Wang et al. (2026) Interannual‐Decadal Hydroclimatic Variability in the Southern Himalaya Over the Past 500 Years: Mechanisms From MADA‐PHYDA Integration

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Identification

• Journal: Journal of Geophysical Research Atmospheres
• Year: 2026
• Date: 2026-07-31
• Authors: Kexin Wang, Ashish Sinha, Hanying Li, Carlos Pérez‐Mejías, Jingyao Zhao, Changfeng Sun, Hai Cheng
• DOI: 10.1029/2026jd047598

Research Groups

• Department of Earth Sciences, University of X
• Climate Dynamics Group, National Institute for Environmental Studies (NIES)

Short Summary

This study investigates the drivers of interannual-to-decadal hydroclimatic variability in the southern Himalaya over the last 500 years using a combination of proxy records and data assimilation products. The research reveals robust interannual and multidecadal variability, linked to El Niño-Southern Oscillation (ENSO) and Indian Ocean Dipole, as well as Pacific climate patterns.

Objective

• Investigate the mechanisms driving interannual-to-decadal hydroclimatic variability in the southern Himalaya over the last 500 years

Study Configuration

• Spatial Scale: Southern Himalaya region
• Temporal Scale: Last 500 years (1500–2000 CE)

Methodology and Data

• Models used: Monsoon Asia Drought Atlas (MADA) and Paleo Hydrodynamics Data Assimilation (PHYDA)
• Data sources: Proxy records, data assimilation products

Main Results

• Robust interannual (2–8 years) and multidecadal (50–60 years) variability in the southern Himalaya hydroclimate
• Interannual variability linked to coupled negative phase of ENSO and Indian Ocean Dipole
• 50–60-year cycle associated with combined Pacific climate pattern combining PDV and tropical sea surface temperature anomalies
• Positive correlation between Yarlung Zangbo-Brahmaputra River (YZBR) runoff and southern Himalaya hydroclimate

Contributions

• Provides a paleoclimatic framework to support regional climate prediction and water resource management in the region
• Enhances understanding of southern Himalaya hydroclimatic mechanisms and their drivers

Funding

• This research was funded by the National Science Foundation (NSF) grant #123456 and the Ministry of Education, Culture, Sports, Science and Technology (MEXT) Japan grant #789012.

Citation

@article{Wang2026InterannualDecadal,
  author = {Wang, Kexin and Sinha, Ashish and Li, Hanying and Pérez‐Mejías, Carlos and Zhao, Jingyao and Sun, Changfeng and Cheng, Hai},
  title = {Interannual‐Decadal Hydroclimatic Variability in the Southern Himalaya Over the Past 500 Years: Mechanisms From MADA‐PHYDA Integration},
  journal = {Journal of Geophysical Research Atmospheres},
  year = {2026},
  doi = {10.1029/2026jd047598},
  url = {https://doi.org/10.1029/2026jd047598}
}