Articles | Volume 20, issue 23
Atmos. Chem. Phys., 20, 15379–15387, 2020
https://doi.org/10.5194/acp-20-15379-2020

Special issue: The Polar Stratosphere in a Changing Climate (POLSTRACC) (ACP/AMT...

Atmos. Chem. Phys., 20, 15379–15387, 2020
https://doi.org/10.5194/acp-20-15379-2020

Technical note 11 Dec 2020

Technical note | 11 Dec 2020

Technical note: Lowermost-stratosphere moist bias in ECMWF IFS model diagnosed from airborne GLORIA observations during winter–spring 2016

Wolfgang Woiwode et al.

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Cited articles

Dyroff, C., Zahn, A., Christner, E., Forbes, R., Tompkins, A. M., and van Velthoven, P. F. J.: Comparison of ECMWF analysis and forecast humidity data with CARIBIC upper troposphere and lower stratosphere observations, Q. J. Roy. Meteor. Soc., 141, 833–844, https://doi.org/10.1002/qj.2400, 2015. 
Flentje, H., Dörnbrack, A., Ehret, G., Fix, A., Kiemle, C., Poberaj, G., and Wirth, M.: Water vapor heterogeneity related to tropopause folds over the North Atlantic revealed by airborne water vapor differential absorption lidar, J. Geophys. Res., 110, D03115, https://doi.org/10.1029/2004JD004957, 2005. 
HALO consortium: HALO database, re3data.org – Registry of Research Data Repositories, https://doi.org/10.17616/R39Q0T, 2020. 
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The lowermost-stratosphere moist bias in ECMWF analyses and 12 h forecasts is diagnosed for the Arctic winter-spring 2016 period by using two-dimensional GLORIA water vapor observations. The bias is already present in the initial conditions (i.e., the analyses), and sensitivity forecasts on time scales of < 12 h show hardly any sensitivity to modified spatial resolution and output frequency.
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