Arctic and Antarctic Ice-Ocean Modeling and Investigations of the Role of Ice Dynamics in Global Ocean Thermohaline Circulation

该项目将试图量化海冰和海冰运输对高纬度海洋盐度异常的存在和持续的影响，以及更广泛地说对全球海洋环流的影响。过去的全球建模工作只包括基本的冰动力学和热力学，而海冰模型通常忽略了海冰的大尺度海洋影响。该项目将包括全海冰动力学的冰-海洋模型与斜压海洋模型相结合。通过改变所包含的全球海洋的比例，可以清楚地展示海冰效应。一系列数值研究将关注的问题是，冰出口或向赤道方向的冰运输对区域盐度预算有多重要，以及冰预算的变化在多大程度上会影响地理上现实的海洋盆地的温盐环流。在分别研究了北半球和南半球的冰-海洋环流模式之后，将为大西洋建立一个完整的模式。利用这一模型，预计可以获得不对称的全球温盐环流模式，然后可以对该模式进行扰动，以评估北极盆地和南极绕极区域冰的修正输送的全球规模影响。

This project will attempt to quantify the effects of sea ice and ice transport on the presence and persistence of high latitude oceanic salinity anomalies, and , more generally, on the circulation of the global oceans. Past global modelling efforts have included only rudimentary ice dynamics and thermodynamics, while sea ice models have generally neglected the large-scale oceanic effects of the sea ice. This project will couple an ice-ocean model that includes full sea ice dynamics to a baroclinic ocean model. By varying the fraction of the included global ocean, the sea ice effect can be explicitly demonstrated. A series of numerical studies will be concerned with the question of how critical ice export, or equatorward ice transport, is on regional salinity budgets, and how much of a variation in the ice budget can affect the thermohaline circulation of geographically realistic ocean basins. After separate studies of the northern and southern hemisphere ice-ocean circulation models, a complete model will be constructed for the Atlantic Ocean. With this model it is anticipated that an asymmetrical global mode of the thermohaline circulation can be obtained, which may then be perturbed in order to assess the global-scale effect of modified ice transport from the Arctic Basin and the Antarctic circumpolar region.