great ice age 中文意思是什麼
great ice age
解釋
大冰河期-
The dry / wet changes of surrounding area of bohai sea during past 500 years are divided into 7 stages, based on dry / wet indexes ( d / w ) of this area from 1470 to 1985 then, the changes of dry / wet spatial types ( d / wst ) and its related dry / wet regional different iation ( d / wrd ) features among different stages are analyzed. the results show that there are 4 main kinds of d / wst in this area, whose notability and spatial distribution features in different stages are apparently different, which reflects, very well, the changing process of the d / wrd of this region in past500 years. further analysis also presents that, in warmer period, the d / wst and the d / wrd patterns are relatively unsteady, meanwhile, the dry / wet changing difference among different parts of the region is relatively great, but, in colder period, it is just on the contrary. however, in the most severely cold period of the little ice age, t he area ' s d / wst and the d / wrd pattern sareveryu nsteady, and its d / wrd extenti salsot he high estin the whole past 500 years
用研究區1470 1985年的旱澇等級資料，劃分了該地區500年來旱澇變化的7個階段，討論了不同階段間旱澇型的變化及其旱澇區域分異意義，結果表明， 500年來研究區有4類主要旱澇型，各型旱澇在不同階段的重要程度及場型特徵均有較大差異，深刻反映了該地區500年來旱澇區域分異特徵的變化，通過對500年來旱澇變化與溫度變化的對比發現，較溫暖期，研究區的旱澇型及旱澇區域分異格局較多變，旱澇變化的區域差異性較大，較寒冷期，旱澇型及區域分異格局較穩定，旱澇變化的區域差異性較小，而在小冰期最寒冷階段，旱澇型及旱澇區域分異格局的變動十分頻繁，旱澇變化的區域差異性亦最大
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