Riverine inputs of total organic carbon and suspended particulate matter from the Pearl River Delta to the coastal ocean off South China

被引：154
|
作者：
Ni, Hong-Gang [1 ,3 ]
Lu, Feng-Hui [1 ,3 ]
Luo, Xian-Lin [2 ]
Tian, Hui-Yu [4 ]
Zeng, Eddy Y. [1 ]
机构：
[1] Chinese Acad Sci, Guangzhou Inst Geochem, State Key Lab Organ Geochem, Guangzhou 510640, Guangdong, Peoples R China
[2] Sun Yat Sen Univ, Sch Geog & Planning, Guangzhou 510275, Guangdong, Peoples R China
[3] Chinese Acad Sci, Grad Sch, Beijing 100049, Peoples R China
[4] Guangzhou Maritime Coll, Dept Nav, Guangzhou 510725, Guangdong, Peoples R China
来源：
MARINE POLLUTION BULLETIN | 2008年 / 56卷 / 06期
基金：
中国国家自然科学基金;
关键词：
riverine input; suspended particulate matter; total organic carbon; global ocean; South China;
D O I：
10.1016/j.marpolbul.2008.02.030
中图分类号：
X [环境科学、安全科学];
学科分类号：
08 ; 0830 ;
摘要：
A total of 1008 samples were collected from the eight major riverine runoff outlets in the Pearl River Delta (PRD) during 2005-2006 to estimate the fluxes of total organic carbon (TOC) to the coastal ocean off South China. The average dissolved organic carbon (DOC) concentration was 1.67 mg/L with a range of 1.38-2.13 mg/L. Concentrations of particulate organic carbon (POC) ranged from 2.66-4.12% of total suspended particulate matter (SPM). The fluxes of TOC and SPM from the PRD via the eight outlets were 9.2 x 10(5) and 2.5 x 10(7) tons/yr, respectively. Temporal variations in POC and DOC were observed at all outlets due to the large variability in runoff levels because of the seasonality of rainfall, and the riverine discharge amount was an important factor controlling TOC flux. The net contribution of organic carbon from the PRD to the coastal ocean represented approximately 0.1-0.2% of total organic carbon transported by rivers worldwide. (C) 2008 Elsevier Ltd. All rights reserved.
引用
收藏
页码：1150 / 1157
页数：8
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