Precipitation and temperature trends for the Southwest China: 1960–2007

Daily temperature and precipitation data from 136 stations of Southwest China (SWC) during the last five decades, from 1960 to 2007, were analysed to determine the spatial and temporal trends by using the Mann-Kendall trend test. Results show that SWC has become warmer over the last five decades, especially in the recent 20-25 years. The increasing trends in winter months are more significant than those in the months of other seasons, and spatially Tibet, Hengduan mountains area and west Sichuan Plateau have larger temperature trend in magnitude than the other regions have. A downward trend was detected in Sichuan Basin also, but the region with cooler temperature was shrinking due to the statistically significant increasing trend of temperature after 1990s. Both annual and seasonal means of daily maximum and minimum temperatures show an increasing trend, but trend magnitude of minimum temperature was larger than that of maximum temperature, resulting in the decrease of diurnal temperature range for SWC in the last 50 years. Annual precipitation showed slightly and statistically insignificant increasing trend, but statistically significant increasing trend has been detected in winter season while autumn witnessed a statistically significant decreasing trend. The results could be a reference for the planning and management of water resources under climate change. Copyright (C) 2010 John Wiley & Sons, Ltd.

[1]  Guobin Fu,et al.  Hydro-Climatic Trends of the Yellow River Basin for the Last 50 Years , 2004 .

[2]  G. Fu,et al.  Hydro‐climatic variability and trends in Washington State for the last 50 years , 2010 .

[3]  S. Charles,et al.  A two‐parameter climate elasticity of streamflow index to assess climate change effects on annual streamflow , 2007 .

[4]  Jun Yu Li,et al.  Decadal trend of climate in the Tibetan Plateau—regional temperature and precipitation , 2008 .

[5]  Guobin Fu,et al.  A critical overview of pan evaporation trends over the last 50 years , 2009 .

[6]  Li Wei,et al.  Climatological Characteristics of Water Vapor Transport over Eastern Part of Qinghai-Xizang Plateau and Its Surroundings , 2005 .

[7]  Y. Qian,et al.  Decreasing trends in sunshine duration over China for 1954–1998: Indication of increased haze pollution? , 2002 .

[8]  M. Kendall.  Rank Correlation Methods , 1949 .

[9]  Climate Changes in the Tibetan Plateau during the Last Three Decades , 2005 .

[10]  ANALYSIS OF RAINFALL TREND AND EXTREME EVENTS IN GUIZHOU , 2007 .

[11]  Yun Qian,et al.  Regional climatic effects of anthropogenic aerosols? The case of southwestern China , 2000 .

[12]  D. Helsel,et al.  Statistical methods in water resources , 2020, Techniques and Methods.

[13]  Tian Hong,et al.  Climate Variation of Southwest China in Recent 40 Years , 2006 .

[14]  Kevin P. Gallo,et al.  A new perspective on recent global warming: asymmetric trends of daily maximum and minimum temperature , 1993 .

[15]  Li Yue-qing.  Analyses of Cloudiness,Sunshine,Temperature and Daily Range on the Eastern Side of Qinghai-Xizang Plateau in Recent 40 Years , 2002 .

[16]  Vincent R. Gray.  Climate Change 2007: The Physical Science Basis Summary for Policymakers , 2007 .

[17]  Changming Liu,et al.  Investigating the conversion coefficients for free water surface evaporation of different evaporation pans , 2004 .

[18]  Thian Yew Gan,et al.  Hydroclimatic trends and possible climatic warming in the Canadian Prairies , 1998 .

[19]  Song Yang,et al.  Long‐term climate variations in China and global warming signals , 2003 .

[20]  M. Kendall,et al.  Rank Correlation Methods , 1949 .

[21]  G. Fu,et al.  Impacts of Climate Change on Regional Hydrological Regimes in the Spokane River Watershed , 2007 .

[22]  F. Giorgi,et al.  Direct radiative forcing and regional climatic effects of anthropogenic aerosols over East Asia: A regional coupled climate‐chemistry/aerosol model study , 2002 .

[23]  Guobin Fu,et al.  Trends of major hydroclimatic variables in the Tarim River basin during the past 50 years , 2010 .

[24]  Chen Zheng-quan.  Regional Features of Summer Rainfall Anomaly over Southwest China , 2002 .

[25]  Yanyan Zhang,et al.  Responses of China's summer monsoon climate to snow anomaly over the Tibetan Plateau , 2003 .

[26]  H. B. Mann.  Nonparametric Tests Against Trend , 1945 .

[27]  S. Yue,et al.  Canadian streamflow trend detection: impacts of serial and cross-correlation , 2003 .

[28]  Guobin Fu,et al.  Decadal Climatic Variability, Trends, and Future Scenarios for the North China Plain , 2009 .

[29]  Ban Jun-mei.  ANALYSIS OF CHARACTERISTICS OF TEMPERATURE VARIATIONS IN SOUTHWEST CHINA IN RECENT 50 YEARS , 2006 .

[30]  T. Zhao,et al.  Long‐term trends in sunshine duration over Yunnan‐Guizhou Plateau in Southwest China for 1961–2005 , 2008 .

[31]  P. Sen.  Estimates of the Regression Coefficient Based on Kendall's Tau , 1968 .

[32]  F. Giorgi,et al.  Regional climate effects of aerosols over China: modeling and observation , 2003 .

[33]  Xie Ming-en.  The Analysis of Regional Climate Change Features over Yunnan in Recent 50 Years , 2008 .

[34]  W. Qian,et al.  Precipitation division and climate shift in China from 1960 to 2000 , 2008 .

[35]  R. Hirsch,et al.  Techniques of trend analysis for monthly water quality data , 1982 .

[36]  Jun Yu Li,et al.  Long‐term trend analysis for major climate variables in the Yellow River basin* , 2007 .