Brad Weir, Scientist

Brad Weir

Contact Info

Bldg 33, Rm G109
Greenbelt, MD 20771
Phone: (301) 614-6033

Research Interests

Dr. Brad Weir is the lead developer of NASA's Goddard Earth Observing System (GEOS) Constituent Data Assimilation System (CoDAS) — a state-of-the-art statistical method for estimating atmospheric trace gas abundances based on satellite observations. He has over 10 years of experience developing and applying mathematical and statistical methods to address questions about the physics, chemistry, and biology of the Earth's atmosphere, ocean, and land surface. His work has appeared in Science, the websites of National Geographic and the BBC, the NASA COVID-19 Dashboard, and the NASA/ESA/JAXA trilateral Earth Observing Dashboard.


Dr. Brad Weir joined USRA in 2013 to work on the assimilation of satellite-based retrievals of trace gasses into the Goddard Earth Observing System (GEOS). He received his B.A. from New York University and his Ph.D. from the University of Arizona, both in mathematics. His doctoral research, advised by Prof. Juan M. Restrepo, focused on modeling the interaction of waves and currents in the near-shore ocean. Following that, he took a postdoctoral position at the College of Earth, Ocean, and Atmospheric Sciences at Oregon State University. There, he helped develop a modern particle filter technique and used it to estimate the parameters of a marine biogeochemical model based on remote and in situ observations. This was part of a collaborative effort with Profs. Robert N. Miller and Yvette H. Spitz (at Oregon State) and Prof. Alexandre J. Chorin and Dr. Matthias Morzfeld (at Lawrence Berkeley National Laboratory).