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Geothermal Heating in the Panama Basin. Part II: Abyssal Water Mass Transformation

Lookup NU author(s): Dr Donata Banyte, Dr Miguel Morales Maqueda, Dr Alex Megann



This is the authors' accepted manuscript of an article that has been published in its final definitive form by Wiley-Blackwell, 2018.

For re-use rights please refer to the publisher's terms and conditions.


The Panama Basin serves as a laboratory to investigate abyssal water upwelling. The basin has only a single abyssal water inflow pathway through the narrow Ecuador Trench. The estimated critical inflow through the Trench reaches 0.34 ± 0.07 m/s, resulting in an abyssal water volume inflow of 0.29 ± 0.07 Sv. The same trench carries the return flow of basin waters that starts just 200 m above the bottom and is approximately 400‐m deeper than the depth of the next possible deep water exchange pathway at the Carnegie Ridge Saddle. The curvature of temperature‐salinity diagrams is used to differentiate the effect of geothermal heating on the deep Panama Basin waters that was found to reach as high as 2,200‐m depth, which is about 500 m above the upper boundary of the abyssal water layer.

Publication metadata

Author(s): Banyte D, Morales Maqueda MA, Smeed DA, Megann A, Hobbs R, Recalde S

Publication type: Article

Publication status: Published

Journal: Journal of Geophysical Research: Oceans

Year: 2018

Volume: 123

Issue: 10

Pages: 7393-7406

Print publication date: 01/10/2018

Online publication date: 24/08/2018

Acceptance date: 20/08/2018

Date deposited: 24/01/2019

ISSN (print): 2169-9275

ISSN (electronic): 2169-9291

Publisher: Wiley-Blackwell


DOI: 10.1029/2018JC013869


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