01 Sep 2023
 | 01 Sep 2023
Status: this preprint is open for discussion and under review for Atmospheric Chemistry and Physics (ACP).

Convective gravity wave events during summer near 54°N, present in both AIRS and RMR Lidar observations

Eframir Franco-Diaz, Michael Gerding, Laura Holt, Irina Strelnikova, Robin Wing, Gerd Baumgarten, and Franz-Josef Lübken

Abstract. We connect tropospheric deep convective events over Western Europe, as measured by the 8.1 µm radiance observations from NASA's Aqua satellite's Atmospheric Infrared Sounder (AIRS), to horizontal brightness temperature variance in the 4 µm AIRS channel (maximum sensitivity at around 40 km) and temperature perturbations in vertical lidar profiles (between 33–43 km) over Kühlungsborn, Germany (54.12° N, 11.77° E). To account for wave propagation conditions from the troposphere to the stratosphere, we also consider the horizontal winds in the troposphere and stratosphere using ECMWF. In this work, we highlight sporadic peaks in gravity wave activity in summer greatly exceeding those typical of summer, which is generally a season with lower wave activity compared to winter. Although these events are present in roughly half of the years (between 2003 and 2019), we focus our study on two case study years (2014 and 2015). These case study years were chosen because of the high cadence of lidar soundings close in time to the convective events. These events, while sporadic, could contribute significantly to the zonal mean momentum budget and are not accounted for in weather and climate models.

Eframir Franco-Diaz et al.

Status: open (until 13 Oct 2023)

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  • RC1: 'Comment on egusphere-2023-1963', Anonymous Referee #1, 27 Sep 2023 reply

Eframir Franco-Diaz et al.

Eframir Franco-Diaz et al.


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Short summary
In this study, we use satellite, lidar and ECMWF data to study storm-related waves that propagate above Kühlungsborn, Germany during summer. Although these events occur in roughly half of the years of the satellite data we analyzed, we focus our study on two case study years (2014 and 2015). These events could contribute significantly to middle atmospheric circulation and are not accounted for in weather and climate models.