The Passage of Canadian Basin Deep Water Over the Lomonosov Ridge and Through the Eurasian Basin of the Arctic Ocean: Results From the LOMROG-2007 Icebreaker Expedition

• During the LOMROG-2007 icebreaker expedition to the area where the Lomonosov Ridge attaches to the Greenland shelf, we observed a well defined signal in water mass properties of clear CBDW origin. The major part of CBDW passes the Lomonosov Ridge at the 1870 m deep channel near the North Pole (88 25' N, 150 E) as was discovered during the Beringia/Hotrax 2005 exploration of the sill area. During the LOMROG expedition we observed the signal of CBDW along the Amundsen Basin side of the Lomonosov Ridge slope north of Greenland and further along the Greenland shelf towards east and south. The signal with Canadian Basin properties is clearly seen in the TS structure as well as in the oxygen, silicate and CFC signals around 2000 m depth. No indication of a deep overflow across the Lomonosov Ridge at the channel just north of Greenland was seen.

Ämnesord

NATURVETENSKAP  -- Kemi (hsv//swe)

NATURAL SCIENCES  -- Chemical Sciences (hsv//eng)

Nyckelord

4207 Arctic and Antarctic oceanography (9310

9315)

4283 Water masses

4532 General circulation (1218

1222)

4536 Hydrography and tracers

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