Dr. Frolking's background and training are in physics and biogeochemical cycling, with particular focus on climatic controls on trace gas emissions from terrestrial ecosystems. His current research focuses on:

??? Biogeochemical modeling of greenhouse gas emissions from agro-ecosystems with the DNDC model, and carbon cycling in northern peatland ecosystems.

??? Land use and land cover change: developing high quality datasets of agricultural land use and national, regional, and global scales, using a combination of remote sensing and census data, for use in biogeochemical modeling.

??? Land use and land cover change: developing a global, gridded history of land use transitions (conversions into and out of agriculture, logging, shifting cultivation) for use in Earth System Models.

??? Optical and microwave remote sensing of terrestrial land surface phenology, both landscape freeze/thaw transitions, and seasonal vegetation dynamics.

Research Interests:

Trace gas fluxes from agriculture.

Carbon and nitrogen biogeochemistry.

Contemporary carbon balance and long-term carbon accumulation in northern peatlands.

Agricultural land use and its impacts on global biogeochemistry.

Developing maps of global land use.