2000-2017年甘南牧区植被变化特征及其影响因子  

Characteristics of Vegetation Change and Influencing Factors in Gannan Pastoral Area from 2000 to 2017

作　　者：敖泽建 王建兵 蒋友严[2] 罗王军 赵惠珍 AO Zejian;WANG Jianbing;JIANG Youyan;LUO Wangjun;ZHAO Huizhen(Gannan Meteorological Bureau of Gansu Province,Hezuo 747000,China;Northwest Regional Climate Center,Lanzhou 730000,China)

机构地区：[1]甘南气象局,甘肃合作747000 [2]西北区域气候中心,甘肃兰州730000

出　　处：《沙漠与绿洲气象》2020年第1期95-100,共6页Desert and Oasis Meteorology

基　　金：甘肃省自然科学基金项目(1506,RJYA189);甘南草原植被变化及其与气象因子的关系研究项目(GNMA2018-01)。

摘　　要：基于MOD13A3数据,建立2000—2017年甘南牧区植被覆盖时空数据集,分析甘南牧区植被的时空分布及其变化特征,并利用同期气象数据探讨气象因子对其影响。结果表明,甘南牧区植被水平上呈南多北少的分布格局,与降水量分布基本一致;垂直分布上南部随海拔升高植被减少,北部随海拔升高植被增加。甘南牧区植被对气温和日照时数的变化反应敏感。总体上,甘南牧区NDVI呈增加的趋势,这与气候变化及人类活动有关;局部地区植被存在减少趋势,这主要与人类活动有关。The data from MOD13A3 was used to set a spatio-temporal dataset on the vegetation coverage of Gannan pastoral area from 2000 to 2017,analyzing the characteristics of spatio-temporal distribution and change of the vegetation coverage of Gannan pasoral area.The effects of meteorological factors on the vegetation coverage of Gannan pasoral area.The results showed that the horizontal distribution pattern of vegetation in Gannan pastoral area was much in the south and less in the north,which was consistent with the spatial distribution of precipitation.The vertical distribution of the vegetation in the south decreased with the increase of elevation,while the vegetation in the north increased with the increase of elevation.Vegetation in Gannan pastoral area was sensitive to the changes of temperature and sunshine hours.The whole vegetation coverage in the Gannan pastoral area showed an increasing trend,which was related to climate change and human activities.There was a decreasing trend of vegetation in some areas,which was mainly related to human activities.

关 键 词：甘南牧区 归一化植被指数 气象因子 相关性 

分 类 号：P463.22[天文地球—大气科学及气象学]