Climate history finds monsoon fluctuation footprints from sediment transport to farming adaptations

A recent study conducted by scientists from the Birbal Sahni Institute of Palaeosciences (BSIP), an autonomous institute under the Department of Science and Technology (DST), has reconstructed 4,600 years of climate and environmental history in the Central Ganga Plain. Utilizing proxies from Karela Lake near Lucknow, researchers analyzed stable isotopes, vegetation changes, and sedimentary records. The study revealed that Indian Summer Monsoon fluctuations historically regulated lake hydrology, sediment transport, vegetation shifts, microbial activity, and early farming adaptations. The research identified four major environmental phases corresponding to key climatic events, including the 4.2 ka arid event, the Roman Warm Period, and the Little Ice Age, offering insights into human-climate interactions and agricultural evolution.