论文标题
深度正交分解用于对流的现象
Deep Orthogonal Decompositions for Convective Nowcasting
论文作者
论文摘要
对推动我们气候的结构化时空过程的近期预测对数百万的安全和福祉至关重要,但是这些过程的推断的非线性对流也使得对短期动态的完整机械描述也使人描述。但是,对流的运输不仅提供了对问题的原则性物理描述,而且还表明了在内容丰富的特征中的运输,这导致了``物理自由''的最新成功开发,以解决现有问题的问题。在这项工作中,我们证明它们仍然是由知情的模型扮演的重要角色,该模型可以成功利用深度学习(DL)将过程投影到最小动力学描述所具有的较低维空间。我们的方法在复杂的现实世界数据集(包括海面温度和降水量)上综合了具有物理动机的动力学的DL的特征提取能力,以优于现有模型的自由方法以及最先进的方法。
Near-term prediction of the structured spatio-temporal processes driving our climate is of profound importance to the safety and well-being of millions, but the prounced nonlinear convection of these processes make a complete mechanistic description even of the short-term dynamics challenging. However, convective transport provides not only a principled physical description of the problem, but is also indicative of the transport in time of informative features which has lead to the recent successful development of ``physics free'' approaches to the now-casting problem. In this work we demonstrate that their remains an important role to be played by physically informed models, which can successfully leverage deep learning (DL) to project the process onto a lower dimensional space on which a minimal dynamical description holds. Our approach synthesises the feature extraction capabilities of DL with physically motivated dynamics to outperform existing model free approaches, as well as state of the art hybrid approaches, on complex real world datasets including sea surface temperature and precipitation.