CO(2) uptake in the East China Sea relying on Changjiang runoff is prone to change

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Title:	CO(2) uptake in the East China Sea relying on Changjiang runoff is prone to change
Authors:	Tseng,CM;Liu,KK;Gong,GC;Shen,PY;Cai,WJ
Contributors:	水文與海洋科學研究所
Keywords:	3 GORGES DAM;SEASONAL-VARIATIONS;YANGTZE-RIVER;CONTINENTAL-SHELF;ATMOSPHERIC CO2;CARBON-DIOXIDE;OCEAN MARGINS;DISCHARGE;HYPOXIA;CIRCULATION
Date:	2011
Issue Date:	2012-03-27 17:33:46 (UTC+8)
Publisher:	國立中央大學
Abstract:	Limited knowledge exists concerning the unusually large CO(2) uptake capacity in the East China Sea (ECS), which is the eminent continental shelf pump for efficient transfer of atmospheric CO(2) to the deep ocean. Here we show evidence of strong control of river runoff on the CO(2) uptake capacity of the ECS. From 8-years of observations in the productive ECS shelf, we present the first dataset to show the complete seasonal cycle of CO(2) flux, which gives an annual flux of 2.3 +/- 0.4 mol C m(-2) y(-1) as a net sink of atmospheric CO(2). Further, we found biological sequestration of CO(2) taking place in the highly productive Changjiang river plume in warm seasons due to the riverine nutrient enrichment. Consequently, changes in the plume area due to changes in the Changjiang River Discharge (referred to as the Discharge hereafter) strongly affect the CO(2) uptake capacity. As the Discharge may decrease due to the Three Gorges Dam operation, the Changjiang plume will probably also decrease, resulting in reduction in CO(2) uptake capacity and even a shift from a CO(2) sink to a source. Citation: Tseng, C.-M., K.-K. Liu, G.-C. Gong, P.-Y. Shen, and W.-J. Cai (2011), CO2 uptake in the East China Sea relying on Changjiang runoff is prone to change, Geophys. Res. Lett., 38, L24609, doi: 10.1029/2011GL049774.
Relation:	GEOPHYSICAL RESEARCH LETTERS
Appears in Collections:	[Graduate Institute of Hydrological and Oceanic Sciences] journal & Dissertation

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