Spatiotemporal change pattern of haze days from different time perspective in China (1961～2015)
KONG Feng1,2,3,4， LYU Lili1,2， FANG Jian5， ZHANG Lili2， WANG Zhuoni2
1.Research Centre for Strategic Development， China Meteorological Administration， Beijing 100081； 2.China Meteorological Administration Training Center， Beijing 100081；3.State Key Laboratory of Earth Surface Processes and Resource Ecology， Beijing Normal University， Beijing 100875；4.Academy of Disaster Reduction and Emergency Management， Ministry of Civil Affairs & Ministry of Education， Beijing 100875；5.School of Resources and Environmental Science， Wuhan University， Wuhan 430079
Abstract：Frequent haze weather has become one of the focuses concerned by various circles of the society. In the present work， 2474 station data. From the perspective of interannual， monthly and weekly changes， variation characteristics of haze days in China from 1961 to 2015 were calculated with a variety of methods such as linear trend and inverse distance weight interpolation. The results show that： on the inter-annual scale， average annual haze days present increasing trend with fluctuation， which exhibits three section changes in detail， including increase from 1961 to 1980， stable from 1981 to 2000 and rapid raise from 2001 to 2015. On the monthly scale， on one hand average annual haze days from January to December display a ‘U' shaped distribution. On the other hand， average annual haze days in all month reveal a tendency of increase. On the weekly scale， average annual haze days in China from Monday to Sunday follow the decrease-increase-decrease pattern， while change little. The average annual haze days from Monday to Sunday increased consistency from 1961 to 2015. In space distribution， average annual haze days tend to have the spatial pattern of “southeast increasing significantly-northwest increasing not significantly”. The decadal average annual haze days in Northern China， Central and East China and Southern China area gradually vary with time from the negative anomaly evolution to positive anomaly. Area with average annual haze days in January and December more than 2.7 d/a has a wide distribution， while that with the other months range is relatively small. Area with average annual haze days from Monday to Sunday more than 4.5 d/a are mainly distributed in the area ofBeijing and Tianjin， the Yangtze River Delta， Pearl River Delta， Shanxi and Shaanxi area. By contrast it is found that in different weeks the average annual haze days in spatial distribution changes little.
孔 锋,吕丽莉,方 建,张黎黎,王卓妮. 不同时间角度下的中国霾日数时空变化格局研究(1961年～2015年)[J]. 华中师范大学学报(自然科学版), 2017, 51(3): 370-377.
KONG Feng,LYU Lili,FANG Jian,ZHANG Lili,WANG Zhuoni. Spatiotemporal change pattern of haze days from different time perspective in China (1961～2015). journal1, 2017, 51(3): 370-377.
[2] GUO S， HU M， ZAMORA M， et al.Elucidating severe urban haze formation in China[J].Proceedings of the National Academy of Sciences of the United States of America， 2014， 111(49)：17373-17378.
2017, Vol. 51 
