Characterizing Subsurface Oxygen Variability in the California Current System (CCS) and Its Links to Water Mass Distribution

Schultz, Cristina; Dunne, John P.; Liu, Xiao; Drenkard, Elizabeth; Carter, Brendan

doi:10.1029/2023jc020000

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The NOAA IR serves as an archival repository of NOAA-published products including scientific findings, journal articles, guidelines, recommendations, or other information authored or co-authored by NOAA or funded partners. As a repository, the NOAA IR retains documents in their original published format to ensure public access to scientific information.

i

Characterizing Subsurface Oxygen Variability in the California Current System (CCS) and Its Links to Water Mass Distribution

2024
By Schultz, Cristina ; Dunne, John P. ; Liu, Xiao ; ...
Source: Journal of Geophysical Research: Oceans, 129(2)

[PDF-3.04 MB]

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Journal Title:

Journal of Geophysical Research: Oceans
Personal Author:

Schultz, Cristina ; Dunne, John P. ; Liu, Xiao ; Drenkard, Elizabeth ; Carter, Brendan

Schultz, Cristina ; Dunne, John P. ; Liu, Xiao ; Drenkard, Elizabeth ; Carter, Brendan Less -
NOAA Program & Office:

NWS (National Weather Service) ; OAR (Oceanic and Atmospheric Research) ; CICOES (Cooperative Institute for Climate, Ocean and Ecosystem Studies) ; EMC (Environmental Modelling Center) ; GFDL (Geophysical Fluid Dynamics Laboratory) ; ... More +

NWS (National Weather Service) ; OAR (Oceanic and Atmospheric Research) ; CICOES (Cooperative Institute for Climate, Ocean and Ecosystem Studies) ; EMC (Environmental Modelling Center) ; GFDL (Geophysical Fluid Dynamics Laboratory) ; NCEP (National Centers for Environmental Prediction) ; PMEL (Pacific Marine Environmental Laboratory) Less -
Description:

The california current system (CCS) supports a wide array of ecosystem services with hypoxia historically occurring in near‐bottom waters. Limited open ocean data coverage hinders the mechanistic understanding of CCS oxygen variability. By comparing three different models with varying horizontal resolutions, we found that dissolved oxygen (DO) anomalies in the CCS are propagated from shallower coastal areas to the deeper open ocean, where they are advected at a density and velocity consistent with basin‐scale circulation. Since DO decreases have been linked to water mass redistribution in the CCS, we conduct a water mass analysis on two of the models and on biogeochemical Argo floats that sampled multiple seasonal cycles. We found that high variability in biogeochemical variables (DO and nutrients) seen in regions of low variability of temperature and salinity could be linked to water mass mixing, as some of the water masses considered had higher gradients in biogeochemical variables compared to physical variables. Additional DO observations are needed, therefore, to further understand circulation changes in the CCS. We suggest that increased DO sampling north of 35˚N and near the shelf break would benefit model initialization and skill assessment, as well as allow for better assessment of the role of equatorial waters in driving DO in the northern CCS.
Source:

Journal of Geophysical Research: Oceans, 129(2)
DOI:

https://doi.org/10.1029/2023jc020000
ISSN:

2169-9275;2169-9291;
Format:

pdf
Publisher:

American Geophysical Union (AGU)
Document Type:

Journal Article
Funding:

Grant no. NA21OAR4310251
License:

https://creativecommons.org/licenses/by-nc-nd/4.0/
Rights Information:

CC BY-NC-ND
Compliance:

Library
Main Document Checksum:

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urn:sha-512:430713dd1806144f401ff8549560decf58ea2904db453f19cfaa602d2a8cbb8e35fd7b0384fd7ff873efe2042199410cbbf4cc69dad1a5892e6e0c63f0fa0011
Download URL:

https://repository.library.noaa.gov/view/noaa/67910/noaa_67910_DS1.pdf
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Characterizing Subsurface Oxygen Variability in the California Current System (CCS) and Its Links to Water Mass Distribution

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