تقرير
DiffObs: Generative Diffusion for Global Forecasting of Satellite Observations
| العنوان: | DiffObs: Generative Diffusion for Global Forecasting of Satellite Observations |
|---|---|
| المؤلفون: | Stock, Jason, Pathak, Jaideep, Cohen, Yair, Pritchard, Mike, Garg, Piyush, Durran, Dale, Mardani, Morteza, Brenowitz, Noah |
| سنة النشر: | 2024 |
| المجموعة: | Computer Science Physics (Other) Statistics |
| مصطلحات موضوعية: | Physics - Computational Physics, Computer Science - Computer Vision and Pattern Recognition, Computer Science - Machine Learning, Physics - Atmospheric and Oceanic Physics, Statistics - Machine Learning |
| الوصف: | This work presents an autoregressive generative diffusion model (DiffObs) to predict the global evolution of daily precipitation, trained on a satellite observational product, and assessed with domain-specific diagnostics. The model is trained to probabilistically forecast day-ahead precipitation. Nonetheless, it is stable for multi-month rollouts, which reveal a qualitatively realistic superposition of convectively coupled wave modes in the tropics. Cross-spectral analysis confirms successful generation of low frequency variations associated with the Madden--Julian oscillation, which regulates most subseasonal to seasonal predictability in the observed atmosphere, and convectively coupled moist Kelvin waves with approximately correct dispersion relationships. Despite secondary issues and biases, the results affirm the potential for a next generation of global diffusion models trained on increasingly sparse, and increasingly direct and differentiated observations of the world, for practical applications in subseasonal and climate prediction. Comment: Published as a workshop paper at "Tackling Climate Change with Machine Learning", ICLR 2024 |
| نوع الوثيقة: | Working Paper |
| URL الوصول: | http://arxiv.org/abs/2404.06517 |
| رقم الأكسشن: | edsarx.2404.06517 |
| قاعدة البيانات: | arXiv |
| الوصف غير متاح. |