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	Spatio-temporal variation of photosynthetically active radiation in china in recent 50 years
	Zhu Xudong1,2; He Honglin1; Liu Min1,2; Yu Guirui1; Sun Xiaomin1; Gao Yanhua1
刊名	Journal of geographical sciences
	2010-12-01
卷号	20期号:6页码:803-817
关键词	Photosynthetically active radiation (par) Mann-kendall trend analysis China
ISSN号	1009-637X
DOI	10.1007/s11442-010-0812-7
通讯作者	He honglin(hhonglin@cem.ac.cn)
英文摘要	Based 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.
WOS关键词	GLOBAL SOLAR-RADIATION ; CLIMATE ; PAR ; CO2
WOS研究方向	Physical Geography
WOS类目	Geography, Physical
语种	英语
出版者	SCIENCE CHINA PRESS
WOS记录号	WOS:000282912300001
内容类型	期刊论文
URI标识	http://www.corc.org.cn/handle/1471x/2407471
专题	中国科学院大学
通讯作者	He Honglin
作者单位	1.CAS, Inst Geog Sci & Nat Resources Res, Key Lab Ecosyst Network Observat & Modeling, Beijing 100101, Peoples R China 2.Chinese Acad Sci, Grad Univ, Beijing 100049, Peoples R China
推荐引用方式 GB/T 7714	Zhu Xudong,He Honglin,Liu Min,et al. Spatio-temporal variation of photosynthetically active radiation in china in recent 50 years[J]. Journal of geographical sciences,2010,20(6):803-817.
APA	Zhu Xudong,He Honglin,Liu Min,Yu Guirui,Sun Xiaomin,&Gao Yanhua.(2010).Spatio-temporal variation of photosynthetically active radiation in china in recent 50 years.Journal of geographical sciences,20(6),803-817.
MLA	Zhu Xudong,et al."Spatio-temporal variation of photosynthetically active radiation in china in recent 50 years".Journal of geographical sciences 20.6(2010):803-817.

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