Sean Freeman

sean.freeman@colostate.edu
seanwfreeman.com | https://github.com/freemansw1


Biosketch

I grew up in West Virginia and Kentucky and graduated with my bachelor's degree from Florida State University in meteorology and computer science. I have always been passionate about using novel technology to push forward atmospheric research. Fortunately, I have been able to work on interesting problems at the intersection of technology and science in my graduate work. I have been in the van den Heever group since 2015, receiving my MS in Atmospheric Science in 2018. I am currently a PhD student using the CAMP2Ex Field Campaign dataset and the RAMS numerical model to study how tropical deep convection is modulated by changes to the thermodynamic, dynamic, and aerosol environment. In addition to my current CAMP2Ex-related work, I work on how we can best utilize drones for observations in atmospheric science and novel ways of moving numerical modeling forward. I enjoy hiking, traveling, baking, playing sports with my friends, and watching college football outside of work.

Education

MS, Atmospheric Science, Colorado State University, 2018
BS, Meteorology, Florida State University, 2015
BS, Computer Science, Florida State University, 2015

Awards

Shrake-Culler Scholarship, 2020
NASA Group Achievement Award (CAMP2Ex), 2020
NSF Graduate Research Opportunities Worldwide, 2019-2020 (declined, COVID-19)
NCAR ASP Summer Colloquium Participant, 2018
AMS Mesoscale Conference Travel Grant, 2017
National Science Foundation Graduate Research Fellowship, 2015
American Meteorological Society Graduate Fellowship, 2015
Phi Beta Kappa, 2015
American Meteorological Society Pedro S. Grau Scholarship in Meteorology, 2014
NASA Group Achievement Award (SEAC4RS), 2013
Barry Goldwater Scholarship Honorable Mention, 2013
Chi Epsilon Pi, 2013

Publications

van den Heever, S.C., L.D. Grant, S.W. Freeman, P.J. Marinescu, J. Barnum, J. Bukowski, L. Casas, A.J. Drager, B. Fuchs, G.R. Herman, S.M. Hitchcock, P.C. Kennedy, E.R. Nielsen, J.M. Park, K. Rasmussen, M.N. Razin, R. Riesenberg, E.M. Riley Dellaripa, C.J. Slocum, B.A. Toms, and A. van den Heever, 2021: The Colorado State University Convective CLoud Outflows and UpDrafts Experiment (C3LOUD-Ex). Bull. Amer. Met. Soc., 102, E1283-E1305. DOI:10.1175/BAMS-D-19-0013.1.

Marinescu, P.J., P.C. Kennedy, M.M. Bell, A.J. Drager, L.D. Grant, S.W. Freeman, and S.C. van den Heever, 2020: Updraft vertical velocity observations and uncertainties in High Plains supercells using radiosondes and radars. Mon. Wea. Rev., 148, 4435-4452. https://doi.org/10.1175/MWR-D-20-0071.1.

Freeman, S.W., A.L. Igel, and S.C. van den Heever, 2019: Relative sensitivities of rainfall prediction to fixed shape parameters and collection efficiences. Q. J. Roy. Met. Soc., 145, 2181-2201. DOI:10.1002/qj.3550.

Kalmus, P., Kahn, B.H.,Freeman, S.W., van den Heever, S.C., 2019: Trajectory-enhanced AIRS observations of environmental factors leading to tornadogenesis. Mon. Wea. Rev., 147, 1633-1653.

Heath, N. K., H. E. Fuelberg, S. Tanelli, F. J. Turk, R. P. Lawson, S. Woods, and S. Freeman (2017), WRF nested large-eddy simulations of deep convection during SEAC4RS, J. Geophys. Res. Atmos., 122, 3953–3974, doi:10.1002/2016JD025465

First-Author Presentations

Freeman, Sean W, S.C. van den Heever, J.S. Reid, D.J. Posselt. Tropical Deep Convective Cloud Processes and Variability in the Different Thermodynamic and Aerosol Environments of CAMP2Ex and PISTON. International Conference on Clouds and Precipitation, virtual, August 2021 (O)

Freeman, Sean W and S.C. van den Heever. Aerosol Impacts on Deep Convective Lifecycle and Properties in the Maritime Continent. AMS Annual Meeting, virtual, January 2021 (O)

Freeman, Sean W, S.C. van den Heever, J.S. Reid, and D.J. Posselt. Variations in Deep Convective Storm Morphology and Organization in the Dynamic and Thermodynamic Environments of CAMP2Ex and PISTON. AGU Annual Meeting, virtual, December 2020 (P)

