ISWC OpenIR  > 水保所知识产出(1956---)
基于 NDVI 的黄土高原地区植被覆盖度 对气候变化响应及定量分析
Thesis Advisor张晓萍
Degree Grantor中国科学院研究生院
Place of Conferral北京
Keyword黄土高原地区 气候变化 植被覆盖度 人类活动

本文主要采用1982-2006年的NOAA/AVHRR NDVI 8 km数据和黄土高原及周边
地区 82 个气象站点的降水、气温数据,探讨了黄土高原地区植被覆盖、主要气候因
1)1982-2006 年,黄土高原地区植被覆盖度呈不显著上升趋势,植被覆盖度波动
较低。四季平均植被覆盖度线性趋势均为正。未变化的植被覆盖度面积占 85.29%以
上,为中低植被覆盖水平,植被覆盖改善面积占 9.17%,退化面积占 5.54%。重心演
2)同时期黄土高原地区年降水量呈不显著下降趋势,平均减少速率为 1.9mm/a,
气温呈极显著(p<0.001)上升趋势,上升速率为 0.7℃/10a。四季平均温度均为增加
黄土高原地区植被覆盖度与降水量空间上呈正相关的面积达到 85.9%,有 22.3%的面
积达到显著正相关(p<0.05)。而与温度呈正相关的面积为 68.7%,17.6%的面积达到
显著正相关 (p<0.05)。植被生长对降水因子的响应更为敏感。
4)初步认为 1997-2006 年人类活动对植被生长的贡献率约为 20%,气候变化对
植被生长的贡献达 80%。

Other Abstract

This paper, by basing on NOAA/AVHRR NDVI 8 km data between 1982 and 2006,
along with rainfall and temperature data of 82 meteorological stations on Loess Plateau
and its surrounding places, has discussed the vegetation cover, changing characteristics on
time and space of major climatic factors and their mutual response regularity; moreover,
the influence and contribution degrees of human activities and climate changes on regional
vegetation cover are analyzed with residual analysis. Major conclusions of this paper
1) from 1982 to 2006, vegetation cover of Loess Plateau rose insignificantly and
vegetation cover did not go through any big change; the linear trend of average vegetation
cover in four seasons were positive; the area of unchanged vegetation cover was taking up
more than 85.29%, a level of low and medium vegetation cover; the area of improved
vegetation area was taking up 9.17%; the area of vegetation degradation was taking up
5.54%. According to a core evolution analysis, the core positions of low and medium
vegetation cover and high vegetation cover were mainly kept unchanged, the coverage
levels of medium and high vegetation, medium vegetation and low vegetation moved
towards directions of east, northwest and southeast respectively.
2) meanwhile, the annual rainfall of Loess Plateau declined insignificantly, in an
average rate of 1.9mm/a; the rainfalls in the four seasons declined insignificantly though
rainfall in summer season declined most obviously; the annual average temperature on
Loess Plateau rose significantly (p<0.001), at a rate of 0.7℃/10a; temperatures in the four
seasons were on the rise and temperatures in spring and summer rose significantly
(p<0.01); the climate was changing toward warmer and dryer.
3) the partially correlation between vegetation covers and annual rainfalls and annual  average temperatures were significant but spatial difference was obvious; the area in which
the vegetation covers on Loess Plateau were positively related to rainfall in space was
taking up 85.9%, of which 22.3% reached the level of significant correlation(p<0.05); the
area in which vegetation covers were positively related to temperatures was taking up
68.7%, of which 17.6% reached the level of significant positive correlation (p<0.05);
vegetation growth was very sensitive to the response of precipitation factors.
4) from 1997 to 2006, the contribution rate of human activities to vegetation growth
was about 20% while the that of climate changes was as high as 80%.
Key words: Loess Plateau area; climate change; vegetation cover; human activity

Document Type学位论文
Recommended Citation
GB/T 7714
郭敏杰. 基于 NDVI 的黄土高原地区植被覆盖度 对气候变化响应及定量分析[D]. 北京. 中国科学院研究生院,2014.
Files in This Item:
File Name/Size DocType Version Access License
基于 NDVI 的黄土高原地区植被覆盖(6582KB)学位论文 开放获取CC BY-NC-SAApplication Full Text
Related Services
Recommend this item
Usage statistics
Export to Endnote
Google Scholar
Similar articles in Google Scholar
[郭敏杰]'s Articles
Baidu academic
Similar articles in Baidu academic
[郭敏杰]'s Articles
Bing Scholar
Similar articles in Bing Scholar
[郭敏杰]'s Articles
Terms of Use
No data!
Social Bookmark/Share
All comments (0)
No comment.

Items in the repository are protected by copyright, with all rights reserved, unless otherwise indicated.