EAGER: Collaborative Research: Using Available Sentry AUV aboard R/V Atlantis to Measure Hydrothermal Heat Flux at Axial and Main Endeavour Fields

这个项目利用现有的AUV哨兵和R/V Atlantis的时间来实施和测试新的方法来量化深海热液喷口的热量和流体通量。将获得安装在AUV上的同时的流速和温度梯度测量，并将使用对车辆运动的修正来计算围绕已知排气口的控制体积的进出流量。在Juan de Fuca山脊的Main Endeavour领域，控制量估计将与2000年FlowMow的结果进行比较，以更好地界定扩散流的贡献。在轴心火山的灰烬热液场，在5米高的一系列测量将有助于测试从AUV中测量扩散流的新方法。这些接近底部的测量将通过为另一个项目部署的相机系统提供的漫射和聚焦流动的直接测量来验证和合成。同时测量热液流出物内不同尺度的热通量和湍流(非常接近底部，两侧控制体积为100米)是预期的结果。所开发的方法将为海洋学界提供新的能力，以量化在热液喷口以及可能在其他环境中使用AUV的通量，包括冷渗漏和天然或人工碳氢化合物泄漏。

ABSTRACTThis project leverages available AUV Sentry and R/V Atlantis time to implement and test new methods for quantifying heat and fluid fluxes at deep-sea hydrothermal vents. Simultaneous AUV-mounted flow velocity and temperature gradient measurements will be obtained and corrections for vehicle motion will be used to compute flux in/out of a control volume that surrounds the known venting. At Main Endeavour Field on the Juan de Fuca Ridge, the control volume estimates will be compared to the 2000 FlowMow results to better delimit contributions of diffuse flow. At Ashes hydrothermal field on Axial Volcano, a series of surveys at 5 m height will help test the new method for measuring diffuse flow from an AUV. These near-bottom measurements will be validated and synthesized with direct measurements of diffuse and focused flow provided by camera systems deployed for a separate project. Simultaneous measurement of different scales (very near-bottom and control volumes of 100'm on each side) of heat flux and turbulence within the hydrothermal effluent is an expected outcome. The method developed will provide the oceanographic community with new capabilities for quantifying fluxes with AUVs at hydrothermal vents and possibly in other environments as well, including cold seeps and natural or artificial hydrocarbon leaks.