Regensburg 2016 – wissenschaftliches Programm

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UP: Fachverband Umweltphysik

UP 4: Poster Session

UP 4.15: Poster

Dienstag, 8. März 2016, 16:00–17:30, Foyer H41

A comparison of 10 year mesospheric and lower thermospheric wind determined by meteor and MF radar at 69°N. — •Sven Wilhelm, Gunter Stober, and Jorge Luis Chau — Leibniz Institute of Atmospheric Physics at the Rostock University, Kühlungsborn, Germany

Since the year 2004 we measure continuously information about the mesospheric and lower thermospheric dynamics by operating the MF SAURA and the Andenes meteor radar (SMR) at northern Norway(69°N, 16°E). Here we present a comparison of the derived winds between both radar systems in order to quantify potential biases between the observations. In order to understand the gravity wave forcing at mesospheric altitudes it is essential to measure the wind velocity with the highest possible accuracy. As there is an overlap between 78-100 km of the observation altitudes it is possible to investigate potential altitude dependent differences in order to derive to access an altitude ceiling for the MF radars due to the increasing background electron density. Our results indicate that here is a strong dependence of the wind agreement with altitude. The highest correlation is reached for altitudes between 80 * 88 km taking values of 0.60 * 0.70. Above 88 km the correlation decreases rapidly and shows almost no correlation at altitudes above 98 km.