Demons in the North Atlantic: Variability of Deep Ocean Ventilation

Details

• Journal Title:
  Geophysical Research Letters
• Personal Author:
  MacGilchrist, G. A. ; Johnson, H. L. ; Lique, C. ; Marshall, D. P.
• NOAA Program & Office:
  OAR (Oceanic and Atmospheric Research)
• Description:
  Translation of atmospheric forcing variability into the ocean interior via ocean ventilation is an important aspect of transient climate change. On a seasonal timescale in the subtropics, this translation is mediated by a so-called “Demon” that prevents access to all except late-winter mixed-layer water. Here, we use an eddy-permitting numerical circulation model to investigate a similar process operating on longer (interannual) timescales in the subpolar North Atlantic. We find that variations in atmospheric forcing are mediated in their translation to the ocean interior, with year-to-year changes in the late-winter mixed layer depth being the critical factor. The signature of persistent strong atmospheric forcing driving
• Keywords:
  General Earth And Planetary Sciences Geophysics General Earth And Planetary Sciences General Earth And Planetary Sciences
• Source:
  Geophysical Research Letters, 48(9)
• DOI:
  https://doi.org/10.1029/2020gl092340
• ISSN:
  0094-8276 ; 1944-8007
• Format:
  PDF
• Publisher:
  American Geophysical Union (AGU)
• Document Type:
  Journal Article
• Rights Information:
  Other
• Compliance:
  Library
• Main Document Checksum:
  urn:sha256:4baace74adfb75a34bf980b2194d4cb96f6b074b5a580f60629097a91d95f503
• Download URL:
  https://repository.library.noaa.gov/view/noaa/53952/noaa_53952_DS1.pdf
• File Type:
  [PDF - 1.68 MB ]