Science Seminars

Gravity Waves and Their Influences on Atmospheric Coupling Using Satellite Observations and the ECMWF High-resolution Output

Speaker: Chihoko Cullens (UC Berkeley)
Date: Thursday, Jun 24, 2021
Time: 4:00 PM
Location: Zoom

Seminar Abstract:

Understanding atmospheric coupling from the troposphere/stratosphere to the upper atmosphere is important for improving climate simulations and space weather forecast. Gravity waves are one of the key elements for driving the atmospheric coupling from the troposphere/stratosphere to the mesosphere and lower thermosphere (MLT) region. Owing to uncertainties caused by gravity wave parameterizations in general circulation models (GCMs), it is important to advance our understanding and representation of gravity waves. Combine high-resolution models with various observations can reveal various aspects of  gravity wave variations. Studies of gravity wave variations from the long-time scale (solar cycle) to day-to-day variations (stratospheric sudden warming) in the lower atmosphere will be presented using high-resolution ECMWF output and TIMED-SABER, ICON-MIGHTI, and AIM-CIPS satellite observations. Gravity wave influences on vertical and inter-hemispheric coupling during stratospheric sudden warmings are further discussed using both high-resolution and general circulation models.