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Spatial variation in soil active-layer geochemistry across hydrologic margins in polar desert ecosystems
Hydrology and Earth System Sciences
Polar deserts are characterized by severe spatialtemporal limitations of liquid water. In soil active layers of the Antarctic Dry Valleys, liquid water is infrequently available over most of the arid terrestrial landscape. However, soils on the margins of glacial melt-water streams and lakes are visibly wet during the brief Austral summer when temperatures permit the existence of liquid water. We examined the role of these hydrologic margins as preferential zones for the transformation anddoi:10.5194/hess-13-2349-2009 fatcat:cvtwra5x5vdszkdy45snq3dyvy