11 July 2019, Continuing North; 84N

During 11 July 2019 we continued north towards the pole. We saw an increase in ice thickness and the appearance of small amounts of older ice. Note we have not distinguished between 2nd year and multiyear ice, though a lot of what we describe as multiyear is likely second year. This is due to a lack of confidence in our ability to distinguish the two.

Observations:
84.26N, 64.04E: 9/10 ice, all First Year 100cm, Large floes. 2/10 melt, linked with frozen tops, very shallow, solid bottoms, very little freeboard to the ponds.

84.52N, 66.09E: 9/10 ice; 0/10 Multiyear 150cm, 9/10 First year 100cm, Small floes. 2/10 melt, linked with frozen tops, solid bottoms. Pond freeboard increased, perhaps 10cm.

84.59N, 65.96E: On station, no thickness recordings possible. 0/10 Multiyear with 1/10 melt, discrete ponds with open surface and solid bottoms, 10-15cm freeboard to ponds. 9/10 First year ice; Medium floes, 2/10 melt with linked ponds, open surface, all with thaw holes. Some rotten ice seen.

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