南极普里兹湾1.5万年来气候演变的沉积记录

Paleoclimatic evolution recorded in sediments of the Prydz Bay,Antarctica in 15 000 years

南极普里兹湾两沉积柱样代表了１．５万年来的沉积记录。其粒度特征、矿物成分、硅藻分布和地球化学等沉积特征表明，沉积记录对气候变化的反应十分敏感，尤其是发现１４３１０ａＢＰ前后的Ｈｅｉｎｒｉｃｈ事件，据此将该区１．５万年来的古气候演化划分为８个阶段。

Two cores from the Prydz Bay , Antarctica have been recorded paleoclimatic change in 1 5 000 years. The characteristics of the grain size . mineral composition . diatom assemblage and geochemistry are sen- sitive to the paleoclimatic change . and especial the Heinrich Eventaround 14. 31 ka is discovered. On the basis of the above study . paleoclimatic evolution can be divided into eight stages : Ⅰ. Older Dryas , Ⅱ. Heinrich Event 1 , Ⅲ. Bolling-Allerod , Ⅳ . Younger Dryas , Ⅴ. changing warm period , Ⅵ . suitable period , Ⅶ. warm period , Ⅷ . cool period.