The general outline of China climate in 2011 can be characterized by words warm and dry. The annual mean temperature was 0. 5℃ higher than normal, which ranked the 15th consecutive warm year since 1997. The mean annual total precipitation over China was 556.8 mm, 9% less than normal, which ranked the least since 1951. In 2011, there had no severe large-scale persistent droughts and basin flooddisasters occurring in China, the losses related with low temperature and snow disasters, local strong con- vection weather, and tropical cyclones were less than normal. However, the regional and period meteoro- logical hazards were abrupt and frequent in 2011. In early 2011, North China, Yellow River and HuaiheRiver Basin （Huanghuai） experienced the most serious autumn-winter droughts in recent 41 years. The Middle and Lower Reaches o{ Yangtze River experienced the most serious winter-spring droughts in recent 60 years, and abrupt transition from drought to flooding appeared in June. The Southwest China experi-enced the most serious summer-autumn droughts in recent 60 years. The Huaxi （West China） and Huang- huai experienced the obviously regional distinct floods in autumn. The southern part of South China expe rienced comparatively serious rainstorm disasters in October. The heavy rainfall caused water logging andinundation in big cities such as Beijing during the summer and autumn. The persistent hot waves hit most parts of South China in summer, meanwhile the maximum temperature in multi-areas broke the historical record. The Typhoon Nesat and Muifa influenced wide areas in China and brought serious losses. In aword, the year 2011 has been a normal and relatively slight year in terms of meteorological disasters withrelatively more direct economic losses and the least death toll and affected areas since 1990.%2011年，我国气候总体呈现暖干特征。全国年平均气温较常年偏高0．5℃，为1997年以来连续第15个暖年；年降水量556．8mm，较常年偏少9％，为1951年以来最少。年内，我国未出现大范围持续性严重干旱和流域性洪涝灾害，低温冰冻和雪灾、局地强对流、热带气旋灾害较轻。但区域性、阶段性气象灾害频发。华北、黄淮出现近41年来最重秋冬连旱；长江中下游出现近60年来最重冬春连旱，6月旱涝急转，发生暴雨洪涝灾害；西南出现近60年来最重夏秋旱；华西和黄淮秋汛明显；华南南部10月发生较重暴雨灾害；强降水造成北京等大城市发生内涝；夏季南方大部持续高温，多地高温破历史纪录；台风纳沙、梅花影响范围广、致灾程度较重。2011年中国气象灾害为正常偏轻年份，直接经济损失偏多，死亡人数和受灾面积均为1990年以来最少。
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