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View article: Comment on egusphere-2023-1765
Comment on egusphere-2023-1765 Open
Abstract. In contrast to strong constraint 4DVar, the weak constraint takes into account the model imperfection in the minimisation process. Relaying on a simple one-dimensional advection equation for a passive tracer, this study shows tha…
View article: On the transition from strong to weak constraint 4DVar using asimple one-dimensional advection equation for a passive tracer
On the transition from strong to weak constraint 4DVar using asimple one-dimensional advection equation for a passive tracer Open
In contrast to strong constraint 4DVar, the weak constraint takes into account the model imperfection in the minimisation process. Relaying on a simple one-dimensional advection equation for a passive tracer, this study shows that the tran…
View article: Flow‐dependent wind extraction in strong‐constraint 4D‐Var
Flow‐dependent wind extraction in strong‐constraint 4D‐Var Open
In the process of data assimilation for numerical weather prediction, biases in the model and observations can induce spurious analysis increments, which degrade the quality of the analyses. For this reason, the feedback of atmospheric com…
View article: The Relationship between Desroziers and Three-Cornered Hat Methods
The Relationship between Desroziers and Three-Cornered Hat Methods Open
<p>This note examines the relationship between what at first sight looks like two unrelated methods for estimating&#160;second order statistics of relevance to data assimilation. The first method is due to Desroziers et al. (2005…
View article: On the Link Between the Madden‐Julian Oscillation, Euro‐Mediterranean Weather Regimes, and Morocco Winter Rainfall
On the Link Between the Madden‐Julian Oscillation, Euro‐Mediterranean Weather Regimes, and Morocco Winter Rainfall Open
K ‐means cluster analysis of wintertime 500‐hPa geopotential height anomalies allowed identifying seven weather regimes (WRs) describing the atmospheric variability over the Euro‐Mediterranean domain. The study of transitions between those…
View article: Convection and waves on Small Earth and Deep Atmosphere
Convection and waves on Small Earth and Deep Atmosphere Open
A scaled version of the European Centre for Medium-Range Weather Forecasts (ECMWF) spectral hydrostatic forecast model (IFS) has been developed with full physics using an Aqua planet configuration. This includes Kuang et al.'s Small Earth …
View article: Dynamical contribution of mean potential vorticity pseudo-observations derived from MetOp/GOME2 ozone data into short-range weather forecast during high precipitation events
Dynamical contribution of mean potential vorticity pseudo-observations derived from MetOp/GOME2 ozone data into short-range weather forecast during high precipitation events Open
Satellites are uniquely capable of providing uniform data coverage globally. Motivated by such capability, this study builds on a previously described methodology that generates numerical weather prediction initial conditions from satellit…