Revisiting AMOC Transport Estimates From Observations and Models

Danabasoglu, Gokhan; Castruccio, Frederic S.; Small, R. Justin; Tomas, Robert; Frajka‐Williams, Eleanor; Lankhorst, Matthias

doi:10.1029/2021GL093045

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Revisiting AMOC Transport Estimates From Observations and Models

2021
By Danabasoglu, Gokhan ; Castruccio, Frederic S. ; Small, R. Justin ; ...
Source: Geophysical Reseach Letters 48(10): e2021GL0923045

[PDF-638.91 KB]

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Details:

Journal Title:

Geophysical Research Letters
Personal Author:

Danabasoglu, Gokhan ; Castruccio, Frederic S. ; Small, R. Justin ; Tomas, Robert ; Frajka‐Williams, Eleanor ; ... More +

Danabasoglu, Gokhan ; Castruccio, Frederic S. ; Small, R. Justin ; Tomas, Robert ; Frajka‐Williams, Eleanor ; Lankhorst, Matthias Less -
NOAA Program & Office:

OAR (Oceanic and Atmospheric Research) ; CPO (Climate Program Office) ; GOMO (Global Ocean Monitoring and Observing)

OAR (Oceanic and Atmospheric Research) ; CPO (Climate Program Office) ; GOMO (Global Ocean Monitoring and Observing) Less -
Description:

Reference level assumptions used to calculate the Atlantic meridional overturning circulation transports at the RAPID and Meridional Overturning Variability Experiment (MOVE) observing arrays are revisited in an eddying ocean model. Observational transport calculation methods are complemented by several alternative approaches. At RAPID, the model transports from the observational method and the model truth (based on the actual model velocities) agree well in their mean and variability. There are substantial differences among the transport estimates obtained with various methods at the MOVE site. These differences result from relatively large and time-varying reference velocities at depth in the model, not supporting a level-of-no-motion. The methods that account for these reference velocities properly at MOVE produce transports that are in good agreement with the model truth. In contrast with the observational estimates, the model transport trends at MOVE and RAPID largely agree with each other on pentadal to multi-decadal time scales.
Keywords:

[+]

Ocean Currents Oceanography Atlantic Meridional Overturning Circulation (AMOC)
Source:

Geophysical Reseach Letters 48(10): e2021GL0923045
DOI:

https://doi.org/10.1029/2021GL093045
Document Type:

Journal Article
Funding:

Grant no. NA18OAR4310429 ; Grant no. NA20OAR4320278

Grant no. NA18OAR4310429 ; Grant no. NA20OAR4320278 Less -
Place as Subject:

Atlantic Ocean
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Submitted
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urn:sha256:8e07bf4dfaa8b17dd102824201d139460a0f2479b3314d2c8a4c1432b1d0fbd5
Download URL:

https://repository.library.noaa.gov/view/noaa/44715/noaa_44715_DS1.pdf
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