WAMSI Node 6.2 - The Impact of tides and internal waves on offshore engineering - field measurement program - 70 km NW of North Rankin platform

The IWAG (Internal Wave Boundary layer Generation) instrument was deployed from October 23, 2008 to November 11th, 2008, on the NWS offshore from North Rankin A (NRA) in 420 metres of water.

The field experiment involved the deployment of 29 moored Seabird temperature sensors (SBE39), 1 Seabird conductivity-temperature-pressure sensor (SBE37-CTD), as well as 5 Nortek Acoustic Doppler Velocity meters (ADV) to observe differences in BBL properties during the 14 day spring-neap tidal cycle.

The 5 ADV’s measure velocities at a point in space in all three spatial directions and pressure at frequencies up to 64Hz. The ADVs were each synchronized with a co-located temperature sensor, permitting the calculation of turbulent heat fluxes in addition to a multitude of other turbulent properties.

Vertical extent was between 390 metres and 420 metres below Mean Sea Level.

IWAG（内波边界层生成，Internal Wave Boundary layer Generation）仪器于2008年10月23日至2008年11月11日期间，部署于北兰金卡（North Rankin A，简称NRA）附近的西北陆架离岸海域，作业水深为420米。
本次野外实验共部署29台锚定式Seabird SBE39型温度传感器、1台Seabird SBE37-CTD型电导-温度-压力传感器，以及5台Nortek声学多普勒流速仪（Acoustic Doppler Velocimeter，ADV），用于观测14天大小潮周期内的底边界层（Bottom Boundary Layer，BBL）特性变化。
5台ADV可在空间单点处测量三维流速，并以最高64Hz的频率采集压力数据。每台ADV均与同站位的温度传感器实现同步，因此除可计算多项湍流特性外，还可求解湍流热通量。
本次观测的垂直覆盖范围介于平均海平面以下390米至420米之间。