±70aBP,现在小冰期最早出现在400年前,有3次波动,相当于公元1603-1650;1751-1800;1851-1900;三次气候寒冷期。  相似文献   

7.
贡嘎山区在全新世初期(10000-7500aBP),气候渐暖,冰川后退,泥石流发生频次剧增;中期(7500-4000aBP),出现高温气候,冰川强烈后退,沉积物则以冰水河流相为主;晚期(<4000aBP),气候转冷,出现新冰期。嗣后,气候转暖,但有三次明显的冰进过程;400aBP前,气候再度转冷,出现小冰期。大量的泥石流点是出现在气候转暖、冰川退缩的初始阶段。  相似文献   

8.
根据对岱海湖泊岩芯沉积物的有机碳同位素、碳酸盐和磁化率等指标的综合分析,讨论岱海近1000 年来的气候环境演化过程,结果表明:980a B P~730a B P,气候以暖湿为主,岱海为高湖面期;730a B P~480a B P,以冷偏干气候为主;480a B P~270a B P,湖面急剧下降,气候冷偏湿转冷干气候;270a B P~110a B P,湖泊收缩,以温干气候为主;110a B P以来,有效降水略有增加,以凉偏湿气候为主。同时分析近年来气候向温干变化的总趋势。  相似文献   

9.
末次盛冰期时,太行山区的植被以草原为主,森林覆盖率低于10%或更少;17000-10000aB.P.是一快速增温时期,森林覆盖率已比现在高,达20%-30%;10000-8000aB.P.的早全新世,森林植被进一步扩展,达20%-40%,太行山北段高于南段;8000-5000aB.P.是太行山森林覆盖度最好的时期,约50%或更多,但太行山南段的森林已开始遭到人类活动有选择的破坏;5000-2500aB.P.植被略有减少;2500aB.P.至今,在人类活动和气候变凉干的作用下,太行山区的森林遭到毁灭性的破坏,1949年之前,森林覆盖率降至5%以下,解放后封山育林,森林覆盖率虽有所恢复,也仅11.6%。植树造林仍是太行山区持续发展、生态建设的重要任务。  相似文献   

10.
大小兴安岭高位泥炭孢粉纪录及泥炭发育和演替过程研究   总被引:9,自引:2,他引:9  
夏玉梅 《地理科学》1996,16(4):337-344
根据3个高位泥炭剖面孢粉分析和^14C测年数据,以及植物残体、微量元素与营养元素等分析相互印证,揭示大小安岭分别5000a B.P.和2700a B.P.以来孢粉组合特征和植物群与气候演变过程。分析表明大小兴安岭高位泥炭形成了低、中和高位发育阶段的演变,大兴安岭高位泥形成晚于小兴安岭。1300a B.P.大小兴安岭普遍发育高位泥炭。该区图强和汤北(94-A)高位泥炭剖面分别是大小兴安岭高位泥炭标准  相似文献   

