Dissimilar Sensitivities of Ocean Acidification Metrics to Anthropogenic Carbon Accumulation in the Central North Pacific Ocean and California Current Large Marine Ecosystem

Arroyo, Mar C.; Fassbender, Andrea J.; Carter, Brendan R.; Edwards, Christopher A.; Fiechter, Jerome; Norgaard, Addie; Feely, Richard A.

doi:10.1029/2022GL097835

i

Dissimilar Sensitivities of Ocean Acidification Metrics to Anthropogenic Carbon Accumulation in the Central North Pacific Ocean and California Current Large Marine Ecosystem

Supporting Files

2022
By Arroyo, Mar C. ; Fassbender, Andrea J. ; Carter, Brendan R. ; ...

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Journal Title:

Geophysical Research Letters
Personal Author:

Arroyo, Mar C. ; Fassbender, Andrea J. ; Carter, Brendan R. ; Edwards, Christopher A. ; Fiechter, Jerome ; Norgaard, Addie ; Feely, Richard A.
NOAA Program & Office:

OAR (Oceanic and Atmospheric Research) ; PMEL (Pacific Marine Environmental Laboratory) ; CICOES (Cooperative Institute for Climate, Ocean and Ecosystem Studies)
Description:

We analyze and compare changes in ocean acidification metrics caused by anthropogenic carbon (Canth) accumulation in the North Pacific Ocean and California Current Large Marine Ecosystem (CCLME). The greatest declines in pH and carbonate mineral saturation state occur near the surface, coincident with the highest Canth concentrations. However, maximal increases in the partial pressure of carbon dioxide (pCO2) and hydrogen ion concentration occur subsurface where Canth values are lower. We attribute dissimilar sensitivities of these metrics to background ocean chemistry, which has naturally high pCO2 and low buffering capacity in subsurface waters due to accumulated byproducts of organic matter respiration, which interacts with Canth. In the CCLME, rising subsurface pCO2 has increased the frequency, duration, and intensity of hypercapnia (pCO2 ≥ 1,000 μatm) on the continental shelf. Our findings suggest that hypercapnia induced by Canth accumulation can co-occur with hypoxia in the CCLME and is an additional modern stressor for marine organisms.
Keywords:

Carbon Cycle (Biogeochemistry) Hypercapnia Ocean Acidification Carbon Cycle (Biogeochemistry) Ocean Acidification California Current Large Marine Ecosystem Carbon Cycle General Earth And Planetary Sciences Geophysics Hypercapnia North Pacific Ocean Ocean Acidification Revelle Factor
Source:

Geophysical Research Letters, 49, e2022GL097835
DOI:

https://doi.org/10.1029/2022GL097835
Document Type:

Journal Article
Funding:

Grant no. NA19OAR0170357 ; Grant no. NA20OAR4320271
Place as Subject:

North Pacific Ocean
Rights Information:

CC BY
Compliance:

Submitted
Main Document Checksum:

urn:sha256:56eba860e9790fa4f09004c6ef27261617cbb4f87c0a762e754f85fb9478626e
Download URL:

https://repository.library.noaa.gov/view/noaa/47423/noaa_47423_DS1.pdf
File Type:

[PDF - 2.51 MB ]

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