Biogeochemical cycles role of small upstream reservoirs in trapping organic carbon, nutrients, metals, and PAHs roles of chemical weathering and groundwater in the global carbon cycle deep-sea coral uranium geochemistry a proxy of ocean acidification and oxygen minimum zone processes Hydrology in the critical zone influence of land use changes on recharge, runoff, and contaminant transport effects of wildfires on catchment function, including biogeochemical and ecohydrological processes in California hydrologic and geochemical controls on nitrate distribution in an agriculture-impacted region, Columbia Plateau aquifer, Washington relationship between rare vegetation and mineral springs in the Sierra NevadaCoastal processes effect of human activities and changing climate on coastal water, sediment, and nutrient budgets, northern California coast role of coastal wetlands in carbon and nutrient cycles, northern California coast impact of groundwater discharge on coastal ecosystems, California's Sonoma CoastSustainability greenhouse gas inventory of Pacific's Stockton campus waste audit of solid waste stream on Pacific's Stockton campus impact of education and outreach on student drinking water habits