The subject of this review is the atmospheric chemistry of the metals which ablate from
meteoroids in the Earth, s upper atmosphere. The major meteoric species are Fe, Mg, Si …

We report the first simultaneous lidar observations of thermosphere‐ionosphere sporadic
nickel and Na (TISNi and TISNa) layers in altitudes∼ 105–120 km over Yanqing (40.42° N …

Characteristics of the sporadic sodium layers (SSLs or Na S) in different latitudes and
altitudes are summarized in this paper and the possible mechanisms are discussed. The …

Mesospheric Green emissions from excited Oxygen in Sprite Tops (ghosts) are infrequent
and faint greenish transient luminous events that remain for hundreds of milliseconds on top …

We report the first lidar observations of regular occurrence of mid‐latitude thermosphere‐
ionosphere Na (TINa) layers over Boulder (40.13° N, 105.24° W), Colorado. Detection of …

Vertical constituent transport is characterized by solving the continuity equation for a minor
species in the presence of waves, turbulence, molecular diffusion, and chemical sources …

We present the first coordinated study using two lidars at two separate locations to
characterize a 1 h mesoscale gravity wave event in the mesopause region. The …

A high-efficiency lidar receiver architecture that emphasizes boosting the receiver collection
efficiency of resonance-fluorescence and Doppler lidars has opened up new avenues of …

The downward fluxes of Fe and Na, measured near the mesopause with the University of
Colorado lidars near Boulder, and a chemical ablation model developed at the University of …

Vertical chemical transport occurs when the density fluctuations of a species, caused by
perturbations of its chemistry, are strongly correlated with the vertical wind fluctuations …