中国高分辨气候记录与全球变化

2001年第一届全国高分辨率气候记录会议提出,用3～5年时间,建立几个较长的可靠的高分辨气候记录。文章介绍了经过几年的努力工作已经获得的数个千年及更长的记录,这些记录数据多已在世界数据中心向科学家公开并很快为科学界引用,从而结束了国际高分辨气候记录数据库极少中国千年气候重建数据的历史;通过对比最近2000年来中国的高分辨气候记录和北半球其他高分辨记录,发现数个世纪的缓慢变冷紧随世纪尺度快速变暖的气候变化模式至少在半球范围是准千年重现的,这一结果指出,我们应该从更长时间跨度的气候旋回自然背景来诊断20世纪的快速变暖

HIGH-RESOLUTION CLIMATIC RECORDS OF CHINA AND GLOBAL CHANGE

In the late 1990's, a new commission on the High-Resolution Climatic Record belonging to the China Quaternary Research Association was founded. This commission aims at organizing high-resolution records such as tree rings, ice cores, corals, varves, stalagmites and historical documents to study paleoclimate changes especially the ones occurred within the mostly recent history. In the first regular meeting in 2001, Chinese scientists planned to establish several available millennial or longer high-resolution proxy climate records in 3 to 5 years. Since then, several Chinese datasets have submitted to the WDC (the World Data Center) and are available to scientists all over the world, such as 1)winter half-year temperature reconstruction for the middle and lower reaches of the Yellow River and Yangtze River, China, during the past 2 000 years (Ge Q. et al.The Holocene, 2003, 13: 933 ～ 940), 2)general temperature records in China during the last two millennia (Yang B. et al.Geophysical Research Letters,2002, 29: 381 ～ 384), 3)2 326-year tree-ring record of climatic variability on the northeastern Qinghai-Tibetan Plateau (Zhang Q-B. et al. Geophysical Research Letters,2003, 30: 1 739 ～ 1 742) and 4)2 650-year stalagmite record of warm season temperature of Beijing (Tan Ming et al. Geophysical Research Letters, 2003, 30: 1 617 ～ 1 620). Comparing the records from China with others from the Northern Hemisphere, we reveal pronounced cyclic rapid warming on centennial-scale: each episode of warming followed a multi-centennial-cooling trend similar to the saw-toothed alternation of glacial/interglacial periods. All centennial to sub-millennial scale cycles could be connected to solar variation cycles of about 208a, 350a, 700a and 950a. The results well correlate with different records from the Northern Hemisphere, indicating that the periodic alternation between cool and warm periods on a sub-millennial scale had a sub-hemispherical influence.