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对渤海西部近海5个钻孔的沉积物作了孢粉和藻类分析研究。渤海西部海域全新世孢粉组合可划分出三个孢粉带,反映了不同的气候时代。(1)Artemisia—Chenopodiceae—Pinus孢粉组合带,反映了温暖略干气候——北方期:(2)Pinus—Chenopodiaceae—Artemisia—Quercus孢粉组合带,反映了温湿气候——亚北方期:(3)Chenopodiaceae—Artemisia—Pinus—Quercus孢粉组合带,反映了温干气候——亚大西洋期;渤海西岸近海全新世和晚更新世的界限约在10000年左右。
Pollen and algae were analyzed for sediment from 5 boreholes in the western Bohai Sea. The sporopollen assemblage in the western Bohai Sea can be divided into three sporopollen zones, reflecting different climatic ages. (1) Artemisia-Chenopodiceae-Pinus sporopollen assemblage, reflecting a warmer, slightly dry climate-northern stage: (2) Pinus-Chenopodiaceae-Artemisia-Quercus sporopollen assemblage reflecting the warm-humid climate - (3) The sporopollen assemblages of Chenopodiaceae-Artemisia-Pinus-Quercus reflect the warm-dry climate-the Atlantic Ocean period. The limit of offshore Holocene and Late Pleistocene around the Bohai Sea is about 10000 years.