Gupta et al. (2026) Role of monsoon intraseasonal oscillations in modulating extreme rainfall and aerosols over central India

⚠️ Warning: This summary was generated from the abstract only, as the full text was not available.

Identification

• Journal: Climate Dynamics
• Year: 2026
• Date: 2026-10-09
• Authors: Anu Gupta, Konduru Rakesh Teja, Jun Matsumoto, Masato I. Nodzu
• DOI: 10.1007/s00382-026-08287-w

Research Groups

• Indian Institute of Tropical Meteorology (IITM)
• National Centre for Medium Range Weather Forecasting (NCMRWF)

Short Summary

This study investigates the impact of monsoon intraseasonal oscillation (MISO) on aerosols and extreme rainfall events in Central India, revealing a negative correlation between aerosol optical depth and ERE frequency. The research also explores the effects of aerosols on atmospheric dynamics and cloud properties across MISO's eight phases.

Objective

• Investigate the influence of MISO on aerosols and extreme rainfall events (EREs) in Central India

Study Configuration

• Spatial Scale: Central India
• Temporal Scale: 2003 to 2019

Methodology and Data

• Models used: None mentioned, observational study using satellite datasets
• Data sources: CERES and GPM-IMERG satellite datasets

Main Results

• High AOD phases correspond to reduced ERE frequency (negative correlation)
• Low AOD phases see increased ERE occurrences
• Time lag of two phases in the variation between rainfall amount from all precipitation and rainfall amount brought by EREs
• Increased AOD during active MISO phases linked to altered atmospheric dynamics, affecting moisture convergence patterns

Contributions

• Original value of the article lies in its explicit examination of MISO's influence on aerosols and EREs, providing new insights into the complex relationships between aerosol loading, atmospheric dynamics, and precipitation patterns.

Funding

• This research was supported by the Ministry of Earth Sciences (MoES), Government of India.

Citation

@article{Gupta2026Role,
  author = {Gupta, Anu and Teja, Konduru Rakesh and Matsumoto, Jun and Nodzu, Masato I.},
  title = {Role of monsoon intraseasonal oscillations in modulating extreme rainfall and aerosols over central India},
  journal = {Climate Dynamics},
  year = {2026},
  doi = {10.1007/s00382-026-08287-w},
  url = {https://doi.org/10.1007/s00382-026-08287-w}
}