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利用丰富的历史文献,研究了中世纪暖期中国东部地区增温对其他自然要素的影响。发现中世纪暖期升温迅速,在增温最快的40a间,每10a平均升温超过了0.5℃。冬季开始日期延后,冬小麦、茶树、柑橘、甘蔗等作物的分布区向北扩展,亚热带北界和暖温带北界均向北移动了一个纬度左右。而从降水格局的变化来看,华北降水偏多,导致了黄河多次改道、河患频繁。农牧交错带地区亦相对湿润,农业得到发展。同时,中世纪温暖期太湖地区水面抬升,排水困难,水系格局发生变化,可能也与升温导致海平面上升有关。
Using rich historical documents, we studied the influence of warming on the other natural elements in eastern China during the Middle Ages. It was found that the warm period of Middle Ages heated up rapidly, and the average temperature rose more than 0.5 ℃ in the 40s with the fastest temperature increase. The start of winter is delayed, and the distribution of crops such as winter wheat, tea tree, citrus and sugar cane expands northward. Both the northern subtropical zone and the northern boundary of warm temperate zone move northward by about one latitude. However, from the change of precipitation pattern, the precipitation in North China is too much, leading to several diversions of the Yellow River and frequent river sickness. The ecotone between agriculture and animal husbandry is also relatively humid and agriculture has developed. At the same time, the water surface in Taihu Lake during the Middle Ages was warm and the drainage was difficult. The pattern of the water system changed, which may also be related to the sea level rise caused by the warming.