Jonathan Dean-Day

Branch: Atmospheric Science Branch (SGG)

Email: jonathan.m.dean-day@nasa.gov

Phone: (650) 604-5535

Website: https://airbornescience.nasa.gov/mms

Professional Biography

Jonathan Dean-Day graduated from San Jose State University with a B.S. (Meteorology) in 1986 and M.S. (Meteorology) in 1998.  He started his career as a forecast intern at the National Weather Service office in Sacramento, CA, before arriving at the Earth Science Division at Ames Research Center in 1987.  Jon joined the Meteorological Measurement System, for which he serves as the group’s Data Analyst/Meteorologist.  He is responsible for quality control, calibration, and archival of final data products derived from MMS measurements across all participating NASA airborne platforms (ER-2, WB-57F, DC-8, Alpha-Jet, Global Hawk, etc).  For each successive mission, he adapts customized software to incorporate, combine and process data from new and established sensor components.  He develops requirements for in-flight maneuvers, which are individually analyzed to minimize errors in MMS static pressure, temperature, and 3-D winds, and monitors the spectral response of key measurements, serving to maintain high standards of accuracy, precision, and self-consistency in the archived data.  On the research side, Jon has presented posters and given oral presentations at science team meetings, primarily focused on MMS data intercomparisons (e.g., with the NCAR G-V Met System or research-grade radiosondes) but has also examined localized atmospheric phenomena.  Jon’s research interests include the study of gravity waves and understanding the impact of small-scale turbulent mixing and heat and moisture fluxes in the atmosphere.  As opportunity allows, he assists with editing and/or providing input to research papers that incorporate MMS data.  Jon performs his work through Bay Area Environmental Research Institute. 

Select Publications

First Author Publications: 

• Dean-Day, J., T. P. Bui, and C. Chang (2013), An intercomparison of the NASA DC-8 MMS with the NCAR G-V met system and nearby Vaisala GPS radiosondes, DC3 Science Team Meeting, Feb. 25-28, Boulder, CO (submitted).

Co-Authored Publications: 

• Kim, J., et al. (2016), Ubiquitous influence of waves on tropical high cirrus clouds, Geophys. Res. Lett., 43, 5895-5901, doi:10.1002/2016GL069293.
• Ueyama, R., et al. (2014), Dehydration in the tropical tropopause layer: A case study for model evaluation using aircraft observations. , J. Geophys. Res., DOI, doi:10.1002/2013JD021381 (submitted).
• Garrett, T., et al. (2006), Convective formation of pileus cloud near the tropopause, Atmos. Chem. Phys., 6, 1185-1200, doi:10.5194/acp-6-1185-2006.
• Jost, H., et al. (2004), In-situ observations of mid-latitude forest fire plumes deep in the stratosphere, Geophys. Res. Lett., 31, L11101, doi:10.1029/2003GL019253.
• Chan, R., et al. (1992), “A Case Study of the Mountain Lee Wave Event of January 6, Geophys. Res. Lett., 20, 2551-2554.
• Chan, R., et al. (1990), Temperature and Wind Measurements and Model Atmospheres for the 1989 Airborne Arctic Stratospheric Expedition, Geophys. Res. Lett., 17, 341-344.
• Chan, R., et al. (1989), Temperature and Horizontal Wind Measurements on the ER-2 Aircraft during the 1987 Airborne Antarctic Ozone Experiment, J. Geophys. Res., 94, 11,573-11.