Asian Monsoon Climate Stabilities and its Onset Processes: Dynamics and AsiaPEX Field Campaigns

Authors

  • Laitpharlang Cajee North Eastern Hill University, Shillong, India Author
  • Jun Matsumoto Yokohama National University, Yokohama, Japan. Tokyo Metropolitan University, Tokyo, Japan Author
  • Taiichi Hayashi Kyoto University, Uji, Kyoto 611-0011, Japan Author
  • Fatima Akter University of Dhaka, Dhaka, Bangladesh Author
  • A. T. M. Shakhawat Hossain Jahangirnagar University, Dhaka, Bangladesh Author
  • Sayeed Ahmed Choudhury Kagawa University, Saiwai Cho, Takamatsu City, Kagawa, Japan Author
  • Subrat Kumar Panda Central University of Rajasthan, Ajmel, India Author
  • Rahul Mahanta Cotton University, Guwahati, India Author
  • Subashisa Dutta Indian Institute of Technology Guwahati, Guwahati, India Author
  • Prasanta Bhattacharya Gauhati University, Guwahati, India Author
  • Toru Terao Kagawa University, Saiwai Cho, Takamatsu City, Kagawa, Japan Author
  • Hiambok Jones Syiemlieh North Eastern Hill University, Shillong, India Author
  • Masahiro Tanoue Meteorological Research Institute, Tsukuba, Japan Author
  • Hideyuki Kamimera National Research Institute for Earth Science and Disaster Resilience, Tsukuba, Japan Author
  • Yusuke Yamane Tokoha University, Shizukoka, Japan Author
  • Azusa Fukushima Kobe Gakuin University, Kobe, Japan Author
  • Fumie Murata Kochi University, Kochi, Japan Author
  • Masashi Kiguchi The University of Tokyo, Tokyo, Japan Author
  • Hatsuki Fujinami The University of Tokyo, Tokyo, Japan Author
  • Shinjiro Kanae Institute of Science Tokyo, Tokyo, Japan Author

DOI:

https://doi.org/10.64862/ajeg.2025.2sp.55.170

Keywords:

Asian monsoon, Onset, Heating process

Abstract

We identified the process of Asian monsoon onset using new diagnostic method based on the mass amount of high moist and dry static energy airmass. In 2017, Asian monsoon onset process is driven by convective heating over the sector of Bay of Bengal and Bengal Plain. Estimation of convective heating has large uncertainty in ERA5 reanalysis dataset. We discuss the stability of Asian monsoon circulation and uncertainties in state-of-the-art analysis. We propose to develop new observational platform under the AsiaPEX project under the GEWEX climate research framework.

References

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https://doi.org/10.1002/qj.388

Stiller-Reeve, M. A., Allen, T., Siddiquee, N. A., and Moniruzzaman, M. (2015). Complementing scientific monsoon definitions with social perception in Bangladesh. Bulletin of the American Meteorological Society, 96(1), 49–57. https://doi.org/10.1175/BAMS-D-13-00144.1

Matsumoto, J. (1997). Seasonal transition of summer rainy season over Indochina and adjacent monsoon region. Advances in Atmospheric Sciences, 14(2), 231–245. https://doi.org/10.1007/s00376-997-0022-0

Terao, T., Kanae, S., Fujinami, H., Das, S., Dimri, A. P., Dutta, S., Fujita, K., Fukushima, A., Ha, K. J., Hirose, M., Hong, J., Kamimera, H., Kayastha, R. B., Kiguchi, M., Kikuchi, K., Kim, H. M., Kitoh, A., Kubota, H., Ma, W., Ma, Y., Matsumoto, J. (2023). AsiaPEX: Challenges and prospects in Asian precipitation research. Bulletin of the American Meteorological Society, 104(4), E884–E908. https://doi.org/10.1175/BAMS-D-20-0220.1

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Published

2025-11-27

Data Availability Statement

We used only ECMWF ERA5 dataset. Data are avaiable from their website.

How to Cite

Asian Monsoon Climate Stabilities and its Onset Processes: Dynamics and AsiaPEX Field Campaigns. (2025). Asian Journal of Engineering Geology, 2(Sp Issue), 119-120. https://doi.org/10.64862/ajeg.2025.2sp.55.170

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