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Linkage between precipitation isotopes and biosphere-atmosphere interaction observed in northeast India

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Title
Linkage between precipitation isotopes and biosphere-atmosphere interaction observed in northeast India
Author(s)
Chakraborty, Supriyo; Burman, Pramit Kumar Deb; Sarma, Dipankar; Nitesh Sinha; Datye, Amey; Metya, Abirlal; Murkute, Charuta; Saha, Subodh K.; Sujith, Krishnakumar; Gogoi, Nirmali; Bora, Abhijit; Maji, Sabyasachi; Parua, Dipak K.; Bera, S.
Publication Date
2022-02
Journal
npj Climate and Atmospheric Science, v.5, no.1
Publisher
Nature Research
Abstract
© 2022, The Author(s).The intra-seasonal variation in precipitation isotopes shows a characteristic declining trend over northeast India. As of now, no mechanism offers a consistent explanation of this trend. We have performed the isotopic analysis of precipitation (rain) and estimated net ecosystem exchange and latent heat fluxes using an eddy-covariance system in northeast India. Additionally, we have used a diagnostic model to determine the recycled rainfall in this region. We find a strong link between the enhanced ecosystem productivity and isotopic enrichment in rainwater during the premonsoon season. Subsequently, on the advent of monsoon, the Bay of Bengal generated moisture enters this region and depletes the isotopic values. Additionally, the regional-scale convective activities produce periodic lows in the precipitation isotopes. Contrary to the general understanding, our study shows that the internal factors, such as the local land-atmosphere interactions, rather than the external influences, play a significant role in governing the precipitation isotopes in northeast India.
URI
https://pr.ibs.re.kr/handle/8788114/11596
DOI
10.1038/s41612-022-00231-z
ISSN
2397-3722
Appears in Collections:
Center for Climate Physics(기후물리 연구단) > 1. Journal Papers (저널논문)
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