Biological Production of Distinct Carbon Pools Drives Particle Export Efficiency in the Southern Ocean

Huang, Yibin; Fassbender, Andrea J.

doi:10.1029/2023GL107511

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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

Biological Production of Distinct Carbon Pools Drives Particle Export Efficiency in the Southern Ocean

2024
By Huang, Yibin ; Fassbender, Andrea J.
Source: Geophysical Research Letters, 51(12)
Series: PMEL contribution; no. 5540

[PDF-1.71 MB]

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Journal Title:

Geophysical Research Letters
Personal Author:

Huang, Yibin ; Fassbender, Andrea J.

Huang, Yibin ; Fassbender, Andrea J. Less -
NOAA Program & Office:

OAR (Oceanic and Atmospheric Research) ; CIMAR (Cooperative Institute for Marine and Atmospheric Research) ; PMEL (Pacific Marine Environmental Laboratory)

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

We use observations from the Southern Ocean (SO) biogeochemical profiling float array to quantify the meridional pattern of particle export efficiency (PEeff) during the austral productive season. Float estimates reveal a pronounced latitudinal gradient of PEeff, which is quantitatively supported by a compilation of existing ship‐based measurements. Relying on complementary float‐based estimates of distinct carbon pools produced through biological activity, we find that PEeff peaks near the region of maximum particulate inorganic carbon sinking flux in the polar antarctic zone, where net primary production (NPP) is the lowest. Regions characterized by intermediate NPP and low PEeff, primarily in the subtropical and seasonal ice zones, are generally associated with a higher fraction of dissolved organic carbon production. Our study reveals the critical role of distinct biogenic carbon pool production in driving the latitudinal pattern of PEeff in the SO.
Source:

Geophysical Research Letters, 51(12)
Series:

PMEL contribution; no. 5540
DOI:

https://doi.org/10.1029/2023GL107511
ISSN:

0094-8276;1944-8007;
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PDF
Publisher:

American Geophysical Union (AGU)
Document Type:

Journal Article
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https://creativecommons.org/licenses/by/4.0/
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CC BY
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Submitted
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urn:sha-512:cfe499d8ff72fca0593f5c910acae9fff37c298a377e939b3f96799815c0ed2a8bfd3c00417f880132bf8eb6b775a45d67b67ac5f3702e7c59c4bd8f25ecacf8
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Biological Production of Distinct Carbon Pools Drives Particle Export Efficiency in the Southern Ocean

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