Widespread Moulin Formation During Supraglacial Lake Drainages in Greenland
نویسندگان
چکیده
منابع مشابه
Sediment plume response to surface melting and supraglacial lake drainages on the Greenland ice sheet
Increased mass losses from the Greenland ice sheet and inferred contributions to sea-level rise have heightened the need for hydrologic observations of meltwater exiting the ice sheet. We explore whether temporal variations in ice-sheet surface hydrology can be linked to the development of a downstream sediment plume in Kangerlussuaq Fjord by comparing: (1) plume area and suspended sediment con...
متن کاملFracture propagation to the base of the Greenland Ice Sheet during supraglacial lake drainage.
Surface meltwater that reaches the base of an ice sheet creates a mechanism for the rapid response of ice flow to climate change. The process whereby such a pathway is created through thick, cold ice has not, however, been previously observed. We describe the rapid (<2 hours) drainage of a large supraglacial lake down 980 meters through to the bed of the Greenland Ice Sheet initiated by water-d...
متن کاملEstimating Supraglacial Lake Depth in West Greenland Using Landsat 8 and Comparison with Other Multispectral Methods
Liquid water stored on the surface of ice sheets and glaciers impacts surface mass balance, ice dynamics, and heat transport. Multispectral remote sensing can be used to detect supraglacial lakes and estimate their depth and area. In this study, we use in situ spectral and bathymetric data to assess lake depth retrieval using the recently launched Landsat 8 Operational Land Imager (OLI). We als...
متن کاملIce Sheet During Supraglacial Lake Drainage Fracture Propagation
http://www.sciencemag.org/cgi/content/full/320/5877/778 version of this article at: including high-resolution figures, can be found in the online Updated information and services, http://www.sciencemag.org/cgi/content/full/1153360/DC1 can be found at: Supporting Online Material found at: can be related to this article A list of selected additional articles on the Science Web sites http://www.sc...
متن کاملIce dynamic response to two modes of surface lake drainage on the Greenland ice sheet
Supraglacial lake drainage on the Greenland ice sheet opens surface-to-bed connections, reduces basal friction, and temporarily increases ice flow velocities by up to an order of magnitude. Existing field-based observations of lake drainages and their impact on ice dynamics are limited, and focus on one specific draining mechanism. Here, we report and analyse global positioning system measureme...
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ژورنال
عنوان ژورنال: Geophysical Research Letters
سال: 2018
ISSN: 0094-8276,1944-8007
DOI: 10.1002/2017gl075659