The Pacific Equatorial Undercurrent in Three Generations of Global Climate Models and Glider Observations

Karnauskas, Kristopher B.; Jakoboski, Julie; Johnston, T. M. Shaun; Owens, W. Brechner; Rudnick, Daniel L.; Todd, Robert E.

doi:10.1029/2020jc016609

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The Pacific Equatorial Undercurrent in Three Generations of Global Climate Models and Glider Observations

2020
By Karnauskas, Kristopher B. ; Jakoboski, Julie ; Johnston, T. M. Shaun ; ...
Source: Journal of Geophysical Research: Oceans, 125(11)

[PDF-2.60 MB]

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Details:

Journal Title:

Journal of Geophysical Research: Oceans
Personal Author:

Karnauskas, Kristopher B. ; Jakoboski, Julie ; Johnston, T. M. Shaun ; Owens, W. Brechner ; Rudnick, Daniel L. ; ... More +

Karnauskas, Kristopher B. ; Jakoboski, Julie ; Johnston, T. M. Shaun ; Owens, W. Brechner ; Rudnick, Daniel L. ; Todd, Robert E. Less -
NOAA Program & Office:

CIRES (Cooperative Institute for Research in Environmental Sciences)
Description:

The Equatorial Undercurrent (EUC) is a vital component of the coupled ocean ‐atmosphere system in the tropical Paci ﬁc. The details of its termination near the Galápagos Islands in the eastern Paciﬁc have an outsized importance to regional circulation and ecosystems. Subject to diverse physical processes, the EUC is also a rigorous benchmark for global climate models (GCMs). Simulations ofthe EUC in three generations of GCMs are evaluated relative to recent underwater glider observations along 93°W. Simulations of the EUC have improved, but a slow bias of ~36% remains in the eastern Paci ﬁc, along with a dependence on resolution. Additionally, the westward surface current is too slow, andstratiﬁcation is too strong (weak) by ~50% above (within) the EUC. These biases have implications for mixing in the equatorial cold tongue. Downstream lies the Galápagos, now resolved to varying
Keywords:

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Earth And Planetary Sciences (miscellaneous) Geochemistry And Petrology Geophysics Oceanography Space And Planetary Science
Source:

Journal of Geophysical Research: Oceans, 125(11)
DOI:

https://doi.org/10.1029/2020jc016609
ISSN:

2169-9275;2169-9291;
Format:

PDF
Publisher:

American Geophysical Union (AGU)
Document Type:

Journal Article
Funding:

Grant no. NA13OAR4830216
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Other
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Library
Main Document Checksum:

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urn:sha256:11959dda2841b125a1cfa9dcb2c079e634f9532d408c6df01f85c8d282bf17a9
Download URL:

https://repository.library.noaa.gov/view/noaa/53615/noaa_53615_DS1.pdf
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