Autonomous wintertime observations of air-sea exchange in the Gulf Stream reveal a perfect storm for ocean CO2 uptake.

Nickford, S.; Palter, J. B.; Donohue, K.; Fassbender, A. J.; Gray, A. R.; Long, J.; Sutton, A. J.; Bates, N. R.; Takeshita, Y.

doi:10.1029/2021GL096805

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Autonomous wintertime observations of air-sea exchange in the Gulf Stream reveal a perfect storm for ocean CO2 uptake.

2022
By Nickford, S. ; Palter, J. B. ; Donohue, K. ; ...
Source: Geophysical Research Letters, 49, e2021GL096805
Series: PMEL contribution ; 5282

[PDF-1.54 MB]

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Journal Title:

Geophysical Research Letters
Personal Author:

Nickford, S. ; Palter, J. B. ; Donohue, K. ; Fassbender, A. J. ; Gray, A. R. ; ... More +

Nickford, S. ; Palter, J. B. ; Donohue, K. ; Fassbender, A. J. ; Gray, A. R. ; Long, J. ; Sutton, A. J. ; Bates, N. R. ; Takeshita, Y. Less -
NOAA Program & Office:

OAR (Oceanic and Atmospheric Research) ; PMEL (Pacific Marine Environmental Laboratory)

OAR (Oceanic and Atmospheric Research) ; PMEL (Pacific Marine Environmental Laboratory) Less -
Description:

A scarcity of wintertime observations of surface ocean carbon dioxide partial pressure (pCO2) in and near the Gulf Stream creates uncertainty in the magnitude of the regional carbon sink and its controlling mechanisms. Recent observations from an Uncrewed Surface Vehicle (USV), outfitted with a payload to measure surface ocean and lower atmosphere pCO2, revealed sharp gradients in ocean pCO2 across the Gulf Stream. Surface ocean pCO2 was lower by ∼50 μatm relative to the atmosphere in the subtropical mode water (STMW) formation region. This undersaturation combined with strong wintertime winds allowed for rapid ocean uptake of CO2, averaging −11.5 mmol m−2 day−1 during the February 2019 USV mission. The unique timing of this mission revealed active STMW formation. The USV proved to be a useful tool for CO2 flux quantification in the poorly observed, dynamic western boundary current environment.
Keywords:

[+]

Automated Vehicles Carbon Gulf Stream
Source:

Geophysical Research Letters, 49, e2021GL096805
Series:

PMEL contribution ; 5282
DOI:

https://doi.org/10.1029/2021GL096805
Document Type:

Journal Article
Funding:

Grant no. NA20OAR4320271
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Submitted
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urn:sha256:32777c6a262bb30152e4fb760156b052d5cedfd8d3cac9e697668da627d0b6fb
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https://repository.library.noaa.gov/view/noaa/40146/noaa_40146_DS1.pdf
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Autonomous wintertime observations of air-sea exchange in the Gulf Stream reveal a perfect storm for ocean CO2 uptake.

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