Proshutinsky A Y, Johnson M
Institute of Marine Science, University of Alaska, Fairbanks 99775-7220, USA.
Mar Pollut Bull. 2001 Jan-Jun;43(1-6):61-70. doi: 10.1016/s0025-326x(00)00234-4.
A two-dimensional barotropic, coupled, ocean-ice model with a space resolution of 55.5 km and driven by atmospheric forces, river run-off, and sea-level slope between the Pacific and the Arctic Oceans, has been used to simulate the vertically averaged currents and ice drift in the Arctic Ocean. Results from 43 years of numerical simulations of water and ice motions demonstrate that two wind-driven circulation regimes are possible in the Arctic, a cyclonic and an anti-cyclonic circulation. These two regimes appear to alternate at 5-7 year intervals with the 10-15 year period. It is important to pollution studies to understand which circulation regime prevails at any time. It is anticipated that 1995 is a year with a cyclonic regime, and during this cyclonic phase and possibly during past cyclonic regimes as well, pollutants may reach the Alaskan shelf. The regime shifts demonstrated in this paper are fundamentally important to understanding the Arctic's general circulation and particularly important for estimating pollution transport.
一个二维正压、耦合的海冰模型，空间分辨率为55.5千米，由大气作用力、径流以及太平洋和北冰洋之间的海平面坡度驱动，已被用于模拟北冰洋的垂直平均海流和冰漂移。43年的水和冰运动数值模拟结果表明，北极可能存在两种风驱动环流模式，即气旋式环流和反气旋式环流。这两种模式似乎以5至7年的间隔交替出现，周期为10至15年。对于污染研究而言，了解任何时候哪种环流模式占主导地位很重要。预计1995年是气旋式模式的年份，在这个气旋阶段以及可能在过去的气旋阶段，污染物可能会到达阿拉斯加陆架。本文所展示的模式转变对于理解北极的总体环流至关重要，对于估计污染传输尤其重要。
