摘要
天山北坡经济带作物品种多且品种间差异大,气候变化对区域作物结构布局的影响研究对新疆农牧业生产具有积极的指导作用。文中利用2002～2007年天山北坡生长季逐月MODIS归一化植被指数(ND-VI)数字影像,计算了NDVI动态变化与气温、降水变化的相关关系,分析了NDVI变化的区域分异规律,探讨了气温、降水对植被NDVI动态变化的影响。结果表明:气候因子对天山北坡植被的影响沿博格达山-乌鲁木齐-石河子一线南北分异、东西延伸。该线以北区域,包括绿洲与荒漠过渡带降水偏相关性强,主要以降水影响为主;该线以南区域,包括天山中高山带的河流汇集的山谷地带和博格达山南坡复相关性强,为气温和降水的共同作用区域。
There is a variety of crops of different species in the economic zone of the north slope of Tianshan Mountains.Studying on the climate change effects on regional crop structure and layout plays a positive role in guiding Xinjiang＇s agricultural production.By using monthly MODIS normalized difference vegetation index（NDVI） digital images in growing season from 2002 to 2007,the correlation between dynamic changes of NDVI and temperature precipitation was computed.Based on the correlation coefficient,the regional variation distribution of NDVI and impact on NDVI by temperature precipitation were discussed.Results show that,the climatic factors effecting on vegetation were different in north-south and extended in east-west along the line from Bogda Mountain to Urumqi and to Shihezi.There was a strong partial correlation between NDVI and precipitation in the north of the line,including the oasis and desert transitional zone.There was a strong multiple correlation in the south of the line,including river pooled valley in the alpine zone of Tianshan Mountains and the southern slope of Bogda Mountain.It was the interaction region of temperature and precipitation.
出处
《干旱区资源与环境》
CSSCI
CSCD
北大核心
2011年第7期91-95,共5页
Journal of Arid Land Resources and Environment
基金
国家自然科学基金项目(40701148)
沙漠气象科学研究基金项目(SQJ2007009)共同资助
关键词
天山北坡
植被指数
气候因子
空间分异
north slope of Tianshan Mountains
vegetation index
climatic factors
spatial variation
