%0 Journal Article
%T Changes of the Temporal-spatial Distribution of Epidemic Disasters in 770BC-AD1911 China<br>中国疫灾的时空分布变迁规律
%A GONG Shengsheng
%A <br>龚胜生
%J 地理学报
%D 2003
%I 
%X Historically China was a country with high epidemic frequency which was as high as 25% during 770BC-AD1911. The changes of the epidemic frequency in historical China had closely corresponded with temperature variations climatically. The high frequency periods of epidemics often occurred in the cold spells whereas the sparse periods usually dropped into the warm spells; the colder the climate was, the more frequent the epidemic was, and the longer the cold spell of climate went on, the longer the climax period of the epidemic lasted. For example, the cold era of the Wei, Jin and Southern & Northern dynasties from the 3rd century through the 6th century was the first epidemic climax, the "little ice age" of the Ming and Qing dynasties from the 14th century through the 19th century formed the second epidemic climax. For the past 3000 years China's epidemic frequency had a long-term increasing tendency due to the increasing older climate trend. The general characters of China's epidemic distribution showed that epidemic prevalence in the cities was more severe than in the countryside, and there were more frequent epidemic disasters in the capital city and its environs, densely populated areas, natural epidemic foci, or frequent natural disaster affected areas. The process of regional development and earth-surface humanization had significant impact on the changes of epidemic geographical distribution, the distributional area of epidemics in China during 770BC-AD1911 was radiated gradually from the middle and lower Yellow River, and the core of epidemics showed a shifting trend both from north to south and from east to west.
%K epidemic
%K disaster
%K epidemic
%K frequency
%K epidemic
%K distribution
%K distributional
%K evolution
%K climatic change
%K historical period<br>中国
%K 疫灾
%K 时空分布
%K 变迁规律
%K 研究方法
%K 疫灾指数
%K 变化规律
%K 空间分布
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=E62459D214FD64A3C8082E4ED1ABABED5711027BBBDDD35B&cid=869B153A4C6B5B85&jid=F7B5B947C24B9D649491012214E4BEF4&aid=271F45D18921FB99&yid=D43C4A19B2EE3C0A&vid=9FFCC7AF50CAEBF7&iid=B31275AF3241DB2D&sid=971ECAFE8682845B&eid=2D207DE75533FA7E&journal_id=0375-5444&journal_name=地理学报&referenced_num=15&reference_num=78