Overturning in the Subpolar North Atlantic Program (OSNAP)

Assembled from 31 blocks · 1 evidence · 40 related

1. Story
2. A second trans-basin array, deployed in the summer of 2014 further north than RAPID, running from the Labrador shelf to the southern tip of Greenland (OSNAP West) and from southeastern Greenland across to the Scottish shelf (OSNAP East). It combines around sixty moorings with gliders and floats. Its first results, published in 2019, overturned the textbook picture by showing that the eastern section — the Irminger and Iceland basins — accounts for the great majority of subpolar overturning and its variability, and the Labrador Sea for very little. It is a good example of a long-held mechanism surviving a direct measurement in outline while losing its assumed geography.
3. Knowledge
4. Atlantic Meridional Overturning Circulation (AMOC)
5. Labrador Sea
6. Overturning in the Subpolar North Atlantic Program (OSNAP)
7. Connections
8. Atlantic Meridional Overturning Circulation (AMOC)
9. Labrador Sea
10. OSNAP is deployed across the subpolar North Atlantic
11. OSNAP moves the engine room out of the Labrador Sea
12. Gulf Stream
13. Thermohaline Circulation
14. Antarctic Circumpolar Current (ACC)
15. North Atlantic Deep Water (NADW)
16. RAPID-MOCHA-WBTS Array at 26.5°N
17. Overturning in the Subpolar North Atlantic Program (OSNAP)
18. Meridional Ocean Heat Transport
19. The RAPID array begins continuous AMOC measurement at 26.5°N
20. OSNAP moves the engine room out of the Labrador Sea
21. IPCC AR6 assesses AMOC decline as very likely and collapse as unlikely this century
22. A statistical early-warning analysis puts an AMOC collapse mid-century
23. A physics-based early warning signal is proposed
24. Twenty-two years of continuous AMOC observation
25. North Atlantic Deep Water (NADW)
26. North Atlantic — Grand Banks approaches
27. Overturning in the Subpolar North Atlantic Program (OSNAP)
28. OSNAP is deployed across the subpolar North Atlantic
29. OSNAP moves the engine room out of the Labrador Sea
30. Evidence
31. 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.