Freeman, Sean W, S.C. van den Heever, and G.A. Sokolowsky. Dropsonde Observations during CAMP2Ex. AVAPS Users Group Meeting, virtual, April 2020 (O)

Freeman, Sean W., S.C. van den Heever, J.S. Reid, and D.J. Posselt. Tropical Deep Convective Morphology in the Different Thermodynamic and Aerosol Environments of CAMP2Ex and PISTON 100th AGU Annual Meeting, San Francisco, CA, December 2019 (O)

Freeman, Sean W., J. Bukowski, L.D. Grant, P.J. Marinescu, S.M. Hitchcock, J.M. Park, and S. C. van den Heever.Use of sUAS in Sampling Cold Pools: Instrumentation Calibration/Validation and First Results 99th AGU Annual Meeting, Washington, DC, December 2018 (P)

Freeman, Sean W., S. C. van den Heever, and A. L. Igel, Good Nus and Bad Nus: An Investigation of the Raindrop Shape Parameter in a Deep Convective Simulation? 15th AMS Conference on Cloud Physics and Radiation, Vancouver, BC, July 2018. (P)

Freeman, Sean W., S. C. van den Heever, B. H. Kahn, and P. M. Kalmus, Thermodynamic Environmental Conditions Leading to Tornadogenesis. 98th AMS Annual meeting, Austin, TX, January 2018 (O)

Freeman, Sean W., J. Bukowski, S. M. Hitchcock, L. D. Grant, P. J. Marinescu, and S. C. van den Heever, A Novel Use of Multirotor sUAS to Sample Severe Convective Storms during the C3LOUD-Ex Field Campaign. 98th AMS Annual meeting, Austin, TX, January 2018 (O)

Freeman, Sean W., S. C. van den Heever, Environmental Controls on Tornadogenesis. 17th AMS Conference on Mesoscale Processes, San Diego, CA, July 2017

Freeman, Sean W., S. C. van den Heever, and A. L. Igel, Does the shape of the assumed raindrop size distribution matter in convective storms? 17th International Conference on Clouds and Precipitation, Manchester, UK, July 2016. (O)

Freeman, Sean W., and H. Fuelberg, A High Resolution Atmospheric Chemistry Simulation of Hurricane Sandy (2012). American Meteorological Society Annual Meeting, Phoenix, AZ, Jan. 2015. (O)

Freeman, Sean W., and H. Fuelberg, A High Resolution Atmospheric Chemistry Simulation of Hurricane Sandy (2012). American Meteorological Society Annual Meeting, Phoenix, AZ, Jan. 2015. (O)

Freeman, Sean W., N. K. Heath, and H. Fuelberg, Simulated Convectively Influenced vs. Lightning Influenced Air: Methods for Calculation and Associated Uncertainties. American Geophysical Union Annual Meeting, San Fransisco, CA, Dec 2014. (P)

Freeman, Sean W., N. Grossberg, R. B. Pierce, P. Lee, F. Ngan, E. Yates, L. Iraci, B. Lefer, Evaluation of atmospheric chemical models using aircraft data.
-American Meteorological Society Annual Meeting, Atlanta, GA, Feb. 2014. (P)
-American Geophysical Union Annual Meeting, San Fransisco, CA, Dec 2013. (P)

Freeman, Sean W., R. Mahmood, A. Quintanar, A. Gonzalez, Sensitivity study of soil moisture and carbon dioxide over the Ohio Valley.   241st Meeting of the American Chemical Society, Anaheim, CA, Mar. 2011. (P)

Teaching Experience

ATS 640 (Synoptic Meteorology), Teaching Assistant, Fall 2016
NASA Student Airborne Research Program, Coding Mentor, June - August 2015

Field Experience

Flight Scientist, Flight Planner, Instrument Scientist, NASA Cloud, Aerosol, and Monsoon Processes Philippines Experiment (CAMP2Ex), August–October 2019.
Technical Manager, CSU Convective Cloud Outflows and UpDrafts Experiment (C3LOUD-Ex), July 2016; May-June 2017.

Meteorology and Flight Planning Team Member, NASA Studies of Emissions, Atmospheric Composition, Clouds and Climate Coupling by Regional Surveys (SEAC4RS), August 2013.

Miscellaneous and Media Appearances

FAA Part 107 Licensed UAS Pilot
CAMP2Ex Media Day Presentation, discussed in the Manila Bulletin, October 2019
Interviewed on CSU SOURCE, August 2017
Interviewed on Weather Junkies Podcast, July 2017
Interviewed in CSU Magazine, Winter 2016

Last Updated: 09/21