Suppressed CO2 Outgassing by an Enhanced Biological Pump in the Eastern Tropical Pacific SCIE SCOPUS

Cited 2 time in WEB OF SCIENCE Cited 2 time in Scopus
Title
Suppressed CO2 Outgassing by an Enhanced Biological Pump in the Eastern Tropical Pacific
Author(s)
Kim, Hyung Jeek; Kim, Tae-Wook; Hyeong, Kiseong; Yeh, Sang-Wook; Park, Jong-Yeon; Yoo, Chan Min; Hwang, Jeomshik
KIOST Author(s)
Kim, Hyung Jeek(김형직)Hyeong, Kiseong(형기성)Yoo, Chan Min(유찬민)
Publication Year
2019-11
Abstract
The Eastern Tropical Pacific (ETP) is the largest oceanic source of carbon dioxide (CO2) to the atmosphere. Sinking particle fluxes at a depth of 4,950 m (50 m above the seafloor) in the ETP were monitored from 2003 to 2013, during which the Pacific decadal oscillation (PDO) shifted from a positive to negative phase. We show a disproportionate increase in the efficiency of the biological pump in this region relative to the increase in primary production that occurred during La Nina years following the shift of the PDO in 2008. Biogenic carbon export from the surface mixed layer was estimated from the observed particulate organic carbon and inorganic carbon fluxes at a depth of 4,950 m and from empirical equations of the vertical attenuation of carbon flux. Enhanced biological carbon export accounted for 2.3-5.5 mol C m(-2) year(-1) during the La Nina events. Despite a large uncertainty associated with these estimates, we propose that CO2 outgassing was largely suppressed by an enhanced biological pump during the La Nina events in the negative PDO phase.
ISSN
2169-9275
URI
https://sciwatch.kiost.ac.kr/handle/2020.kiost/476
DOI
10.1029/2019JC015287
Bibliographic Citation
JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS, v.124, no.11, pp.7962 - 7973, 2019
Publisher
AMER GEOPHYSICAL UNION
Keywords
sinking particle; biological pump; sediment trap; ENSO; Pacific decadal oscillation; Eastern Tropical Pacific
Type
Article
Language
English
Document Type
Article; Early Access
Publisher
AMER GEOPHYSICAL UNION
Related Researcher
Research Interests

Particle flux,Carbon cycle,Climate Change,입자 플럭스,탄소순환,기후변화

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