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Bathymetry of Southeast Greenland From Oceans Melting Greenland (OMG) Data
Author(s) -
An Lu,
Rignot Eric,
Chauche Nolwenn,
Holland David M.,
Holland Denise,
Jakobsson Martin,
Kane Emily,
Wood Michael,
Klaucke Ingo,
Morlighem Mathieu,
Velicogna Isabella,
Weinrebe Wilhelm,
Willis Josh K.
Publication year - 2019
Publication title -
geophysical research letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.007
H-Index - 273
eISSN - 1944-8007
pISSN - 0094-8276
DOI - 10.1029/2019gl083953
Subject(s) - geology , bathymetry , glacier , oceanography , continental shelf , greenland ice sheet , ice sheet , future sea level , iceberg , water mass , ice shelf , cryosphere , geomorphology , sea ice
Southeast Greenland has been a major participant in the ice sheet mass loss over the last several decades. Interpreting the evolution of glacier fronts requires information about their depth below sea level and ocean thermal forcing, which are incompletely known in the region. Here, we combine airborne gravity and multibeam echo sounding data from the National Aeronautics and Space Administration's Oceans Melting Greenland (OMG) mission with ocean probe and fishing boat depth data to reconstruct the bathymetry extending from the glacier margins to the edges of the continental shelf. We perform a three‐dimensional inversion of the gravity data over water and merge the solution with a mass conservation reconstruction of bed topography over land. In contrast with other parts of Greenland, we find few deep troughs connecting the glaciers to the sources of warm Atlantic Water, amidst a relatively uniform, shallow (350 m) continental shelf. The deep channels include the Kangerlugssuaq, Sermilik, Gyldenløve, and Tingmiarmiut Troughs.