Mass gatherings of walrus follow-up – sea ice maps for 1978 and 1972

polarbearscience

Walruses as polar bear prey and sea ice were on my mind last night and I remembered that we DO have detailed sea ice information for 1978 and 1972 – from the sea ice atlas put together by University of Alaska Fairbanks (UAF), which has ice concentration maps for Alaska going back to 1850 — and for every year up to 2013 (reported previouslyhere).

Chukchi Sea walrus, June 2014. US Fish and Wildlife Service. Chukchi Sea walrus, June 2014. US Fish and Wildlife Service.

I’ve copied some of the ice maps below.

It is clear that ice was available close to Wrangel Island in 1972 when walruses chose to haul out on the island in huge numbers. And in 1978, there was ice present to the north of the walrus herd, but they had moved away from the ice to get to St. Lawrence Island, where they hauled out in large numbers.

This means it is more likely…

View original post 506 more words

Advertisements

Author: Canadian Climate Guy

Stuff goes here.

Leave a Reply

Please log in using one of these methods to post your comment:

WordPress.com Logo

You are commenting using your WordPress.com account. Log Out / Change )

Twitter picture

You are commenting using your Twitter account. Log Out / Change )

Facebook photo

You are commenting using your Facebook account. Log Out / Change )

Google+ photo

You are commenting using your Google+ account. Log Out / Change )

Connecting to %s