Drainage of Southeast Greenland Firn Aquifer Water through Crevasses to the Bed
نویسندگان
چکیده
1 Cryospheric Sciences Laboratory, NASA Goddard Space Flight Center, Greenbelt, MD, USA, 2 Polar Science Center, Applied Physics Laboratory, University of Washington, Seattle, WA, USA, 3 Department of Earth and Space Sciences, University of Washington, Seattle, WA, USA, 4 Goddard Earth Sciences Technology and Research Studies and Investigations, Universities Space Research Association, Columbia, MD, USA
منابع مشابه
Englacial latent-heat transfer has limited influence on seaward ice flux in western Greenland
Surface meltwater can refreeze within firn layers and crevasses to warm ice through latentheat transfer on decadal to millennial timescales. Earlier work posited that the consequent softening of the ice might accelerate ice flow, potentially increasing ice-sheet mass loss. Here, we calculate the effect of meltwater refreezing on ice temperature and softness in the Pâkitsoq (near Swiss Camp) and...
متن کاملQuantifying supraglacial meltwater pathways in the Paakitsoq region, West Greenland
Increased summer ice velocities on the Greenland ice sheet are driven by meltwater input to the subglacial environment. However, spatial patterns of surface input and partitioning of meltwater between different pathways to the base remain poorly understood. To further our understanding of surface drainage, we apply a supraglacial hydrology model to the Paakitsoq region, West Greenland for three...
متن کاملBedMachine v3: Complete Bed Topography and Ocean Bathymetry Mapping of Greenland From Multibeam Echo Sounding Combined With Mass Conservation
Greenland's bed topography is a primary control on ice flow, grounding line migration, calving dynamics, and subglacial drainage. Moreover, fjord bathymetry regulates the penetration of warm Atlantic water (AW) that rapidly melts and undercuts Greenland's marine-terminating glaciers. Here we present a new compilation of Greenland bed topography that assimilates seafloor bathymetry and ice thick...
متن کاملRevisiting a classification scheme for U.S.-Mexico alluvial basin-fill aquifers.
Intermontane basins in the Trans-Pecos region of westernmost Texas and northern Chihuahua, Mexico, are target areas for disposal of interstate municipal sludge and have been identified as possible disposal sites for low-level radioactive waste. Understanding ground water movement within and between these basins is needed to assess potential contaminant fate and movement. Four associated basin a...
متن کاملToward Monitoring Surface and Subsurface Lakes on the Greenland Ice Sheet Using Sentinel-1 SAR and Landsat-8 OLI Imagery
Supraglacial lakes are an important component of the Greenland Ice Sheet’s mass balance and hydrology, with their drainage affecting ice dynamics. This study uses imagery from the recently launched Sentinel-1A Synthetic Aperture Radar (SAR) satellite to investigate supraglacial lakes in West Greenland. A semi-automated algorithm is developed to detect surface lakes from Sentinel-1 images during...
متن کامل