摘要
基于LEVITUS94季节平均资料(7—9月,10—12月),对南黄海上层水体水质特征和影响因素进行了探讨。结果表明:(1)无论0 m还是10 m层,7—9月平均盐度值均低于32,10—12月平均盐度值最高可达32.8,出现在东南部的深水区,由东南向西北递减。7—9月南黄海西南部,受长江冲淡水的影响较大,其在0 m层的分布范围明显大于10 m层。(2)溶解氧体积分数呈现由北向南递减趋势,DO季节变化规律明显,7—9月平均体积分数小于10—12月。(3)表观耗氧量分布季节变化明显,7—9月平均体积分数低于10—12月,同时下层体积分数明显高于上层。从空间分布可以看出,夏季西南部海域上层受长江冲淡水影响明显,秋冬季节东南部海域受黄海冷水团减弱的影响较明显。
The characteristics of the upper layer water quality at south yellow sea （SYS） and the influence factors therein were analyzed based on the seasonal average data from LEVITUS94. Results show that： （1） the average salinity at zero and 10-meter layers is lower than 32 from July to September, and higher than 32.8 from October to December at the deep water of southeast SYS. The salinity decreases gradually from the southeast to northeast, and from July to September, the effective area at the zero-me- ter layer becomes clearly more than that at the 10-meter layer because of the diluted water from the Yangtze River at the southwest of SYS. （2） Dissolved oxygen （DO） becomes lower from the north to the south, which has an obvious seasonal change. The mean DO concentration from July to September is lower than that from October to December. （3） The concentration of apparent oxygen utilization （AOU）, which has a seasonal distribution characteristic, is lower from July to September than that from October to December. The concentration at the lower layers is higher than that at the upper layers. Meanwhile, space distribution shows that the diluted water of the Yangtze River has a clear effect at the southwest of SYS in summer and the cold water of YS has an obvious effect at the southeast of SYS in autumn and winter.
出处
《淮海工学院学报（自然科学版）》
CAS
2010年第3期84-88,共5页
Journal of Huaihai Institute of Technology:Natural Sciences Edition
基金
淮海工学院科研基金资助项目(KK06042)
关键词
水质
季节特征
表观耗氧量
water quality
seasonal characteristics
apparent oxygen utilization
