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VEGETATION AND ENVIRONMENTAL VARIATIONS SINCE HOLOCENE IN MIANNING AREA, SICHUAN PROVINCE
Author(s): 
Pages: 460-477
Year: Issue:  4
Journal: ACTA MICROPALAEONTOLOGICA SINICA

Keyword:  孢粉序列高分辨率全新世彝海四川;
Abstract: 依据彝海洼地钻孔高分辨率的孢粉时间序列,探讨了安宁河谷近10Ka来的古植被及古环境变迁.本区全新世大暖期以山毛榉科花粉连续的大量出现为标志,时间为8.8~2.6KaBP,前期温暖湿润,后期温热半湿,且冬季干旱化.气候波动明显存在3.5Ka,1Ka及0.25h的准周期.近3Ka年来气候经历了两次大的干湿冷暖变化,可划分为四个气候期,基本为凉湿暖干的组合型式,降水量的变化与南极有可比性.
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