ANALYSIS ON INTRA-ANNUAL INHOMOGENEITY OF RAINSTORM EVENTS IN GUANGXI

QIN Wei-jian; LI Dong-liang; LEI Xue-mei; QIN Zhi-nian

Abstract:

Based on the daily precipitation data of 83 stations in Guangxi and the NCEP/NCAR monthly reanalysis data from 1979 through 2008, the characteristics of spatial and temporal distribution and variation of the rainstorm concentration degree (RCD) and the rainstorm concentration period (RCP) are analyzed by using the methods of Monte Carlo test etc. The results are shown as follows. The rainstorm events are concentrated in April-September, taking up about 90% of the yearly rainfall total, and the percentages of rainstorms in the annual total precipitation have an increasing tendency. RCD in the east of Guangxi is larger than that in the west. The RCP in the northeast and southwest of Guangxi is later than that in the other regions, and has the earliest onset in the northern mountainous regions of Baise and southeast Guangxi. The RCD exhibits an increasing tendency in the northwest and the coastal region while showing a decreasing tendency in the other regions. On a long-term basis, the RCP in the east and coastal region has a postponing trend but tends to be earlier in the other regions. The proposed mechanism is as follows: If the geopotential height in the south of Qinghai-Tibet Plateau and the West Pacific has a highly negative anomaly in winter, the western Pacific subtropical high will be strong in summer, which increases the RCD in Guangxi. If the geopotential height has a highly positive anomaly in winter, the subtropical high will have a significant periodic oscillation in summer, which decreases the RCD in Guangxi. The value of RCD is high (low) in the area of northern mountainous regions of Guangxi and Beihai in strong (weak) South China Sea summer monsoon years, while in the other areas, the value of RCD is low (high).

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QIN Wei-jian, LI Dong-liang, LEI Xue-mei, et al. ANALYSIS ON INTRA-ANNUAL INHOMOGENEITY OF RAINSTORM EVENTS IN GUANGXI [J]. Journal of Tropical Meteorology, 2014, 20(2): 135-142.

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ANALYSIS ON INTRA-ANNUAL INHOMOGENEITY OF RAINSTORM EVENTS IN GUANGXI

Collaborative Innovation Center on Forecast and Evaluation of Meteorological Disasters, Nanjing University of Information Science & Technology, Nanjing 210044 China 2. Guangxi Climate Center, Nanning 530022 China

Rev Recd Date: 2014-01-16

Abstract: Based on the daily precipitation data of 83 stations in Guangxi and the NCEP/NCAR monthly reanalysis data from 1979 through 2008, the characteristics of spatial and temporal distribution and variation of the rainstorm concentration degree (RCD) and the rainstorm concentration period (RCP) are analyzed by using the methods of Monte Carlo test etc. The results are shown as follows. The rainstorm events are concentrated in April-September, taking up about 90% of the yearly rainfall total, and the percentages of rainstorms in the annual total precipitation have an increasing tendency. RCD in the east of Guangxi is larger than that in the west. The RCP in the northeast and southwest of Guangxi is later than that in the other regions, and has the earliest onset in the northern mountainous regions of Baise and southeast Guangxi. The RCD exhibits an increasing tendency in the northwest and the coastal region while showing a decreasing tendency in the other regions. On a long-term basis, the RCP in the east and coastal region has a postponing trend but tends to be earlier in the other regions. The proposed mechanism is as follows: If the geopotential height in the south of Qinghai-Tibet Plateau and the West Pacific has a highly negative anomaly in winter, the western Pacific subtropical high will be strong in summer, which increases the RCD in Guangxi. If the geopotential height has a highly positive anomaly in winter, the subtropical high will have a significant periodic oscillation in summer, which decreases the RCD in Guangxi. The value of RCD is high (low) in the area of northern mountainous regions of Guangxi and Beihai in strong (weak) South China Sea summer monsoon years, while in the other areas, the value of RCD is low (high).

