气候环境变化的河流响应

通过综述前人及笔者的已有研究工作，指出气候环境变化可能引发各种河流地貌过程，如河流的侵蚀与加积、河口的溯源侵蚀与溯源堆积等；流域气候环境变化在河口沉积物的矿物和元素组成上也得以反映，如SX97孔中的粘土矿物和石英的含量变化教育与该孔孢粉资料所揭示的气候环境演化规律相吻合，也与早期对华南海岸沙丘和海滩岩的研究所揭示的区域气候环境演化一致，但由于局部因素的干扰，气候环境变化的河流响应体系可能变得较为复杂，在研究工作中应对此予以足够注意。

River Response to Climatic and Environmental Change

Based on the summary of other researchers' achievements and analysis by the authors to the sediments since 7 000 a BP from core SX97 on the northeast of Pearl River mouth, it is found that climatic and environmental changes may probably lead to various fluvial processes, such as incision and accumulation in the valley,and the upstream incision and accumulation at the river mouth. Climatic and environmental changes may also leave footprints in the mineralogy and elements in the fluvial sediments. For example, both total clay mineral and quartz from core SX97 vary correspondingly with the climatic and environmental evolution revealed by pollen data of this core, and all these proxies correlate well with the local climatic and environmental evolution suggested by previous work on coastal dune and beachrock of South China.