杜诗记载的唐代荆湘地区寒冬及其古气候意义

Cold winters of Jing-Xiang region in Tang Dynasty recorded in Du Fu's poems and their palaeoclimatic significance

中国唐代诗人杜甫(公元712—770年)的诗中,有15首记载了公元768和769年唐代荆湘地区连续2年冬季出现的寒冷气候。公元768和769年冬季,洞庭湖及以南的潭州(今湖南长沙)地区出现降雪,公元769年早春甚至出现洞庭湖局部结冰的现象。杜诗记载的冷冬及洞庭湖结冰事件,在其他史料中未曾发现,是对史料中唐代洞庭湖地区寒冷和结冰记录的补充。公元768和769年气候寒冷事件发生在8世纪中叶以后,是公元750年之后唐代气候变冷过程中的一次重要事件。

Cold winters in Jing-Xiang region in AD 768 and AD 769 of Tang Dynasty were recorded in 1 5 poems of Du Fu （AD 71 2-770）,a poet in Tang Dynasty,China.Snowfall appeared in Dongting Lake and Tanzhou （Changsha,Hunan Province） in winters of AD 768 and AD 769.And Dongting Lake even partly froze in early spring of AD 769.The records of cold weather and freezing in Dongting Lake dur-ing Tang Dynasty were not founded in other historic data,so it is a good complement for the historic re-cords.This two-years cold climatic event in AD 768 and AD 769 was a significant one when the climate turned from warm to cold after AD 750.