Simulation of sea ice transport through Fram Strait: Natural variability and sensitivity to forcing
Simulation of sea ice transport through Fram Strait: Natural variability and sensitivity to forcing
复制标题
模拟通过弗拉姆海峡的海冰运输：自然变化和对强迫的敏感性
DOI：
10.1029/97jc02472
复制
发表时间：
1998
影响因子：
--
通讯作者：
M. Hilmer
中科院分区：
文献类型：
--
作者：
M. Harder;P. Lemke;M. Hilmer
通过动态-热力学海冰模型模拟了通过弗拉姆海峡的海冰输送的年际变化。 1986年至1992年7年间，风场每日变化的强迫导致海冰漂移在时间尺度上从几天到几年的高度变化。通过普拉姆海峡的模拟冰运输的年度平均值差异高达 2 倍。额外的敏感性研究调查了海冰运输对规定的大气和海洋强迫变化的响应。风速、洋流速度、气温和降水率在很大范围内系统地变化。该模型预测冰输送与风速和洋流几乎呈线性关系，与气温具有很强的非线性关系，并且对降水变化的敏感性相当小。结果表明，风力强迫的年际变化导致弗拉姆海峡海冰出口的显着变化。与海冰输送相关的淡水通量和负潜热可以显着影响格陵兰海和北大西洋的海洋环流。这表明海洋环流的变化如何通过海冰平流机制与大气的变化耦合起来。为了充分代表大气-冰冻圈-海洋耦合系统中的这些重要相互作用，气候模型中必须包含海冰的动力学和热力学。
The interannual variability of the sea ice transport through Fram Strait is simulated with a dynamic-thermodynamic sea ice model. Forcing with daily varying wind fields for the 7-year period 1986–1992 causes a high variability of sea ice drift on timescales from days to years. Annual means of simulated ice transport through Pram Strait differ up to a factor of 2. Additional sensitivity studies investigate the response of sea ice transports to variations of the prescribed atmospheric and oceanic forcing. Wind speed, ocean current speed, air temperature, and precipitation rate are systematically varied over a wide range. The model predicts an almost linear relation of ice transport with wind speed and ocean current, a strong, nonlinear relation with air temperature, and a rather small sensitivity to changes in precipitation. The results show that the interannual variability of wind forcing causes considerable variations of sea ice export through Fram Strait. The fluxes of freshwater and negative latent heat associated with the sea ice transport can significantly affect the ocean circulation in the Greenland Sea and in the North Atlantic. This shows how variations of the ocean circulation are coupled to the variability of the atmosphere by the mechanism of sea ice advection. To adequately represent these important interactions in the coupled system atmosphere-cryosphere-ocean, both the dynamics and the thermodynamics of sea ice must be included in climate models.
DOI：
--
发表时间：
2007
期刊：
Tellus 59
影响因子：
--
作者：
Sawada;K.;J. Ukita
通讯作者：
J. Ukita