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

这个项目将试图量化海冰和冰运对高纬度海洋盐度异常的存在和持续的影响，以及更一般地说，对全球海洋环流的影响。过去的全球模拟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效应。这个项目将把一个包括全海冰动力学的冰-海模型与一个斜压海洋模型结合起来。通过改变全球海洋的比例，可以明确地证明海冰效应。一系列的数值研究将涉及关键的冰输出或向赤道的冰输送对区域盐度收支的影响，以及冰收支的变化在多大程度上能影响地理上现实的海洋盆地的热盐环流。在分别研究了北半球和南半球冰-海洋环流模式之后，将建立一个完整的大西洋模式。利用这一模式，预计可以得到一个不对称的全球温盐环流模式，然后可以对其进行扰动，以便评估来自北极盆地和南极环极地区的修正冰输送的全球尺度效应。

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.