Hydrologic response and interaction between natural and human driven processes, land surface remote sensing and multi-sensor, -spectrum, -resolution data assimilation; hydrology contribution to sea level change, snow hydrology.
Atmospheric science: stratospheric ozone depletion, air quality and greenhouse gases. Trace gas biogeochemistry of halocarbons, hydrocarbons and reduced sulfur compounds. Biosphere-atmosphere flux measurements in natural and human-impacted landscapes. Education development in ocean, climate and atmospheric sciences.