许嘉莉,李飞龙,彭诗云,孔德明,徐利强

• 1:广东海洋大学海洋与气象学院/广东省近海海洋变化与灾害预警重点实验室
• 2:合肥工业大学资源与环境工程学院

摘要(Abstract)：

【目的】研究北部湾近千年的环境演变及其气候驱动因素。【方法】利用北部湾沉积柱BBG01及BBG02的长链烯酮重建过去千年的海表温度变化，并结合沉积物正构烷烃和粒度特征，探讨其气候驱动因素。【结果】北部湾海表温度近千年来整体下降约2℃，1900年到达最低值，与小冰期以来冬季风加强和中国冬季气温降低的趋势一致。BBG02的正构烷烃指示陆源输入1000―1300年较高，1300年后骤降，1700年后上升，此阶段中粒度端元2（粒径7.64～<24.10μm）相似的趋势指示热带辐合带迁移对陆地植被和陆源输入的影响，而平均粒径和较粗粒度端元3（粒径24.10～86.40μm）的增加与和海表温度下降一致。【结论】北部湾海表温度近千年的变化与全球不一致。其下降趋势与粗粒径增加的共同趋势表明在过去千年该区域主要受冬季风和大陆温度驱动，而长链烷烃和中粒径端元2反映了由ITCZ和夏季风控制的降水量变化。

关键词(KeyWords)： 北部湾;海表温度;长链烯酮;正构烷烃;粒度

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金（42373007,42249911）;; 广东海洋大学科研启动经费资助项目（060302032101）

作者(Author): 许嘉莉,李飞龙,彭诗云,孔德明,徐利强

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