An ocean transport model for the North Atlantic
An ocean transport model for the North Atlantic
复制标题
北大西洋的海洋运输模型
DOI：
--
复制
发表时间：
1982
期刊：
影响因子：
--
通讯作者：
K. Bryan
中科院分区：
文献类型：
--
作者：
J. Sarmiento;K. Bryan
使用稳健的诊断模型获得北大西洋环流的三维解决方案。与以前的诊断模型相比，稳健的诊断模型结合了大尺度热场、盐度场以及动量守恒。通过闭合条件获得了对观察到的温度和盐度场的近似拟合。该方法是稳健的，因为它对经典诊断方法的密度输入字段不具有极端的敏感性。平衡解是通过与时间相关的方程的数值积分获得的。速度场的误差估计可以从数值解中间接获得。作为输入的温度观测值经纬度有效分辨率为3°×3°，采样误差为±0.15°C。根据底部地形，等效垂直积分速度误差估计为 ±0.5–1.0 cm/s。通过与热量和盐度平衡估计进行比较来判断该模型对地球化学工作的适用性。对于模型在地表以下具有最小观测约束的情况，可获得最佳结果。
Three-dimensional solutions are obtained for the circulation of the North Atlantic using a robust diagnostic model. In contrast to previous diagnostic models the robust diagnostic model incorporates the conservation of the large-scale fields of heat and salinity as well as momentum. An approximate fit to observed fields of temperature and salinity is obtained by a closure condition. The method is robust in the sense that it does not have the extreme sensitivity to the density input fields of the classical diagnostic method. Equilibrium solutions are obtained by numerical integration of the time-dependent equations. Error estimates for the velocity field can be obtained indirectly from the numerical solutions. Temperature observations used as input have an effective resolution of 3°×3° of latitude and longitude and a sampling error of ± 0.15°C. The equivalent vertically integrated velocity error is estimated to be ±0.5–1.0 cm/s depending on bottom topography. The suitability of the model for geochemical work is judged by comparison with heat and salinity balance estimates. Best results are obtained for the case in which the model has a minimum observational constraint below the surface.