2000年～2013年甘南州植被覆盖变化的驱动力研究  

Driving Forces of Vegetation Cover Change in Gannan Prefecture from 2000 to 2013

作　　者：张卓[1,2,3] 孙建国[1,2] 汪秀泽 韩惠[1,2] 张仲荣[1] 

机构地区：[1]兰州交通大学测绘与地理信息学院,兰州730070 [2]甘肃省地理国情监测工程实验室,兰州730070 [3]361287部队,成都610036

出　　处：《遥感信息》2015年第6期89-95,共7页Remote Sensing Information

基　　金：国家自然科学基金项目(41361080);甘肃省科技计划资助项目(1308RJZA124);兰州交通大学科技支撑基金项目(ZC2012006);对地观测技术国家测绘地理信息局重点实验室开放课题(K201308)

摘　　要：针对RESTREND方法在植被覆盖变化研究中应用的局限性,使用孙建国等提出的改进残差趋势法分析了2000年~2013年甘南州植被覆盖变化的驱动力。同时,通过实验对该方法进行验证。方法包括两步：1使用去趋势回归模型分离气候和非气候的作用;2通过外业调查获取一定数量的人类活动强度稳定的像元,基于这些像元上的非气候作用估算所有像元上的大气施肥效应,进而得到人类活动的作用。结果表明,在约占全区面积45%的植被显著增强区,气候变化、大气施肥和人类活动的贡献率约为54%、101%和-55%;在约占全区面积22%的植被显著减弱区,气候变化、大气施肥和人类活动的贡献率约为-21%、-130%和251%。The driving factors of vegetation variation from 2000 to 2013 in Gannan Prefecture are analyzed by improved residuals trend method.At the same time,the method is verified by experiments.The method includes two steps：firstly,use the detrend regression model to differentiate the effect of climate and non-climate;secondly,in order to get the effect of human activities,acquire several pixels with steady intensity of human activities by field study and non-climatic effect of these pixels. The results show that：In the district with vegetation cover significant increase,which account for 45% in whole district,the contributions of climate change,atmospheric fertilization and human activities are 54%,101% and -55%;While in the district with vegetation cover significant decrease,which account for 22% in whole district,the contributions of climate change, atmospheric fertilization and human activities are -21%,-130% and 251%.

关 键 词：RESTREND 植被覆盖变化 大气施肥 气候变化 人类活动 甘南州 

分 类 号：TP79[自动化与计算机技术—检测技术与自动化装置]