Middle Atmosphere Vertical Coupling Analys
Medium Frequency Radar
Medium Frequency Radar
The Medium Frequency (MF) radar at Rothera Research Station measures an altitude profile of the horizontal wind in the mesosphere, between 55 and 95 km.
There has been a Medium Frequency (MF) radar operating at Rothera since 1997, providing uninterrupted data from 2002. This long-term dataset spans more than a solar cycle and provides crucial insights into the dynamics of the middle atmosphere above the Antarctic Peninsula.
Radar observations help researchers understand how the middle atmosphere interacts with both the lower atmosphere and space weather phenomena. These interactions include vertical coupling processes, where changes in the troposphere and stratosphere influence mesospheric dynamics, and vice versa.
The radar measures winds in the mesosphere, between approximately 60 and 100 km altitude. It works by transmitting radio waves that illuminate patches of ionised gas. The receiver antennas then detect the reflected signals and track their movement across the sky. This allows for the measurement of both the strength and direction of high atmospheric winds.
Rothera’s radar is part of a broader Antarctic network, alongside similar systems at Syowa and Davis, supporting collaborative research into polar middle-atmosphere dynamics and their coupling with both lower atmospheric processes and space weather.
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