The Impact of Winds on AMOC in a Fully‐Coupled Climate Model

Details

• Journal Title:
  Geophysical Research Letters
• Personal Author:
  Roach, Lettie A. ; Blanchard‐Wrigglesworth, Edward ; Ragen, Sarah ; Cheng, Wei ; Armour, Kyle C. ; Bitz, Cecilia M.
• NOAA Program & Office:
  OAR (Oceanic and Atmospheric Research) ; CICOES (Cooperative Institute for Climate, Ocean and Ecosystem Studies) ; PMEL (Pacific Marine Environmental Laboratory)
• Description:
  Here we investigate the role of the atmospheric circulation in the Atlantic Meridional Overturning Circulation (AMOC) by comparing a fully-coupled large ensemble, a forced-ocean simulation, and new experiments using a fully-coupled global climate model where winds above the boundary layer are nudged toward reanalysis. When winds are nudged north of 45°N, agreement with RAPID array observations of AMOC at 26.5°N improves across several metrics. The phasing of interannual variability is well-captured due to the response of the local Ekman component in both wind-nudging and forced-ocean simulations, however the variance remains underestimated. The mean AMOC strength is substantially reduced relative to the
• Keywords:
  General Earth And Planetary Sciences Geophysics General Earth And Planetary Sciences General Earth And Planetary Sciences
• Source:
  Geophysical Research Letters, 49(24)
• DOI:
  https://doi.org/10.1029/2022gl101203
• ISSN:
  0094-8276 ; 1944-8007
• Format:
  PDF
• Publisher:
  American Geophysical Union (AGU)
• Document Type:
  Journal Article
• Funding:
  Grant no. NA18OAR4310274 ; Grant no. NA18NWS4620043B ; Grant no. NA20OAR4320271
• License:
  https://creativecommons.org/licenses/by/4.0/
• Rights Information:
  CC BY
• Compliance:
  Library
• Main Document Checksum:
  urn:sha256:4164c0a298d59a30f2cf465b62c387a0a7bb830070601d9961473b7b17ae05d6
• Download URL:
  https://repository.library.noaa.gov/view/noaa/54494/noaa_54494_DS1.pdf
• File Type:
  [PDF - 2.45 MB ]