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

Woiwode, Wolfgang; Dörnbrack, Andreas; Polichtchouk, Inna; Johansson, Sören; Harvey, Ben; Höpfner, Michael; Ungermann, Jörn; Friedl-Vallon, Felix

doi:https://doi.org/10.5194/acp-20-15379-2020

Articles | Volume 20, issue 23

https://doi.org/10.5194/acp-20-15379-2020

© Author(s) 2020. This work is distributed under
the Creative Commons Attribution 4.0 License.

Special issue:

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

https://doi.org/10.5194/acp-20-15379-2020

© Author(s) 2020. This work is distributed under
the Creative Commons Attribution 4.0 License.

Articles | Volume 20, issue 23

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, Andreas Dörnbrack, Inna Polichtchouk, Sören Johansson, Ben Harvey, Michael Höpfner, Jörn Ungermann, and Felix Friedl-Vallon

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

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.