Closing the sea surface mixed layer temperature budget from in situ observations alone: Operation Advection during BoBBLE
Closing the sea surface mixed layer temperature budget from in situ observations alone: Operation Advection during BoBBLE
复制标题
仅根据现场观测关闭海面混合层温度预算：BoBBLE 期间的平流操作
作者：
V. Vijith;P. Vinayachandran;B. Webber;A. Matthews;J. George;Vijay Kumar Kannaujia;A. Lotliker;P. Amol
海面温度（SST）是季风降雨和热带气旋等热带天气系统的基本驱动因素。然而，人们对控制海温变化的因素缺乏了解，特别是在季风期间，现场观测很少。在这里，我们使用突破性的观测方法来确定对孟加拉湾南部海温变化的控制。我们通过首次完全关闭海洋混合层能量预算来实现这一目标，该能量预算完全来自孟加拉湾边界层实验（BoBBLE）期间的现场观测。当地测量的水平平流和夹带对海温演变以及观测期间海洋变化的影响比预期更显着。最先进的气候模型很难解决这些过程，这可能导致季风降雨变化的代表性较差。这里介绍的新技术为未来的观测实验提供了蓝图，以量化较长时间尺度上的混合层热预算并评估模型中的这些过程。
Sea surface temperature (SST) is a fundamental driver of tropical weather systems such as monsoon rainfall and tropical cyclones. However, understanding of the factors that control SST variability is lacking, especially during the monsoons when in situ observations are sparse. Here we use a ground-breaking observational approach to determine the controls on the SST variability in the southern Bay of Bengal. We achieve this through the first full closure of the ocean mixed layer energy budget derived entirely from in situ observations during the Bay of Bengal Boundary Layer Experiment (BoBBLE). Locally measured horizontal advection and entrainment contribute more significantly than expected to SST evolution and thus oceanic variability during the observation period. These processes are poorly resolved by state-of-the-art climate models, which may contribute to poor representation of monsoon rainfall variability. The novel techniques presented here provide a blueprint for future observational experiments to quantify the mixed layer heat budget on longer time scales and to evaluate these processes in models.