Variation of Autumn Precipitation in Northwest China in 1971-2010

doi:10.7522/j.issn.1000-694X.2013.00186

JOURNAL OF DESERT RESEARCH

2014, Vol. 34

Issue (3): 805-813 DOI: 10.7522/j.issn.1000-694X.2013.00186

Variation of Autumn Precipitation in Northwest China in 1971-2010

Liu Kang¹, Li Zhaorong², Zhang Yu³

1. Gansu Provincial Meteorological Service Center, Lanzhou 730020, China;
2. Longnan Meteorological Bureau, Longnan 746000, Gansu, China;
3. Institute of Arid Meteorology, China Meteorological Administration, Lanzhou 730020, China

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Abstract Based on two indices of precipitation and precipitation days, the spatial and temporal variation characteristics of autumn precipitation in Northwest China were analyzed using the NCEP/NCAR reanalysis data and meteorological station observation data from 1971 to 2010 by routine statistical analysis, trend analysis, M-K test, singular value decomposition. Impacts of 500 hPa atmospheric circulation anomalies patterns on autumn precipitation were analyzed too. Results indicated that both autumn precipitation and autumn precipitation days in 1971-2010 increased, but autumn precipitation days increase was relatively more significant in past 40 years. Both autumn precipitation and autumn precipitation days in Northwest China were influenced by significant increase of autumn precipitation and autumn precipitation days in most meteorological stations in Qinghai Province and Gansu Province. Variation of autumn precipitation and autumn precipitation days in Northwest China was more significant in South-eastern Qinghai Province and Southern Shaanxi Province. The autumn precipitation was great in Southeastern Gansu Province, the Ningxia Hui Autonomous Region and Shaanxi Province when the east-high and west-low atmospheric circulation anomaly at 500 hPa was strong, and the autumn precipitation was great in most parts of Northwest China when the south-high and north-low atmospheric circulation anomaly at 500 hPa was strong.

Key words: Northwest China autumn precipitation anomaly of atmospheric circulation

Received: 08 May 2013 Published: 20 May 2014

ZTFLH:

P426.6



	Articles by authors
	Liu Kang
	Li Zhaorong
	Zhang Yu

Cite this article:

Liu Kang, Li Zhaorong, Zhang Yu. Variation of Autumn Precipitation in Northwest China in 1971-2010. JOURNAL OF DESERT RESEARCH, 2014, 34(3): 805-813.

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http://www.desert.ac.cn/EN/10.7522/j.issn.1000-694X.2013.00186 OR http://www.desert.ac.cn/EN/Y2014/V34/I3/805

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