The lake sediments received wide attention for archiving paleoclimate and paleo sea-level variability during the late Quaternary period. It has also been extensively used to disentangle the interrelationships existing among the regional and the global climate systems. In the present study, the applicability of lake sediments has been the major impetus to delineate the mid-late Holocene climate and sea level variability using a ∼10 m sediment core retrieved from a protected freshwater lake-the Vellayani lake, southern Kerala, southwest India. The sediment core was investigated using multiproxy approach and was chronologically supported by AMS radiocarbon dates. The results show monsoon intensification and a high sea level during 6430−4390 cal yr BP led to the formation of a coastal lagoon system in the area. Climatically, a marginal reduction in monsoon during 4390−2600 cal yr BP interspersed by an intensified phase during 3800−2600 cal yr BP was observed while concurrently, a sea regression during4390−2600 cal yr BP restricted sea water influence in the study area. Proxies indicated a significant monsoon reduction during 2600−1000 cal yr BP followed by monsoon intensification post-1000 cal yr BP. After 2600 cal yr BP, a thick pile of alluvial sediments was deposited by the Karamana River which might have hindered the tidal influence and later the basin was transformed into a freshwater lake. The present lake configuration was attained after 440 cal yr BP. Further, comparison of paleoclimate reconstructed from the present study with the global records revealed a teleconnection of Indian monsoon with the global climate system.

湖泊沉积物在记录第四纪晚期古气候和古海平面变化方面受到广泛关注。它也被广泛用于解开区域和全球气候系统之间存在的相互关系。在本研究中，湖泊沉积物的适用性是使用从印度西南部喀拉拉邦南部维拉亚尼湖受保护的淡水湖 - Vellayani 湖中提取的约 10 m 沉积物核心来描绘中晚期全新世气候和海平面变化的主要推动力。 . 使用多代理方法对沉积物核心进行了调查，并由 AMS 放射性碳日期按时间顺序支持。结果表明，6430-4390 cal BP 期间的季风增强和高海平面导致该地区形成沿海泻湖系统。气候上，观察到 4390-2600 cal BP 期间季风略有减少，中间穿插着 3800-2600 cal BP 期间的加强阶段，同时，4390-2600 cal BP 期间的海退限制了研究区域的海水影响。代理表明，在 2600-1000 cal BP 期间季风显着减少，随后在 1000 cal BP 之后季风加强。2600 cal yr BP后，卡拉马纳河沉积了厚厚的冲积沉积物，这可能阻碍了潮汐的影响，后来该盆地转变为淡水湖。目前的湖泊构造是在 440 cal yr BP 之后获得的。此外，从本研究重建的古气候与全球记录的比较揭示了印度季风与全球气候系统的遥相关。