CHARACTERIZATION AND CAUSAL ANALYSIS OF TEMPORAL AND SPATIAL VARIATION IN DRY-WET CONDITIONS IN AUTUMN IN SOUTHWEST CHINA

LI Dong-liang; XU Dong-fu; WANG Hui; QU Qiao-na; ZHAO Xiao-meng

Abstract:

Based on the daily precipitation and temperature data of 97 stations in Southwest China (SW China) from 1960 to 2009, a dry-wet index is calculated. The spatiotemporal variation characteristics of dry-wet conditions, precipitation and temperature are studied. Then the abnormal atmospheric circulation characteristics are discussed using reanalysis data. The results show that SW China has exhibited an overall trend of autumnal drought since the late 1980s, and this drought trend became more significant early in the 2000s, especially in the eastern SW China. Autumnal dry-wet variation in southwestern China showed two major modes: consistent change across the entire region and opposing changes in the eastern and western regions. The spatial distribution of dry-wet anomalies was more significantly affected by precipitation, while temporal variation in dry-wet conditions was more strongly influenced by temperature. The former mode is affected by the anomalies of the precedent SST near the Western Pacific Warm Pool, the Western Pacific Subtropical High, the East Asian Trough and the South Trough. The latter mode is related to the wind anomalies in the eastern SW China and the vertical movement in the western and eastern SW China. These are the main influencing factors for the autumn dry-wet variation in SW China, which are of great significance to the prediction of drought.

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LI Dong-liang, XU Dong-fu, WANG Hui, et al. CHARACTERIZATION AND CAUSAL ANALYSIS OF TEMPORAL AND SPATIAL VARIATION IN DRY-WET CONDITIONS IN AUTUMN IN SOUTHWEST CHINA [J]. Journal of Tropical Meteorology, 2015, 21(1): 55-66.

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CHARACTERIZATION AND CAUSAL ANALYSIS OF TEMPORAL AND SPATIAL VARIATION IN DRY-WET CONDITIONS IN AUTUMN IN SOUTHWEST CHINA

Collaborative Innovation Center on Forecast and Evaluation of Meteorological Disasters/Key Laboratory of Meteorological Disaster of Ministry of Education/School of Atmospheric Science, NUIST, Nanjing 210044 China

Rev Recd Date: 2014-11-27

Abstract: Based on the daily precipitation and temperature data of 97 stations in Southwest China (SW China) from 1960 to 2009, a dry-wet index is calculated. The spatiotemporal variation characteristics of dry-wet conditions, precipitation and temperature are studied. Then the abnormal atmospheric circulation characteristics are discussed using reanalysis data. The results show that SW China has exhibited an overall trend of autumnal drought since the late 1980s, and this drought trend became more significant early in the 2000s, especially in the eastern SW China. Autumnal dry-wet variation in southwestern China showed two major modes: consistent change across the entire region and opposing changes in the eastern and western regions. The spatial distribution of dry-wet anomalies was more significantly affected by precipitation, while temporal variation in dry-wet conditions was more strongly influenced by temperature. The former mode is affected by the anomalies of the precedent SST near the Western Pacific Warm Pool, the Western Pacific Subtropical High, the East Asian Trough and the South Trough. The latter mode is related to the wind anomalies in the eastern SW China and the vertical movement in the western and eastern SW China. These are the main influencing factors for the autumn dry-wet variation in SW China, which are of great significance to the prediction of drought.

