Multidecadal fCO2 Increase Along the United States Southeast Coastal Margin

Reimer, Janet J.; Wang, Hongjie; Vargas, Rodrigo; Cai, Wei‐Jun

doi:10.1002/2017jc013170

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i

Multidecadal fCO2 Increase Along the United States Southeast Coastal Margin

2017
By Reimer, Janet J. ; Wang, Hongjie ; Vargas, Rodrigo ; ...
Source: Journal of Geophysical Research: Oceans, 122(12), 10061-10072

[PDF-1.10 MB]

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Journal Title:

Journal of Geophysical Research: Oceans
Personal Author:

Reimer, Janet J. ; Wang, Hongjie ; Vargas, Rodrigo ; Cai, Wei‐Jun

Reimer, Janet J. ; Wang, Hongjie ; Vargas, Rodrigo ; Cai, Wei‐Jun Less -
NOAA Program & Office:

NOS (National Ocean Service) ; NCCOS (National Centers for Coastal Ocean Science)

NOS (National Ocean Service) ; NCCOS (National Centers for Coastal Ocean Science) Less -
Description:

Coastal margins could be hotspots for acidification due to terrestrial-influenced CO2 sources. Currently there are no long-term (>20 years) records from biologically important coastal environments that could demonstrate sea surface CO2 fugacity (fCO2) and pH trends. Here, multidecadal fCO2 trends are calculated from underway and moored time series observations along the United States southeast coastal margin, also referred to as the South Atlantic Bight (SAB). fCO2 trends across the SAB, derived from ∼26 years of cruises and ∼9.5 years from a moored time series, range from 3.0 to 4.5 µatm yr−1, and are greater than the open ocean increases. The pH decline related to the fCO2 increases could be as much as −0.004 yr−1; a rate greater than that expected from atmospheric-influenced pH alone. We provide evidence that fCO2 increases and pH decreases on an ocean margin can be faster than those predicted for the open ocean from atmospheric influence alone. We conclude that a substantial fCO2 increase across the marginal SAB is due to both increasing temperature on the middle and outer shelves, but to lateral land-ocean interactions in the coastal zone and on inner shelf.
Keywords:

[+]

Ocean acidification
Source:

Journal of Geophysical Research: Oceans, 122(12), 10061-10072
DOI:

https://doi.org/10.1002/2017jc013170
ISSN:

2169-9275;2169-9291;
Format:

PDF
Publisher:

American Geophysical Union (AGU)
Document Type:

Journal Article
Funding:

Grant no. NA15NOS4780185
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CHORUS
Main Document Checksum:

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urn:sha256:40cfac6f4626bd2e84c9e92466c0dbcd258417737b205a0a934ac8a439f8f823
Download URL:

https://repository.library.noaa.gov/view/noaa/49923/noaa_49923_DS1.pdf
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Multidecadal fCO2 Increase Along the United States Southeast Coastal Margin

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