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.

Data sets

HALO database HALO consortium https://doi.org/10.17616/R39Q0T

GLORIA Chemistry Mode temperature and trace gas retrievals from the POLSTRACC/GW-LCYCLEII/GWEX/SALSA campaigns 2015/2016 S. Johansson, W. Woiwode, and M. Höpfner https://doi.org/10.5445/IR/1000086506

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Short summary
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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