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

摘要本项目利用AUV哨兵号和R/V亚特兰蒂斯号的时间来实施和测试深海热液喷口热量和流体通量量化的新方法。同时，安装在水下航行器上的流速和温度梯度测量将得到，并且车辆运动的修正将用于计算进出已知通风口周围控制体积的通量。在Juan de Fuca Ridge的Main Endeavour油田，控制体积估算值将与2000年FlowMow的结果进行比较，以更好地划分扩散流的贡献。在轴向火山的灰烬热液区，一系列5米高度的测量将有助于测试测量AUV漫流的新方法。这些近底部的测量结果将与由单独项目部署的摄像系统提供的漫射和聚焦流的直接测量结果进行验证和综合。同时测量不同尺度（非常接近底部，每侧控制体积为100米）热液流出物中的热通量和湍流是预期的结果。所开发的方法将为海洋学界提供在热液喷口以及可能在其他环境（包括冷渗漏和天然或人工碳氢化合物泄漏）中使用auv量化通量的新能力。

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.