东海沉积物—海水界面营养盐交换通量的初步研究  

Benthic flux of dissolved nutrients at the sediment-water interface in the East China Sea

作　　者：石峰[1] 王修林[1] 石晓勇[1] 张传松[1] 蒋凤华[1] 祝陈坚[1] 李克强[1] 

机构地区：[1]中国海洋大学化学化工学院,山东青岛266003

出　　处：《海洋环境科学》2004年第1期5-8,共4页Marine Environmental Science

基　　金：973国家重点基础研究发展规划项目(001CB409703);国家自然科学基金(40136020和49976027);教育部重点基金(01110);山东省基金(L2000E01);青岛市绿色奥运(200117 3(2))。

摘　　要：用实验室模拟法研究了2002年4月30日～5月17日和2002年8月26日～9月10日东海两个航次硅、磷、氮营养盐12个站位沉积物—海水界面上的交换通量,采用连续函数拟合的方法计算了营养盐界面交换速率。结果表明,春、夏季SiO3 Si在东海沉积物—海水界面上均表现为由沉积物向水体的转移,平均交换速率为4.12mmol/m2·d。PO4 P、NH4 N、NO2 N和NO3 N则随站位的不同有一定的差异,平均交换速率分别为-0.01、0.48、-0.02和-0.07mmol/m2·d。平均两个航次的结果,SiO3 Si、PO4 P、溶解无机氮(DIN)在东海沉积物—海水界面上的交换通量分别为3.18×1012、-7.37×109和2.95×1011mmol/d,可提供维持东海初级生产力SiO3 Si的55%、DIN的5.1%。Intact sediment cores were sampled at 12 sites in the East China Sea from April to May and August to September in 2002. In the (laboratory) incubation experiments, benthic fluxes of nutrients at the sediment-water interface were measured. A function method with (dependence) of the exchange rate was developed. Ih the function method, the average exchange rates of SiO_3-Si, PO_4-P, NH_4-N, NO_2-N and NO_3-N at the sediment-water interface were calculated, being 4.12, -0.01、0.48、-0.02和-0.07 mmol·m^(-2)·d^(-1) respectively. By (considering) the area percentage of different pattern out of the total area of the East China Sea, the fluxes of SiO_3-Si, PO_4-P and DIN from the sediments to seawater in the East China Sea were estimated 3.18×10^(12), -7.37×10~9 and 2.95×10^(11) mmol·d^(-1) respectively. The exchange (fluxes) can provide 55% of silicate and 5.1% of dissolved inorganic nitrogen required by phytoplankton in the East China Sea.

关 键 词：东海 沉积物-海水界面 营养盐 交换速率 交换通量 生物地球化学 

分 类 号：P736.4[天文地球—海洋地质]