t l R r

The Welsh Ice Cap Interaction

The following Google Earth animation is an ‘optimal’ numerical reconstruction of the Late Devensian Welsh Ice Cap, derived in the publication ‘The last Welsh Ice Cap: Part 1’. Timeslices of the ice-surface velocity begin at 27.8 ka BP and refresh every 200 years.

To view properly:

  1. Make sure the time slider is zoomed out to the maximumzoom_out.
  2. Separate the slider controls to each end and wait for all the timeslices to load.sliders
  3. Drag the sliders together again, then scroll through the glacial cycle to see the ice cap grow and shrink.


For best results, download the kml file to your home computer and open it with Google Earth. There you can control aspects such as animation speed and relief exaggeration, as well as bringing in your own GIS data to compare.

Discussion of the ice cap’s dynamics can be found in an accompanying paper ‘The last Welsh Ice Cap: Part 2’. Furthermore, movie animations are available to download here.

[maptype=G_SATELLITE_3D_MAP; width=708; height=708; googlebar=disabled; ruler=hide; mapnormal=hide; maphybrid=hide; mapsat=hide; mapphysical=hide; maposm=hide; mapocm=hide]

Landform data within the domain is taken from the BRITICE database compiled by Chris Clark et al. at The University of Sheffield:

  • Clark, C.D., Evans, D.J.A., Khatwa, A., Bradwell, T., Jordan, C.J., Marsh, S.H., Mitchell, W.A. and Bateman, M.D. (2004). Map and GIS database of landforms and features related to the last British Ice Sheet. Boreas, 33(4), 359-375.

1 comment to “The Welsh Ice Cap Interaction”

  • chris clark, March 1, 2013 at 12:45

    That is very nice Henry, really useful to be able to play with the slider button and see the model on background topography. Great stuff. Thanks