OSNAP moves the engine room out of the Labrador Sea
The first 21 months of OSNAP data, from August 2014 to April 2016, gave a mean overturning of 15.6 ± 0.8 Sv across OSNAP East and 2.1 ± 0.3 Sv across OSNAP West — a factor of roughly seven. Published in Science, the result contradicted the prevailing assumption that Labrador Sea convection dominates the strength and variability of subpolar overturning, and relocated most of the water-mass transformation to the Irminger and Iceland basins east of Greenland.
Observed — measured or witnessed, with the observation cited.
Subjects
- Overturning in the Subpolar North Atlantic Program (OSNAP) · research programme · Subpolar North Atlantic — Canada to Greenland to Scotland · not located
- Labrador Sea · maritime region · Canada; Greenland (Denmark)
- Atlantic Meridional Overturning Circulation (AMOC) · natural phenomenon · Atlantic Ocean · not located
- North Atlantic Deep Water (NADW) · natural phenomenon · North Atlantic and Nordic seas · not located
Evidence
Partly verified — Core facts are sourced; some optional detail is deliberately absent.
A sea change in our view of overturning in the subpolar North Atlantic
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.
Science (American Association for the Advancement of Science) · 2019-02 · Partly verified
Lozier, M. S. et al., Science 363, doi:10.1126/science.aau6592
Recorded on Overturning in the Subpolar North Atlantic Program (OSNAP)
- The RAPID array begins continuous AMOC measurement at 26.5°N
- Twenty-two years of continuous AMOC observation
- OSNAP is deployed across the subpolar North Atlantic
- OSNAP moves the engine room out of the Labrador Sea
- IPCC AR6 assesses AMOC decline as very likely and collapse as unlikely this century
- A statistical early-warning analysis puts an AMOC collapse mid-century
- A physics-based early warning signal is proposed
Related
Related because they share a subject in the Atlas — never because the text looks similar.
- A physics-based early warning signal is proposed · 2024-02
- A statistical early-warning analysis puts an AMOC collapse mid-century · 2023-07
- IPCC AR6 assesses AMOC decline as very likely and collapse as unlikely this century · 2021
- OSNAP is deployed across the subpolar North Atlantic · 2014
- The RAPID array begins continuous AMOC measurement at 26.5°N · 2004-04
- Twenty-two years of continuous AMOC observation · 2004-04 – 2023-01