%0 Journal Article
%T Identifying Regional Prolonged Low Temperature Events in China<br>
%A ZHANG Zongjie
%A QIAN Weihong
%A <br>
%J 大气科学进展
%D 2011
%I 
%X This study examined regional prolonged low temperature (PLT) events in China from the observational station data for the period 1960--2008 using the new criteria. The new definition of a site PLT event is that the daily minimum temperature does not exceed the 10th percentile threshold of the local daily minimum temperature climatology for at least 5 days at a station. The regional PLT event is defined as at least five adjacent stations exhibiting site PLT simultaneously for >5 d. Under the new definition, 552 regional PLT events were identified, and three indices: duration, extent, and intensity, as well as a comprehensive index (CI) were used to quantify the event severity. In addition, geographical patterns and temporal variations of regional PLT events were investigated using three event categories: strong, moderate, and weak. Spatially, strong events were mainly located in the north of Xinjiang and along the Yangtze River to the south of the Yangtze River; moderate events occurred in Xinjiang and south of the Yangtze River; and weak events occurred south of the Yellow River. The variation for the annual frequency of regional PLT events in China in the last 49 years showed a significant decreasing trend with a rate of -1.99 times per decade, and the significant transition decade was the 1980s.
%K regional prolonged low temperature
%K extreme event
%K duration index
%K comprehensive index
%K spatiotemporal variation<br>
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=E62459D214FD64A3C8082E4ED1ABABED5711027BBBDDD35B&cid=28A2F569B2458C17&jid=5434AFBF6CB6E7E8D67733B541F211C7&aid=5A90D3A5C80BBB679C02A7B21DE25981&yid=9377ED8094509821&vid=D3E34374A0D77D7F&iid=0B39A22176CE99FB&sid=302684F6FB4B24FF&eid=381FB4265090A8E0&journal_id=0256-1530&journal_name=大气科学进展&referenced_num=0&reference_num=35