Horizontal Profiles of Upper Ocean Temperature and Salinity During ANZFLUX

9317020莫里森拟议的工作是对东部韦德尔海上层混合层的海洋结构进行综合研究计划(“AnzFlux”)的一部分。它将于1994年南冬从RVIB纳撒尼尔·B·帕尔默进行。这里提出的工作是对温度和盐度的水平变率进行高分辨率测量，以帮助确定相干对流特征的三维结构。测量将使用遥控自由航行器(自主电导温度航行器--ACTV)上的仪器进行。威德尔海东部假设的高海洋热流值要求存在一种增强垂直热通量的机制。可能的机制是混合层中的相干滚动不稳定，引线下的对流和冰中的其他开口，或内波。单点测量只能表明这些机制的存在；确定特定机制需要关于其水平可变性的信息。ACTV长160厘米，直径9厘米，能够以每秒2米的速度运行一个小时。它可以被编程为在距离寻的信标1.5公里的地方进行航向推算，每次飞行可以覆盖大约5公里。它携带商业上可用的温度计和电导率传感器，其精度优于千分之一度和三万个盐度单位的百分之一。这辆车将在海冰上搭建的一个小而轻的小屋中操作，并将通过一个一米直径的洞进行部署和回收。***

9317020 Morison The proposed work is part of an integrated research program ("Anzflux") into the oceanographic structure of upper mixed layer of the eastern Weddell Sea. It is to be carried out from the RVIB Nathaniel B. Palmer in the austral winter of 1994. The work proposed here is to make high resolution measurements of the horizontal variability of temperature and salinity to help determine the three-dimensional structure of coherent convection features. The measurements will be made with instruments on a remotely operated free-ranging underwater vehicle (the Autonomous Conductivity Temperature Vehicle -- ACTV). The postulated high oceanic heat flux values in the eastern Weddell Sea require the existence of a mechanism that enhances the vertical heat flux. Possible such mechanisms are coherent roll instabilities in the mixed layer, convection under leads and other openings in the ice, or internal waves. Single point measurements can only suggest the existence of these mechanisms; the identification of the particular mechanism requires information on their horizontal variability. The ACTV, which is 160 centimeters long and 9 centimeters in diameter, is capable of one hour of operation at a speed of two meters per second. It can be programmed to dead reckoned course as far as 1.5 kilometers from a homing beacon, and can cover about five kilometers per run. It carries commercially available thermometers and conductivity sensors whose precision is better than one thousandths of a degree and one part in thirty thousand salinity units. The vehicle will be operated from a small, light- weight hut set up on the sea ice, and will be deployed and recovered through a one meter diameter hole. ***