spatiotemporalvariationofphotosyntheticallyactiveradiationinchinainrecent50years
Zhu Xudong1; He Honglin2; Liu Min1; Yu Guirui2; Sun Xiaomin2; Gao Yanhua2
2010
Source Publicationjournalofgeographicalsciences
ISSN1009-637X
Volume20Issue:6Pages:803
AbstractBased on long-term measurement data of weather/ecological stations over china, this paper calculated and produced annually- and seasonally-averaged photosynthetically active radiation (par) spatial data from 1961 to 2007, using climatological calculations and spatialization techniques. the spatio-temporal variation characteristics of annually- and seasonally-averaged par spatial data over china in recent 50 years were analyzed with mann-kendall trend analysis method and gis spatial analysis techniques. the results show that: (1) as a whole, the spatial distribution of par is complex and inhomogeneous across china, with lower par in the eastern and southern parts of china and higher par in the western part. mean annual par over china ranges from 17.7 mol m(-2) d(-1) to 39.5 mol m(-2) d(-1). (2) annually- and seasonally-averaged par of each pixel over china are averaged as a whole and the mean values decline visibly with fluctuant processes, and the changing rate of annually-averaged par is -0.138 mol m(-2) d(-1)/10a. the changing amplitudes among four seasons are different, with maximum dropping in summer, and the descending speed of par is faster before the 1990s, after which the speed slows down. (3) the analysis by each pixel shows that par declines significantly (alpha=0.05) in most parts of china. summer and winter play more important roles in the interannual variability of par. north china is always a decreasing zone in four seasons, while the northwest of qinghai-tibet plateau turns to be an increasing zone in four seasons. (4) the spatial distributions of the interannual variability of par vary among different periods. the interannual variabilities of par in a certain region are different not only among four seasons, but also among different periods.
Language英语
Document Type期刊论文
Identifierhttp://ir.igsnrr.ac.cn/handle/311030/102915
Collection生态系统网络观测与模拟院重点实验室_生态系统综合研究中心
Affiliation1.中国科学院大学
2.中国科学院地理科学与资源研究所
Recommended Citation
GB/T 7714
Zhu Xudong,He Honglin,Liu Min,et al. spatiotemporalvariationofphotosyntheticallyactiveradiationinchinainrecent50years[J]. journalofgeographicalsciences,2010,20(6):803.
APA Zhu Xudong,He Honglin,Liu Min,Yu Guirui,Sun Xiaomin,&Gao Yanhua.(2010).spatiotemporalvariationofphotosyntheticallyactiveradiationinchinainrecent50years.journalofgeographicalsciences,20(6),803.
MLA Zhu Xudong,et al."spatiotemporalvariationofphotosyntheticallyactiveradiationinchinainrecent50years".journalofgeographicalsciences 20.6(2010):803.
Files in This Item:
There are no files associated with this item.
Related Services
Recommend this item
Bookmark
Usage statistics
Export to Endnote
Google Scholar
Similar articles in Google Scholar
[Zhu Xudong]'s Articles
[He Honglin]'s Articles
[Liu Min]'s Articles
Baidu academic
Similar articles in Baidu academic
[Zhu Xudong]'s Articles
[He Honglin]'s Articles
[Liu Min]'s Articles
Bing Scholar
Similar articles in Bing Scholar
[Zhu Xudong]'s Articles
[He Honglin]'s Articles
[Liu Min]'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.