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

该项目利用AUV Sentry和R/V Atlantis的可用时间，实施和测试量化深海热液喷口热量和流体通量的新方法。将同时获得安装在AUV上的流速和温度梯度测量值，并将使用飞行器运动校正值来计算已知通风口周围控制体积的流入/流出通量。在胡安·德富卡海岭的主奋进油田，控制量估计值将与2000年FlowMow结果进行比较，以更好地界定扩散流的贡献。在Axial火山的Ashes热液场，在5米高度进行的一系列调查将有助于测试测量AUV扩散流的新方法。这些近底测量值将与为单独项目部署的摄像机系统提供的扩散和聚焦流的直接测量值进行验证和合成。同时测量不同的尺度（非常接近底部和100？5 m控制体积）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新的能力，以便用自动潜航器在热液喷口以及可能在其他环境中，包括冷泉和天然或人工碳氢化合物泄漏处量化通量。

This 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 100?s m control volumes) of heat flux and turbulence within the hydrothermal effluent is an expected outcome. The methods 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.