by Tristan Quaife, May 2025 Implementing a Data Assimilation system for a model can be an arduous task, often involving a substantial amount of reprogramming. A better option, where possible,…Read More >
Progress in estimating the state of the atmosphere-ocean system
by Peter Jan van Leeuwen(1), April 2025 (1): Department of Atmospheric Science, Colorado State University, Colorado, USA In a blog post dated 16 April 2025, Amos Lawless provided a valuable…Read More >
Simultaneous estimation of the atmosphere and ocean states
by Amos Lawless, April 2025 Why is the ocean relevant for weather forecasts? The weather we experience each day is influenced not just by what is happening throughout the atmosphere,…Read More >
The least squares method in data assimilation
by Ross Bannister, April 2025 The method of least squares (or MLS, Barlow, 1993) is at the very centre of variational data assimilation (or “Var”, Schlatter, 2000). Var is one…Read More >
12th Workshop on Meteorological Sensitivity Analysis and Data Assimilation
by Laura Risley, June 2024 After a 6-year hiatus, 2024 saw the return of the ‘Workshop on Meteorological Sensitivity Analysis and Data Assimilation’ also known as the Adjoint Workshop! The…Read More >
Observation-related matrix calculations in variational data assimilation
By Guannan Hu, May 2024 Data assimilation is a process that uses meteorological observations to improve the initial conditions for weather forecasting. To make the best use of the observations,…Read More >
Why do we bother with data assimilation software (and PDAF)?
by Yumeng Chen, May 2024 Data assimilation (DA) has various applications in the field of weather and climate prediction. Previous DARC blogs introduced its capability in numerical weather prediction, air…Read More >
“Doomed (!), doomed (?)” – Is the AMOC at risk of reversal?
by Ivo Pasmans, April 2024 “We’re doomed, doomed!” was the catch phrase of the always cheerful and generous private Frasier in the British sitcom Dad’s Army. And if recent publications…Read More >
Are satellite observations really measuring the same thing as your model predicts? Probably not. Here’s what to do about it.
by Tristan Quaife, March 2024 In Data Assimilation it is often necessary to assimilate observation types that are related to, but not directly predicted by, the underlying process model. Achieving…Read More >
