青藏高原中东部植被覆盖对水热条件的响应研究
Study on The Response of Vegetation Cover to Precipitation and Temperature in Central/East Tibetan Plateau
查看参考文献19篇
|
文摘
|
植被覆盖的变化常是自然因子和人类活动的综合作用．分析植被对水热条件的响应关系有助于认识人类活动在地表植被变化中的作用程度。本文旨在结合1982～2000年地面气象观测资料和NOAA卫星的AVHRR植被指数（8km）．对气象站点分布相对密集的青藏高原中东部的NDVI（归一化植被指数）空间变化同水热条件的响应关系进行分析。通过水热有关指标的趋势面模拟、植被类型比较和样带分析，表明：在青藏高原中东部地区，水热条件组合较好（如常绿针叶林）或较差（如荒漠半荒漠）的区域，多年平均的NDVI旬值同水热条件的相关性不强；而范围广阔的水热条件组合中等区域（如高山草甸，草原）同水热条件相关性很高；青藏高原周边区域植被对水热条件相对不敏感，而高原主体部分植被覆盖同水热的相关性则很高（0．75以上）；此外。海拔对热量条件影响很大．进而影响植被覆盖． |
|
其他语种文摘
|
The Tibetan Plateau is among the few extensive regions remoted from human disturbance, and provides an ideal site to study the response of vegetation cover to water/thermal conditions （WTC）, esp. the response of natural vegetation. Therefore, this paper focuses on the spatial variation and then relations of water/thermal climate elements and NDVI （Normalized Difference Vegetation Index, AVHRR NDVI product of 8km） from year 1982 to 2000, mainly in central and east Tibetan Plateau where the gauge is basically dense enough to qualify related analyses. In the study, to investigate the relationships between spatial variation of water/thermal conditions and multi-year mean NDVI, trend surfaces of N （short for NDVI）, P （short for precipitation）, N-P relation and N-T relation are simulated, transects of four directions are designed and vegetation types are compared by group. The relation differences of N-P and N-T are respectively investigated, both spatially and biologically.
According to our study, following conclusions are reached： a） Climate elements： Ten-day mean NDVI of certain region in Tibetan Plateau is influenced less by the water and thermal climate elements if the vegetation cover is evergreen dense or totally sparse. On the other hand, temperate WTC （thus vegetation cover of temperate density） tends to have stronger relationship with NDVI than extreme conditions, b） Spatial variation： As indicated by transect analysis and trend surface simulation, the relation values of peripheral Plateau are low （often because of extreme WTC and thus extreme vegetation cover） while the values of main plateau body are over 0.75 （because of temperate WTC and thus temperate vegetation cover）, c） Zonality： Since altitude plays an important role in the distribution of thermal condition in Tibetan Plateau, annual NDVI bears a abvious vertical zonality while the horizontal zonalities are not so distinct. In addition, the relations of NDVI with precipitation and temperature have no clear zonal characteristics. |
|
来源
|
地理科学进展
,2005,24(5):13-22,封1 【核心库】
|
|
关键词
|
土地覆盖
;
响应
;
水热条件
;
青藏高原
|
|
地址
|
中国科学院地理科学与资源研究所, 北京, 100101
|
|
语种
|
中文 |
|
ISSN
|
1007-6301 |
|
学科
|
地球物理学 |
|
基金
|
国家自然科学基金项目
;
国家973计划
|
|
文献收藏号
|
CSCD:2163348
|
参考文献 共
19
共1页
|
|
1.
张镱锂. 青藏高原统计数据分析--以人口为例.
地理科学进展,2005,24(1):11-21
|
CSCD被引
9
次
|
|
|
|
|
2.
Ehrlich D. Applications of NOAA-AVHRR 1 km data for environmental monitoring.
IJRS,1994,15:145-161
|
CSCD被引
22
次
|
|
|
|
|
3.
Eklundh L. Estimating relation between AVHRR NDVI and rainfall in East Africa at 10-day and monthly time scales.
IJRS,1998,19(3):563-568
|
CSCD被引
23
次
|
|
|
|
|
4.
牛亚菲. 青藏高原生态环境问题研究.
地理科学进展,1999,18(2):163-171
|
CSCD被引
70
次
|
|
|
|
|
5.
莫申国. 青藏高原的主要环境效应.
地理科学进展,2004,23(2):88-96
|
CSCD被引
62
次
|
|
|
|
|
6.
潘保田. 青藏高原;全球气候变化的驱动机与放大器.I.新生代气候变化的基本特征.
兰州大学学报(自然科学版),1995,31(3):120-128
|
CSCD被引
31
次
|
|
|
|
|
7.
吴国雄. 青藏高原影响亚洲夏季气候研究的最新进展.
气象学报,2004,62(5):528-540
|
CSCD被引
88
次
|
|
|
|
|
8.
赵昕奕. 青藏高原气候变化对气候带的影响.
地理科学,2002,22(2):190-195
|
CSCD被引
43
次
|
|
|
|
|
9.
Potter C S. Global analysis of empirical relations between annual climate and seasonality of NDVI.
IJRS,1998,19(15):2921-2948
|
CSCD被引
30
次
|
|
|
|
|
10.
Richard Y. A statistical study of NDVI sensitivity to seasonal and intern annual rainfall variations in Southern Africa.
IJRS,1998,19(15):2907-2920
|
CSCD被引
40
次
|
|
|
|
|
11.
王正兴. 植被指数研究进展:从AVHRR-NDVI到MODIS-EVI.
生态学报,2003,23(5):979-987
|
CSCD被引
331
次
|
|
|
|
|
12.
James M E. An improved coarse resolution data set for terrestrial monitoring.
IJRS,1994,15:3347-3363
|
CSCD被引
39
次
|
|
|
|
|
13.
刘纪远. 中国土地利用变化现代过程时空特征的研究──基于卫星遥感数据.
第四纪研究,2000,20(3):229-240
|
CSCD被引
257
次
|
|
|
|
|
14.
Townshend J R G. Present capabilities and future possibilities.
RS Env,1991,35:234-255
|
CSCD被引
7
次
|
|
|
|
|
15.
Townshend J R G. an introduction.
IJRS,1994,15:3319-3332
|
CSCD被引
26
次
|
|
|
|
|
16.
Eastman J R. Long Time series evaluation using standardized principal components.
PERS,1993,59:991-996
|
CSCD被引
1
次
|
|
|
|
|
17.
国家气象信息中心. 国家气象信息中心.
http:∥cdc.cma.gov.cn,2005
|
CSCD被引
1
次
|
|
|
|
|
18.
NASA. ∥disc.
http:∥disc.gsfc.nasa.gov,2005
|
CSCD被引
1
次
|
|
|
|
|
19.
刘纪远. 中国近期土地利用变化的空间格局分析.
中国科学.D辑,2002,32(12):1021-1039
|
CSCD被引
3
次
|
|
|
|
|
了解气象卫星更多信息，请访问