Dr. James Foster
Name: James Foster, GoNorth! Hydrometerological Research
Organization: NASA Goddard Space Flight Center - Hydrological Sciences Research
Cool Science: Physical Scientist
Who Am I:
Dr. Foster received his B.S. and M.A. degrees in Geography from the University of Maryland, and his Ph.D. degree in Geography from the University of Reading in England, 1995. He has worked as a physical scientist at Goddard Space Flight Center, in the Hydrological Sciences Branch, since 1978. His research interests include remote sensing of snow and ice utilizing various satellite and aircraft sensors. Dr. Foster has been involved in research programs and field work that have taken him to Antarctica, Greenland, Alaska, the Northwest Territories of Canada, Svalsbard, the Rocky Mountains, the Great Plains and New England.
My Cool Research:
To acquire a deeper understanding of the impact and interactions of seasonal snow with other components of the Earth system, such as cycling of water and energy, a more complete and detailed knowledge of the physics of snow, including how snow crystals evolve, is required. In addition, before we can confidently address whether or not the Earth (or regions of our planet) is changing and what the consequences of change may be, we must first develop highly reliable and accurate models and algorithms to increase the certitude, quantitatively, that in fact, change is occurring. Is change occurring in specific regions or across the globe and is the change limited to one sphere, in the cryosphere for example or in many realms?
My interest in the work GoNorth! is undertaking is the collection (by the GoNorth! Team) and analysis of snow crystals (using a scanning electron microscope) from several different sites in northern North America and Eurasia ; namely northern Alaska, north-central Canada, north-eastern Siberia and northern Scandinavia and the Kola Peninsula. This activity, over the course of multiple snow seasons, will allow us to develop a method to estimate grain size and density and better improve estimation of SWE derived from passive microwave algorithms. By collecting and analyzing snow crystals precisely and accurately over the course of a snow season, a simple snowpack metamorphosis model can be improved greatly and thus, errors of passive microwave global SWE estimation can be reduced.
My Cool Publications: (selected)
Foster, J. L., J. S. Barton, A. T. C. Chang, and D. K. Hall, "Snow crystal orientation effects on the scattering of passive microwave radiation," IEEE Transactions on Geoscience and Remote Sensing, Vol. 38, No. 5, 2430-2434, 2000.
Hall, D.K., J.L. Foster, V.V. Salomonson, A.G. Klein and J.Y.L.Chien, Development of a Technique to Assess Snow-Cover Mapping Accuracy from Space, IEEE Transactions on Geoscience and Remote Sensing, Vol. 39, No.2, 2001.
Foster, J., A. Chang, D. Hall, and R. Kelly, "Seasonal snow extent and snow mass in South America using passive microwave data" Polar Geography, Vol. 25, N0. 1, pp. 41-53, 2002.
Foster, J., A. Chang, L. Tsang, C, Chen, D. Hall, A. Tait, and J. Barton, "35 GHz measurements of CO2 crystals" Radio Science, Vol. 38, #2, 2003.
Foster, J. L., A. Rango, E. Josberger, E. Erbe, C. Pooley, and W. Wergin, "Low temperature scanning electron microscopy of snow crystal metamorphism in winter snow covers" Scanning, Vol. 26, No. 2, 68-69, 2004.
Kelly, R.E.J., Chang, A.T.C, Foster, J.L. and Hall, D.K., "Using remote sensing and spatial models to monitor snow depth and snow water equivalent," in R.E.J. Kelly, N.A. Drake and S. Barr (eds.) Spatial Modelling of the Terrestrial Environment, Chichester: John Wiley and Sons Ltd., 2004.
Other Cool Stuff:
Educational video: Hall, D.K., A.B. Tait and J.L. Foster, "Observations of Snow Cover from the Ground and Space," completed June 2001 (Produced by C. Starr/Code 588), a 17-minute long educational video.
Eastern Snow Conference, President, 1988-1989
Science Question of the Week (1996-2006) -- http://www.gsfc.nasa.gov/science.html.
Earth Science Picture of the Day (2001- present) -- http://epod.usra.edu/