论文部分内容阅读
在1984—1985年4个不同季节的航次期间,春、夏季在东海陆架近岸区观测到了第一亚硝酸盐最大值(Primary Nitrite Maximum——PNM)现象,其位置与生物(浮游植物)、物理(光)和化学(硝酸盐、铵)参数相关.在两个航次各20多份分了层的水体垂直分布图中,有的站铵浓度低于0.1μg at./1仪器检出限,PNM位于水深10—40m深度范围[光照度为3—25％表层光合作用有效幅照度(Photosynthetically Available Radiation——PAR)],因此,硝酸盐是仅有的有利于亚硝酸盐形成的氮源;有的站铵显示了紧靠PNM上方有较大值的垂直分布图形,这种PNM位于10—70m深度范围(光照度低于3％表层PAR),铵的氧化作用可能是观测到的亚硝酸盐的来源.文章对以硝酸盐为亚硝酸盐形成氮源的生物活化机制进行了探讨.
During the voyages of 4 different seasons from 1984 to 1985, the primary Nitrite Maximum (PNM) phenomenon was observed in the nearshore area of the East China Sea shelf in spring and summer. Its location is closely related to the biological (phytoplankton) The physical (light) and chemical (nitrate, ammonium) parameters are relevant.At the vertical distribution of the water bodies in more than 20 sub-layers over the two voyages, some of the ammonium concentrations in the stations are below 0.1 μg at./1 Instrument Detection Limit , The PNM is located in the depth of 10-40m [Illumination is 3-25%]; therefore, nitrate is the only nitrogen source that favors the formation of nitrite; Some ammonium stands showed a vertical profile with a larger value immediately above the PNM. This PNM is located in the 10-70m depth range (illumination is below 3% surface PAR) and ammonium oxidation may be observed for nitrite .This paper discussed the biological activation mechanism of nitrite as nitrite source.