11.
BOOK REVIEWS     
Book Reviewed in this article: Development and Environment in Peninsular Malaysia . S. Robert Aiken, Colin H. Leigh, Thomas R. Leinbach, Michael R. Moss. The Rural-Urban Fringe: Canadian Perspectives . Ken B. Beesley and Lorne H. Russwurm, eds. Women and Development . Lourdes Benería, ed. The Border that Joins: Mexican Migrants and U.S. Responsibility . Peter G. Brown and Henry Shue, eds. Cities of the World: World Regional Urban Development . Stanley D. Brunn and Jack L. Williams, eds. Time Resources, Society, and Ecology: On the Capacity for Human Interaction in Space and Time (Vol. I, Preindustrial Societies). Tommy Carlstein. Urban Geography . David Clark. Spanish City Planning in North America . Dora P. Crouch, Daniel J. Garr, and Axel I. Mundigo. Not On Our Street: Community Attitudes to Mental Health Care . M. J. Dear and S. M. Taylor Unequal growth: Urban and Regional Employment Change in the U.K. Stephen Fothergill and Graham Gudgin. Agricultural Land in an Urban Society . Owen J. Furuseth and John T. Pierce. The Petroleum Industry in Oil-Importing Developing Countries . Fariborz Ghadar. Historical Understanding in Geography, An Idealist Approach . Leonard Guelke. Regional Planning in Europe . R. Hudson and J. R. Lewis, eds. Remote Sensing for Resource Management . Chris J. Johannsen and James L. Sanders, eds. Geography and The State . R. J. Johnston. Texas Graveyards: a Cultural Legacy . Tlrry G. Jordan. The Politics of Location: An Introduction . Andrew Kirby. A Social Geography of the City . David Ley. Energy and the Future . Douglas MacLean and Peter Brown, eds. The Natural Environment of Newfoundland Past and Present . A. G. Macpherson and J. B. Macpherson, eds. Tourism: Economic, Physical and Social Impacts . Alister Mathieson and Geoffrey Wall. Railroads and Land Grant Policy: A Study in Government Intervention . Lloyd J. Mercer. Progress in Rural Geography . Michael Pacione, ed. Progress in Urban Geography . Michael Pacione, ed. Models of Spatial Inequality: Settlement Patterns in Historical Archaeology . Robert Paynter. Natural Hazard Risk Assessment and Public Policy, Anticipating the Unexpected . William J. Petak and Arthur A. Atkisson. The Nature of Geomorphology . Alistair F. Pitty. Regional Conflict and National Policy . Kent A. Price Women and Spatial Change: Learning Resources for Social Science Courses . Arlene C. Rengert and Janice J. Monk, eds. Urban and Regional Analysis for Development Planning . Richard Rhoda. Rivers: Form and Process in Alluvial Channels . Keith Richards. This Remarkable Continent: An Atlas of United States and Canadian Society and Culture . John F. Rooney, Jr., Wilbur Zelinsky, and Dean R. Louder, gen. eds. The Origins of Open-Field Agriculture . Trevor Rowley, ed. Residential Location Determinants of the Older Population . Gundars Rudzitis. Borderland Sourcebook: A Guide to the Literature on Northern Mexico and the American Southwest . Ellwyn R. Stoddard, Richard L. Nostrand, and Jonathan P. West, eds. Arctic and Antarctic . David Sugden. Tall Timbers Ecology and Management Conference, February 22–24, 1979, Proceedings No. 16 . Graphic Communication and Design in Contemporary Cartography (Progress in Contemporary Cartography , Vol. II). D. R. Fraser Taylor, ed. Living with Energy Shortfall: A Future for American Towns and Cities . Jon Van Til. The United States: Habitation of Hope . J. Wreford Watson. Air Photo Interpretation for Archaeologists . D. R. Wilson. Urban and Rural Change in West Germany . Trevor Wild, ed. Population and Resources . Harry Robinson.  相似文献   

12.
<正>1 Introduction In 2013,Chagusaba,which is traditional tea-grass integrated system in Shizuoka,were accepted as new world heritage site of agriculture.Shizuoka prefecture occupies a variety of elevations,from 0 to 3000m or more above sea level.Because of the diversity of land features and climates,this area produces 167 agricultural commodities.In addition,a lot of traditional agriculture and over200 local native varieties of crops have been conserved in Shizuoka  相似文献   

13.
<正>There are more than 10000 years of agricultural development history in the world that has provided very fruitful and ingenious traditional knowledge and experiences reflecting the evolution of humanity and the nature.In2002,the Food and Agriculture Organization of the United Nations(FAO)initiated an international partnership initiative of"Conservation and Adaptive Management of Globally Important Agricultural Heritage Systems  相似文献   

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BOOK REVIEWS     
Book Reviewed in this article: Geography and the Third World. International Seminar, 14–18 May 1980, Kuala Lumpur, Malaysia . Ishmail Ahmad and Jamaluddin Md Jahi, eds. The Growth Dilemma: Residents' Views and Local Population Change in the United States . Mark Baldassare. Sport and Place: A Geography of Sport in England, Scotland & Wales . John Bale. The Deindustrialization of America: Plant Closings, Community Abandonment, and the Dismantling of Basic Industry . Barry Bluestone and Bennett Harrison. Selected Essays 1963–1975: Carl O. Sauer . Bob Callahen, ed. Housing and Planning in the Countryside . G. Clark. Conflict, Politics and the Urban Scene . Kevin R. Cox and R. J. Johnston, eds. Thematic Maps: Their Design and Production . David J. Cuff and Mark T. Mattson. Wine: A Geographic Appreciation . Harm Jan de Blij. USSR in Maps . J. C. Dewdney. Political Geography: A Contemporary Perspective . Ramesh D. Dikshit. Rethinking Human Adaptation . Rada Dyson-Hudson and Michael A. Little, eds. Sacred Sands: The Struggle for Community in the indiana Dunes . J. Ronald Engel. Geography of the Biosphere . A. Furley and Walter W. Newey. Disaster and Reconstruction . Robert Geipel. Glasgow: The Making of a City . Andrew Gibb. Design for Arid Regions . Giden S. Golany, ed. Urbanization and Cancer Mortality: The United States Experience, 1950–1975 . Michael R. Greenberg. Geology in the Nineteenth Century: Changing Views of a Changing World . Mott T. Greene. Colonización y Destrucción de Bosques en Panamá . Stanley Heckadon Moreno and Alberto McKay, eds. Urban Geography: A First Approach . David T. Herbert and Colin J. Thomas. The Visual and Spatial Structure of Landscapes . Tadahiko Higuchi. Climate from Tree Rings . M. K. Hughes, P. M. Kelly, J. R. Pilcher, and V. C. LaMarche, Jr., eds. The structure of Nineteenth Century Cities . James H. Johnson and Colin G. Pooley, eds. The American Planner: Biographies and Recollections . Donald A. Krueckeberg, ed. Urban Land Policy For the 1980s, the Message for State and Local Government . George Lefcoe, ed. Regional Planning: Evolution, Crisis and Prospects . Gill C. Lim, ed. Relevance and Ethics In Geography . Bruce Mitchell and Dianne Draper. China: The Geography of Development and Modernization . Clifton W. Pannell and Laurence J. C. MA. The Urban Retailing System . Robert B. Potter. Hants. Nonconventional Energy Resources . Philip R. Pryde. Caribbean Migrants: Environment and Human Survival on St. Kitts and Nevis . Bonham C. Richardson. Population and Resources . Harry Robinson. East Los Angeles: History of A Barrio . Ricardo Romo. Integrated Impact Assessment . Frederick A. Rossini and Alan L. Porter, eds. Environmental Aesthetics: Essays in Interpretation . Barry Sadler and Allen Carlson, eds. Earthwatch . Charles Sheffield. Field Techniques and Research Methods in Geography . Robert H. Stoddard. Haiti: Land of Poverty . Robert J. Tata. Weathering and Erosion: Sources and Methods in Geography . Stephen T. Trudgill. Once Beneath the Forest. Prehistoric Terracing in the Río Bec Region of the Maya Lowlands . B. L. Turner, II. The Historical Geography of Scotland since 1707 . David Turnock.  相似文献   