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[1]	WANG Zun-ya, DING Yi-hui, HE Jin-hai, et al. An updating analysis of the climate change in China in recent 50 years [J]. Acta Meteorol Sinica, 2004, 62(2): 228-236 (in Chinese).
[2]	WANG Da-jun, CHEN Lie, DING Yu-guo. The change trend in rainfall、wet days of China in recent 40 years and the correlation between the change trend an the change of globe temperature [J]. J Trop Meteorol, 2006, 22(3): 283-289 (in Chinese).
[3]	MA Zhu-guo, HUANG Gang, GAN Wen-qiang, et al. Multi-scale temporal characteristics of dryness/wetness over northern China during the last Century [J]. Chin J Atmos Sci, 2005, 29(5): 671-681 (in Chinese).
[4]	FU Jiao-lan, LIN Xiang, QIAN Wei-hong. The temporal and spatial characteristics of graded summer rain days over China [J]. J Trop Meteorol, 2008, 24(4): 367-373 (in Chinese).
[5]	YANG Xuan, LI Dong-liang. Precipitation variation characteristics and arid climate division in China [J]. Arid Meteorol, 2008, 26(2): 17-24 (in Chinese).
[6]	YUAN Yun, LI Dong-liang, AN Di. Winter aridity division in China based on standardized precipitation index and circulation characteristics [J]. J Desert Res, 2010, 30(4): 917-925 (in Chinese).
[7]	YANG Jian-ping, DING Yong-jian, CHEN Ren-sheng. The fluctuation of dry an wet climate boundary and its causal analyses in China [J]. Acta Meteorol Sinica, 2003, 61(3): 364-373 (in Chinese).
[8]	JI Zhong-ping, WU Xiao-fang, Cai Jie yun, et al. Vari-ation of precipitation during winter as a cause of sustained drought in Guangdong during the past 50 years [J]. J Trop Meteorol, 2010, 16(1): 86-90.
[9]	BAI Ai-juan, LIU Xiao-dong. Characteristics of rainfall variation over East China for the last 50 years and their relationship with droughts and floods [J]. J Trop Meteorol, 2010, 16(3): 255-262.
[10]	LI Wei-jing, ZHAO Zheng-guo, LI Xiang, et al. The drought characteristics analysis in North China and its causes of formation [J]. Arid Meteorol, 2003, 21(4): 1-5 (in Chinese).
[11]	MA Zhen-feng, PENG Jun, GAO Wen-liang, et al. Climate variation of Southwest China in recent 40 years [J]. Plateau Meteorol, 2006, 25(4): 633-642 (in Chinese).
[12]	LIU Xiao-ran, LI Guo-ping, FAN Guang-zhou, et al. Spatial and temporal characteristics of temperature changes in Southwest China during 1961�C2000 [J]. Sci Meteorol Sinica, 2008, 28(1): 30-36 (in Chinese).
[13]	WANG Lei, ZHANG Ren-he, ZHANG Hong-liang. Analyses of spatial-temporal characteristics for various seasonal sea surface temperature versus summer rainfall in China [J]. J Trop Meteorol, 2007, 23(6): 587-594 (in Chinese).
[14]	ZHOU Lian-tong, HUANG Rong-hui. Interdecadal variability of sensible heat in arid and semi-arid regions of Northwest China and its relation to summer precipitation in China [J]. Chin J Atmos Sci, 2008, 32(6): 1 276-1 288 (in Chinese).
[15]	ZHOU Hao, TANG Hong-yu, CHENG Bing-yan. Relation between the abnormal snow cover in winter and spring over the Tibetan Plateau and summer precipitation over the Southwest China [J]. J Glaciol Geocryol, 2010, 32(6): 1 144-1 151 (in Chinese).
[16]	LI Dong-liang, JI Guo-Liang, LU lan-zhi. The effect of surface heat of the Tibetan Plateau on general circulation over the Northern Hemisphere and climatic anomaly of China [J]. Sci China (Ser D), 2001, 31(suppl): 312-319 (in Chinese).
[17]	KALNAY E, KANAMITSU M, KISTLER R et al. The NCEP/NCAR 40-year reanalysis project [J]. Bull Amer Meteorol Soc, 1996, 77(3): 437-470.
[18]	SMITH T M, REYNOLDS R W, THOMAS C P, et al. Improvements to NOAA’s historical merged land-ocean surface temperature analysis (1880―2006) [J]. J Climate, 2008, 21(10): 2 283-2 296.
[19]	WANG Peng-xiang, HE Jin-hai, ZHENG You-fei, et al. Aridity-wetness characteristics over Northwest China in recent 44 years [J]. J Appl Meteorol Sci, 2007, 18(6): 769-775 (in Chinese).
[20]	XIAO Wei-jun, LIANG Yu-qiong, HE Ju-xiong, et al. Spatial and temporal variations of evaporation over South China in autumn [J]. J Trop Meteorol, 2008, 14(2): 157-160.
[21]	THORNTHWAITE C W. An approach toward a rational classification of climate [J]. Geographical Review, 1948, 38(1): 55-94.
[22]	SNEYERS R. On the statistical analysis of series of observations [R]. Techn Note, 143. Geneva: WMO, 1990: 11.
[23]	TAO Shi-yan. Water requirement and a new classification of climate in China [J] Acta Meteorol Sinica, 1949, 20(4): 43-50 (in Chinese).
[24]	MA Zhu-guo, REN Xiao-bo. Drying trend over China from 1951 to 2006 [J]. Adv Clim Change Res, 2007, 3(4): 195-201 (in Chinese).
[25]	MA Zhu-guo, FU Cong-bin. Decadal variations of arid and semi-arid boundary in China [J]. Chin J Geophys, 2005, 48(3): 519-525 (in Chinese).
[26]	WANG Wen, WANG Jin-ting. Variation trend of surface humid index in China from 1951 to 2009 [J] J Meteorol Environ, 2011, 27(5): 1-6 (in Chinese).
[27]	NORTH G R, MOENG F J, BELL T J, et al. Sampling errors in the estimation of empirical orthogonal functions [J]. Mon Wea Rev, 1982, 110(7): 699-706.
[28]	LI Yong-hua, XU Hai-ming, LIU De. Features of the extremely severe drought in the east of Southwest China and anomalies of atmospheric circulation in summer 2006 [J]. Acta Meteorol Sinica, 2009, 67(1): 122-132 (in Chinese).
[29]	JIAN Mao-qiu, LUO Hui-bang, QIAO Yun-ting. On the relationships between the summer rainfall in China and the atmospheric heat sources over the eastern Tibetan Plateau and the Western Pacific Warm Pool [J]. J Trop Meteorol, 2004, 10(4): 133-143.
[30]	JIN Zu-hui, CHEN Jun. A composite study of the influence of SST warm anomalies over the Western Pacific Warm Pool on Asian Summer Monsoon [J]. Chin J Atmos Sci, 2002, 26(1): 57-68 (in Chinese).
[31]	ZHANG Li-feng, HE Jin-hai, XU Jian-ping, et al. Characteristic analysis of East Asia atmospheric circulation in summers of abnormal years of the Western Pacific Warm Pool [J]. Donghai Marine Sci, 2005, 23(1): 1-12 (in Chinese).

CHARACTERIZATION AND CAUSAL ANALYSIS OF TEMPORAL AND SPATIAL VARIATION IN DRY-WET CONDITIONS IN AUTUMN IN SOUTHWEST CHINA

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