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arXiv 2406.01465physics.ao-ph
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AIFS——ECMWF的数据驱动预报系统

AIFS -- ECMWF's data-driven forecasting system

Simon Lang, Mihai Alexe, Matthew Chantry, Jesper Dramsch, Florian Pinault, Baudouin Raoult, Mariana C. A. Clare, Christian Lessig, Michael Maier-Gerber, Linus M… 展开作者

Simon Lang, Mihai Alexe, Matthew Chantry, Jesper Dramsch, Florian Pinault, Baudouin Raoult, Mariana C. A. Clare, Christian Lessig, Michael Maier-Gerber, Linus Magnusson, Zied Ben Bouallègue, Ana Prieto Nemesio, Peter D. Dueben, Andrew Brown, Florian Pappenberger, Florence Rabier

AI总结:

本文介绍ECMWF开发的AIFS数据驱动预报系统,其基于图神经网络和滑动窗口Transformer,在ERA5及业务NWP分析场上训练,并在高空变量、地面天气和热带气旋路径预报中展现出高技巧。

摘要:

基于机器学习的天气预报模型已迅速成为实现准确中期全球天气预报的一种有前景的方法。在此,我们介绍人工智能预报系统(AIFS),这是由欧洲中期天气预报中心(ECMWF)开发的数据驱动预报模型。AIFS基于图神经网络(GNN)编码器和解码器以及滑动窗口Transformer处理器,并在ECMWF的ERA5再分析资料和ECMWF业务数值天气预报(NWP)分析场上进行训练。它具有灵活且模块化的设计,并支持多个并行层级,以便在高分辨率输入数据上进行训练。AIFS的预报技巧通过将其预报与NWP分析场和直接观测数据进行比较来评估。我们表明,AIFS对高空变量、地面天气参数和热带气旋路径都能产生高技巧预报。AIFS每天运行四次,与ECMWF基于物理的NWP模型并行运行,其预报在ECMWF开放数据政策下向公众提供。

英文摘要:

Machine learning-based weather forecasting models have quickly emerged as a promising methodology for accurate medium-range global weather forecasting. Here, we introduce the Artificial Intelligence Forecasting System (AIFS), a data driven forecast model developed by the European Centre for Medium-Range Weather Forecasts (ECMWF). AIFS is based on a graph neural network (GNN) encoder and decoder, and a sliding window transformer processor, and is trained on ECMWF's ERA5 re-analysis and ECMWF's operational numerical weather prediction (NWP) analyses. It has a flexible and modular design and supports several levels of parallelism to enable training on high-resolution input data. AIFS forecast skill is assessed by comparing its forecasts to NWP analyses and direct observational data. We show that AIFS produces highly skilled forecasts for upper-air variables, surface weather parameters and tropical cyclone tracks. AIFS is run four times daily alongside ECMWF's physics-based NWP model and forecasts are available to the public under ECMWF's open data policy.

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。

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