Environment and Life Sciences Research Center, Kuwait Institute for Scientific Research, P.O. Box 1638, Salmiya 22017, Kuwait.
Environment and Life Sciences Research Center, Kuwait Institute for Scientific Research, P.O. Box 1638, Salmiya 22017, Kuwait.
Mar Pollut Bull. 2018 Apr;129(1):35-42. doi: 10.1016/j.marpolbul.2018.02.013. Epub 2018 Feb 10.
Measurements of total organic carbon (TOC) for two years in Kuwaiti waters showed high TOC levels (101.0-318.4, mean 161.2 μM) with maximal concentrations occurring within the polluted Kuwait Bay and decreasing offshore, indicating substantial anthropogenic component. Analysis of winter-time data revealed a large increase in density over the past four decades due to decrease in Shatt Al-Arab runoff, implying that the dissolved/suspended organic matter in surface waters of the northern Gulf could be quickly injected into the Gulf Deep Water (GDW). Our measurements together with an analysis of previously collected/published data suggest that the recent summer-time declining trend in oxygen in the GDW might be related to eutrophication. Higher preformed TOC and lower preformed dissolved oxygen contents of the high-salinity water mass that flows out of the Gulf and ventilates the mesopelagic oxygen minimum zone (OMZ) of the Northwestern Indian Ocean may cause expansion/intensification of the regional OMZ.
对科威特水域两年的总有机碳 (TOC) 的测量显示，TOC 水平很高（101.0-318.4，平均值 161.2µM），最大浓度出现在污染的科威特湾内，并向近海减少，表明存在大量人为因素。对冬季数据的分析表明，由于 Shatt Al-Arab 径流量减少，过去四十年中密度大幅增加，这意味着北部海湾的地表水的溶解/悬浮有机物可能会迅速注入 Gulf Deep Water (GDW)。我们的测量结果以及对以前收集/发表的数据的分析表明，GDW 中最近夏季氧气的下降趋势可能与富营养化有关。从海湾流出并通风西北印度洋中层缺氧区的高盐度水体中较高的预形成 TOC 和较低的预形成溶解氧含量可能导致该地区缺氧区的扩张/加剧。
