Identifying the roles of the ocean and atmosphere in creating a rapid equatorial response to a Southern Ocean anomaly
Identifying the roles of the ocean and atmosphere in creating a rapid equatorial response to a Southern Ocean anomaly
复制标题
确定海洋和大气在赤道对南大洋异常快速响应中的作用
DOI：
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发表时间：
2006
期刊：
影响因子：
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通讯作者：
V. Zalesny
中科院分区：
文献类型：
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作者：
A. Blaker;B. Sinha;V. Ivchenko;N. Wells;V. Zalesny
最近的研究利用一个理想化的海洋模型确定了海洋对南大洋盐度异常的快速反应机制。在这里，我们研究海洋和大气在建立对南大洋异常的赤道响应方面的相对重要性。利用耦合的气候模式和真实的底部地形和地貌，从一个高纬度异常中产生了两个快速遥相关。30天后，可以看到赤道海洋的响应。产生这种响应的机制依赖于正压和斜压海洋波的传播。在大气Rossby波的驱动下，北半球(NH)高纬度地区出现了第二个大气响应。海洋对其上方的大气信号做出快速反应，导致NH高纬度地区的海表面温度异常。
Recent research has identified a rapid ocean response mechanism to salinity anomalies in the Southern Ocean using an idealised ocean model. Here we examine the relative importance of the ocean and atmosphere in creating an equatorial response to a Southern Ocean anomaly. Using a coupled climate model with realistic bottom topography and land relief, two rapid teleconnections are produced from a high latitude anomaly. An equatorial ocean response can be seen after 30 days. The mechanism producing this response is shown to rely on barotropic and baroclinic oceanic wave propagation. A second, atmospheric, response is seen in the Northern Hemisphere (NH) high latitudes, driven by atmospheric Rossby waves. The ocean quickly responds to the atmospheric signal above it, resulting in sea surface temperature anomalies at NH high latitudes.