CAJ | 학술논문

基于 2006年7月18-23日对长江口东北部海域的大面调查资料,重点分析了该海域DO的分布特征,初步探讨了DO与温度、盐度、叶绿素和营养盐等各要素分布之间的关系.研究显示,2006年7月长江口东北部海域DO的质量浓度范围为1.36～8.81 mg/L,平均值为6.25 mg/L;调查海域(122°～123°E,32°～33°N)底层存在较为严重的DO亏损现象,表明长江口外DO低值区7月份在长江口东北部海域也存在一定程度的扩展;夏季台湾暖流北上引起的海水层化作用、表层生物繁殖引起的大量有机碎屑的沉降和氧化分解,可能是致使调查海域底层出现一定面积的DO低值区和DO亏损现象的2个主要原因.
기우 2006년7월18-23일대장강구동북부해역적대면조사자료,중점분석료해해역DO적분포특정,초보탐토료DO여온도、염도、협록소화영양염등각요소분포지간적관계.연구현시,2006년7월장강구동북부해역DO적질량농도범위위1.36～8.81 mg/L,평균치위6.25 mg/L;조사해역(122°～123°E,32°～33°N)저층존재교위엄중적DO우손현상,표명장강구외DO저치구7월빈재장강구동북부해역야존재일정정도적확전;하계태만난류북상인기적해수층화작용、표층생물번식인기적대량유궤쇄설적침강화양화분해,가능시치사조사해역저층출현일정면적적DO저치구화DO우손현상적2개주요원인.
Based on the data from the cruise carried out in the northeast sea of the Yangtze Estuary in July 18-23,2006,this paper is focused on the analysis of the distribution of dissolved oxygen(DO),and the preliminary discussion about the relationships of DO with the elements of temperature,salinity,chlorophyll-a and nutrients.The results show that in July,2006,DO mass concentrations in the northeast sea of the Yangtze Estuary ranged from 1.36 to 8.81 mg/L,with the mean value of 6.25 mg/L. Heavier hypoxia phenomenon was found in the bottom water (122°～123°E,32°～33°N),I.e. The low-oxygen area of the Yangtze Estuary became further spreaded in the northeast sea of the Yangtze Estuary in July. The water column stratification caused by the northward extension of Taiwan Warm carrent,the subsidence decomposition and oxidation of a large quantity of organic debris from biological reproduction in the surface water might be the main factors for the hypoxia in the bottom water of the surveyed sea.