Stratospheric age of air computed with trajectories based on various 3D-Var and 4D-Var data sets

• Published in: Atmospheric chemistry and physics Vol. 5; no. 1; pp. 1 - 7
• Main Authors: Scheele, M. P., Siegmund, P. C., Velthoven, P. F. J.
• Format: Journal Article
• Language: English
• Published: European Geosciences Union 10.01.2005; Copernicus Publications
• Subjects: Ocean, Atmosphere; Sciences of the Universe

The age of stratospheric air is computed with a trajectory model, using ECMWF ERA-40 3D-Var and operational 4D-Var winds. Analysis as well as forecast data are used. In the latter case successive forecast segments are put together to get a time series of the wind fields. This is done for different f...