On January 9, 2014, China Meteorological Administration issued the China Climate Bulletin 2014 in Beijing.
The general characteristic of China climate in 2014 was warmer than normal while the mean annual total precipitation was near normal. The weather and climate extreme events happened less frequently than that in 2013 with lighter hazards caused by heavy rainfall, floods and droughts. The people of mortalities and missing and hazard areas were significantly less than normal. In general, 2014 was a year with less meteorological disasters.
In 2014, the annual mean air temperature over China was 0.5℃ above normal which was the sixth warmest year together with 1999 since 1961. It was obviously warm in North China. Temperatures were above normal in spring, summer, autumn and winter for the country as a whole. The mean of annual total precipitation in 2014 in China was 636.2mm; it was near normal with 3% less than that in 2013. The precipitation was obviously less in Liaoning Province, Hebei Province, Beijing and Tianjin with severely uneven spatial and temporal distribution. The seasonal total precipitation was near normal in winter, spring and summer, but above normal in autumn.
In 2014, the first rainy season in South China began earlier with a larger amount of precipitation than normal. The rainy season in Southwest China started later and ended earlier with a smaller amount of precipitation than normal. The precipitation in Meiyu region was more in south and less in north while Jianghuai area missed Meiyu during this summer. The rainy season in North China was not clear. The beginning of autumnal rain of Huaxi (Western China) started earlier and ended later with a larger amount of precipitation than normal. From the viewpoint of regions and basins, the total annual precipitations were 5% and 4% more than normal in Southwest China and the middle and low reaches of Yangtze River basin separately. It was less than normal in Northeast China (14% less) and North China. The precipitations in Northwest China and South China were near normal. The total annual precipitation was 10% more than normal in Yellow River Basin, while less than normal in Liaohe River Basin (27% less, the least since 1961), Haihe River Basin (18% less) and Huaihe River Basin. The precipitations of Songhuajiang River Basin, Yangtze River Basin and Zhujiang River Basin were near normal.
In 2014, some regions of South China suffered a large number of heavy rains and floods, and autumnal rainfall in Huaxi and Huanghuai areas was frequent. Northeast China and Huanghuai area suffered serious summer droughts; North China and Huanghuai area experienced extremely high temperatures in May and the middle and low reaches of Yangtze River basin experienced cool summer. There was less number of typhoons, but the intensity of typhoons was strong when landing. Super typhoon Rammasun caused severe disasters. In 2014, the mean wind speed and the number of days with light wind were more than that in 2013 in China, while in those days the meteorological conditions were not conducive to the diffusion of atmospheric pollutants. There were 13 events of large-scale and persistent haze in whole country in 2014.
Editor Shi Long