Validation of SABER v2.0 Operational Temperature Data With Ground‐Based Lidars 
in the Mesosphere‐Lower Thermosphere Region (75–105 km)

Dawkins, E. C. M.; Feofilov, A.; Rezac, Ladislav; Kutepov, A. A.; Janches, D.; Höffner, J.; Chu, X.; Lu, X.; Mlynczak, M. G.; Russel III, J.

doi:10.1029/2018JD028742

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Validation of SABER v2.0 Operational Temperature Data With Ground‐Based Lidars in the Mesosphere‐Lower Thermosphere Region (75–105 km)

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Rezac, Ladislav
Department Planets and Comets, Max Planck Institute for Solar System Research, Max Planck Society;

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Zitation

Dawkins, E. C. M., Feofilov, A., Rezac, L., Kutepov, A. A., Janches, D., Höffner, J., et al. (2018). Validation of SABER v2.0 Operational Temperature Data With Ground‐Based Lidars in the Mesosphere‐Lower Thermosphere Region (75–105 km). Journal of Geophysical Research: Atmospheres, 123(17), 9916-9934. doi:10.1029/2018JD028742.

Zitierlink: https://hdl.handle.net/21.11116/0000-0003-C26D-8

Zusammenfassung

The National Aeronautics and Space Administration (NASA) Thermosphere Ionosphere Mesosphere Energetics and Dynamics (TIMED) Sounding of the Atmosphere using Broadband Radiometry (SABER) instrument performs near‐global measurements of the vertical kinetic temperature (T_k) profiles and volume mixing ratios of various trace species (including O₃, CO₂, and H₂O), with data available from 2002 to present. In this work, the first comparative study of the latest publically available SABER version 2.0 operational retrieval is reported in order to assess the performance of satellite T_k profiles relative to high‐resolution ground‐based lidar profiles. Collocated multiyear seasonal average T_k profiles were compared at nine different locations, representing a variety of different latitudes. In general, the SABER v2.0 and lidar mean seasonal T_k profiles agree well, with the smallest absolute values of ΔT_k (z) (SABER minus lidar) found between 85 and 95 km, where the respective SABER and lidar uncertainties were smallest. At altitudes ≥100 km, the SABER T_k (z) typically exhibited warmer temperatures relative to the lidar T_k (z) profiles, whereas for altitudes ≤85 km, SABER T_k (z) was cooler. Relative to lidar, SABER tends to exhibit a warm bias during high‐latitude summertime, with the reasons for this currently still unclear. Overall, SABER was able to reproduce the general latitude‐ and season‐specific variations in the lidar T_k profiles and shown to be statistically similar for most seasons, at most locations, for the majority of altitudes, and with no overall bias.