Sources of water vapor and their effects on water isotopes in precipitation in the Indian monsoon region: a model-based assessment.

ABSTRACT: Climate records of ratios of stable water isotopes of oxygen (δ¹⁸O) are used to reconstruct the past Indian monsoon precipitation. Identifying the sources of water vapor is important in understanding the role of monsoonal circulation in the δ¹⁸O values, to aid in monsoon reconstructions. Here, using an isotope-enabled Earth system model, we estimate the contributions of oceanic and terrestrial water vapor sources to two major precipitation seasons in India-the Southwest monsoon and the Northeast monsoon, and their effects on the δ¹⁸O in precipitation (δ¹⁸O_p). We find that the two monsoon seasons have different dominant sources of water vapor because of the reversal in atmospheric circulation. While Indian Ocean regions, Arabian Sea, an

SUBMITTER: Tharammal T 

PROVIDER: S-EPMC9839761 | biostudies-literature | 2023 Jan

REPOSITORIES: biostudies-literature