【摘要】 根据该地层剖面不同时期泥炭地层的孢粉类型、数量的变化 ,将该不同年龄段剖面中出现的孢粉划分为六个孢粉组合带。利用不同时段孢粉类型及数量变化所反映的森林生态环境 ,重塑了不同时期的古气候特征。可概括为 :从距今 1 6万年晚更新世晚期 ,经冰后期晚更新世与早全新世分界 ,再经中全新世至晚全新世直到目前 ,经历了冰后期一个短暂转暖期 -寒冷 -温冷到温暖 -温暖微干 -温凉 -温暖这一变化趋势。雷波小海子地处凉山州东部边缘 ,临近金沙江河谷 ,由于受黄茅埂高山阻隔和金沙江河谷干热气候影响 ,故自 1 6万年以来气候变化波动较小 ,而与布拖县西溪河火烈湖 2 2万年以来古气候有不同变化趋势更多还原

【Abstract】 According to spore-pollens types and their numerical variations in peat strata of different periods in Small Lake located in Leibo county in Sichuan,spore-pollens found in soil have been divided into six combinative belts in different age stages.Ancient climatic characteristics in different periods have been reconstructed by means of forest ecology environment reflected by these changes.It can be generalized that climate varied from little warm in later glacial period,cold,warm-cold,to warm,a little dry warm,warm-cool,warm,from the late Pleistocene 16 thousand years ago,between the late Pleistocene of later glacial period and the early Holocene,the middle and late Pleistocene,until the present.Small Lake in Leibo county is located in the east ridge of Liangshan state,and near to the river valley of the Jinsha River.Effected by Huanmaogen Mountain and the Jinsha River valleys’ dry-hot climate,climate varied less from 16 thousand years,which showed different change trends in comparision with ancient climate in Huolie Lake in the Xiqi River of Butuo County since 22 thousand years.更多还原