Abdelrhman Mohamed A
U. S. EPA Office of Research and Development.
Estuaries Coast. 2017 Jul;40(4):994-1012. doi: 10.1007/s12237-016-0206-x.
In Narragansett Bay, light attenuation by total suspended sediments (TSS), colored dissolved organic matter (CDOM), and phytoplankton chlorophyll-a (chl-a) pigment is 129%, 97%, and 70%, respectively, of that by pure seawater. Spatial distribution of light attenuation indicates higher values in the upper Bay, where rivers with sediment and nutrient-rich waters enter and elevate TSS, CDOM, and chl-a concentrations. The temporal trends of light attenuation during the summer months (July-August) differed at various locations in the Bay, having the highest values in July. For the same period, spectral methods overestimated attenuation throughout the Bay. These findings quantify the behavior of light attenuation in space and time, providing information that can guide decisions related to improving water clarity and help understanding the effects of various environmental and management scenarios on it.
在纳拉甘西特湾，总悬浮沉积物（TSS）、有色溶解有机物（CDOM）和浮游植物叶绿素a（chl-a）色素造成的光衰减分别是纯海水的129%、97%和70%。光衰减的空间分布表明，在上游湾区光衰减值较高，那里有携带沉积物且富含营养物质的河流汇入，从而提高了TSS、CDOM和chl-a的浓度。夏季（7月至8月）期间，湾区不同地点的光衰减时间趋势有所不同，7月的值最高。在同一时期，光谱方法高估了整个湾区的光衰减。这些发现量化了光衰减在空间和时间上的行为，提供了可指导改善水体透明度相关决策的信息，并有助于理解各种环境和管理情景对其的影响。
