Dryad
Published March 23, 2018 | Version v1
Dataset Open

Southeast Greenland Bed Elevation - v2

Creators

  • 1. University of California, Irvine

Description

We employ NASA's Operation IceBridge (OIB) high‐resolution airborne gravity from 2016, NASA's Ocean Melting Greenland (OMG) bathymetry from 2015, ice thickness from Operation IceBridge (OIB) from 2010‐2015, and BedMachine v3 to analyze 20 major southeast Greenland glaciers. The results reveal glacial fjords several hundreds of meters deeper than previously thought; the full extent of the marine‐based portions of the glaciers; deep troughs enabling warm, salty Atlantic Water (AW) to reach the glacier fronts and melt them from below; and few shallow sills that limit the access of AW. The new oceanographic and topographic data help to fully resolve the complex pattern of historical ice front positions from the 1930s to 2017: glaciers exposed to AW and resting on retrograde beds have retreated rapidly, while glaciers perched on shallow sills or standing in colder waters or with major sills in the fjords have remained stable.

Please cite the following paper when using this dataset:

Millan R., E. Rignot, J. Mouginot, M. Wood, A.A Bjørk, and M. Morlighem (2018), Vulnerability of Southeast Greenland glaciers to warm Atlantic Water from Operation IceBridge and Ocean Melting Greenland data, Geophys. Res. Lett., 45, doi:10.1002/2017GL076561.

 

Projection informations can be found below:

 
Size is 2760, 4044
Coordinate System is:
PROJCS["WGS 84 / NSIDC Sea Ice Polar Stereographic North",
    GEOGCS["WGS 84",
        DATUM["WGS_1984",
            SPHEROID["WGS 84",6378137,298.257223563,
    PROJECTION["Polar_Stereographic"],
    PARAMETER["latitude_of_origin",70],
    PARAMETER["central_meridian",-45],
    PARAMETER["scale_factor",1],
    PARAMETER["false_easting",0],
    PARAMETER["false_northing",0],
    AUTHORITY["EPSG","3413"]]
Origin = (-109288.637000000002445,-2616698.799999999813735)
Pixel Size = (150.000000000000000,-150.000000000000000)
Metadata:
  AREA_OR_POINT=Area
Image Structure Metadata:
  INTERLEAVE=BAND
Corner Coordinates:
Upper Left  ( -109288.637,-2616698.800) ( 47d23'29.82"W, 66d 9'34.51"N)
Lower Left  ( -109288.637,-3223298.800) ( 46d56'30.90"W, 60d50'52.57"N)
Upper Right (  304711.363,-2616698.800) ( 38d21'28.41"W, 66d 1'23.84"N)
Lower Right (  304711.363,-3223298.800) ( 39d35'58.74"W, 60d44'22.03"N)
Center      (   97711.363,-2919998.800) ( 43d 5' 0.37"W, 63d29'36.85"N)

Files

Files (178.6 MB)

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md5:e6aaea1f8f1cdc6267c127a57270ec49
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