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Norwegian Meteorological Institute met.no
R&D, Section OceanographyNorwegian Meteorological Institute
met.no
Salinity anomalies in the Subpolar Gyre and
the Nordic Seas
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Norwegian Meteorological Institute met.no
R&D, Section Oceanography
Part 1:Results from Curry & Mauritzen (2005)
Objectives:1. quantify how much additional fresh water it took to
cause observed changes in salinity2. how fast this fresh water entered the sub-Arctic ocean3. where this fresh water was stored4. assess the impact of freshening on the Atlantic MOC
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Norwegian Meteorological Institute met.no
R&D, Section Oceanography
Objective 1how muchadditionalfresh waterdid it take?
1.8m fresh-water
3.0m fresh-water
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Norwegian Meteorological Institute met.no
R&D, Section Oceanography
Objective 2how fast did the additional fresh water entered the sub-Arctic?
Great Salinity Anomaly
figure fromwhoi.edu/oceanus
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Norwegian Meteorological Institute met.no
R&D, Section Oceanography
Objective 3where was the additional fresh water stored?
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Norwegian Meteorological Institute met.no
R&D, Section Oceanography
Objective 4how does freshening affect the Atlantic MOC? Denmark StraitFaroe Bank Channel
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Norwegian Meteorological Institute met.no
R&D, Section Oceanography
Part 2:Recent changes
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Norwegian Meteorological Institute met.no
R&D, Section Oceanography
W E
Integrated salt anomalies, basins
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Norwegian Meteorological Institute met.no
R&D, Section Oceanography
Dickson et al.; Nature,2002
Integrated salt anomalies, in
depth
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Norwegian Meteorological Institute met.no
R&D, Section Oceanography
Salinity anomalies, 0-700m
W. Subpolar Basins:
E. Subpolar Basins:
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Norwegian Meteorological Institute met.no
R&D, Section Oceanography
Anomalies in the
Northern Seas
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Norwegian Meteorological Institute met.no
R&D, Section Oceanography
0-700
700-1200
1200-2000
2000-2500
2500-3200
Nor.Seas
1.50 0.85 1.05 0.45 0.35
W. SPB 1.90 1.10 1.60 0.85 0.85
E. SPB 1.40 0.90 1.15 0.55 0.45
Volumes of “slices”