Effective training strategies for deep-learning-based precipitation nowcasting and estimation
نویسندگان
چکیده
Deep learning has been successfully applied to precipitation nowcasting. In this work, we propose a pre-training scheme and new loss function for improving deep-learning-based First, adapt U-Net, widely-used deep-learning model, the two problems of interest here: nowcasting estimation from radar images. We formulate former as classification problem with three intervals latter regression problem. For these tasks, pre-train model predict images in near future without requiring ground-truth precipitation, also use fine-tuning mitigate class imbalance demonstrate effectiveness our approach using datasets collected South Korea over seven years. It is highlighted that improve critical success index (CSI) heavy rainfall (at least 10 mm/hr) by up 95.7% 43.6%, respectively, at 5-hr lead time. reduces error 10.7%, compared conventional approach, light (between 1 mm/hr). Lastly, report sensitivity different resolutions detailed analysis four cases rainfall.
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ژورنال
عنوان ژورنال: Computers & Geosciences
سال: 2022
ISSN: ['1873-7803', '0098-3004']
DOI: https://doi.org/10.1016/j.cageo.2022.105072