Lake Dali then and now (IMAGE) Columbia Climate School Caption Modern and highstand extent and catchment of Lake Dali. Inset shows extent of the East Asia monsoon and the location of Lake Dali and Lianhua, Hulu and Dongge caves. Climate records from the caves were used in the study. Credit Graphic: Y. Goldsmith et al., <i>PNAS</i> 2017 Usage Restrictions or reuse with attribution: Y. Goldsmith et al., <i>PNAS</i> 2017 License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.