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SCAR Working Group on Meteorology

data over ice sheets and over sea ice that could be generated by other programmes as a secondary output. Altimetric data on the surface form of the Antarctic ice sheet obtained to 72° S by SEA SAT illustrates the potential of this approach. The Working Group stresses the need to extend coverage to as high a latitude as possible. REC-1983-GLAC-3. The working group recommends maximum support for the development of any satellite techniques that will provide new information on Antarctic glaciological parameters, especially those providing data on temperature, accumulation rates, surface roughness, as well as detailed contour mapping of the ice sheet and accurate measurements of changes of surface level. REC-1983-GLAC-4. The working group stresses the need to extend the coverage of altimetric and other studies to as high a latitude as possible, and recommends that all appropriate steps be taken to communicate this need to the agencies planning future launches. REC-1983-GLAC-5. There is a strong scientific need to complete the radio echo soundings of a 50to 100-km square grid of the Antarctic ice sheet. Many nations are carrying out radio echo soundings in selected areas. The working group recommends that the Scott Polar Research Institute draw up a map of existing radio echo sounding tracks and transmit this to each SCAR nation with a request that each indicate the areas that they intend to cover with radio echo sounding during the next five years. The working group will then review the position at its next meeting. The working group would welcome any bilateral arrangements to extend radio-echo coverage of the Antarctic ice sheet. REC-1983-GLAC-6. Recognizing the importance of obtaining information on the nature of the bedrock and the geothermal flux beneath the Antarctic ice sheet, the working group recommends that, whenever technically possible, where drilling reaches the base of the ice sheet the opportunity be taken to core drill into the underlying rock and to measure temperature gradients in the resulting hole. (The Working Group on Solid Earth Geophysics subsequently endorsed this recommendation as a joint recommendation of both working groups.)