arXiv:2511.11152cs.LG2025-11被引 2

用可解释深度学习预测印度四城短时降水,精度高且过程透明。

Deep Learning for Short-Term Precipitation Prediction in Four Major Indian Cities: A ConvLSTM Approach with Explainable AI

  • 混合卷积CNN-ConvLSTM模型,针对不同城市优化滤波器数量。
  • 各城预报误差在0.21~1.80 mm/day之间,最长可预5天。
  • 通过多种可解释技术揭示城市特异性预报依据,适合气象决策者。

针对深度学习降水预报常为黑箱的问题,本文构建了面向印度四大城市(班加罗尔、孟买、德里、加尔各答)的可解释深度学习框架,覆盖多样气候区。采用时序分布式CNN-ConvLSTM混合架构,基于多十年ERA5再分析数据训练,各城市分别使用32(班加罗尔)、64(孟买、德里)、128(加尔各答)个卷积滤波器。模型在班加罗尔、孟买、德里、加尔各答的均方根误差(RMSE)分别为0.21、0.52、0.48和1.80 mm/day。通过置换重要性、梯度加权类激活映射(Grad-CAM)、时间遮蔽和反事实扰动等可解释性分析,发现模型依赖城市特异性变量,预报时效从班加罗尔的1天至加尔各答的5天不等。研究证明,可解释AI可在保持高精度的同时提供对复杂降水模式的透明洞察。

原文摘要 · Abstract (English)

Deep learning models for precipitation forecasting often function as black boxes, limiting their adoption in real-world weather prediction. To enhance transparency while maintaining accuracy, we developed an interpretable deep learning framework for short-term precipitation prediction in four major Indian cities: Bengaluru, Mumbai, Delhi, and Kolkata, spanning diverse climate zones. We implemented a hybrid Time-Distributed CNN-ConvLSTM (Convolutional Neural Network-Long Short-Term Memory) architecture, trained on multi-decadal ERA5 reanalysis data. The architecture was optimized for each city with a different number of convolutional filters: Bengaluru (32), Mumbai and Delhi (64), and Kolkata (128). The models achieved root mean square error (RMSE) values of 0.21 mm/day (Bengaluru), 0.52 mm/day (Mumbai), 0.48 mm/day (Delhi), and 1.80 mm/day (Kolkata). Through interpretability analysis using permutation importance, Gradient-weighted Class Activation Mapping (Grad-CAM), temporal occlusion, and counterfactual perturbation, we identified distinct patterns in the model's behavior. The model relied on city-specific variables, with prediction horizons ranging from one day for Bengaluru to five days for Kolkata. This study demonstrates how explainable AI (xAI) can provide accurate forecasts and transparent insights into precipitation patterns in diverse urban environments.

降水预测可解释AIConvLSTM城市气象

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