The fields of study he is best known for: Ecosystem Hydrology Carbon dioxide David W. Clow focuses on Hydrology, Snowmelt, Weathering, Streamflow and Drainage basin. His study in Hydrology is interdisciplinary in nature, drawing from both Biomass, Seston, Nitrate and Eutrophication. His Snowmelt research is multidisciplinary, relying on both Growing season, Snowpack, STREAMS, Groundwater and Nutrient. His Snowpack study incorporates themes from Soil water, Climatology and Surface runoff. His studies deal with areas such as Mineralogy and Calcite as well as Weathering. His Streamflow research includes themes of Climate change, Ecosystem and Atmospheric sciences.