Takaya et al. (2025) Influence of Soil Moisture on Surface Air Temperature in Monsoons

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

Identification

• Journal: Geophysical Research Letters
• Year: 2025
• Date: 2025-10-16
• Authors: Yuhei Takaya, Naresh Ganeshi, Yu Kosaka, Xinfeng Liang, Tomonori Sato
• DOI: 10.1029/2025gl115760

Research Groups

[Information not available in the abstract.]

Short Summary

This study quantifies the influence of soil moisture on surface air temperature across monsoon regions using information-theoretic causal analysis, revealing a significant, seasonally linked influence, even in wet tropical conditions, and a strong connection between land desiccation and pre-monsoon hot days.

Objective

• To quantify the strength of soil moisture (SM) influence on surface air temperature (SAT) across monsoon regions using information-theoretic causal analysis.
• To understand how SM influence on SAT is linked to the seasonal monsoon cycle and its role in pre-monsoon hot days.

Study Configuration

• Spatial Scale: Monsoon regions (global/continental scale).
• Temporal Scale: Seasonal monsoon cycle, pre-monsoon periods (implying multi-year analysis to capture seasonal dynamics).

Methodology and Data

• Models used: Information-theoretic causal analysis, specifically the Liang-Kleeman information flow.
• Data sources: [Information not available in the abstract.]

Main Results

• Soil moisture (SM) exerts significant influence on surface air temperature (SAT) across monsoon regions.
• This influence is intricately linked to the seasonal monsoon cycle.
• Prominent influence of SM on SAT was found even under typical wet conditions in the tropics when intense solar radiation is present.
• A strong connection exists between land desiccation and the occurrence of hot days in pre-monsoon periods.

Contributions

• Introduces and applies the information-theoretic causal analysis (Liang-Kleeman information flow) to quantify the strength of SM influence on SAT.
• Enhances understanding of land-atmosphere interactions by revealing the significant, seasonally evolving influence of SM on SAT across monsoon regions.
• Provides new insights into seasonally evolving predictability arising from SM variability across monsoon systems.
• Highlights the role of SM in modulating SAT even in wet tropical conditions and its strong connection to pre-monsoon hot days.

Funding

[Information not available in the abstract.]

Citation

@article{Takaya2025Influence,
  author = {Takaya, Yuhei and Ganeshi, Naresh and Kosaka, Yu and Liang, Xinfeng and Sato, Tomonori},
  title = {Influence of Soil Moisture on Surface Air Temperature in Monsoons},
  journal = {Geophysical Research Letters},
  year = {2025},
  doi = {10.1029/2025gl115760},
  url = {https://doi.org/10.1029/2025gl115760}
}