南海溶解氧通量的初步研究  

A STUDY ON THE DISSOLVED OXYGEN FLUX IN THE SOUTH CHINA SEA

作　　者：林洪瑛[1] 韩舞鹰[1] 

机构地区：[1]中国科学院南海海洋研究所,广州510301

出　　处：《海洋与湖沼》1998年第1期61-66,共6页Oceanologia Et Limnologia Sinica

基　　金：国家自然科学基金!49176274;"八五"国家科技攻关项目!85-927-04

摘　　要：根据南海1984－1994年的观测资料，采用箱式模型，计算溶解氧在南海三箱子的各通量值，并建立起南海溶解氧的通量模型。结果表明，南海溶解氧的总输入通量为280．4×104mol／s，其中通过外洋输入的氧量占总输入氧量的49．2％；生物光合作用释放的氧量占总输入氧量的30．3％；降雨输入的氧量占总输入氧量的3．0％；河流输入的氧量占总输入氧量的0．4％；通过海气界面向海洋输入的氧量占南海总输入氧量的17．0％。The material flux in the ocean is one of the important factors to determine the structureand funtion of the marine ecosystem. The content of dissolved oxygen in sea water is influenced bythe organisms, currents, temperature and oxidation; hence, it is of great significance to quantitativelystudy the dissolved oxygen flux in sea water, for identifying more related material cycles.According to the depth, the South China Sea can be divided into three boxes by a pycnoclineand a sill. The upper homgeneous layer with 0-50m depth is taken as Box I; the 50m depth ischaracterised by the pycnocline. Box II lies between 50m and 2000m. Below 2000m is the deepbasin wator referred to as Box III. Based on the box model, and using the deta of the amounts ofparticulate phosphorus in Box I, Box II and Box III, the consumption fluxes of dissolved oxygenhave been caiculated to be 4,4 × 1010μmol / s in Box I; 78.3 × 1010μmol / s in Box II, and 0.55 ×1010μmol / s in Box III. Mianwhile, the average rate of oxygen consumption and has been estimatedto be 2.5 × 1010μmol / (dm3. s) in Box I; 1.8 × 1010μmol / (dm3 s) in Box II;0.033 × 10-7μmol /(dm3 s) in Box III. The value for Box III is very to close that calculated using a vettical shift-eddymix model, based upon the vertical distribution patterns of the potential temperature and thedissolved oxygen content.Using the equations of mass conservation for dissolved oxygen, incorporating the data setsobtained in 1984-1994, the fluxes of dissolved oxygen in Box I, Box II and Box III have beencalculated; the box model of dissolved oxygen in the South Chna Sea has been estabished.The total input flux of oxygen in the South Chna Sea is calculated to be 280.4 × 104mol / s,of which 49.2% is from the adacent oceans, 30.3% is derived from organism photosynthesis, 3.0%is from the rainfall, 0.4% is from the river water, and 17.0% is due to the interaction at the air-seainterface.

关 键 词：南海 溶解氧 通量 消耗率 

分 类 号：P734.45[天文地球—海洋化学]