1th June 2019
Sayak Basu et al. 2019 PLoS ONE paper Highlights
- δ13Cn-alkane values after 2500 cal yr BP, which suggests proliferation of C4 grasses in this region.
- A significant increase in the δD values of paleoprecipitation (ca. 25 ‰) indicates a weakened ISM precipitation after ca. 2500 cal yr BP.
- The regional aridification and frequent fire events may have helped the expansion of C4 plant dominated grassland ecosystem in Banni region.
- Correlation between paleoclimatic records suggests that the southward migration of intertropical convergence zone and more frequent warm phases of El-Nino Southern Oscillation have triggered the weakening of monsoonal precipitation in the tropical region.