Quantifying the Daytime, Equatorial ExB Velocities Associated with the 4-cell Non-migrating Tidal Structure
Abstract
This AFOSR grant dealt with three, fundamentally-important questions related to understanding the daytime, equatorial ExB drift velocities associated with the 4-cell, non-migrating tidal structures. The three important questions that were addressed 1.) How sharp are the longitude gradients in daytime, vertical ExB drift velocities that define the boundaries of each of the 4 cells, 2.) Is the 4-cell pattern in ExB drifts observed on a day-to-day basis? and 3.) Can a theoretical model such as the Whole Atmosphere Model (WAM) produce the observed sharp longitudinal gradients in ExB drift velocities? It was found that the longitude gradients in ExB drift velocities were extremely sharp and varied between 1 m/sec/degree and -4 m/sec/degree longitude and these gradients were observed on a day-to-day basis. The WAM model was not able to reproduce such large gradients, but did reproduce the 4-cell structure in daytime, vertical ExB drift velocities.
Document Details
- Document Type
- Technical Report
- Publication Date
- May 29, 2012
- Accession Number
- ADA580396
Entities
People
- David N. Anderson
- Eduardo Araujo-pradere
- Mariangel Fedrizzi
Organizations
- University of Colorado Boulder