China's changing landscape during the 1990s : large-scale land transformations estimated with satellite data


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dc.contributor.author Liu, Jiyuan
dc.contributor.author Tian, Hanqin
dc.contributor.author Liu, Mingliang
dc.contributor.author Zhuang, Dafang
dc.contributor.author Melillo, Jerry M.
dc.contributor.author Zhang, Zengxiang
dc.date.accessioned 2010-04-26T18:13:59Z
dc.date.available 2010-04-26T18:13:59Z
dc.date.issued 2005-01-27
dc.identifier.citation Geophysical Research Letters 32 (2005): L02405 en_US
dc.identifier.uri http://hdl.handle.net/1912/3320
dc.description Author Posting. © American Geophysical Union, 2005. This article is posted here by permission of American Geophysical Union for personal use, not for redistribution. The definitive version was published in Geophysical Research Letters 32 (2005): L02405, doi:10.1029/2004GL021649. en_US
dc.description.abstract Land-cover changes in China are being powered by demand for food for its growing population and by the nation's transition from a largely rural society to one in which more than half of its people are expected to live in cities within two decades. Here we use an analysis of remotely sensed data gathered between 1990 and 2000, to map the magnitude and pattern of changes such as the conversion of grasslands and forests to croplands and the loss of croplands to urban expansion. With high-resolution (30 m) imagery from Landsat TM for the entire country, we show that between 1990 and 2000 the cropland area increased by 2.99 million hectares and urban areas increased by 0.82 million hectares. In northern China, large areas of woodlands, grasslands and wetlands were converted to croplands, while in southern China large areas of croplands were converted to urban areas. The land-cover products presented here give the Chinese government and international community, for the first time, an unambiguous understanding of the degree to which the nation's landscape is being altered. Documentation of these changes in a reliable and spatially explicit way forms the foundation for management of China's environment over the coming decades. en_US
dc.description.sponsorship This work has been supported by the Key Project of National Science Foundation of China (90202002), Ministry of Science and Technology (MOST) 973 Program (2002CB412500), the Key Knowledge Innovation Project of the Chinese Academy of Sciences K2CX2-308), NASA Interdisciplinary Science Program (NNG04GM39C), National Science Foundation of China (40128005). en_US
dc.format.mimetype application/pdf
dc.language.iso en_US en_US
dc.publisher American Geophysical Union en_US
dc.relation.uri http://dx.doi.org/10.1029/2004GL021649
dc.title China's changing landscape during the 1990s : large-scale land transformations estimated with satellite data en_US
dc.type Article en_US
dc.identifier.doi 10.1029/2004GL021649

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