3-dimensional winds and impacts of the typhoon observed in the MLT region using the Chinese multistatic meteor radar network

We present the first continuous observations of the three-dimensional winds in the mesosphere and lower thermosphere (MLT) of the northern hemisphere midlatitudes using the composite data from the first multistatic meteor radar network in China. Our continuous observations started in 2022. In the summer of 2023, typhoon Doksuri passed through China and resulted in intense rainfalls. To reveal the impact of the typhoon on the MLT region, we focus on the variability in the three-dimensional wind fields. The horizontal winds are retrieved using an improved Volume Velocity Processing (VVP) with coordinate transformation and non-linear constraints to minimize errors, and the vertical winds are retrieved from the horizontal divergence with magnitudes of less than 1m/s. We found that on the day when the typhoon passed through our meteor radar network, the horizontal winds strengthened southwest and contained small-scale waves, and the vertical winds showed no significant change.