Vertical Variation of the Particle Flux in the Eastern Tropical Pacific from 2009 to 2010

Hyung Jeek Kim; Sosul Cho; Dongseon Kim; Kyeong Hong Kim; Chan Min Yoo

doi:10.4217/OPR.2022020

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2022 Vol.44, Issue 3 Preview Page

Article

Vertical Variation of the Particle Flux in the Eastern Tropical Pacific from 2009 to 2010 동태평양 열대해역에서 2009–2010년 침강입자 플럭스의 수직 변화

30 September 2022. pp. 221-233

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Abstract

A sediment trap had been deployed at 1250 m depth in the Eastern Tropical Pacific (ETP) from September 2009 to July 2010, with the aim of understanding the temporal and vertical variability of particle flux. During the monitoring period, total particle flux varied from 12.4 to 101.0 mg m^-2day^-1, with the higher fluxes in January-March 2010. Biogenic particle flux varied in phase with the total particle flux. The increase in total particle flux during January-March 2010 was attributed to the enhanced biological production in the surface layer caused by wind-driven mixing in response to the seasonal shifts in the location of the Intertropical convergence zone. The export ratio (e-ratio) was estimated using the particulate organic carbon flux and satellite-derived net primary production data. The estimated e-ratios changed between 0.8% and 2.8% (1.4± 0.6% on average). The ratio recorded in the negative phase of Pacific decadal oscillation (PDO) was similar to the previous results obtained from the ETP during the 1992/93 periods in the positive phase of PDO. This suggests that the regime shift of the PDO is not related to the carbon export ratio.

Keywords

particle flux

carbon cycle

eastern tropical pacific

sediment trap

sinking particles

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Information

Publisher :Korea Institute of Ocean Science and Technology
Publisher(Ko) :한국해양과학기술원
Journal Title :Ocean and Polar Research
Journal Title(Ko) :Ocean and Polar Research
Volume : 44
No :3
Pages :221-233
Received Date : 2022-06-29
Revised Date : 2022-08-19
Accepted Date : 2022-09-07
DOI :https://doi.org/10.4217/OPR.2022020

Ocean and Polar Research ISSN:2234-7313(Online) Ocean and Polar Research

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