. The Eastern Bering Sea Shelf : oceanography and resources / edited by Donald W. Hood and John A. Calder . HEAVILY RAFTED Figure 12-6. The shape of floe Scott, (a) Surface map of Scott (courtesy Vernon Squire); (b) two under-ice cross sections of scott. Letters A, B, C, D, E on cross sections refer to survey lines on (a). induced relative motion of the surrounding floes. We also observed at least seven walruses on the ice v^^ithin 100 m of our station, which is further evidence (see Burns, Ice As a Marine Mammal Habitat, Volume 2 of this book) that these large floes surrounded by open water s
. The Eastern Bering Sea Shelf : oceanography and resources / edited by Donald W. Hood and John A. Calder . HEAVILY RAFTED Figure 12-6. The shape of floe Scott, (a) Surface map of Scott (courtesy Vernon Squire); (b) two under-ice cross sections of scott. Letters A, B, C, D, E on cross sections refer to survey lines on (a). induced relative motion of the surrounding floes. We also observed at least seven walruses on the ice v^^ithin 100 m of our station, which is further evidence (see Burns, Ice As a Marine Mammal Habitat, Volume 2 of this book) that these large floes surrounded by open water serve as habitat for walrus. Fig. 12-8a is an aerial photograph from an altitude of 150 m of site W2 in the interior zone, where we landed on the large floe in the center of the photo- graph. The ice further in from this station also resembled this floe; the floes were large and flat, with a low-amplitude swell propagating through them. Fig. 12-8b shows the surface view; the ice was m thick and covered by about 5 mm of snow. Line B The B-traverse took place on the next day, 7 March, at the positions shown on Fig. 12-1. As on the previous day, the wind was negligible and the air temperature was about — 5 C. Fig. 12-9 is a sketch of the ice properties along the traverse line; again, the ice consisted of an edge zone measuring about 13 km wide and a transition zone 3 km wide with an abrupt transition from the rectangular floes to the large interior floes. For the stations along the traverse, namely the ship, B4, and B5, Fig. 12-lOa first shows an aerial view of the 90-m-long ship. In the center foreground, a party working on the ice is visible; Fig. 12-10b shows a close-up of this party from the ship. Again, the floes measured 10-20 m across and coring obser- vations showed that the occupied floe was more than 1 m thick. Many of the floes seen near the ship had wetted surfaces, caused when the swell washes water onto the ice surface. Further into the pack. Fig. 12-lla and 12
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