16.
BOOK REVIEWS     
Book Reviewed in this article: The City in Cultural Context . John Agnew, John Mercer, David Sopher, eds. Soils and Geomorphology Peter W. Birkeland. Urbanization and Settlement Systems, International Perspectives . L. S. Bourne, R. Sinclair, and K. Dziewoński. eds. An Introduction to Urban Historical Geography . Harold Carter. Overshoot, The Ecological Basis of Revolutionary Change . William J. Catton, Jr. Rivers of the World . Eberhard Czaya. Jewish Communities in Frontier Societies: Argentina, Australia and South Africa . Daniel J. Elazar with Peter Medding. Color in Public Spaces: Toward a Communication-Based Theory of the Urban Built Environment. Kenneth E. Foote. Spatial Statistics and Models. Gary L. Gaile and Cort J. Willmott, eds. Mega-Geomorphology. Rita Gardner and Helen Scoging, eds. Technological Change and Regional Development. Gillespie, ed. The Arid Lands: Their Use and Abuse. R. L. Heathcote. The Location of Industry in Britain. A. G. Hoare. Groundwater as a Geomorphic Agent . R. G. LaFleur, ed. Rural Public Services: International Comparisons. Richard E. Lonsdale and Gyorgy Enyedi, eds. Saving Water in a Desert City. William E. Martin, Helen M. Ingram, Nancy K. Laney, and Adrian H. Griffin. Water Resources: Distribution, Use and Management. John R. Mather. Transnationals and the Third World: The Struggle for Culture. Armand Mattelart. South Hadley, MA: USGS Digital Cartographic Data Standards. R. B. McEwen, R. E. Witmer, and B. S. Ramey, eds. The Ecosystem Concept in Anthropology. Emilio F. Moran, ed. Boulder, CO: Women, Men, and the International Division of Labor. June Nash and Maria Patricia Fernandez-Kelly, eds. Nuclear Power: Assessing and Managing Hazardous Technology. Martin J. Pasqualetti and K. David Pijawka, eds. Mary Somerville and the Cultivation of Science 1815-1840. Elizabeth Chalmers Patterson. An Introduction to Coastal Geomorphology. John Pethick. Late Quaternary Environments of the United States , Vol. 1, The Late Pleistocene. Stephen C. Porter, ed. Planning and Ecology. R. D. Roberts and T. M. Roberts, eds. Regionalism and the Pacific Northwest. William G. Robbins, Robert J. Frank, and Richard E. Ross, eds. Environment and Health. Anthony J. Rowland and Paul Cooper. Sunbelt/Snowbelt: Urban Development and Regional Restructuring. Larry Sawers and William K. Tabb, eds. The Bad Earth. Environmental Degradation in China. Vaclav Smil. Armonk, NY: Voyage into Substance: Art, Science, Nature, and the Illustrated Travel Account, 1760–1840. Barbara Maria Stafford. The Institute of British Geographers: The First Fifty Years. Robert W. Steel. Visions of the Past. Christopher Taylor and Richard Muir. Glacial Lake Agassiz. J. T. Teller and Lee Clayton, eds. The Tule Breakers: The Story of the California Dredge. John Thompson and Edward A. Dutra. The Balkan City 1400–1900. Nikolai Todorov. Explanation, Prediction and Planning: the Lowry model. Michael J. Webber. Mercedes Reales: Hispanic Land Grants of the Upper Rio Grande Region. Victor Westphall. The World Atlas of Revolutions. Andrew J. M. Wheatcroft. The West European City, A Social Geography. Paul White. Urban Elites and Mass Transportation. J. Allen Whitt. Princeton, NJ: Urban Life In Contemporary China. Martin King Whyte and William L. Parish. The Demand for Energy in the Soviet Union. David Wilson. London and Canberra: Rethinking Geographical Inquiry. J. David Wood, ed.  相似文献   

