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据高分辨率的青海都兰树轮年表 ,将过去 2 0 0 0年的气候变化划分为 2 30’S以前的高温期 ,2 40’S～ 80 0’S冷暖波动强烈的低温期 ,810’S～ 10 70’S显著高温期 ,即中世纪暖期 ,10 80’S～ 1880’S的低温期 ,其中包括 142 0’S～1870’S的小冰期 ,以及 1890’S后的升温期。统计发现 11次极端高温或低温事件 ,以及几次大的突变事件全部出现于中世纪之前 ,指示 15 0’S～ 110 0’S期间气候运行的高度不稳定性。和中国东部、古里雅冰芯和青藏高原南部温度代用资料比较后发现 ,公元初至 3世纪前期的东汉暖期 ,3世纪后期至 7世纪初的魏晋南北朝冷期 (期间约380’S～ 46 0’S暖 ) ,中世纪暖期以及小冰期等几次重大的气候事件在中国东部、都兰和青藏高原南部序列中均存在。古里雅冰芯仅记录了前两次重要事件 ,中世纪暖期以及小冰期在该序列中表现微弱。 2 0世纪的升温在古里雅冰芯最显著 ,都兰、中国东部次之 ,而高原南部似乎不明显。
According to the high resolution Qinghai Dulan tree round chronology, the past 200 years of climate change is divided into 2 30’S before the high temperature period, 2 40’S ~ 80 0’S strong cold and warm fluctuations in the low temperature period, 810’S ~ 10 70’S significantly high temperature Period, that is, the Middle Ages warm period, the low temperature period of 10 80’S ~ 1880’S, including the small ice age of 142 0’S ~ 1870’S, and the temperature rising period after 1890’S. Statistics show that 11 extreme high temperature or low temperature events, and several large mutation events all occurred before the Middle Ages, indicate a high degree of instability of climate operations during the period from 15 s to 110 s. Compared with the temperature substitution data of eastern China, Guliya ice core and southern Tibet Plateau, it is found that during the warm-up period of the Eastern Han Dynasty from the early AD to the early of the 3rd century, from the late 3rd century to the beginning of the 7th century (about 380’S ~ 460 ’ Warm), Middle Ages, and the Little Ice Age, several major climate events occurred in the sequences of the eastern part of China, Dulan and the southern Tibetan Plateau. The Gorey Ice Core recorded only the first two major events, with a weak performance in the sequence during the Middle Ages and the Little Ice Age. The warming of the 20th century was most pronounced in the Guli ice core, Dulan, followed by eastern China, while the southern part of the plateau did not seem obvious.