arXivDaily arXiv每日学术速递 周一至周五更新
arXiv周末暂无论文更新,休息一下吧,周末愉快~~
arXiv 2102.00696cs.LGcs.AIcs.CV

基于带注意力与上下文匹配器机制的卷积LSTM的数值天气预报

Numerical Weather Forecasting using Convolutional-LSTM with Attention and Context Matcher Mechanisms

Georgia Institute of Technology(佐治亚理工学院);Bilkent University(比尔肯特大学)

Selim Furkan Tekin, Arda Fazla, Suleyman Serdar Kozat

AI总结:

针对高分辨率物理数值天气预报计算成本高的问题,提出融合卷积LSTM、卷积神经网络及注意力与上下文匹配器机制的Weather Model,在ERA5、WeatherBench基准上性能优于多个深度学习基线,准确率高且易解释。

摘要:

采用高分辨率物理模型进行数值天气预报通常需要在超级计算机上消耗大量计算资源,这限制了其在大多数实际应用中的广泛使用。作为一种解决方案,深度学习方法的应用为该领域带来了创新性的解决思路。为此,我们提出了一种用于高分辨率时空天气数据预报的新型深度学习架构。我们的方法通过整合卷积长短期记忆网络(Convolutional Long-short Term Memory)与卷积神经网络,对传统的编码器-解码器结构进行了扩展。此外,我们还将注意力机制与上下文匹配器机制融入模型架构中。我们的Weather Model与ConvLSTM、TrajGRU和U-Net等基线深度学习模型相比,实现了显著的性能提升。我们的实验评估采用了大规模的真实世界基准数值天气数据集,即ERA5气压层小时数据集与WeatherBench。研究结果表明,该模型通过聚焦输入序列不同部分的注意力矩阵来建模大气环流,在识别时空相关性方面取得了实质性改进。我们还使用基准指标将该模型与高分辨率物理模型进行了对比,结果显示我们的Weather Model准确率高且易于解释。

英文摘要:

Numerical weather forecasting using high-resolution physical models often requires extensive computational resources on supercomputers, which diminishes their wide usage in most real-life applications. As a remedy, applying deep learning methods has revealed innovative solutions within this field. To this end, we introduce a novel deep learning architecture for forecasting high-resolution spatio-temporal weather data. Our approach extends the conventional encoder-decoder structure by integrating Convolutional Long-short Term Memory and Convolutional Neural Networks. In addition, we incorporate attention and context matcher mechanisms into the model architecture. Our Weather Model achieves significant performance improvements compared to baseline deep learning models, including ConvLSTM, TrajGRU, and U-Net. Our experimental evaluation involves high-scale, real-world benchmark numerical weather datasets, namely the ERA5 hourly dataset on pressure levels and WeatherBench. Our results demonstrate substantial improvements in identifying spatial and temporal correlations with attention matrices focusing on distinct parts of the input series to model atmospheric circulations. We also compare our model with high-resolution physical models using the benchmark metrics and show that our Weather Model is accurate and easy to interpret.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

↑