干旱区生态环境知识资源中心(Arid): 石羊河中游生长季植被覆盖对气候的响应

Arid

	石羊河中游生长季植被覆盖对气候的响应
其他题名	Response of Vegetation Coverage to Climatic Factors in the Middle Reaches of the Shiyang River in Growing Season
	张永 1; 杨自辉 2; 王立 1; 康颖 1
来源期刊	干旱区研究
ISSN	1001-4675
出版年	2018
卷号	35 期号:3 页码:662-668
中文摘要	利用MODIS-EVI月合成数据,计算20062015年石羊河中游生长季植被覆盖度,探究植被覆盖年际变化以及对气候的响应关系。利用像元二分模型计算植被覆盖度,提取研究区不同植被覆盖程度的年际变化。结果表明: 10 a间,中游地区以低植被覆盖类型为主,并与同期降水的年际变化关系密切。其次,采用变化趋势分析法,计算监测时段内植被覆盖的动态变化。结果表明:中游地区生长季植被覆盖度总体上处于增加趋势,增加速率为0.041·(10a)~(-1);植被覆盖度显著增加区域集中于绿洲-荒漠过渡带。最后,采用相关分析法,分析了植被覆盖度与生长季平均气温和降水的相关程度。生长季植被覆盖度与同期降水的相关程度高于与生长季平均气温相关性,平均偏相关系数分别为0.14和-0.05;荒漠绿洲过渡带成为与气候因子显著相关的活跃地带。
英文摘要	In this paper, the MODIS-EVI monthly data were used to calculate the values of vegetation coverage in the middle reaches of the Shiyang River in growing season during the period from 2006 to 2015. The interannual variation of vegetation coverage and its response to climate factors were investigated. The dimidiate pixel model (DPM) was used to calculate the values of vegetation coverage,and the interannual variation of vegetation coverage at different levels in the study area was extracted. The results showed that the low vegetation coverage was mainly distributed in the middle reaches in the 10 years,which was closely related to the interannual variation of precipitation in the same period. Secondly, the trend analysis was used to calculate the dynamic changes of vegetation coverage during the monitoring period. The results showed that the vegetation coverage in the middle reaches was increased, a nd its increase rate was 0.041·(10a)~(-1) . Significant increase of vegetation coverage occurred in the oasis-desert ecotone. Finally, the correlations between vegetation coverage and temperature and precipitation in growing season were analyzed by correlation analysis. The results showed that the correlation between vegetation coverage and precipitation in growing season was higher than that between vegetation coverage and temperature,and the average partial correlation coefficients were 0.14 and-0.05 respectively. The desert-oasis ecotone was significantly correlated with climatic factors.
中文关键词	生长季 ; 植被覆盖 ; 动态监测 ; 相关性 ; 气候因子 ; 石羊河中游
英文关键词	growing season vegetation coverage dynamic monitoring correlation climatic factor middle reaches of the Shiyang River
语种	中文
国家	中国
收录类别	CSCD
WOS类目	PLANT SCIENCES
WOS研究方向	Plant Sciences
CSCD记录号	CSCD:6245066
来源机构	甘肃农业大学
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/237657
作者单位	1.甘肃农业大学林学院, 兰州, 甘肃 730070, 中国; 2.甘肃民勤荒漠草地生态系统国家野外科学观测研究站, 甘肃民勤荒漠草地生态系统国家野外科学观测研究站, 民勤, 甘肃 733300, 中国
推荐引用方式 GB/T 7714	张永,杨自辉,王立,等. 石羊河中游生长季植被覆盖对气候的响应[J]. 甘肃农业大学,2018,35(3):662-668.
APA	张永,杨自辉,王立,&康颖.(2018).石羊河中游生长季植被覆盖对气候的响应.干旱区研究,35(3),662-668.
MLA	张永,et al."石羊河中游生长季植被覆盖对气候的响应".干旱区研究 35.3(2018):662-668.