THE STATISTICAL CHARACTERISTICS OF IMPACT OF THE WESTWARD-GOING TROPICAL CYCLONES ON RAINFALL IN YUNNAN PLATEAU

GUO Rong-fen; XIAO Zi-niu; LI Ying; SHI Wen-jing

Abstract:

Using data available from the Retrieval System Based on Yearbooks of Tropical Cyclones over the Western North Pacific, NCEP/NCAR reanalysis daily data and observed precipitation data for 1959 to 2007 in Yunnan, a province located in a low-latitude plateau, this work analyzes the climatic characteristics and the corresponding large-scale circulation patterns related to the western North Pacific westward moving TCs (WMTCs). Its impacts on the rainfall in the Yunnan Plateau are studied. Results show that WMTCs happen almost every year, mainly from July to September. It shows a downward trend in decadal variation. Nearly the entire Yunnan area is affected by them but the eastern part experiences the most severe influences. Most of the WMTCs migrate from the South China Sea, primarily make landfall in Hainan and Guangdong and enter the Northern Bay. The tracks of these typhoons can be classified into five categories, in which the most significant impact results from those making landfall in Guangdong. All categories of the tropical cyclones can induce province-wide heavy rainfall in Yunnan. Super typhoons bring about the heaviest and most extensive rainfall over the low-latitude plateau while the associated circulation pattern is marked with a dominant 500 hPa meridional circulation at middle latitudes, an active monsoon depression and Intertropical Convection Zone (ITCZ) at low latitudes and a westward-located South Asia High at 100 hPa, which is favorable for tropical cyclones to travel westward. WMTCs tend to go westward into the interior part of China if the subtropical high extends its westernmost ridge point to the northeast of Yunnan, or expands its periphery anti-cyclonic circulation to the Tibetan Plateau, or merges with the Qinghai-Tibetan high.

Get Citation+

GUO Rong-fen, XIAO Zi-niu, LI Ying, et al. THE STATISTICAL CHARACTERISTICS OF IMPACT OF THE WESTWARD-GOING TROPICAL CYCLONES ON RAINFALL IN YUNNAN PLATEAU [J]. Journal of Tropical Meteorology, 2012, 18(1): 81-88.

Export:

Article Metrics

THE STATISTICAL CHARACTERISTICS OF IMPACT OF THE WESTWARD-GOING TROPICAL CYCLONES ON RAINFALL IN YUNNAN PLATEAU

Yunnan Meteorological Observatory, Kunming 650034 China

China Meteorological Administration Training Centre, Beijing 100081 China

Chinese Academy of Meteorological Sciences, Beijing 100081 China

Nanjing Institute of Information Engineering, Nanjing 210044 China

Received Date: 2010-12-25

Rev Recd Date: 2011-12-02

Abstract: Using data available from the Retrieval System Based on Yearbooks of Tropical Cyclones over the Western North Pacific, NCEP/NCAR reanalysis daily data and observed precipitation data for 1959 to 2007 in Yunnan, a province located in a low-latitude plateau, this work analyzes the climatic characteristics and the corresponding large-scale circulation patterns related to the western North Pacific westward moving TCs (WMTCs). Its impacts on the rainfall in the Yunnan Plateau are studied. Results show that WMTCs happen almost every year, mainly from July to September. It shows a downward trend in decadal variation. Nearly the entire Yunnan area is affected by them but the eastern part experiences the most severe influences. Most of the WMTCs migrate from the South China Sea, primarily make landfall in Hainan and Guangdong and enter the Northern Bay. The tracks of these typhoons can be classified into five categories, in which the most significant impact results from those making landfall in Guangdong. All categories of the tropical cyclones can induce province-wide heavy rainfall in Yunnan. Super typhoons bring about the heaviest and most extensive rainfall over the low-latitude plateau while the associated circulation pattern is marked with a dominant 500 hPa meridional circulation at middle latitudes, an active monsoon depression and Intertropical Convection Zone (ITCZ) at low latitudes and a westward-located South Asia High at 100 hPa, which is favorable for tropical cyclones to travel westward. WMTCs tend to go westward into the interior part of China if the subtropical high extends its westernmost ridge point to the northeast of Yunnan, or expands its periphery anti-cyclonic circulation to the Tibetan Plateau, or merges with the Qinghai-Tibetan high.