17.

Reviews of geographic software in this article:

DEMO-GRAPHICS: WORLD POPULATIONS AND PROJECTIONS.

ESP

GAUSS.

CEMODEL S. Damus

LIMDEP. William H. Greene

MICROSTAT 4.1

OTIS

PCIPS. (Personal Computer Image Processing System). H.J. Meyers and R. Bernstein.

REGRESSION ANALYSIS OF TIME SERIES (RATS)

SPSS/PC+

URBAN DATA MANAGEMENT SOFTWARE (UDMS)  相似文献   

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BOOK REVIEWS     
Book Reviewed in this article: Rabat: Urban Apartheid in Morocco . Janet Abu -Lughod . Marketplaces in a Developing Country: The Case of Western Nigeria . Isaac Ayinde Adalemo . Farming Development and Space: A World Agricultural Geography . Bernd Andreae . Section and Party: A Political Geography of American Presidential Elections, from Andrew Jackson to Ronald Reagan . J. Clark Archer and Peter J. Taylor . Women and Space: Ground Rules and Social Maps . Shirley Ardener , ed. European Progress in Spatial Analysis . R. J. Bennett , ed. The Origins of Academic Geography in the United States . Brian W. Blouet Geographic Perspectives on Global Problems . Ronald Reed Boyce . Seasonal Dimensions to Rural Poverty . Robert Chambers , Richard Longhurst and Arnold Pacey eds. The New Nationalism and the Use of Common Spaces: Issues in Marine Pollution and the Exploitation of Antarctica . Jonathan I. Charney , ed. Communications Tomorrow: The Coming of the Information Society . Edward Cornish , ed. The Design of Suburbia . Arthur Edwards . Explorer on the Northern Plains: Lieutenant Gouverneur K. Warren's Preliminary Report of Explorations in Nebraska and Dakota in the Years 1855–56–57. With an Introduction by Frank N. Schubert . The Changing Climate: Responses of the Natural Flora and Fauna . Michael J. Ford . Essentials of Physical Geography . Robert E. Gabler , Robert J. Sager , Sheila Brazier , and Daniel L. Wise. The Road to Jaramillo . William Glen . Valued Environments . John R. Gold and Jacquelin Burgess , eds. Proximity and Preference: Problems in the Multidimensional Analysis of Large Data Sets . Reginald G. Golledge and John N. Rayner , eds. A Search for Common Ground . Peter Gould and Gunnar Olsson , eds. Geography: Its History and Concepts . Arild Holt -Jensen . A Population Geography . Huw R. Jones . The Human Mosaic: A Thematic Introduction to Cultural Geography, 3rd ed. Terry G. Jordan and Lester Rowntree . Urban Social Geography: An Introduction . Paul Knox . The Anatomy of Job Loss: The How, Why and Where of Employment Decline . Doreen Massey and Richard Meegan . The Information Society as Post-Industial Society . Yoneji Masuda . Map Librarianship, 2nd ed. Harold Nichols . India: Cultural Patterns and Processes . Allen G. Noble and Ashok K. Dutt , eds. The God that Limps: Science and Technology in the Eighties . Colin Norman . Geography: An Introductory Perspective . Robert E. Norris , Keith D. Harries and John D. Vitek . The Politics of Technology Assessment . David M. O'Brien and Donald A. Marchand . Ethnic Segregation in Cities . Ceri Peach , Vaughan Robinson and Susan Smith , eds. Churches and Church Membership in the United States, 1980 . Bernard Quinn , Herman Anderson , Martin Bradley , Paul Goetting and Peggy Shriver . Energy in Australia: Politics and Economics . Hugh Saddler . Development from Above or Below? The Dialectics of Regional Planning in Developing Countries . Walter B. Stóuhr and D. R. Fraser Taylor , eds. Human Impact on the Ecosystem . Joy Tivy and Greg O'Hare . Plants and People: Vegetation Change in North America . Thomas R. Vale . The Mapmakers: The Story of the Great Pioneers in Cartography from Antiquity to the Space Age . John Noble Wilford .  相似文献   

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