A reconstructed South Atlantic Meridional Overturning Circulation time series since 1870

Lopez, Hosmay; Goni, Gustavo; Dong, Shenfu

doi:10.1002/2017gl073227

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i

A reconstructed South Atlantic Meridional Overturning Circulation time series since 1870

2017
By Lopez, Hosmay ; Goni, Gustavo ; Dong, Shenfu
Source: Geophysical Research Letters, 44(7), 3309-3318.

[PDF-2.59 MB]

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Details:

Journal Title:

Geophysical Research Letters
Personal Author:

Lopez, Hosmay ; Goni, Gustavo ; Dong, Shenfu

Lopez, Hosmay ; Goni, Gustavo ; Dong, Shenfu Less -
NOAA Program & Office:

OAR (Oceanic and Atmospheric Research) ; AOML (Atlantic Oceanographic and Meteorological Laboratory) ; CIMAS (Cooperative Institute for Marine and Atmospheric Studies)

OAR (Oceanic and Atmospheric Research) ; AOML (Atlantic Oceanographic and Meteorological Laboratory) ; CIMAS (Cooperative Institute for Marine and Atmospheric Studies) Less -
Description:

This study reconstructs a century-long South Atlantic Meridional Overturning Circulation (SAMOC) index. The reconstruction is possible due to its covariability with sea surface temperature (SST). A singular value decomposition (SVD) method is applied to the correlation matrix of SST and SAMOC. The SVD is performed on the trained period (1993 to present) for which Expendable Bathythermographs and satellite altimetry observations are available. The joint modes obtained are used in the reconstruction of a monthly SAMOC time series from 1870 to present. The reconstructed index is highly correlated to the observational based SAMOC time series during the trained period and provides a long historical estimate. It is shown that the Interdecadal Pacific Oscillation (IPO) is the leading mode of SAMOC-SST covariability, explaining similar to 85% with the Atlantic Nino accounting for less than 10%. The reconstruction shows that SAMOC has recently shifted to an anomalous positive period, consistent with a recent positive shift of the IPO.
Source:

Geophysical Research Letters, 44(7), 3309-3318.
DOI:

https://doi.org/10.1002/2017gl073227
Document Type:

Journal Article
Rights Information:

CC BY-NC-ND
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Submitted
Main Document Checksum:

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urn:sha256:f1e86d8a680b1dcd6f37d1e3c5de85122941af2b7c32405c27733310dacd75f1
Download URL:

/view/noaa/18008/noaa_18008_DS1.pdf
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