%0 Journal Article
%T Interdecadal Change in Frequency of Dust-Haze Episodes in North China Plain<br>京津冀平原地区灰霾天气的年代变化
%A WANG Xiquan
%A SUN Mingsheng
%A YANG Ting
%A WANG Zifa
%A <br>王喜全
%A 孙明生
%A 杨婷
%A 王自发
%J 气候与环境研究
%D 2013
%I 
%X The authors report on the first-time use of 1961-2006 hourly visibility data from 15 airports to investigate the interdecadal variation of dust-haze episodes in the North China Plain. The preliminary results show that (1) the evolution of the frequency of dust-haze weather showed interdecadal change characteristics from the 1990s until recent years, with dust-haze episodes evolving from local to regional scale. (2) Between the 1970s and 1990s the frequency of dust-haze episodes increased in the megacities (e.g. Beijing, Shijiazhuang), while decreasing in mid-size and small cities; this has important implication for dust-haze control strategies. (3) Before the 1970s the frequency of dust-haze episodes in the Beijing area (about 100 days per year) was almost the same as in the Shijiazhuang area; however, after 1975 the dust-haze episode frequency in the Shijiazhuang area increased rapidly and recent figures show that it is more than 100 d-higher than in the Beijing area. Considering the impact of urbanization on dust-haze conditions and the fact that the extent of urbanization in the Beijing area is much larger than that in the Shijiazhuang area, this interesting initial find deserves further investigation.
%K Dust-haze episode
%K Visibility
%K Interdecadal change
%K North China Plain<br>灰霾天气
%K 能见度
%K 年代变化
%K 京津冀平原地区
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=E62459D214FD64A3C8082E4ED1ABABED5711027BBBDDD35B&cid=28A2F569B2458C17&jid=484C10BAB5333C14751916EACFF8295F&aid=BE7E4E47A19ED56FB08C095E61DD3602&yid=FF7AA908D58E97FA&vid=13553B2D12F347E8&iid=0B39A22176CE99FB&sid=31611641D4BB139F&eid=C5F8B8CB20F1B3D8&journal_id=1006-9585&journal_name=气候与环境研究&referenced_num=0&reference_num=12