Particle filter code

Offline data assimilation code utilizing a particle filter: https://github.com/dalaiden/DA_offline_PF. The program has been employed in several recent publications (Dalaiden et al., 2021; Dalaiden, Rezsöhazy et al., 2023). For further details about the method, please refer to these publications. A video explaining the method and how we produced the Antarctic climate reconstructions: https://youtu.be/3eY3XPmbZH8?si=VnWfFwemWJcWH47K.