黄河口有机碳的时空输运特征及其影响因素分析

被引:28
作者
张龙军 [1 ]
张向上 [1 ]
王晓亮 [2 ]
刘立芳 [1 ]
机构
[1] 中国海洋大学海洋环境与生态教育部重点实验室
[2] 国家海洋局东海预报中心
关键词
黄河口; 有机碳; 溶解有机碳; 最大混浊带; 粒径;
D O I
10.14042/j.cnki.32.1309.2007.05.007
中图分类号
P343 [陆地水文学、水文地理学(水象学)];
学科分类号
081501 ;
摘要
通过2004年4月,2004年9月,2005年9月,2006年4月4个航次,结合2003年8月对河道感潮带的连续同步观测,对低流量下黄河口有机碳的输运特征进行了考察。结果发现:黄河输入至河口的悬浮物中颗粒有机碳(POC)含量约为0.51%,主要以陆源输入为主,几乎不受季节变化影响,由于大量POC含量低的陆源泥沙的稀释作用,浮游植物对总颗粒有机碳的贡献只有在悬浮物含量(TSS)<200 mg/L时才能显现出来;黄河口TSS超过455 mg/L时,有机碳入海以颗粒有机碳为主;反之,以溶解有机碳为主。黄河口悬浮物在低盐度区沉降作用前后的中值粒径降低,Φ>16μm的悬浮物的沉降作用比Φ<16μm的悬浮物更为剧烈,POC含量随悬浮物粒径的降低而升高,黄河携带的颗粒有机碳80%以上集中在Φ<16μm的TSS中;低流量下,黄河口最大混浊带对POC的过滤效率为65%,混浊带对POC的过滤效应能造成黄河口POC的有效通量被高估;由于受黄河口沉积物向水体解析DOC的影响,在盐度小于10时,DOC几乎不受海水稀释作用的影响,但在盐度大于10的区域DOC与盐度表现出良好的负相关关系,黄河口枯、丰水期淡水端溶解有机碳的有效浓度分别高于实测最高值20%和10%左右,从而造成黄河口DOC有效通量被低估。
引用
收藏
页码:674 / 682
页数:9
相关论文
共 12 条
[1]   Fluxes and sources of suspended organic matter in an estuarine turbidity maximum region during low discharge conditions [J].
Goni, MA ;
Cathey, MW ;
Kim, YH ;
Voulgaris, G .
ESTUARINE COASTAL AND SHELF SCIENCE, 2005, 63 (04) :683-700
[2]  
Xu-Chen Wang,Robert F Chen,George B Gardner.Sources and transport of dissolved and particulate organic carbon in the Mississippi River estuary and adjacent coastal waters of the northern Gulf of Mexico[J].Marine Chemistry,2004(1)
[3]   Behaviour of organic carbon in nine contrasting European estuaries [J].
Abril, G ;
Nogueira, M ;
Etcheber, H ;
Cabeçadas, G ;
Lemaire, E ;
Brogueira, MJ .
ESTUARINE COASTAL AND SHELF SCIENCE, 2002, 54 (02) :241-262
[4]   The chemical composition and cycling of particulate and macromolecular dissolved organic matter in temperate estuaries as revealed by molecular organic tracers [J].
Harvey, HR ;
Mannino, A .
ORGANIC GEOCHEMISTRY, 2001, 32 (04) :527-542
[5]  
Peter M.J Herman,Carlo H.R Heip.Biogeochemistry of the MAximum TURbidity Zone of Estuaries (MATURE): some conclusions[J].Journal of Marine Systems,1999(2)
[6]  
A.E.J. Miller.Seasonal Investigations of Dissolved Organic Carbon Dynamics in the Tamar Estuary, U.K[J].Estuarine, Coastal and Shelf Science,1999(6)
[7]   Biodegradation of riverine dissolved organic carbon in five estuaries of the southeastern United States [J].
Moran, MA ;
Sheldon, WM ;
Sheldon, JE .
ESTUARIES, 1999, 22 (01) :55-64
[8]   Seasonal variation and origin of Particulate Organic Carbon in the lower Garonne River at La Reole (southwestern France) [J].
E. Veyssy ;
H. Etcheber ;
R.G. Lin ;
P. Buat-Menard ;
E. Maneux .
Hydrobiologia, 1998, 391 :113-126
[9]  
J.I. Hedges,R.G. Keil,R. Benner.What happens to terrestrial organic matter in the ocean?[J].Organic Geochemistry,1997(5)
[10]  
P. Regnier,R. Wollast,C.I. Steefel.Long-term fluxes of reactive species in macrotidal estuaries: Estimates from a fully transient, multicomponent reaction-transport model[J].Marine Chemistry,1997(1)