source: arxiv statistics ml: tsconet: a two-stage copula cnn-lstm for uncertainty-aware spatio-temporal forecasting

level: research

forecasting multiple interrelated environmental variables like precipitation and temperature across many locations requires both accurate predictions and reliable uncertainty estimates. deep learning models often give accurate means but lack uncertainty, and adding uncertainty via maximum likelihood can hurt accuracy, especially with strongly correlated variables. tsconet addresses this by using a two-stage approach: first learning accurate mean forecasts, then refining a shared representation to estimate predictive variance while keeping the mean fixed.

the model uses a convolutional-recurrent architecture paired with a gaussian copula to capture dependencies between variables and across space and time. by separating mean and variance estimation, it avoids the trade-off between accuracy and uncertainty quality. the copula component models joint distributions, enabling calibrated prediction intervals even when variables are highly correlated. experiments on environmental data show tsconet maintains forecast accuracy while providing well-calibrated uncertainty.

this approach is useful for tasks like regional climate modeling, where decision-makers need to know not just expected values but also confidence levels. the two-stage design can be applied to other spatio-temporal forecasting problems where uncertainty is critical. the method's ability to handle multiple correlated outputs makes it relevant for fields like energy demand forecasting or air quality monitoring, where variables often move together.

why it matters: reliable uncertainty estimates in multi-variable forecasts help data scientists build safer decision systems for climate, energy, and environmental monitoring.


source: arxiv statistics ml: tsconet: a two-stage copula cnn-lstm for uncertainty-aware spatio-temporal forecasting