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作为全球变化研究中核心项目之一的PAGES(过去全球变化),把过去2ka以来的全球气候环境变化研究作为一个极为重要的时段,运用多种研究手段,集中进行攻关。在中国东部,从竺可桢通过物候资料和历史资料所恢复的过去5ka来的温度变化曲线,可以大致判断过去2ka来的气候变化。在青藏高原,吴祥定等曾在拉萨根据不同树木年轮资料衔接的办法,恢复了过去2ka来该地区气候变化历史。本文根据古里雅冰芯的记录,恢复了这一时期气候和环境变化的历史。这一记录不但分辨率高(以年计)、记录连续(是一整根冰芯上的连续记录),而且同时提供多种参数(气候和环境),便于进行气候和环境变化的综合研究。
PAGES (Past Global Change), one of the core projects in the study of global change, takes the study of global climate and climate change since the past 2 ka as an extremely important time period and uses various research methods to focus its research. In the eastern part of China, the climate change over the past 2 ka can be roughly judged from the temperature change curve of the past 5 ka recovered by Zhu Kezhen through phenological data and historical data. On the Qinghai-Tibet Plateau, Wu Xiangding and others once worked together in Lhasa to restore the history of climate change in the region in the past 2 ka. Based on the record of the Guli ice core, this article has restored the history of climate and environmental changes during this period. This record is not only high resolution (in years), continuous recording (continuous recording on a single ice core), but also offers a wide range of parameters (climate and environment) for a comprehensive study of climate and environmental changes.