Land use changes in Northeast China driven by human activities and climatic variation
Land use changes in Northeast China driven by human activities and climatic variation
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DOI：
10.1007/s11769-009-0225-7
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发表时间：
2009-08
影响因子：
3.4
通讯作者：
Zongming Wang;Zhiming Liu;K. Song;B. Zhang;Sumei Zhang;Dianwei Liu;C. Ren;Fei Yang
中科院分区：
文献类型：
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作者：
Zongming Wang;Zhiming Liu;K. Song;B. Zhang;Sumei Zhang;Dianwei Liu;C. Ren;Fei Yang
人类活动引起的土地利用/覆盖变化(LUCC)是全球环境变化的重要组成部分。因此，在地方、区域和全球尺度上研究土地利用/覆盖及其变化具有重要意义。本文对全国重点农区之一的东北中国地区的土地利用变化进行了研究。从1986年到2000年，根据陆地卫星图像的研究结果，研究区的土地利用/覆盖发生了广泛的变化。草地、沼泽、水体、林地分别减少9864平方公里、3973平方公里、1367平方公里和10052平方公里。相比之下，水田、旱地和建设用地分别扩大了7339km2、17193 km2和700 km2。这些变化与环境，特别是气候变化有着互动关系。一方面，气候变暖为草地和沼泽创造了潜在的环境，因为更多的农作物可以在更温暖的气候中茁壮成长，从而使草地和沼泽变成农田，并使旱田变成水田。另一方面，地表覆盖的变化改变了当地的气候。这些变化反过来又加速了土地退化，对当地环境产生了不利影响。在社会经济驱动力方面，人口增长、区域经济发展、国家和省级政策是土地利用变化的主要驱动因素。
Human-induced land use/cover change (LUCC) forms an important component of global environmental change. Therefore, it is important to study land use/cover and its change at local, regional and global scales. In this paper we conducted the study of land use change in Northeast China, one of the most important agricultural zones of the nation. From 1986 to 2000, according to the study results obtained from Landsat images, widespread changes in land use/cover took place in the study area. Grassland, marsh, water body and woodland decreased by 9864, 3973, 1367 and 10,052km2, respectively. By comparison, paddy field, dry farmland, and built-up land expanded by 7339, 17193 and 700km2, respectively. Those changes bore an interactive relationship with the environment, especially climate change. On the one hand, climate warming created a potential environment for grassland and marsh to be changed to farmland as more crops could thrive in the warmer climate, and for dry farmland to paddy field. On the other hand, the changed surface cover modified the local climate. Those changes, in turn, have adversely influenced the local environment by accelerating land degradation. In terms of socio-economic driving forces, population augment, regional economic development, and national and provincial policies were confirmed as main driving factors for land use change.