The Position Variations of the North Boundary of East Asian Subtropical Summer Monsoon in 1951-2009

doi:10.7522/j.issn.1000-694X.2013.00217

JOURNAL OF DESERT RESEARCH

2013, Vol. 33

Issue (5): 1511-1519 DOI: 10.7522/j.issn.1000-694X.2013.00217

Weather and Climate

The Position Variations of the North Boundary of East Asian Subtropical Summer Monsoon in 1951-2009

LI Dong-liang1, SHAO Peng-cheng1,2, WANG Hui1

1.College of Atmospheric Sciences/ key Laboratory of Meteorological Disaster of Ministry of Education, Nanjing University of Information Science & Technology, Nanjing 210044, China;
2.National Climate Centre, China Meteorological Administration, Beijing 100081,China

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Abstract

Based on the daily precipitation data from 662 meteorological stations in China and NCEP/NCAR daily reanalysis data during 1951-2009, the inter-annual, inter-decadal variations of the north boundary of the East Asian subtropical summer monsoon and the time in which the East Asian subtropical summer monsoon arrive at or leave off the boundary were analyzed. The results show that the north boundary belt of East Asian aubtropical summer monsoon is roughly in northeast-southwest direction, the southern edge of the north boundary belt is located roughly 36°N at 110°E, the northern edge of the north boundary belt is located approximately 41°N. There is a good negative correlation between the boundary belt width and the southern edge of the boundary belt, the boundary belt width has a increase trend year by year. The north boundary has significant 2 a, 3 a, 9 a periodic oscillations. The summer monsoon begins to affect the north boundary belt on July 28, and on September 21 to leave. It is at 110°E that the north boundary belt has the maximum south wind component. Compared with years in which the north boundary is relatively south, the date of the East Asian subtropical summer monsoon arriving at the boundary is earlier and leaving later in years in which the north boundary is relatively north.

Key words: the north boundary of the East Asian subtropical summer monsoon soaking rainfall position variation affecting period

Received: 29 June 2012 Published: 22 October 2012

ZTFLH:

P462.41



	Articles by authors
	LI Dong-liang1
	SHAO Peng-cheng1
	2
	WANG Hui1

Cite this article:

LI Dong-liang1, SHAO Peng-cheng1,2, WANG Hui1. The Position Variations of the North Boundary of East Asian Subtropical Summer Monsoon in 1951-2009. JOURNAL OF DESERT RESEARCH, 2013, 33(5): 1511-1519.

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http://www.desert.ac.cn/EN/10.7522/j.issn.1000-694X.2013.00217 OR http://www.desert.ac.cn/EN/Y2013/V33/I5/1511

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