Biological carbon pump efficiency enhanced by atmospheric dust deposition in the North Pacific Subtropical Gyre SCIE SCOPUS

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Title
Biological carbon pump efficiency enhanced by atmospheric dust deposition in the North Pacific Subtropical Gyre
Author(s)
Kim, Hyung Jeek; Kim, Dong Seon; Yoo, Chan Min; Park, Jong-Yeon; Jeong, Hyer Yeong; Hwang, Jeomshik
KIOST Author(s)
Kim, Hyung Jeek(김형직)Kim, Dong Seon(김동선)Yoo, Chan Min(유찬민)Jeong, Hyeryeong(정혜령)
Alternative Author(s)
김형직; 김동선; 유찬민; 정혜령
Publication Year
2021-12
Abstract
We examine the flux and composition of sinking particles collected at 4500 m depth in the southeastern part of the North Pacific Subtropical Gyre (NPSG) from August 2011 to June 2012. Satellite-derived net primary production was higher in January–May 2012 compared with the rest of the study period. Both the biogenic and lithogenic particle fluxes were significantly higher in spring (March–May 2012) than at other times. The export efficiency via the transfer of produced organic carbon to the deep ocean interior (i.e., carbon sequestration) doubled during this time. Two prominent particle flux peaks were observed in March and May 2012, coinciding with the atmospheric dust-deposition peaks within the temporal resolution of the data. Coincident increases in the biogenic and lithogenic particle fluxes suggest that dust deposition in the NPSG enhances the biological carbon-pump efficiency. Strong coupling between the particulate organic carbon and biogenic opal fluxes implies that nutrient supply via atmospheric dust deposition stimulated diatom growth in this area. Dust deposition during the productive season therefore plays an important role in carbon sequestration.
ISSN
0924-7963
URI
https://sciwatch.kiost.ac.kr/handle/2020.kiost/41605
DOI
10.1016/j.jmarsys.2021.103634
Bibliographic Citation
JOURNAL OF MARINE SYSTEMS, v.224, 2021
Publisher
Elsevier BV
Subject
BIOGENIC PARTICLE FLUXES; EQUATORIAL PACIFIC; SEASONAL-VARIATIONS; EAST-ASIA; EVENTS; OCEAN; IRON; VARIABILITY; PRODUCTIVITY; INTERIOR
Keywords
Atmospheric dust deposition; Sediment trap; Particle flux; Biological pump; North Pacific Subtropical Gyre
Type
Article
Language
English
Document Type
Article
Publisher
Elsevier BV
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