HTML

Reference (20)

[1]	WANG Ji-zhi. Activities of Typhoons in Western North Pacific over the Past 100 Years [M]. Beijing: Ocean Press,1991.
[2]	CHAN J C, SHI J E. Long-term trends and international and annual variability in tropical cyclone activity over the western north Pacific [J]. Geophy. Res. Lett., 1996, 23(1):2765-2767.
[3]	CHEN Min, ZHENG Yong-guang, TAO Zu-yu. An analysison tropical cyclones climatic feature in the western north Pacific for 1949-1996 [J]. J. Trop. Meteor., 1999, 15(1): 10-16.
[4]	MU Hai-zhen, TU Qi-pu. Climatological characteristics oftropical cyclone activities in the west Pacific [J]. J. Nanjing Inst. Meteor., 2000, 23(1): 81-86.
[5]	DONG Mei-ying, XUE Gen-yuan, ZHENG Pei-qun. Studyon the characteristics of tropical cyclones activity over thewestern North Pacific in 2004 and the cause of formation [J]. J.Trop. Meteor., 2006, 22(5): 498-504.
[6]	ZHU Qian-geng, CHEN Min. Statistical characteristics oflandfalling tropical cyclones in western North Pacific[C]//Proceedings of abstracts for the 12th National Seminar onTropical Cyclone Science. Beijing: Chinese Academy ofMeteorological Sciences, 2002: 15-17.
[7]	YU Yu-bin, YAO Xiu-ping. A statistical analysis onintensity change of tropical cyclone over the western NorthPacific [J]. J. Trop. Meteor., 2006, 22(6): 521-526.
[8]	YU Hui. Climatological Analysis of Intensity Change in Post-Landfall Tropical Cyclones: Tropical Cyclones Disappearing after Landfall [C]// Proceedings of abstracts forthe 12th National Seminar on Tropical Cyclone Science.Beijing: Chinese Academy of Meteorological Sciences. Beijing:Chinese Academy of Meteorological Sciences, 2002: 33-35.
[9]	SHAO Li-min, YANG Ji-li, YI Hai-qi, et al. Climaticanalysis for TC in the Northwest Pacific from 1949 to 2006 [J].Ocean Technol., 2007, 26(4): 83-105.
[10]	LEI Xiao-tu, CHEN Lian-shou. The latitudinal distributionof climatic characteristics on tropical cyclone activities in the WNP [J]. Quart. J. Appl. Meteor., 2002, 13(2): 218-227.
[11]	LIANG Jian-yin. Study of diurnal variations of tropicalcyclone landfall time in China [J]. J. Trop. Meteor., 2003,19(suppl.): 160-165.
[12]	LI Ying; CHEN Lian-shou; ZHANG Sheng-jun. Statisticalcharacteristics of tropical cyclone making landfalls on China[J]. J. Trop. Meteor., 2004, 20(1): 14-23.
[13]	ZHUO Ga, XIE Jin-nan, MA Jing-xian. Statistical relations between typhoon activity and precipitation in China[J]. Plateau Meteor., 2000, 19(2): 260-264.
[14]	LIU Chun-xia. The wavelet analysis of annual variation oftropical cyclone in Guangdong [J]. J. Trop. Meteor., 2001,17(4): 381-390.
[15]	CHEN Guang-hua, HUANG Rong-hui. The effect ofwarm pool thermal states on tropical cyclone in west northwestPacific [J]. J. Trop. Meteor., 2006, 22(6): 527-532.
[16]	HUANG Yong, LI Chong-yin, WANG Ying. The Pacificmeridional mode of coupled ocean-atmosphere and theconnection with frequency of tropical cyclones activity overthe western north Pacific [J]. J. Trop. Meteor., 2009, 25(2):169-174.
[17]	HUANG Yong, LI Chong-Yin, WANG Ying. Further studyon the characteristics of frequency variation of tropicalcyclones activity over western north Pacific and therelationship with sea surface temperature [J]. J. Trop. Meteor.,2009, 25(3): 273-280.
[18]	QIN Jian, JU Jian-hua, XIE Ming-en. Weather and Climate in a Low-latitude Plateau [M]. Beijing: China Meteorological Press, 1997: 84-85; 51-52.
[19]	CHEN Lian-shou, DING Yi-hui. Introduction to Typhoonsin Western North Pacific [M]. Beijing: Science Press, 1979:325-328; 227-261.
[20]	ZENG Su-juan, GUO Xiu-ying. South Asian high and tracks of typhoons [J]. Meteor. Mon., 1986(5): 32-33.

THE STATISTICAL CHARACTERISTICS OF IMPACT OF THE WESTWARD-GOING TROPICAL CYCLONES ON RAINFALL IN YUNNAN PLATEAU

Abstract:

References

Get Citation+

Share Article

Article Metrics

Proportional views

Manuscript History

Online:

通讯作者: 陈斌, bchen63@163.com