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	Precipitation variability in Northeast China from 1961 to 2008
	Liang L. Q. ; Li L. J. ; Liu Q.
	2011
关键词	Precipitation Spatial distribution Trend Climate jump Periodicity Northeast China yellow-river basin reference evapotranspiration climate-change spatial-distribution wavelet analysis pan evaporation rainfall trends temporal trend resources regime
英文摘要	Variability in precipitation plays an important role in the way it influences ecological and agricultural water requirements. This is especially true for semi-humid and semi-arid regions exemplified in certain regions in Northeast China. The temporal variation and spatial distribution of precipitation in Northeast China from 1961 to 2008 was investigated in this study by means of a linear fitted model, the Mann-Kendall test, the moving t-test, and the Morlet wavelet and Kriging (exponential) interpolation methods. Results indicate that: (a) the monthly precipitation rate varied considerably wherein summer precipitation accounted for 65.7% of the annual total value; (b) a decreasing trend in precipitation was found in the data obtained from 77 (annual) and 80 (summer) of the 98 meteorological stations throughout a 48 year period (from 1961 to 2008) while climate jumps were detected in 77% (annual) and 67% (summer); (c) three climate jumps and periods of 2.3 and 3.3 years (significant at a 95% confidence level) were detected on a regional scale; (d) the mean annual and summer precipitation rates decreased in a southeastern to northwestern trajectory throughout the 48 year period due both to the influence of the East Asian monsoon and to topography. All these findings can help provide rational regulatory and managerial policy in relation to water resources to maintain the health of the various ecosystems that make up Northeast China. (C) 2011 Elsevier B.V. All rights reserved.
出处	Journal of Hydrology
卷	404
期	1-2
页	67-76
收录类别	SCI
语种	英语
ISSN号	0022-1694
内容类型	SCI/SSCI论文
源URL	[http://ir.igsnrr.ac.cn/handle/311030/23552]
专题	地理科学与资源研究所_历年回溯文献
推荐引用方式 GB/T 7714	Liang L. Q.,Li L. J.,Liu Q.. Precipitation variability in Northeast China from 1961 to 2008. 2011.

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