Robustness of AI-based weather forecasts in a changing climate
Fuente:
arXiv
Gespeichert in:
| Hauptverfasser: | , , , , , , , , , , , |
|---|---|
| Format: | Preprint |
| Veröffentlicht: |
2024
|
| Schlagworte: | |
| Online-Zugang: | |
| Tags: |
Tag hinzufügen
Keine Tags, Fügen Sie den ersten Tag hinzu!
|
| _version_ | 1866929517513146368 |
|---|---|
| author | Rackow, Thomas Koldunov, Nikolay Lessig, Christian Sandu, Irina Alexe, Mihai Chantry, Matthew Clare, Mariana Dramsch, Jesper Pappenberger, Florian Pedruzo-Bagazgoitia, Xabier Tietsche, Steffen Jung, Thomas |
| author_facet | Rackow, Thomas Koldunov, Nikolay Lessig, Christian Sandu, Irina Alexe, Mihai Chantry, Matthew Clare, Mariana Dramsch, Jesper Pappenberger, Florian Pedruzo-Bagazgoitia, Xabier Tietsche, Steffen Jung, Thomas |
| contents | Data-driven machine learning models for weather forecasting have made transformational progress in the last 1-2 years, with state-of-the-art ones now outperforming the best physics-based models for a wide range of skill scores. Given the strong links between weather and climate modelling, this raises the question whether machine learning models could also revolutionize climate science, for example by informing mitigation and adaptation to climate change or to generate larger ensembles for more robust uncertainty estimates. Here, we show that current state-of-the-art machine learning models trained for weather forecasting in present-day climate produce skillful forecasts across different climate states corresponding to pre-industrial, present-day, and future 2.9K warmer climates. This indicates that the dynamics shaping the weather on short timescales may not differ fundamentally in a changing climate. It also demonstrates out-of-distribution generalization capabilities of the machine learning models that are a critical prerequisite for climate applications. Nonetheless, two of the models show a global-mean cold bias in the forecasts for the future warmer climate state, i.e. they drift towards the colder present-day climate they have been trained for. A similar result is obtained for the pre-industrial case where two out of three models show a warming. We discuss possible remedies for these biases and analyze their spatial distribution, revealing complex warming and cooling patterns that are partly related to missing ocean-sea ice and land surface information in the training data. Despite these current limitations, our results suggest that data-driven machine learning models will provide powerful tools for climate science and transform established approaches by complementing conventional physics-based models. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2409_18529 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Robustness of AI-based weather forecasts in a changing climate Rackow, Thomas Koldunov, Nikolay Lessig, Christian Sandu, Irina Alexe, Mihai Chantry, Matthew Clare, Mariana Dramsch, Jesper Pappenberger, Florian Pedruzo-Bagazgoitia, Xabier Tietsche, Steffen Jung, Thomas Atmospheric and Oceanic Physics Machine Learning Computational Physics Data-driven machine learning models for weather forecasting have made transformational progress in the last 1-2 years, with state-of-the-art ones now outperforming the best physics-based models for a wide range of skill scores. Given the strong links between weather and climate modelling, this raises the question whether machine learning models could also revolutionize climate science, for example by informing mitigation and adaptation to climate change or to generate larger ensembles for more robust uncertainty estimates. Here, we show that current state-of-the-art machine learning models trained for weather forecasting in present-day climate produce skillful forecasts across different climate states corresponding to pre-industrial, present-day, and future 2.9K warmer climates. This indicates that the dynamics shaping the weather on short timescales may not differ fundamentally in a changing climate. It also demonstrates out-of-distribution generalization capabilities of the machine learning models that are a critical prerequisite for climate applications. Nonetheless, two of the models show a global-mean cold bias in the forecasts for the future warmer climate state, i.e. they drift towards the colder present-day climate they have been trained for. A similar result is obtained for the pre-industrial case where two out of three models show a warming. We discuss possible remedies for these biases and analyze their spatial distribution, revealing complex warming and cooling patterns that are partly related to missing ocean-sea ice and land surface information in the training data. Despite these current limitations, our results suggest that data-driven machine learning models will provide powerful tools for climate science and transform established approaches by complementing conventional physics-based models. |
| title | Robustness of AI-based weather forecasts in a changing climate |
| topic | Atmospheric and Oceanic Physics Machine Learning Computational Physics |
| url | https://arxiv.org/abs/2409.18529 |