Diapycnal Fluxes due to Mixed Layer Processes in the Southern Ocean

这个项目将计算由南大洋表面混合层过程引起的底波通量。所得到的通量是诸如利用逆箱形模式和水文数据估计南大洋三维环流等应用所需的重要输入。将使用的方法是从气象分析产品中获得的具有高时间分辨率的地表通量场的混合层模型。该模型将用于确定混合层浮力、深度和夹带速率。这些特性与由水文资料确定的浮力梯度相结合，可用于确定与深化和小规模混合有关的混合层底部的横流通量。还将估计与中尺度涡旋搅拌有关的底流通量，并确定净底流通量。目前，关于南大洋上层洋底流通量的大小存在很大的不确定性。预计对这些通量及其变率进行更可靠的估计将使调查人员能够根据世界海洋环流实验期间收集的数据更清楚地了解南大洋的横向和翻转环流。

0136546/TandonThis project will compute the diapycnal fluxes due to surface mixed-layer processes in the Southern Ocean. The resulting fluxes are important inputs needed for such applications as the estimation of the three-dimensional circulation of the Southern ocean using inverse box models and hydrographic data. The approach that will be used is to force a mixed-layer model with surface flux fields with high temporal resolution, obtained from meteorological analysis products. This model will be used to determine mixed-layer buoyancy, depth and entrainment rates. These properties, when combined with buoyancy gradients determined from hydrographic data, can be used to determine the diapycnal flux across the base of the mixed layer associated with deepening and small-scale mixing. The diapycnal flux associated with stirring by mesoscale eddies will also be estimated and a net diapycnal flux determined. At present, there is significant uncertainty about the size of upper-ocean diapycnal fluxes in the Southern Ocean. It is anticipated that more robust estimates of these fluxes and their variability will enable investigators to gain a much clearer picture of the lateral and overturning circulation in the Southern Ocean from data collected during the World Ocean Circulation Experiment.