Next Article in Journal
Does ESG Performance Enhance Firm Value? Evidence from Korea
Previous Article in Journal
Physical Activity and Academic Performance: The Mediating Effect of Self-Esteem and Depression
Article Menu
Issue 10 (October) cover image

Export Article

Open AccessArticle
Sustainability 2018, 10(10), 3634; https://doi.org/10.3390/su10103634

The Relationship between POC Export Efficiency and Primary Production: Opposite on the Shelf and Basin of the Northern South China Sea

1
College of Meteorology and Oceanography, National University of Defense Technology, Nanjing 211101, China
2
State Key Laboratory of Satellite Ocean Environment Dynamics, Second Institute of Oceanography, State Oceanic Administration, Hangzhou 310012, China
3
Ocean College, Zhejiang University, Zhoushan 316021, China
4
Department of Oceanography, National Sun Yat-sen University, Kaohsiung 80424, Taiwan
*
Author to whom correspondence should be addressed.
Received: 2 August 2018 / Revised: 5 October 2018 / Accepted: 8 October 2018 / Published: 11 October 2018
Full-Text   |   PDF [3534 KB, uploaded 11 October 2018]   |  

Abstract

Accurate estimation of particulate organic carbon (POC) export efficiency in the euphotic layer is essential to understand the efficiency of the ocean’s biological carbon pump, but field measurements are difficult to conduct and data are sparse. In this study, we investigated the relationship between POC sinking export efficiency and ocean net primary production (NPP) in the euphotic layer of the northern South China Sea (NSCS), with the help of high spatiotemporal coverage satellite-derived NPP. Annual mean POC export efficiency in euphotic zone is 34% for the shelf areas and 24% for the basin of the NSCS in the context of satellite-derived 16-day-composited NPP. Similar to what is generally observed in the global ocean, the POC export efficiency on the shelf areas appears to be strengthened with the increase of NPP. However, in the basin areas, the opposite relationship is observed. That is, the POC export efficiency significantly decreases with the increase of NPP. Seasonal decoupling between NPP and POC export, phytoplankton size structure, grazing by zooplankton, and dissolved organic carbon export might account for the observed negative relationship between the POC export efficiency and NPP in the euphotic layer of basin region. System comparison between shelf and basin would be helpful to promote understanding of the regulation mechanism of POC export in the tropical marginal seas. View Full-Text
Keywords: POC export efficiency; ocean net primary production; satellite remote sensing; northern South China Sea POC export efficiency; ocean net primary production; satellite remote sensing; northern South China Sea
Figures

Figure 1

This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).
SciFeed

Share & Cite This Article

MDPI and ACS Style

Li, T.; Bai, Y.; He, X.; Chen, X.; Chen, C.-T.A.; Tao, B.; Pan, D.; Zhang, X. The Relationship between POC Export Efficiency and Primary Production: Opposite on the Shelf and Basin of the Northern South China Sea. Sustainability 2018, 10, 3634.

Show more citation formats Show less citations formats

Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Related Articles

Article Metrics

Article Access Statistics

1

Comments

[Return to top]
Sustainability EISSN 2071-1050 Published by MDPI AG, Basel, Switzerland RSS E-Mail Table of Contents Alert
Back to Top