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OALib Journal期刊
ISSN: 2333-9721
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长江中下游地区植被覆盖与区域气候变化的关系研究
DOI: 10.3969/j.issn.1000-2006.2013.06.018, PP. 89-95
Keywords: 长江中下游地区,植被覆盖,归一化植被指数(ndvi),区域气候模拟,遥感
Abstract:
以长江中下游为研究区,利用1998―2008年归一化植被指数(ndvi)和1951―2011年基准气象观测资料,借助区域气候模型regcm3和modis遥感,分析测站“点”上植被“覆盖量”、区域“面”上植被“覆盖类型”与气候变化的关系。结果表明:(1)气温、ndvi值有逐年上升的趋势,降水量变化不大。年纪尺度ndvi与气温呈较强正相关,与降水呈弱负相关。(2)在选定的3个植被下垫面中,以农田植被覆盖为主的长三角丘岗城乡交错区年增温最弱。春夏秋季增温趋势从大到小为:赣浙皖山地森林区>鄂皖低山丘陵混合林区>长三角丘岗城乡交错区,冬季则完全相反。春夏秋季节农田植被区的降水量随时间增加显著,森林区的降水量则显著减少,冬季的降水量都有所增加。
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