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[1]	COORTHORS. National Assessment Report on Climate Change (China) [M]. Beijing: Science Press, 2007:1-7.
[2]	ZHAO Ping, ZHOU Xiu-ji. Decadal variability of rainfall persistence time and rainbelt shift over eastern China in recent 40 years [J]. J. Appl. Meteor. Sci., 2006, 17(5): 548-556.
[3]	ZHANG Lu-jun, QIANG Yong-fu. A study on the feature of precipitation concentration and its relation to flood-producing in the Yangtze River valley of China [J]. Chin. J. Geophys., 2004, 47(4): 622-630 (in Chinese).
[4]	YANG Jin-hu, WANG Peng-xiang, BAI Hu-zhi. Intra-annual inhomogeneity characteristics of precipitation over northwest China [J]. Adv. Climate Change Res., 2007, 3(5): 275-281.
[5]	ZHANG Tian-yu, CHENG Bing-yan, WANG Ji-fang. Temporal and spatial change characteristics of precipitation-concentration degree (PCD) and precipitation-concentration period (PCP) over north China in rainy reason [J]. Plateau Meteor., 2007, 26(4): 843-853.
[6]	YANG Jin-hu, LI Yao-hui, WANG Peng-xiang, et al. Analyses on intra-annual inhomogeneity characteristics of extreme strong precipitation events in China [J]. J. Nat. Res., 2007, 22(4): 623-633.
[7]	JIANG Ai-jun, DU Yin, XIE Zhi-qing, et al. Climatic trends of heavy precipitation spatial and temporal concentration in China [J]. Acta Geogr., Sinica, 2005, 60(6): 1007-1014.
[8]	HUANG Xiang-xing, LIN Kai-ping, ZHAO Jiang-jie. The synoptic model of widespread extensive flash-flood-producing rainstorm processes in Guangxi [J]. J. Guangxi Meteor., 2001, 22(1): 21-23.
[9]	NONG Meng-song, HUANG Hai-hong, CHEN Wei-bin. Analysis of upper and low-level jet impact on heavy rainfall in Guangxi [J]. J. Anhui Agric. Sci., 2010, 38(23):12754-12756.
[10]	LUO Jian-ying, LIAO Sheng-shi, HUANG Gui-lan. Water vapor analysis of heavy rain events in Guangxi in July 2004 [J]. Meteor. Mon., 2009, 35(8): 61-69.
[11]	LIAO Xue-ping, QIN Wei-jian, TANG Bing-li, et al. Wavelet analysis of variation of rainstorm days in Guangxi in recent 50 years [J]. Meteor. Mon., 2007, 33(12): 39-45.
[12]	HUANG Ming-ce. Rainstorm space and time distributed characteristic in Guangxi [J]. J. Guangxi Meteor., 2006, 27(3): 9-13.
[13]	LI Qing, LU Wei-ping, YAO Cai. Study on the characteristics of excessive rainstorm in Guangxi [J]. J. Guangxi Meteor., 2002, 23(4): 9-12.
[14]	OU Yi. Frequency characteristics of rainstorms in flood season of Guangxi and correlation to the onset time of south China sea summer monsoon [J]. J. Trop. Geogra., 2009, 29(1): 16-19.
[15]	QIN Wei-jian, WANG Yong-qing, QIN Zhi-nian. Study on the variation characteristics of precipitation concentration degree in Guangxi under the background of global climate becoming warm [J]. Meteor., Environ. Res., 2010, 1(5): 17-21.
[16]	QIN Wei-jian, RONG Jun, HE Hui. A study on the climate change characteristic of cloud cover in the recent 45 years of Guangxi [J]. Trop. Geogr., 2009, 29(6): 520-525.
[17]	LIVEZE Y R, CHEN W Y. Statistical field significance and its determination by Mante Carlo technique [J]. Mon. Wea. Rev., 1983, 111(1): 46-59.
[18]	SHI Neng, WEI Feng-ying, FENG Guo-lin, et al. Monte Carlo test used in correlation and composite analysis of meteorological fields [J]. J. Nanjing Inst. Meteor., 1997, 20(3): 355-359.
[19]	SHI Neng, GU Jun-qiang, HUANG Xian-xiang, et al. Significance test and Monte Carlo test used in composite analysis of window field and applications [J]. Chin. J. Atmos. Sci., 2004, 28(6): 950-956.
[20]	LI Chong-yin, ZHANG Li-ping. Summer monsoon activities in the South China Sea and its impacts [J]. Chin. J. Atmos. Sci., 1999, 23(3): 257-266.
[21]	GAO Hui, LIANG Jian-yin. Definition of south China sea summer monsoon’s onset date and east Asian summer monsoon’s index [J]. J. Trop. Meteor., 2005, 21(5): 525-531.
[22]	WU Shang-sen, LIANG Jian-yin, LI Chun-hui. Relationship between the intensity of South China Sea summer monsoon and the precipitation in raining seasons in China [J]. J. Trop. Meteor., 2003, 19(suppl.): 25-36.
[23]	LIU Yan-ju, DING Yi-hui, SONG Yan-ling. The moisture Transport and moisture budget over the South China Sea before and after the summer monsoon onset in 1998 [J]. J. Trop. Meteor., 2005, 21(1): 55-62.
[24]	ZHENG Bin, LIN Ai-lan, YUAN Jin-nan, et al. Study on the cause of June 2005 torrential rain in Guangdong [J]. J. Trop. Meteor., 2007, 23(2): 135-140.
[25]	JIANG Xiao-ping, LIU Chun-xia, FEI Zhi-bin, et al. The influence of South China Sea summer monsoon on the rainstorm associated with the landfalling strong tropical storm Bilis (0604) [J]. J. Trop. Meteor., 2008, 24(4): 379-384.
[26]	HUANG Chen-jie, LAN Guang-dong, CHOI Man-cheng, et al. A diagnostic analysis of the weakening of west pacific subtropical anticyclone during the period of south China sea summer monsoon onset in 1998 [J]. J. Trop. Meteor., 2010, 26(3): 349-356.

ANALYSIS ON INTRA-ANNUAL INHOMOGENEITY OF RAINSTORM EVENTS IN GUANGXI

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