Naftali Cohen Postdoctoral Associate The department of Geology & Geophysics, Yale University 210 Whitney Ave., New Haven CT 06511 naftali.cohen@yale.edu 1-917-273-7881 Research Interests Geophysical fluid dynamics, stratospheric dynamics, waves and mean flow interaction, general circulation of the atmosphere, tropical and monsoon dynamics, moist baroclinic instability Educational Background • • • Ph.D. in Mathematics and Atmosphere-Ocean Sciences, The Center for Atmosphere Ocean Science, Courant Institute of Mathematical Sciences, New York University, 2014 Thesis: What drives the Brewer-Dobson Circulation? Wave mean-flow theories, interactions between resolved and unresolved waves, and the limits of downward control Advisors: Edwin P. Gerber and Oliver Bühler Dissertation Committee: Olivier Pauluis, Tiffany Shaw, and Joan Alexander M.Sc. in Atmospheric Science, Earth Science Institute, The Hebrew University, Israel, 2008 Thesis: Possible aerosol effects on lightning activity and structure of hurricanes Advisor: Alexander Khain Dissertation Committee: Daniel Rosenfeld and Nathan Paldor B.Sc. in Atmospheric Science and Chemistry, The Hebrew University, Israel, 2006 Publications • N. Y. Cohen and W. R. Boos, 2015: Modulation of subtropical stratospheric waves by equatorial rainfall, submitted to Geophysical Research Letters • N. Y. Cohen and W. R. Boos, 2015: Perspectives on moist baroclinic instability: implications for the growth of monsoon depressions, Journal of the Atmospheric sciences—in revisions • N. Y. Cohen and W. R. Boos, 2014: Has the number of Indian summer monsoon depressions decreased over the last thirty years?, Geophysical Research Letters • N. Y. Cohen, E. P. Gerber and O. Bühler, 2014: What drives the Brewer-Dobson circulation?, Journal of the Atmospheric sciences • • • • • • • N. Y. Cohen, 2014: What drives the Brewer-Dobson Circulation? Wave mean-flow theories, interactions between resolved and unresolved waves, and the limits of downward control. PhD thesis. N. Y. Cohen, E. P. Gerber and O. Bühler, 2013: Compensation between Resolved and Unresolved Wave Driving in the Stratosphere: Implications for Downward Control, Journal of the Atmospheric sciences Khain A. P., N. Cohen, B. Lynn and A. Pokrovsky, 2008: Possible aerosol effects on lightning activity and structure of hurricanes, Journal of the Atmospheric sciences N. Cohen, 2008: Possible aerosol effects on lightning activity and structure of hurricanes, M.Sc. thesis Khain A. P., N. Cohen, N. Benmoshe and A. Pokrovsky, 2008: Mysterious small aerosols or why lightning may take place in the eyewalls of hurricanes, Proc. The 15th International Conference on Clouds and Precipitation, Cancun, Mexico N. Cohen and A. Khain, 2008: Effects of aerosols on lightning and intensity of hurricanes, Proc. The 15th International Conference on Clouds and Precipitation, Cancun, Mexico Khain, A. P., N. Cohen, Y. Segal, B. Lynn, and D. Rosenfeld, 2007: Effects of aerosols on lightning and structure of tropical cyclones, Proc. IUGG XXIV, Perugia, Italy, International Association of Meteorology and Atmospheric Sciences, 986 Chapters in books • N. Cohen, A. P. Khain, 2009: Effects of aerosols on lightning and intensity of landfalling hurricanes, Chapter in the book: Hurricanes and Climate Change, Elsner and Jagger In the popular media • Rain Tsong, 2015: Patterns in Monsoons: Climate Change or Human Error?, Yale scientific magazine (interview) In preparation • N. Y. Cohen and W. R. Boos, 2016: The importance of unresolved topographic waves over Tibet to the large-scale precipitation • N. Y. Cohen, W. R. Boos, M. Gehne, and G. Kiladis, 2016: Spectral-trend estimation of incomplete historical geophysical data: application for Indian monsoon depression trends • N. Y. Cohen and E. P. Gerber, 2016: Investigation of structural changes to the stratospheric circulation in future climate • N. Y. Cohen, M. J. Alexander, E. Manzini, M. Sigmond, A. Bushell, F. Lott, M. Pulido, K. Sato, 2016: Constraints on atmospheric gravity wave tuning Journals reviewing Journal of the Atmospheric sciences, Journal of Climate, Climate Dynamics, Quarterly Journal of the Royal Meteorological Society Memberships American Geophysical Union, American Meteorological Society Technical Skills Highly proficient in • Matlab, Fortran 77/90, LaTeX, Office, Windows, UNIX. • State-of-the-art numerical models as the Weather Research and Forecasting (WRF), the Community Earth System Model (CESM), and GFDL’s dynamical core. • Meteorological reanalysis data sets (MERRA, JRA25, JRA55, ERA-Interim) and satellite observations (TRMM, SSMI, QuikScat, WindSat, NOAA’s OLR). Academic Visits • • • April 2014: Member of the International Space Science Institute (ISSI) gravity wave team, Bern, Switzerland August 2012: Dynamical Core Model Intercomparison Project (DCMIP) Summer School, NCAR, Boulder, Colorado, USA July 2008: WRF-Var and WRF-Chem tutorials, NCAR , Boulder, Colorado, USA Teaching Experience • • • • • • • • • Analysis II, TA, Courant Institute, Fall 2013 Analysis I, TA, Courant Institute, Spring 2013 Analysis I and II, TA, Courant Institute, Fall 2012 ODE, TA, Courant Institute, Spring 2012 Calculus