根据厦门湾一九龙江口地区3个钻孔的孢粉组合特征分析,结合沉积相和年代数据,探讨本区晚更新世以来的古气候和古环境演变。孢粉分析结果表明,MIS4阶段早期以来该区的古气候演变包括:晚更新世偏冷干一早中全新世 (约8~5. 5 cal. ka BP) 温干转热湿一晚中全新世 (约5. 5 ~2. 5 cal. ka BP) 较暖湿转温和稍干一晚全新世(约2.5 cal. ka BP至今)暖湿等的波动和变化。晚更新世全球范围的大幅降温在本区影响较大,全新世气候变化的特点是温湿度在一定幅度中波动,人类活动对植被的干扰在晚全新世以来有明显的体现。
英文摘要:
According to pollen assemblage analysis of 3 boreholes in Xiamen Bay-Jiulong River Estuary region,combined with the results of sedimentary facies and dating analysis, this paper explore the paleoclimatic and paleoenvironmental evolution in this area since Late Pleistocene. Pollen analysis show that: since the early stage of MIS4,the main paleoclimatic evolution of the region includes the fluctuations and changes such as: slightly dry-cold in Late Pleistocene, dry-warm then wet-warm in early Mid Holocene (8 ~5. 5 cal. ka BP) , wet-warm then slightly moderate-dry climate in late Mid Holocene (5. 5 ~2. 5 cal. ka BP) and wet-warm in Late Holocene (since 2. 5 cal. ka BP) . Global scale substantial cooling event in Late Pleistocene impacts clearly in this area. Characteristic of the climate change in Holocene is that the temperature and humidity varies fluctualy between some ranges. The human activity infects clearly the vegetation form since Late Holocene.