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 Aerosols And Clouds: People
Hanii  Takahashi's Picture
Jet Propulsion Laboratory
M/S 233-300
4800 Oak Grove Drive
Pasadena, CA 91109
Curriculum Vitae:

Hanii Takahashi

  • Ph.D. Earth and Environmental Science, City University of New York, The Graduate Center (2013)
  • M.S. Mathematics, New York University, Courant Institute (2009)
  • B.S. Mathematics, Purdue University, Indianapolis Campus (2007)
  • B.S. Physics, Chuo University, Japan (2004)

Research Interests
  • Convective dynamics in tropical deep convective clouds, including overshooting convection/hot tower
  • Evaluating warm rain formation processes in GCMs and CRMs
  • Developing model diagnostic tools that uniquely capture important processes pertaining to convective dynamics, convective evolution, and cloud microphysics
  • Satellite remote sensing and process studies of clouds
  • Multiple satellite data collocation and analysis (e.g., A-Train together with ISCCP CT)


JIFRESSE is a scientific collaboration between UCLA and JPL to improve understanding and to develop future projections about global climate change.

CloudSat Icon CloudSat
CloudSat is an experimental satellite that uses radar to study clouds and precipitation from space. CloudSat flys in orbital formation as part of the A-Train constellation of satellites (Aqua, CloudSat, CALIPSO, PARASOL, and Aura).

Professional Experience
  • JIFRESSE Assistant Researcher: Jet Propulsion Laboratory, University of California, Los Angeles (2016-present)
  • Postdoctoral Scholar: Jet Propulsion Laboratory, California Institute of Technology (2013-2016)
  • Graduate Research Assistant: City College of New York (2009-2013)
  • Teaching Assistant: City College of New York (2010-2013)
  • Summer Intern: Jet Propulsion Laboratory, California Institute of Technology (summer 2012)
  • UN Intern: United Nations Headquarters, DESA, Population Estimates and Projection Section (Fall 2008)

Selected Awards
  • JPL 2015 Postdoc Day Best Poster, Earth Science (2015)

Selected Publications
  1. Stephens, G.L., Christensen, M., Andrews, T., Haywood, J., Malavelle, F.F., Suzuki, K., Jing, X., Lebsock, M., Li, J.L.F., Takahashi, H. and Sy, O (2019), Cloud Physics from Space. Quarterly Journal of the Royal Meteorological Society,1-22.
  2. Takahashi, H., M., Lebsock, K., M., Richardson., R., Marchand., J Kay (2019), When Will Spaceborne Cloud Rader Detect Upward Shifts in Cloud Heights? Journal of Geophysical Research: Atmospheres, 124.
  3. Kahn, B. H., Takahashi, H., Stephens, G. L., Yue, Q., Delanoë, J., Manipon, G., ... & Heymsfield, A. J. (2018). Ice cloud microphysical trends observed by the Atmospheric Infrared Sounder. Atmospheric Chemistry and Physics, 18(14), 10715-10739.
  4. Takahashi, H., M., Lebsock, K., Suzuki, G., Stephens, and M., Wang (2017), An Investigation of Microphysics and Sub-grid Scale Variability in Warm Rain Clouds using The A-Train Observations and A Multi-Scale Modeling Framework, J. Geophys. Res. Atmos., 122, Doi:10.1002/2016JD026404
  5. Luo, Z. J., Anderson, R. C., Rossow, W. B., & Takahashi, H. (2017). Tropical Cloud and Precipitation Regimes As Seen from Near-Simultaneous TRMM, CloudSat, and CALIPSO Observations and Comparison with ISCCP. Journal of Geophysical Research: Atmospheres, 122(11), 5988-6003. DOI: 10.1002/2017JD026569
  6. Malavelle, F., Haywood, J., Jones, A., Gettelman, A., Clarisse, L., Bauduin, S., Allan, R., Karset, I., Kristjánsson, J., Oreopoulos, L., Cho, N., Lee, D., Bellouin, N., Boucher, O., Grosvenor, D., Carslaw, K., Dhomse, S., Mann, G., Schmidt, A., Coe, H., Hartley, M., Dalvi, M., Hill, A., Johnson, B., Johnson, C., Knight, J., O'Connor, F., Partridge, D., Stier, P., Myhre, G., Platnick, S., Stephens, G.,Takahashi, H., & Thordarson, T. (2017). Strong constraints on aerosol-cloud interactions from volcanic eruptions. Nature, 546, 485-491, DOI: 10.1038/nature22974
  7. Takahashi, H., Suzuki, K., & Stephens, G. (2017). Land-ocean differences in the warm-rain formation process in satellite and ground-based observations and model simulations. Quarterly Journal of the Royal Meteorological Society, 143(705), 1804-1815. DOI:10.1002/qj.3042
  8. Takahashi, H., Luo, Z. J., & Stephens, G. L. (2017). Level of neutral buoyancy, deep convective outflow, and convective core: New perspectives based on 5 years of CloudSat data. Journal of Geophysical Research: Atmospheres, 122(5), 2958-2969. DOI:10.1002/2016JD025969.
  9. Takahashi, H., Su, H., & Jiang, J. H. (2016). Water vapor changes under global warming and the linkage to present-day interannual variabilities in CMIP5 models. Climate Dynamics, 47(12), 3673-3691. DOI: 10.1007/s00382-016-3035-5.
  10. Takahashi, H., Su, H., & Jiang, J. H. (2016). Error analysis of upper tropospheric water vapor in CMIP5 models using "A-Train" satellite observations and reanalysis data. Climate Dynamics, 46(9-10), 2787-2803. DOI: 10.1007/s00382-015-2732-9.
  11. Takahashi, H., & Luo, Z. J. (2014). Characterizing tropical overshooting deep convection from joint analysis of CloudSat and geostationary satellite observations. Journal of Geophysical Research: Atmospheres, 119(1), 112-121. DOI:10.1002/2013JD020972.
  12. Luo, Z. J., Jeyaratnam, J., Iwasaki, S., Takahashi, H., & Anderson, R. (2014). Convective vertical velocity and cloud internal vertical structure: An A-Train perspective. Geophysical Research Letters, 41(2), 723-729. DOI:10.1002/2013GL058922.
  13. Takahashi, H., Su, H., Jiang, J. H., Luo, Z. J., Xie, S. P., & Hafner, J. (2013). Tropical water vapor variations during the 2006-2007 and 2009-2010 El Niños: satellite observation and GFDL AM2. 1 simulation. Journal of Geophysical Research: Atmospheres, 118(16), 8910-8920. DOI:10.1002/jgrd.50684.
  14. Takahashi, H., & Luo, Z. (2012). Where is the level of neutral buoyancy for deep convection?. Geophysical Research Letters, 39(15). DOI:10.1029/2012GL052638.

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