Cheng-Yun Yang

First observations of solar zenith angle modulation of diurnal tidal structure in the MLT region

A global climatology of diurnal tides in the mesosphere and lower thermosphere (MLT) is constructed using multiyear observations from fifteen meteor radars distributed worldwide. The results show that diurnal tidal amplitudes are strongest at low and mid-latitudes (10–50° N/S), with peak values of about 60 m s −1 n...

Ozone downward flux revealed by high-resolution differential absorption lidar over Tibet during stratosphere-troposphere exchange

Ozone downward flux revealed by high-resolution differential absorption lidar over Tibet during stratosphere-troposphere exchange

This study characterizes a prominent ozone intrusion event driven by stratosphere-to-troposphere exchange (STE) that occurred on 18–19 October 2017. The analysis is enabled by high spatiotemporal resolution ozone profile observations from the USTC Ozone Lidar deployed at Yangbajing, Tibet (29° N, 99° E). The high-spa...

Seasonal nonlinear controls on semidiurnal tides at the southern high latitudes of Mars

Thermal tides are a fundamental component of Martian atmospheric variability and play a key role in the vertical coupling between the lower and middle atmosphere. Semidiurnal tides are of particular interest at high latitudes, where background wind conditions favor their vertical propagation and polar-orbiting spacecra...