I, TA, Courant Institute, Fall 2010 Environmental Remote Sensing, TA, The Hebrew University, Fall 2008 Introduction to Climate, TA, The Hebrew University, Spring 2008 Climate Change, TA, The Hebrew University, Spring 2008 Chemistry and Meteorology for 4th-12th grade students, Instructor, The Community Youth of The Hebrew University, Israel, 2006 - 2008 Awards and Scholarships • • • • • • GSAS MacCracken fellowship, 2009-2014 ICCP fellowship, Cancun, Mexico, 2008 Excellence fellowship, Institute of Earth Sciences, The Hebrew University, Israel, 2007-2008 Reserve fellowship, The Jewish Agency for Israel, 2006 Dean’s list of excellence, The Hebrew University, Israel, 2004-2005 Fellowship, Ministry of Education, Israel, 2004 Talks • • • • • • • • • • • • • New York, NY, Columbia University, September 2015: Perspectives on moist baroclinic instability: implications for the growth of monsoon depressions New York, NY, Columbia University, Monsoons & ITCZ workshop, September 2015: Interaction between gravity wave drag over the Tibetan Plateau and Tropical convection Minneapolis ,MN, The 20th Conference on Atmospheric and Oceanic Fluid Dynamics, June 2015: Interaction between gravity wave breaking over the Tibetan Plateau and Tropical convection Minneapolis ,MN, The 20th Conference on Atmospheric and Oceanic Fluid Dynamics, June 2015: Mechanisms for interactions between resolved and parameterized waves in the stratosphere (poster) Tropical Extremes workshop, Yale University, New Haven, April 2015: Has the number of Indian summer monsoon depressions decreased over the last 30 years? Stony Brook University, New York, January 2015: What drives the Brewer-Dobson Circulation? Annual AMS, Phoenix, Arizona, January 2015: What drives the Brewer-Dobson Circulation? Yale University, postdoc seminar, Connecticut, April 2014: What DRIVES the Brewer-Dobson Circulation? International Space Science Institute, Bern, Switzerland, April 2014: What DRIVES the BrewerDobson Circulation? Columbia University, SEAS Colloquium in Climate Science, New York, October 2013: Stratospheric interactions between resolved and unresolved waves: mechanisms, implications and limitations on downward control Yale University, AOFD seminar, Connecticut, September 2013: Stratospheric interactions between resolved and unresolved waves: mechanisms, implications and limitations on downward control Tel Aviv University, Israel, August 2013: Stratospheric interactions between resolved and unresolved waves - the limits of downward control Newport , RI, the 17th Conference on Middle Atmosphere, June 2013: Constraints on the Wave Forcing in the Stratosphere: The Illusion of downward control • • • • • • • • • • • • • • • • • • • Newport, RI, the 19th Conference on Atmospheric and Oceanic Fluid Dynamics, June 2013: On the evolution of the potential vorticity. A new perspective on the rule of the Eliassen-Palm flux divergence and the downward control principle (poster) Courant Institute, Student Seminar, February 2013: Old ideas-New perspectives Princeton University, AOS days, June 2012: Stratospheric interactions between resolved and unresolved waves Courant Institute, NY, Student Seminar, February 2012: On the generalized Lagrangian mean theory and the TEM equations University of Frankfurt/Main, Frankfurt, Germany, November 2011: Stratospheric interactions between resolved and unresolved waves Max-Planck Institute, Hamburg, Germany, November 2011: Stratospheric interactions between resolved and unresolved waves Woods Hole, GCC meeting, October 2011: Stratospheric interactions between resolved and unresolved waves Courant Institute, NY, Student Seminar, October 2011: Stratospheric interactions between resolved and unresolved waves MIT, Cambridge , MA, AOS days, June 2011: A modeling framework to study interaction between resolved and parameterized waves Spokane ,WA, The 18th Conference on Atmospheric and Oceanic Fluid Dynamics, June 2011: A modeling framework to study interaction between resolved and parameterized waves Courant Institute, NY, Student Seminar, May 2011: Toward studying the dynamics of unresolved gravity waves in a GCM Courant Institute, NY, Student Seminar, November 2010: The momentum flux of internal waves for simple harmonic time dependent flows University of Maryland, AOS days, May 2010: On the momentum flux of internal waves for different stratified shear flows Courant Institute, NY, Student Seminar, April 2010: On the momentum flux of internal waves for different stratified shear flows Courant Institute, NY, cSplash, April 2010: Sunrise, sunset, and local time calculations Courant Institute, NY, Student Seminar, October 2009 : On aerosols lightning and hurricanes Cancun, Mexico, The 15th International Conference on Clouds and Precipitation, June 2008: Effects of aerosols on lightning and intensity of hurricanes (Poster) Be'er-Sheba University, Israel, Israeli Association for Aerosol Research meeting, December 2007: Possible aerosol effects on lightning activity and structure of hurricanes The Hebrew University of Jerusalem, Israel, Seminar, December 2007: On possible aerosol effects on lightning activity and structure of landfalling hurricanes