ECCO Consortium
Fukumori, Ichiro
Wang, Ou
Fenty, Ian
Forget, Gael
Heimbach, Patrick
Ponte, Rui M.
2021-02-10
<p>This note provides a brief synopsis of ECCO Version 4 Release 4 (R4), an updated edition to<br>
the global ocean state estimate described by Forget et al. (2015b, 2016) and Fukumori et al.<br>
(2017). Release 4 is available at https://ecco.jpl.nasa.gov/drive/files/Version4/Release4.<br>
As of this writing, Version 4 represents the latest ocean state estimate of the Consortium for<br>
Estimating the Circulation and Climate of the Ocean (ECCO) (Wunsch et al., 2009; Wunsch and<br>
Heimbach, 2013) that synthesizes nearly all modern observations with an ocean circulation<br>
model (MITgcm, originally described by Marshall et al., 1997) into coherent, physically<br>
consistent descriptions of the ocean’s time-evolving state covering the era of satellite altimetry.<br>
Among its characteristics, Version 4 (Forget et al., 2015b; Release 1 [R1]) is the first multidecadal<br>
ECCO estimate (1992-2011) that is truly global, including the Arctic Ocean. Unlike<br>
previous versions, the model uses a nonlinear free surface formulation and real freshwater flux<br>
boundary condition, permitting a more accurate simulation of sea level change. In addition to<br>
estimating forcing and initial conditions as done in earlier analyses, the Version 4 estimate also<br>
adjusts the model’s mixing parameters that enables an improved fit to observations (Forget et al.,<br>
2015a). The Version 4 synthesis also incorporates a diffusion operator in evaluating model-data<br>
misfits (Forget and Ponte, 2015) and controls (Weaver and Courtier, 2001), accounting for some<br>
of the spatial correlation that exist among these elements.</p>
https://doi.org/10.5281/zenodo.4470149
oai:zenodo.org:4470149
Zenodo
https://zenodo.org/communities/ecco
https://doi.org/10.5281/zenodo.3765928
info:eu-repo/semantics/openAccess
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ECCO
adjoint
estimation
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Synopsis of the ECCO Central Production Global Ocean and Sea-Ice State Estimate, Version 4 Release 4
info:eu-repo/semantics/report