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Sea Surface Temperature Variability in the Subtropical North-East Atlantic

机译：亚热带东北大西洋海表温度的变化

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AVHR images recorded during 2001-2004 were used to analyse Sea Surface Temperature (SST) spatial variability in the Subtropical North-East Atlantic. The individual images were decimated into 4.4 km and merged into 15-day averages. To reduce remnant non-physical noise, several filters were developed. Diurnal thermocline formation stipulated that during year round day-time SST images are warmer than night-times ones. SST stationary anomalies were obtained using a method of least-square fit of the all-region-average seasonal curve to the temperature variability at each pixel. The anomaly field reflects that the Mid-Atlantic Ridge (MAR) forms an efficient barrier for heat exchange between the western and eastern Atlantic basins. The MAR was characterised by colder SST values, possibly related to flow interaction with bottom topography. On the winter-time SST stationary anomaly field the Azores current could be distinguished.
机译：2001-2004年期间记录的AVHR图像用于分析亚热带东北大西洋的海表温度（SST）空间变异性。单个图像被缩减为4.4 km，并合并为15天的平均值。为了减少残留的非物理噪声，开发了几种滤波器。昼夜温跃层的形成规定在全年的白天，SST图像要比夜间的温度高。使用所有区域平均季节性曲线的最小二乘法拟合每个像素处的温度变异性的方法来获得SST平稳异常。异常场反映出中大西洋海脊（MAR）形成了大西洋东部和西部盆地之间热交换的有效屏障。 MAR的特征是较低的SST值，可能与底部地形的流动相互作用有关。在冬季的SST平稳异常场上，可以区分亚速尔群岛的电流。

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