On the Transverse Circulation in a Coastal Plain Estuary

9529806 瓦莱莱文森 在这个项目中，PI将研究在沿海平原河口，特别是在弗吉尼亚州的詹姆斯河河口的横向流动的动力学。 将采用声学多普勒海流剖面仪和CTD在春潮和小潮两个潮汐周期期间进行的高空间分辨率测量值的两个平行断面。 此外，还将在两个断面的每一个断面上安装三个流速计系泊装置，并在两个断面之间的河口两侧安装两个海底压力记录仪，进行高时间分辨率的测量。三个不同的动力机制，在一年中，即，高河流流量（5月），低河流流量（8月），和最弱的垂直分层（10月）。 一些目标有关的横向环流将得到解决，最终在横向动量平衡的主要条款的评价，无论是从观测和数值模式。

9529806 Valle-Levinson In this project, the PIs will study the dynamics of transverse flow in a coastal plain estuary, specifically the James River estuary in Virginia. Two parallel transects with high spatial resolution measurements will be occupied, using an Acoustic Doppler Current Profiler, and CTD casts during two tidal cycles on spring and neap tides. In addition, high temporal resolution measurements will be made with three current meter moorings at each one of the two transects and two bottom pressure recorders at either side of the estuary between the two transects. Three different dynamical regimes in the year will be addressed, namely, high river discharge (May), low river discharge (August), and the weakest vertical stratification (October). A number of objectives relating to the transverse circulation will be addressed, culminating in an evaluation of the dominant terms in the transverse momentum balance, both from the observations and from a numerical model.