Derivation of horizontal and vertical wavelengths using a scanning OH(3-1) airglow spectrometer

Abstract

For the first time, we present an approach to derive zonal, meridional and vertical wavelengths as well as periods of gravity waves based on only one OH* spectrometer addressing one vibrational-rotational transition. Knowledge of these parameters 15 is a precondition for the calculation of further information such as the wave group velocity vector.OH(3-1) spectrometer measurements allow the analysis of gravity wave periods, but spatial information cannot necessarily be deduced. We use a scanning spectrometer and the harmonic analysis to derive horizontal wavelengths at the mesopause above Oberpfaffenhofen (48.09°N, 11.28°E), Germany for 22 nights in 2015. Based on the approximation of the dispersion relation for gravity waves of low and medium frequency and additional horizontal wind information, we calculate vertical 20 wavelengths afterwards. The mesopause wind measurements nearest to Oberpfaffenhofen are conducted at Collm (51.30°N, 13.02°E), Germany, ca. 380 km northeast of Oberfpaffenhofen by a meteor radar.In order to check our results, vertical temperature profiles of TIMED-SABER (Thermosphere Ionosphere Mesosphere Energetics Dynamics, Sounding of the Atmosphere using Broadband Emission Radiometry) overpasses are analysed with respect to the dominating vertical wavelength. 25Atmos. Meas. Tech. Discuss., https://doi

Study of second-order wind statistics in the mesosphere and lower thermosphere region from multistatic specular meteor radar observations during the SIMONe 2018 campaign

“…Lidar measurements of temperature, density and wind measurements are used to investigate GWs in the stratosphere and mesosphere (e.g., Chanin and Hauchecorne, 1981;Gardner and Voelz, 1987;Alexander et al, 2011;Baumgarten, 2010;Baumgarten et al, 2015;Strelnikova et al, 2020). Another technique to observe mesospheric GWs is the imaging of airglow emission layers, which provides information about spatial and temporal characteristics of the GWs (e.g., Swenson and Mende, 1994;Medeiros et al, 2003;Vargas et al, 2007Vargas et al, , 2016Wüst et al, 2017;Taylor et al, 2019;Vargas, 2019). Mesosphere-stratosphere-troposphere (MST), medium frequency (MF), incoherent scatter and specular meteor radars (SMRs) are some of the various types of radars utilized to estimate mean winds and correlations, from which it is possible to examine GWs and turbulence in the MLT region (e.g., Gage and Balsley, 1984;Nakamura et al, 1993;Zhou, 2000;Placke et al, 2011aPlacke et al, , b, 2015.…”

Frequency spectra of horizontal winds in the mesosphere and lower thermosphere region from multistatic specular meteor radar observations during the SIMONe 2018 campaign

“…Lidar measurements of temperature, density and wind measurements are used to investigate GWs in the stratosphere and mesosphere (e.g., Chanin and Hauchecorne 1981;Gardner and Voelz 1987;Alexander et al 2011;Baumgarten 2010;Baumgarten et al 2015;Chen et al 2016;Kaifler et al 2017;Strelnikova et al 2020). Another technique to observe mesospheric GWs is the imaging of airglow emission layers, which provides information about spatial and temporal characteristics of the GWs (e.g., Swenson and Mende 1994;Medeiros et al 2003;Espy et al 2004;Vargas et al 2007Vargas et al , 2016Wüst et al 2017;Taylor et al 2019;Vargas 2019). Mesospherestratosphere-troposphere (MST), medium frequency (MF), incoherent scatter and specular meteor radars (SMRs) are some of the various types of radars utilized to estimate mean winds and correlations, from which it is possible to examine GWs and turbulence in the MLT region (e.g., Gage and Balsley 1984;Reid 1990;Nakamura et al 1993;Zhou 2000;Antonita et al 2008;Fritts et al 2010;Placke et al 2011aPlacke et al ,b, 2015Yasui et al 2016;Tsutsumi et al 2017;Reid et al 2018).…”