气象因子与地表植被生长相关性分析_徐兴奎

第23卷第2期2003年2月生 态 学 报ACT A ECOLOGICA SINICA V o l.23,N o.2Feb.,2003气象因子与地表植被生长相关性分析

徐兴奎,林朝晖,薛　峰,曾庆存

(中国科学院大气物理研究所国际气候和环境科学中心,北京　100029)

基金项目:国家重点基础发展规划研究资助项目(G 1998040900);国家自然科学基金资助项目(40105011,49905004)收稿日期:2001-08-23;修订日期:2002-04-20

作者简介:徐兴奎(1966～),男,黑龙江人,博士。主要从事遥感反演和陆面过程模式研究。E-mail:xk xu@ Foundation item :T he National Key Fundamen tal S tu dy Project (Grant No.G1998040900)and the National Natural Sci-ence Foundation of C hina (Grant Nos .40105011,49905004)

Received date :2001-08-23;Accepted date :2002-04-20

Biography :Xu Xing-Kui,Doctor.M ainly engaged in the rem ote sensin g applications and land su rface models.E-mail:xkxu @

Acknowledgements :Th e au th ors w is h to thank the Distributed Active Arch ive C enter (Code 902.2)at the Goddard Space Flight Center,Gr eenbelt,M D,20771,for pr odu cing the data in th eir present form and dis tr ibuting them.T he original data products were produ ced u nder the NOAA /NAS A Pathfinder program ,by a proces sing team head ed by M s .M ary James of th e Goddard Glob al Change Data Center;and the s cience algorithms w ere establis hed by the AVHRR L and Sci-ence Work ing Grou p,chair ed by Dr.Joh n T ow nsh end of the University of M aryland.Goddard's contrib ution s to these activities w ere sponsored by NAS A's M iss ion to Plan et E arth program

摘要:降水和气温是影响地表植被覆盖状况的两个重要的气象要素,地表植被的生长对它们的响应又存在一定的滞后效应。利用我国334个气象台站和1982～1994年N O AA -AV HRR 卫星数据,通过相关分析研究了我国4～7月份各气候区域降水和活动积温对地表植被的影响。结果显示,不同的气候区域和月份,降水和积温对地表植被的作用程度明显不同;前期降水和活动积温对植被作用的有效时间尺度也分布不均,并与土壤质地类型分布有关,因此,通过某一固定时间尺度的降水或活动积温不能准确的预测大区域地表植被的生长状况。

关键词:归一化的植被指数;降水;活动积温;土壤质地

Correlation analysis between meteorological factors and the ratio of vegetation cover

XU Xing -Kui ,LIN Zhao -Hui ,XUE -Feng ,ZENG Qing -Cun

(ICCE S ,Institute of A tmosp heric

P hysics ,CA S ,B eij ing 100029,China ).Acta Ecologica Sinica ,2003,23(2):221～230.Abstract :R ainfall and temperatur e ar e two impor tant fa ct or s that influence v eget atio n cov erag e o ver the land surface.T he up-gr ow th of veg etation lag s behind r ainfall and temperat ur e in g ener al.Due t o their in-homo geneous distr ibutio n ,t he effect of rainfall and temper ature on land surfa ce veg etation co ver differ s distinctly.Some resear ch result s sho w that t he time lag is 14day s,and sugg ested that the ND VI (N o r-malized Differ ence V eg etation Index )could be used as an index fo r t he reco nstr uct ion o f r ainfall in so me reg io ns.

T her e are different climatic r egions in China such as t emper ate zone,subt ro pica l zone and tr opical zone .T he inter actio ns between meteo ro lo gical factor s and v eget atio n in each climatic r egion are sig nifi-ca nt ly different.M any facto rs such as t he inho mog eneous dist ribution of rainfall and temper ature,differ-ence of v egeta tio n types and soil text ur es pla y impo r tant r oles in interactions .T o dev elo p advanced land