Seasonality of Solute Flux and Water Source Chemistry in a Coastal Glacierized Watershed Undergoing Rapid Change: Wolverine Glacier Watershed, Alaska

As glaciers around the world rapidly lose mass, tight coupling between and downstream ecosystems is resulting in widespread impacts on global hydrologic biogeochemical cycling. However, a range of challenges make it difficult to conduct research glacierized systems, our knowledge seasonally changing processes solute sources signatures limited. This turn hampers ability predictions composition flux. We conducted broad water sampling campaign order understand present-day partitioning associated solutes Alaska's Wolverine Glacier watershed. established relationship electrical conductivity streamflow at watershed outlet divide melt season into four hydroclimatic periods. Across periods, we observed shift nonglacial source waters from snowmelt-dominated overland shallow subsurface flow paths deeper groundwater paths. also low- high-efficiency subglacial drainage network flushing stored subglacially with higher loads. used calcium, dominant dissolved ion, samples estimate fluxes for each period across two seasons. found 40% 55% Ca2+ export occurred during late rainy period. coupled characterization chemical makeup magnitude provides new insight creates framework quantify predict changes season.