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Hanii Takahashi

Photo of Hanii Takahashi

Address:

4800 Oak Grove Drive
M/S 233-300

Pasadena, CA 91109

Phone:

818.393.7414

Fax:

818.393.5065

Curriculum Vitae:

Click here

Member of:

Aerosols And Clouds

Education

  • 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)

Professional Experience

  • Research Scientist, Jet Propulsion Laboratory, Pasadena (2022-present)
    • A-Train, CloudSat
    • NASA AOS
    • INCUS
  • 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)

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)

Selected Awards

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

Selected Publications

  1. Takahashi, H., Luo, Z. J., Masunaga, H., Storer, R., & Noda, A. T. (2024). Investigating convective processes underlying ENSO: New insights into the fixed anvil temperature hypothesis. Geophysical Research Letters, 51, https://doi.org/10.1029/2023GL107113
  2. Takahashi, H., C. M. Naud, D. J. Posselt, and G. A. Duffy (2024). Systematic Differences between the Northern and Southern Hemispheres: Warm-Frontal Ice Water Path Linked to the Origin of Extratropical Cyclones. J. Climate, 37, 2491–2504, https://doi.org/10.1175/JCLI-D-23-0391.1.
  3. Masunaga, H., & Takahashi, H. (2024). The Energetics of the Lagrangian Evolution of Tropical Convective Systems. J. Atmos. Sci. https://doi.org/10.1175/JAS-D-23-0141.1
  4. Takahashi, H., Z. J. Luo, G. L. Stephens, and J. Mulholland (2023). Revisiting the Land-Ocean Contrasts in Deep Convective Cloud Intensity Using Global Satellite Observations, Geophys. Res. Letts. https://doi.org/10.1029/2022GL102089
  5. Li, J., Cesana, G. V., Xu, K. M., Richardson, M., Takahashi, H., & Jiang, J. H. (2023). Comparisons of Simulated Radiation, Surface Wind Stress and SST Fields over Tropical Pacific by the GISS CMIP6 Versions of Global Climate Models with Observations. Environmental Research Communications. https://iopscience.iop.org/article/10.1088/2515-7620/aca9ab
  6. Luo, Zhengzhao & Tselioudis, George & Rossow, William. (2022). Studies of Cloud, Convection and Precipitation Processes Using Satellite Observations. Lectures in Climate Change. Volume 3. https://doi.org/10.1142/12862
  7. Lebsock, M., Takahashi, H., Roy, R., Kurowski, M. J., & Oreopoulos, L. (2022). Understanding Errors in Cloud Liquid Water Path Retrievals Derived from CloudSat Path-Integrated Attenuation. Journal of Applied Meteorology and Climatology, 61(8), 955-967. https://doi.org/10.1175/JAMC-D-21-0235.1
  8. Takahashi, H., Bodas-Salcedo, A., & Stephens, G. (2021). Warm Cloud Evolution, Precipitation, and Their Weak Linkage in HadGEM3: New Process-Level Diagnostics using A-Train Observations. Journal of the Atmospheric Sciences, https://journals.ametsoc.org/view/journals/atsc/78/7/JAS-D-20-0321.1.xml
  9. Takahashi, H., M. Lebsock, Z. J. Luo, H. Masunaga, and C. Wang (2021), Detection and tracking of tropical convective storms based on globally gridded precipitation measurements: Algorithm and low latitude survey, J. Appl. Meteor. Climatol, https://doi.org/10.1175/JAMC-D-20-0171.1
  10. Takahashi, H., Z. J. Luo, and G. L. Stephens (2021), Revisiting the entrainment relationship of convective plumes: A perspective from global observations, Geophys. Res. Lett., https://doi.org/10.1029/2020GL092349
  11. 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. https://doi.org/10.1002/qj.3589
  12. 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. https://doi.org/10.1029/2018JD030242
  13. 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. https://doi.org/10.5194/acp-18-10715-2018
  14. 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. https://doi.org/10.1002/2016JD026404
  15. 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. https://doi.org/10.1002/2017JD026569
  16. 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, https://doi.org/10.1038/nature22974
  17. 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. https://doi.org/10.1002/qj.3042
  18. 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. https://doi.org/10.1002/2016JD025969
  19. 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. https://doi.org/10.1007/s00382-016-3035-5
  20. 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. https://doi.org/10.1007/s00382-015-2732-9
  21. 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. https://doi.org/10.1002/2013JD020972
  22. 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. https://doi.org/10.1002/2013GL058922
  23. 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. https://doi.org/10.1002/jgrd.50684
  24. Takahashi, H., & Luo, Z. (2012). Where is the level of neutral buoyancy for deep convection?. Geophysical Research Letters, 39(15). https://doi.org/10.1029/2012GL052638

Projects

CloudSat
JIFRESSE