North Atlantic Deep Water (NADW)

Assembled from 42 blocks · 2 evidence · 45 related

1. Story
2. The southward-flowing deep limb of the Atlantic overturning, assembled from three sources: water that convects in the Labrador Sea in winter, and two dense overflows that spill across the Greenland–Scotland Ridge from the Nordic seas. The Denmark Strait overflow crosses a sill about 620 m deep and carries a revised mean of 3.20 ± 0.50 Sv; the Faroe Bank Channel overflow contributes roughly 2.1 ± 0.2 Sv. Both plunge down the continental slope, entrain several times their own volume of ambient water, and continue south along the western boundary of the Atlantic as a deep current. Most of the dense water that feeds the Faroe Bank Channel originates in the Greenland Sea and the Arctic Ocean rather than in the channel itself.
3. Knowledge
4. Atlantic Meridional Overturning Circulation (AMOC)
5. North Atlantic Deep Water (NADW)
6. Antarctic Bottom Water (AABW)
7. Labrador Sea
8. Denmark Strait Sill
9. Connections
10. Labrador Sea
11. Antarctic Bottom Water (AABW)
12. Denmark Strait Sill
13. Atlantic Meridional Overturning Circulation (AMOC)
14. OSNAP is deployed across the subpolar North Atlantic
15. OSNAP moves the engine room out of the Labrador Sea
16. North Atlantic Deep Water (NADW)
17. North Atlantic — Grand Banks approaches
18. Overturning in the Subpolar North Atlantic Program (OSNAP)
19. OSNAP is deployed across the subpolar North Atlantic
20. OSNAP moves the engine room out of the Labrador Sea
21. Polynya
22. North Atlantic Deep Water (NADW)
23. Weddell Sea
24. Thermohaline Circulation
25. Antarctic meltwater is projected to slow the abyssal cell
26. North Atlantic Deep Water (NADW)
27. Gulf Stream
28. Thermohaline Circulation
29. Antarctic Circumpolar Current (ACC)
30. North Atlantic Deep Water (NADW)
31. RAPID-MOCHA-WBTS Array at 26.5°N
32. Overturning in the Subpolar North Atlantic Program (OSNAP)
33. Meridional Ocean Heat Transport
34. The RAPID array begins continuous AMOC measurement at 26.5°N
35. OSNAP moves the engine room out of the Labrador Sea
36. IPCC AR6 assesses AMOC decline as very likely and collapse as unlikely this century
37. A statistical early-warning analysis puts an AMOC collapse mid-century
38. A physics-based early warning signal is proposed
39. Twenty-two years of continuous AMOC observation
40. Evidence
41. The Denmark Strait overflow, crossing a sill about 620 m deep, has a revised mean transport of 3.20 ± 0.50 Sv; literature estimates span roughly 3.2–3.5 Sv, and the Faroe Bank Channel overflow contributes about 2.1 ± 0.2 Sv. Read via search summary, not fetched.
42. Over the first 21 months of the OSNAP array (August 2014 – April 2016) overturning averaged 15.6 ± 0.8 Sv across OSNAP East and 2.1 ± 0.3 Sv across OSNAP West, contradicting the prevailing view that Labrador Sea convection dominates subpolar overturning variability. Read via search summaries and press releases; the article itself was not fetched.