Anthropogenic fingerprints in daily precipitation revealed by deep learning
SCIE
SCOPUS
- Title
- Anthropogenic fingerprints in daily precipitation revealed by deep learning
- Authors
- Ham Y.-G.; Kim J.-H.; Min S.-K.; Kim D.; Li T.; Timmermann A.; Stuecker M.F.
- Date Issued
- 2023-10
- Publisher
- Nature Publishing Group
- Abstract
- According to twenty-first century climate-model projections, greenhouse warming will intensify rainfall variability and extremes across the globe 1–4. However, verifying this prediction using observations has remained a substantial challenge owing to large natural rainfall fluctuations at regional scales 3,4. Here we show that deep learning successfully detects the emerging climate-change signals in daily precipitation fields during the observed record. We trained a convolutional neural network (CNN) 5 with daily precipitation fields and annual global mean surface air temperature data obtained from an ensemble of present-day and future climate-model simulations 6. After applying the algorithm to the observational record, we found that the daily precipitation data represented an excellent predictor for the observed planetary warming, as they showed a clear deviation from natural variability since the mid-2010s. Furthermore, we analysed the deep-learning model with an explainable framework and observed that the precipitation variability of the weather timescale (period less than 10 days) over the tropical eastern Pacific and mid-latitude storm-track regions was most sensitive to anthropogenic warming. Our results highlight that, although the long-term shifts in annual mean precipitation remain indiscernible from the natural background variability, the impact of global warming on daily hydrological fluctuations has already emerged. © 2023, The Author(s).
- URI
- https://oasis.postech.ac.kr/handle/2014.oak/119279
- DOI
- 10.1038/s41586-023-06474-x
- ISSN
- 0028-0836
- Article Type
- Article
- Citation
- Nature, vol. 622, no. 7982, page. 301 - 307, 2023-10
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- There are no files associated with this item.
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