Drivers of Subsurface Deoxygenation in the Southern California Current System

Evans, Natalya; Schroeder, Isaac D.; Pozo Buil, Mercedes; Jacox, Michael G.; Bograd, Steven J.

doi:10.1029/2020gl089274

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i

Drivers of Subsurface Deoxygenation in the Southern California Current System

2020
By Evans, Natalya ; Schroeder, Isaac D. ; Pozo Buil, Mercedes ; ...
Source: Geophysical Research Letters, 47(21)

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Details:

Journal Title:

Geophysical Research Letters
Personal Author:

Evans, Natalya ; Schroeder, Isaac D. ; Pozo Buil, Mercedes ; Jacox, Michael G. ; Bograd, Steven J.

Evans, Natalya ; Schroeder, Isaac D. ; Pozo Buil, Mercedes ; Jacox, Michael G. ; Bograd, Steven J. Less -
NOAA Program & Office:

NMFS (National Marine Fisheries Service) ; OAR (Oceanic and Atmospheric Research) ; ESRL (Earth System Research Laboratory) ; PSL (Physical Sciences Laboratory) ; SWFSC (Southwest Fisheries Science Center)

NMFS (National Marine Fisheries Service) ; OAR (Oceanic and Atmospheric Research) ; ESRL (Earth System Research Laboratory) ; PSL (Physical Sciences Laboratory) ; SWFSC (Southwest Fisheries Science Center) Less -
Description:

A con ﬂuence of subarctic, tropical, and subtropical water masses feed the California Current System (CCS), supporting a highly productive ecosystem and wide array of marine ecosystem services.Long ‐term declines in oxygen have been observed in this region, causing habitat compression and other ecosystem consequences. Here we quantify the water masses and processes causing deoxygenation in the subsurface CCS from 1993 –2018, and we ﬁnd that deoxygenation was caused both by changes in the advection of source waters and increased remineralization in the source waters. The historical deoxygenation trend can be attributed primarily (81%) to the Northern Equatorial Paci ﬁc Intermediate Water, the deep Paci ﬁc Equatorial Water mass transported in the California Undercurrent. We also ﬁnd that
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General Earth And Planetary Sciences Geophysics
Source:

Geophysical Research Letters, 47(21)
DOI:

https://doi.org/10.1029/2020gl089274
ISSN:

0094-8276;1944-8007;
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PDF
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American Geophysical Union (AGU)
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Journal Article
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urn:sha256:a20829e619cfc41bc0fbf7c716982da6e5219e1e23a9d23ea9560a32efb7f6e9
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https://repository.library.noaa.gov/view/noaa/53082/noaa_53082_DS1.pdf
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[PDF-2.03 MB]

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