渤海近岸水体有色溶解有机物的光吸收特征及其分布

发布时间：2018-06-02 16:45

本文选题：渤海 + 有色溶解有机物(CDOM)　；参考：《海洋科学进展》2016年01期

【摘要】：依据2011-08和2012-05的现场调查资料,分析渤海水体有色溶解有机物(CDOM)的光谱吸收特性,研究其分布变化特征及影响因素。结果表明:渤海水体a_(355)的变化范围为0.38~4.15m~(-1),均值为1.33m~(-1),表现为莱州湾渤海湾辽东湾,春季夏季的时空变化特征;表层海水a_(355)的水平分布基本呈近岸及河口区高、远岸稍低的变化规律。光谱斜率S_(275~295)和S_(350~400)的变化范围分别为0.011~0.074nm~(-1)和0.012~0.195nm~(-1),春季整体高于夏季。光谱斜率比S_R的变化范围为0.25~2.25,平均值为0.88,夏季略高于春季,其中春季渤海湾最高,莱州湾次之,辽东湾最低;夏季则莱州湾高于渤海湾。渤海春季水体CDOM主要来源于生物现场生产和底层沉积物再悬浮释放,夏季则主要受陆源径流输入的影响。不同时空条件下CDOM在咸淡水的混合过程中也有着不同的表现,春季多呈非保守行为;夏季莱州湾呈保守行为,渤海湾则呈非保守行为。
[Abstract]:Based on the field investigation data of 2011-08 and 2012-05, the spectral absorption characteristics of CDOM in Bohai Sea were analyzed, and the distribution and variation characteristics of CDOM and its influencing factors were studied. The results show that the range of variation of sea water in Bohai Sea is 0.38 ~ 4.15 m ~ (-1) and the average value is 1.33 m ~ (-1), which shows the temporal and spatial variation characteristics of Liaodong Bay in Laizhou Bay in spring and summer, and the horizontal distribution of surface sea water (a _ (35 ~ 5) is basically a regularity of high inshore and estuary area and slightly lower far shore. The range of spectral slope is 0.011 ~ 0.074 nm ~ (-1) and 0.012 ~ (0.195 nm ~ (-1) ~ (-1) respectively, which is higher in spring than in summer. The variation range of spectral slope ratio to SR is 0.25 ~ 2.25 and the average value is 0.88, which is slightly higher in summer than that in spring, in which the Bohai Bay is the highest in spring, the Laizhou Bay is the second, and the Liaodong Bay is the lowest, and in summer the Laizhou Bay is higher than the Bohai Bay. The CDOM of Bohai Sea water in spring is mainly derived from biological field production and resuspended release of bottom sediments, while in summer it is mainly affected by terrestrial runoff input. Under different time and space conditions, CDOM also showed different behavior in the mixing process of salt and fresh water, mostly non-conservative behavior in spring, conservative behavior in Laizhou Bay in summer and non-conservative behavior in Bohai Bay.
【作者单位】：国家海洋局第一海洋研究所;青岛海洋科学与技术国家实验室海洋生态与环境科学功能实验室;
【基金】：海洋公益性行业科研专项——海洋藻类和细菌固碳(储碳)能力和潜力评估技术研究(201105021)和滨海湿地固碳能力提升技术及应用示范(201205008)
【分类号】：P734.2

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