Articles | Volume 5, issue 2
Research article
05 Apr 2024
Research article |  | 05 Apr 2024

Influence of radiosonde observations on the sharpness and altitude of the midlatitude tropopause in the ECMWF IFS

Konstantin Krüger, Andreas Schäfler, Martin Weissmann, and George C. Craig

Related authors

Vertical structure of the lower-stratospheric moist bias in the ERA5 reanalysis and its connection to mixing processes
Konstantin Krüger, Andreas Schäfler, Martin Wirth, Martin Weissmann, and George C. Craig
Atmos. Chem. Phys., 22, 15559–15577,,, 2022
Short summary

Related subject area

Dynamical processes in midlatitudes
Large-scale perspective on extreme near-surface winds in the central North Atlantic
Aleksa Stanković, Gabriele Messori, Joaquim G. Pinto, and Rodrigo Caballero
Weather Clim. Dynam., 5, 821–837,,, 2024
Short summary
Divergent convective outflow in ICON deep-convection-permitting and parameterised deep convection simulations
Edward Groot, Patrick Kuntze, Annette Miltenberger, and Holger Tost
Weather Clim. Dynam., 5, 779–803,,, 2024
Short summary
Changes in the North Atlantic Oscillation over the 20th century
Stephen Outten and Richard Davy
Weather Clim. Dynam., 5, 753–762,,, 2024
Short summary
Life cycle dynamics of Greenland blocking from a potential vorticity perspective
Seraphine Hauser, Franziska Teubler, Michael Riemer, Peter Knippertz, and Christian M. Grams
Weather Clim. Dynam., 5, 633–658,,, 2024
Short summary
Warm conveyor belt characteristics and impacts along the life cycle of extratropical cyclones: case studies and climatological analysis based on ERA5
Katharina Heitmann, Michael Sprenger, Hanin Binder, Heini Wernli, and Hanna Joos
Weather Clim. Dynam., 5, 537–557,,, 2024
Short summary

Cited articles

Birner, T.: Fine-scale structure of the extratropical tropopause region, J. Geophys. Res., 111, D04104,, 2006. 
Birner, T., Dörnbrack, A., and Schumann, U.: How sharp is the tropopause at midlatitudes?, Geophys. Res. Lett., 29, 45-1–45-4,, 2002.​​​​​​​ 
Birner, T., Sankey, D., and Shepherd, T. G.: The tropopause inversion layer in models and analyses, Geophys. Res. Lett., 33, L14804,, 2006. 
Bland, J., Gray, S., Methven, J., and Forbes, R.: Characterizing extratropical near-tropopause analysis humidity biases and their radiative effects on temperature forecasts, Q. J. Roy. Meteor. Soc., 140, 3878–3898,, 2021. 
Boljka, L. and Birner, T.: Potential impact of tropopause sharpness on the structure and strength of the general circulation, npj Clim. Atmos. Sci., 5, 98,, 2022. 
Short summary
Initial conditions of current numerical weather prediction models insufficiently represent the sharp vertical gradients across the midlatitude tropopause. Observation-space data assimilation output is used to study the influence of assimilated radiosondes on the tropopause. The radiosondes reduce systematic biases of the model background and sharpen temperature and wind gradients in the analysis. Tropopause sharpness is still underestimated in the analysis, which may impact weather forecasts.