Biography

Masashi Kohma is a research associate at Department of Earth and Planetary Science, Graduate School of Science, The University of Tokyo. His research interests include middle atmosphere dynamics, turbulence in the atmosphere, clouds observed in the middle atmosphere, and tropopause.

Interests

  • Middle atmosphere dynamics
  • Turbulence in the atmosphere
  • Polar stratopheric clouds (PSCs)
  • Polar mesospheric clouds (PMCs)
  • Tropopause

Education

  • PhD in Earth and Planetary Science,
    The University of Tokyo
    March, 2014

  • MS in Earth and Planetary Science,
    The University of Tokyo
    March, 2011

  • BS in Geophysics,
    Kyoto University
    March, 2009

Publications

(peer-reviewed)

Tokimori, E., Kohma, M., and Sato, K. (2025), A statistical study of gravity waves in the troposphere and lower stratosphere in the Antarctic based on the PANSY radar observations, J. Meteor. Soc. Japan, 103, EOR. doi:10.2151/jmsj.2025-006

DOI

Yoshida, L., Tomikawa, Y., Ejiri, M. K., Kohma, M., and Sato, K. (2024), Large-Amplitude Inertia Gravity Waves Over Syowa Station: Comparison of PANSY Radar and ERA5 Reanalysis Data, J. Geophys. Res.-Atmos., 129, e2023JD040490. doi:10.1029/2023JD040490

DOI

Tomikawa, Y., Murata, I., Kohma, M., and Sato, K. (2024), Simultaneous Observation of Near-Inertial Frequency Gravity Waves by a Long-Duration Balloon and the PANSY Radar in the Antarctic, J. Meteorol. Soc. Japan, doi:10.2151/jmsj.2024-034

DOI

Kohma, M., K. Sato, D. C. Fritts, and T. S. Lund (2024), Numerical Simulation of Orographic Gravity Waves Observed Over Syowa Station: Wave Propagation and Breaking in the Troposphere and Lower Stratosphere, J. Geophys. Res.-Atmos., 129, e2023JD039425. doi:10.1029/2023JD039425

DOI

Sato, K., Tomikawa, Y., Kohma, M., Yasui, R., Koshin, D., Okui, H., Watanabe, S., Miyazaki, K., Tsutsumi, M., Murphy, D., Meek, C., Tian, Y., Ern, M., Baumgarten, G., Chau, J. L., Chu, X., Collins, R., Espy, P. J., Hashiguchi, H., Kavanagh, A. J., Latteck, R., Luebken, F.-J., Milla, M., Nozawa, S., Ogawa, Y., Shiokawa, K., Alexander, M. J., and Nakamura, T. (2023), Interhemispheric Coupling Study by Observations and Modelling (ICSOM): Concept, Campaigns, and Initial Results, J. Geophys. Res.-Atmos., 128, e2022JD038249. doi:10.1029/2022JD038249

DOI

See all publications

Presentations

(International conferences only)

Kohma, M., Sato, K., Fritts, D. C., and Lund, T. S., Numerical simulation of orographic gravity waves observed over Syowa Station in the Antarctic.
Internaltional Symposium on the 40th Anniversary of the MU radar, Uji Campus, Kyoto University, Kyoto, Japan, Nov 18, 2024 — Nov 21, 2024 [Nov 20], Poster
M. Kohma, Estimate of Turbulent Energy Dissipation Rate from the VHF Radar And Radiosonde Observations in the Antarctic.
FISAPS Workshop on Research Using High Vertical-Resolution Radiosonde Data, UCAR Foothills Campus, US, Aug 30, 2023 — Sep 1, 2023 [Aug 30], Oral (INVITED)
Kohma, M., Sato, K., Fritts, D. C., and Lund, T. S., Numerical simulation of orographic gravity waves observed over Syowa Station.
Japan Geoscience Union Meeting 2023, Chiba, May 21, 2023 — May 26, 2023 [May 21], Oral (INVITED)
Kohma, M., K. Sato, K. Nishimura, and M. Tsutsumi, Estimation of turbulent energy dissipation rates by a VHF radar in the Antarctic.
SPARC 2022 General Assembly, in three locations and online, Oct 24, 2022 — Oct 28, 2022 [Oct 24], Poster
Kohma, M., and K. Sato, Turbulent Kinetic Energy Dissipation Rates Around the Polar Vortex in the UTLS Region in the Antarctic.
AOGS 19th Annual Meeting, Virtual, Aug 1, 2022 — Aug 6, 2022 [Aug 03], Poster
See all talks

Experience

 
 
 
 
 

Department of Earth and Planetary Science, The University of Tokyo

Research Associate

Apr 2014 – Present Tokyo, Japan

Teaching:

  • Undergraduate, Exercises in Earth and Planetary Physics (Matrix calculation using Fortran), FY2014-2015
  • Undergraduate, Field Observation for Earth and Planetary Physics, FY2014-2015, FY2017-2022
  • Undergraduate, Exercises in Basic Earth and Planetary Physics III (Fluid dynamics), FY2017-
  • Undergraduate, Exercises in Basic Earth and Planetary Physics II (Complex function), FY2020
 
 
 
 
 

The 57th Japanese Antarctic Research Expedition (JARE57)

Wintering Member

Nov 2015 – Mar 2017 Syowa Station, Antarctic
 
 
 
 
 

Japan Society for the Promotion of Science (JSPS)

Research Fellowship (DC1)

Apr 2011 – Mar 2014

Awards and Honors

Meteorological Society of Japan Aug 2016

Yamamoto Prize 2016

Stratosphere-troposphere Processes And their Role in Climate (SPARC) Jan 2014

Best Poster Prize in SPARC General Assembly 2014

Projects

Program of the Antarctic Syowa MST/IS Radar (PANSY radar)

The PANSY radar is the first Mesosphere-Stratosphere-Troposphere/Incoherent Scatter (MST/IS) radar in the Antarctic region

Tag cloud

Antarctic BDC Data Assimilation Gravity waves PANSY PMSE PMWE PSC satellites SSW Tropopause turbulence

Contact