1. Sichuan Province Agricultural Meteorological Center, Chengdu 610072, China
2. Sichuan Key Laboratory of Water-Saving Agriculture Research in Southern Hilly Area, Chengdu 610066, China
3. Institute of Plateau Meteorology, China Meteorological Administration, Chengdu 610072, China
4. Faculty of Environmental Science, The University of Sydney, Sydney 2006, Australia
5. Meteorological Bureau of Aba, Maerkang 624000, China