Abnormal Spatial Distribution of Spring Precipitation and Its Decadal Variability in the Hexi Corridor in the Arid Area of Northwest China

doi:10.7522/j.issn.1000-694X.2013.00357

JOURNAL OF DESERT RESEARCH

2014, Vol. 34

Issue (5): 1386-1392 DOI: 10.7522/j.issn.1000-694X.2013.00357

Abnormal Spatial Distribution of Spring Precipitation and Its Decadal Variability in the Hexi Corridor in the Arid Area of Northwest China

Liu Honglan^1,2, Zhang Qiang¹, Wang Sheng³, Guo Junqin⁴, Yang Huan²

1. Key Laboratory of Arid Climatic Change and Reducing Disaster of Gansu Province/Key Laboratory of Arid Climate Change and Disaster Reduction of CMA, Institute of Arid Meteorology, China Meteorological Administration, Lanzhou 730020, China;
2. Zhangye Meteorological Bureau, Zhangye 734000, Gansu, China;
3. Subei County Meteorological Bureau, Subei 736300, Gansu, China;
4. Northwest Regional Climate Centre, Lanzhou 730020, China

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Abstract Using the precipitation data of 19 meteorological stations in the Hexi Corridor through 2012, we analyzed the climatic character of spring precipitation. EOF, REOF and power spectrum method were used to research the spatial and temporal characteristics of spring precipitation. Whether there was mutation in the spring precipitation sequence was tested by Mann-Kendall way. The results showed that the spatial distribution of spring precipitation in the Hexi Corridor was extremely uneven, the rainy area was located in the southeast, and the less rain area was located in the northwest. The spring precipitation was consistent in the entire region at the first space scale, and two natural precipitation zones at the second spatial scale, and five natural precipitation zones at the third spatial scale. The 2010s was a decade with the most precipitation for nearly half a century. The precipitation was the least during 1970s. The annual variability of the spring precipitation was significant in the Hexi Corridor. The year with the most precipitation was 6 times more than the least year. There was obvious mutation in 1985 for the spring precipitation in the Hexi Corridor from 1961 to 2012. Short period of 3 years and long period of 19 years were the main cycle.

Key words: spring precipitation spatiotemporal distribution 500 hPa Hexi Corridor

Received: 09 August 2013 Published: 20 September 2014

ZTFLH:

P426.6



	Articles by authors
	Liu Honglan
	Zhang Qiang
	Wang Sheng
	Guo Junqin
	Yang Huan

Cite this article:

Liu Honglan, Zhang Qiang, Wang Sheng, Guo Junqin, Yang Huan. Abnormal Spatial Distribution of Spring Precipitation and Its Decadal Variability in the Hexi Corridor in the Arid Area of Northwest China. JOURNAL OF DESERT RESEARCH, 2014, 34(5): 1386-1392.

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http://www.desert.ac.cn/EN/10.7522/j.issn.1000-694X.2013.00357 OR http://www.desert.ac.cn/EN/Y2014/V34/I5/1386

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