How the East Wakes

A new map of Greenland has been made.

Bamber, J.L. et al. doi:10.5194/tc-7-499-2013

For an overview go here. For ice surface views, go here. For dual ice surface and bedrock views, go here.

No isostatic rebound included in the bedrock views. (When the ice melts, the earth beneath will rise as she is unburdened. This effect is not included in the bedrock depictions here.)

The following is a composite image of ice surface, ice velocity and bedrock, from left to right. Each is detailed below.


The following image is the 100m contours of the ice surface
Click on it for a link to a larger version.
NE Greenland
ice surface contours


The following image is the velocity of the ice surface


The following image is the bedrock below the ice
Click on it for a link to a larger version.
Contours of bedrock in NE Greenland


The following image is a close up of the bedrock below the ice below Nioghalvfjerdsfjorden and Zachariae Isstrom. Note that Zachariae is a wider and deeper connection to the future inland sea.

Contours of bedrock below
Nioghalvfjerdsfjorden and Zachariae Isstrom.


The following image is a close up of the ice surface along Nioghalvfjerdsfjorden and Zachariae Isstrom. Note that ice is piling up behind the first, but not the second. The warming ocean reaches deeper under Zachariae. Zachariae is a wider and deeper connection to the future inland sea. For discussion of the trough below Zachariae and inlets for Atlantic Intermediate water melting the base of the ice see here.

Contours of ice surface on
Nioghalvfjerdsfjorden and Zachariae Isstrom.

Bedrock below Dove Bugt, note the areas sparse bathymetry data where the contours are suspiciously long and straight.
Bedrock in the area of Dove Bugt

Surface ice contours of Storstrommen and L. Bistrup Brae
Ice Surface contours of Storstrommen and 
L. Bistrup Brae

Here are some of Helheim. The first is the velocity from Rignot(2012) doi:10.1029/2012GL051634
Ice surface velocity on Helheim

200 m bedrock contours.

200m Bedrock contours under Helheim
200m Bedrock contours under Helheim

Ice surface contours on Helheim, overlaid over bedrock colors.
50m ice surface contours on Helheim

Here are some models of subsurface hydrology in NE Greenland from Lewis(2009) DOI: 10.1002/hyp.7343

hydrology NE Greenland
The following image is a key to the previous image
hydrology NE Greenland

and Livingstone(2013) doi:10.5194/tc-7-1721-2013 (open access)

For a comparison of ice surface and bedrock depth please see this page. For detail on a trough under Zachariae, see here

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