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Seen from Space 2003

  Observations of A Scientific Vessel Moving Through An Ice-Bound Sea
-Observation of Sea Ice in the Antarctic-

 
(Photo 1) Ice breaker  

From August to September 2003, EORC researchers observed sea ice in the Bellingshausen Sea, west of the Antarctic Peninsula. On August 21, 2003, five days after leaving the port of Punta Arenas in the south of Chile, they reached the ice-bound sea in an ice breaker (photo 1).

(Image 1) Ratio of ice covered area to unit area (sea-ice concentration) (Image 2) Enlarged image

Image 1 shows the ratio of ice covered area to unit area acquired using AMSR-E on August 21. The black area is Antarctica and the red coloration represents a high ratio of ice coverage. As the ratio of ice coverage to unit area reduces, the color changes from yellow to green to blue. The dark-blue area is sea with no ice coverage. Image 2 is an enlargd view of a section of image 1. The ice breaker's route and direction from 10 a.m. to 5 p.m. on August 21 is indicated by arrows. This figure shows that the ice breaker entered an area with no ice, from an ice-bound region.

(Photo 2) Grease ice (Photo 3) Pancake ice 1 (Photo 4) Pancake ice 1

Photos 2, 3, and 4 are samples of sea ice taken from the ice breaker on August 21. At first, grease ice appeared (photo 2), and this was followed by the formation of pancake ice. Ice flows, made from grease ice then formed (photos 3 and 4).
(Photo 5) Observation scene (Photo 6) Masashige Nakayama, EORC reseacher

Over the following days,the sea-ice distribution was observed in detail, by measuring the thickness of ice and the depth of snow on the sea ice (photo 5). This observation data will be used to validate AMSR, AMSR-E, and GLI images and also to develop an algorithm to describe the patterns of ice development in the Bellingshausen Sea.

Related topics: Video Movies taken during the observation

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