BedMachine v3: Complete Bed Topography and Ocean Bathymetry Mapping of Greenland From Multibeam Echo Sounding Combined With Mass Conservation

  • Morlighem, M
  • Williams, CN
  • Rignot, E
  • An, L
  • Arndt, JE
  • Bamber, JL
  • Catania, G
  • Chauché, N
  • Dowdeswell, JA
  • Dorschel, B
  • Fenty, I
  • Hogan, K
  • Howat, I
  • Hubbard, A
  • Jakobsson, M
  • Jordan, TM
  • Kjeldsen, KK
  • Millan, R
  • Mayer, L
  • Mouginot, J
  • Noël, BPY
  • O'Cofaigh, C
  • Palmer, S
  • Rysgaard, S
  • Seroussi, H
  • Siegert, MJ
  • Slabon, P
  • Straneo, F
  • van den Broeke, MR
  • Weinrebe, W
  • Wood, M
  • Zinglersen, KB
Publication date
November 2017
Publisher
Wiley
Journal
Geophysical Research Letters
Language
English

Abstract

This is the final version of the article. Available from AGU via the DOI in this record.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 thickness data through a mass conservation approach. A new 150 m horizontal resolution bed topography/bathymetric map of Greenland is constructed with seamless transitions at the ice/ocean interface, yielding major improvements over previous data sets, particularly in t...

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