Patricia Bay Gas Tension Device Deployed 2012-08-12

The Pro-Oceanus GTD 24-36-07 was deployed on 2012-08-12 at Patricia Bay. Patricia Bay is located in the Saanich Inlet, on the southern tip of Vancouver Island. This device is a Gas Tension Device. Gas Tension Device (GTD) instruments measure gas tension, or total dissolved gas pressure. The total dissolved gas pressure in seawater is the sum of the partial pressures of all dissolved gases. The GTD operates by equilibrating a small volume of air trapped behind a semi-permeable membrane that is resistant to seawater. When the air sample is isolated from hydrostatic pressure, the measured pressure is solely from the gases in the seawater. This internal pressure is measured using a very stable pressure sensor. It was deployed on a fixed platform. Data from this deployment were archived and made available through Ocean Networks Canada's Oceans 2.0 digital infrastructure, with quality assurance and derived data products following established practices.Pro-Oceanus GTD 24-36-07型设备于2012年8月12日部署于帕特里夏湾（Patricia Bay），该海湾坐落于温哥华岛南端的萨尼奇湾（Saanich Inlet）内。该设备属于气体张力装置（Gas Tension Device，缩写为GTD），此类仪器用于测量气体张力，即总溶解气体压力。海水中的总溶解气体压力为所有溶解气体的分压之和。GTD的工作原理为：将少量空气密封在抗海水的半透膜后方，待其与海水达到平衡；当该空气样本脱离静水压影响时，测得的压力仅来自海水中的溶解气体。该设备通过稳定性极佳的压力传感器测量该内部压力。本次部署采用固定式平台完成。本批次部署获取的数据已完成归档，并通过加拿大海洋网络（Ocean Networks Canada）的Oceans 2.0数字基础设施对外公开；相关数据的质量管控及衍生数据产品均遵循既定行业操作规范。