过去2000年来青藏高原气温变化及对人类活动的影响

发布时间：2018-07-04 14:17

本文选题：青藏高原 + 过去年　；参考：《青海师范大学学报(自然科学版)》2016年03期

【摘要】：选取24条明确指示气温的树轮、冰芯和沉积物等高分辨率环境记录,提取1981条气温记录,采用单样本订正-多样本平均集成法重建青藏高原过去2000年十年分辨率气温序列.该序列表明过去2000年温暖时段主要发生在0-235AD、775-1275AD和1845-2000AD,冷时段在245-765AD、1045-1145AD和1385-1835AD.小冰期在青藏高原表现明显,最冷时段为1635-1675AD;19世纪气温开始转暖,并在20世纪后期突破过去2000年的极值.过去2000年气温变化对人类社会影响较为显著,245-765AD是过去2000年持续时间最长的冷期,正值魏晋南北朝时期,季风衰弱,季风分界线南移,植被带南移,导致逐水草而居、生活在原季风分界线的鲜卑秃发部和吐谷浑部等南迁,同时历史时期气温变化区域战争、气象灾害等息息相关.
[Abstract]:Twenty-four high-resolution environmental records, such as tree rings, ice cores and sediments, were selected and 1981 air temperature records were extracted. The single-sample correction and multi-sample average integration method was used to reconstruct the resolution temperature series of the past ten years over the Qinghai-Tibet Plateau in the past 2000 years. This sequence indicates that the warm periods occurred mainly in 0-235AD 775-1275AD and 1845-2000AD in the past 2000, and the cold periods were 245-765AD1045-1145AD and 1385-1835AD. The small ice age is obvious in the Qinghai-Xizang Plateau, the coldest period is 1635-1675 ADT, the temperature began to warm in the 19th century, and broke through the extreme value of the past 2000 years in the late 20th century. The temperature change in the past 2000 had a more significant impact on human society. It was the longest cold period of the past 2000. During the Wei, Jin and Northern and Southern dynasties, the monsoon weakened, the boundary of the monsoon moved southward, and the vegetation belt moved southward, leading to the displacement of water and grass. Xianbei baldness and Tuguhun, which live in the boundary of the original monsoon, are also closely related to the regional wars and meteorological disasters during the historical period.
【作者单位】：青海师范大学生命与地理科学学院;青海省基础地理信息中心;
【基金】：国家自然基金项目(41550001)资助
【分类号】：K207;P423.3

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