AbstractThe impact of moisture transport and sources on precipitation stable isotopes (δ18O and d‐excess) in the central Himalayas are crucial to understanding the climatic archives. However, this is still unclear due to the lack of in‐situ observations. Here we present measurements of stable isotopes in precipitation at two stations (Yadong and Pali) in the central Himalayas during 2014–2015. Combined with simulations from the dispersion model FLEXPART, we investigate effects on precipitation stable isotopes related to changes in moisture sources and convections in the region, and possible influence by El Niño. Our results suggest that the moisture supplies related to evaporation over northeastern India and moisture losses related to convective activities over the Bay of Bengal (BoB) and Bangladesh region play important roles in changes in δ18O and d‐excess in precipitation in the Yadong Valley. Outgoing longwave radiation and moisture flux divergence analysis further confirm that the contribution from continental evaporation dominates the moisture supply in the central Himalayas with a lesser contribution from convection over the BoB during the 2015 monsoon season compared with 2014. A change in the altitude effect is observed in 2015, which is more significant than the temperature and precipitation amount effect during the observation period. These findings provide valuable insights into climatic interpretations of paleo‐isotopic archives with an isotopic response to changes in moisture transport to the central Himalayas.

More from our Archive

• DOI: 10.1093/mnras/stad1984 2023

  Analysing the large-scale bulk flow using cosmicflows4: increasing tension with the standard cosmological model

  Richard Watkins, Trey Allen, Collin James Bradford, Albert Ramon, Alexandra Walker, Hume A Feldman, Rachel Cionitti, Yara Al-Shorman, Ehsan Kourkchi, R Brent Tully

• DOI: 10.1093/mnras/stad2032 2023

  <i>JWST</i> early Universe observations and ΛCDM cosmology

  Rajendra P Gupta

• DOI: 10.1093/mnras/stad2046 2023

  Feedback reshapes the baryon distribution within haloes, in halo outskirts, and beyond: the closure radius from dwarfs to massive clusters

  Mohammadreza Ayromlou, Dylan Nelson, Annalisa Pillepich

• DOI: 10.1029/2022je007612 2023

  Mineralogy, Morphology, and Emplacement History of the Maaz Formation on the Jezero Crater Floor From Orbital and Rover Observations

  Briony Horgan, Arya Udry, Melissa Rice, Sanna Alwmark, Hans E. F. Amundsen, James F. Bell, Larry Crumpler, Brad Garczynski, Jeff Johnson, Kjartan Kinch, Lucia Mandon, Marco Merusi, Chase Million, Jorge I. Núñez, Patrick Russell, Justin I. Simon, Michael St. Clair, Kathryn M. Stack, Alicia Vaughan, Brittan Wogsland, Andrew Annex, Andreas Bechtold, Tor Berger, Olivier Beyssac, Adrian Brown, Ed Cloutis, Barbara A. Cohen, Sarah Fagents, Linda Kah, Ken Farley, David Flannery, Sanjeev Gupta, Svein‐Erik Hamran, Yang Liu, Gerhard Paar, Cathy Quantin‐Nataf, Nicolas Randazzo, Eleni Ravanis, Steven Sholes, David Shuster, Vivian Sun, Christian Tate, Nick Tosca, Meenakshi Wadhwa, Roger C. Wiens

• DOI: 10.1093/mnras/stad2013 2023

  The Dark Energy Survey Year 3 and eBOSS: constraining galaxy intrinsic alignments across luminosity and colour space

  S Samuroff, R Mandelbaum, J Blazek, A Campos, N MacCrann, G Zacharegkas, A Amon, J Prat, S Singh, J Elvin-Poole, A J Ross, A Alarcon, E Baxter, K Bechtol, M R Becker, G M Bernstein, A Carnero Rosell, M Carrasco Kind, R Cawthon, C Chang, R Chen, A Choi, M Crocce, C Davis, J DeRose, S Dodelson, C Doux, A Drlica-Wagner, K Eckert, S Everett, A Ferté, M Gatti, G Giannini, D Gruen, R A Gruendl, I Harrison, K Herner, E M Huff, M Jarvis, N Kuropatkin, P-F Leget, P Lemos, J McCullough, J Myles, A Navarro-Alsina, S Pandey, A Porredon, M Raveri, M Rodriguez-Monroy, R P Rollins, A Roodman, G Rossi, E S Rykoff, C Sánchez, L F Secco, I Sevilla-Noarbe, E Sheldon, T Shin, M A Troxel, I Tutusaus, N Weaverdyck, B Yanny, B Yin, Y Zhang, J Zuntz, M Aguena, O Alves, J Annis, D Bacon, E Bertin, S Bocquet, D Brooks, D L Burke, J Carretero, M Costanzi, L N da Costa, M E S Pereira, J De Vicente, S Desai, H T Diehl, J P Dietrich, P Doel, I Ferrero, B Flaugher, J Frieman, J García-Bellido, S R Hinton, D L Hollowood, K Honscheid, D J James, K Kuehn, O Lahav, J L Marshall, P Melchior, J Mena-Fernández, F Menanteau, R Miquel, J Newman, A Palmese, A Pieres, A A Plazas Malagón, E Sanchez, V Scarpine, M Smith, E Suchyta, M E C Swanson, G Tarle, C To,

• DOI: 10.3390/life13071472 2023

  Exploring the Frontiers of Neuroimaging: A Review of Recent Advances in Understanding Brain Functioning and Disorders

  Chiahui Yen, Chia-Li Lin, Ming-Chang Chiang

• DOI: 10.1093/mnras/stad2101 2023

  Jellyfish galaxies with the IllustrisTNG simulations – when, where, and for how long does ram pressure stripping of cold gas occur?

  Eric Rohr, Annalisa Pillepich, Dylan Nelson, Elad Zinger, Gandhali D Joshi, Mohammadreza Ayromlou

• DOI: 10.1093/mnras/stad2087 2023

  MUSE Analysis of Gas around Galaxies (MAGG) – V. Linking ionized gas traced by C <scp>iv</scp> and Si <scp>iv</scp> absorbers to Ly α emitting galaxies at <i>z</i> ≈ 3.0–4.5

  Marta Galbiati, Michele Fumagalli, Matteo Fossati, Emma K Lofthouse, Rajeshwari Dutta, J Xavier Prochaska, Michael T Murphy, Sebastiano Cantalupo

• DOI: 10.1093/mnras/stad2001 2023

  Identifying the SN 2022acko progenitor with <i>JWST</i>

  Schuyler D Van Dyk, K Azalee Bostroem, WeiKang Zheng, Thomas G Brink, Ori D Fox, Jennifer E Andrews, Alexei V Filippenko, Yize Dong, Emily Hoang, Griffin Hosseinzadeh, Daryl Janzen, Jacob E Jencson, Michael J Lundquist, Nicolas Meza, Dan Milisavljevic, Jeniveve Pearson, David J Sand, Manisha Shrestha, Stefano Valenti, D Andrew Howell

• DOI: 10.1093/mnras/stad2031 2023

  The halo mass function and filaments in full cosmological simulations with fuzzy dark matter

  Simon May, Volker Springel