Correspondence:
p1 Scott Polar Research Institute, University of Cambridge, Cambridge CB2 1ER. Present address: Department of Oceanography, Naval Postgraduate School, Monterey, California 93940, USA.
Footnotes
* Scott Polar Research Institute, University of Cambridge, Cambridge CB2 1ER.
** Norsk Polarinstirutt, PO Box 158, 1330 Oslo Lufthavn, Norway. (Contribution No 203.)