WACCM

Quiet-time Day-to-day Variability of Equatorial Vertical E×B Drift from Atmosphere Perturbations at Dawn

Graphic image of variability vertical ExB drift
Friday, March 20, 2020

The ionosphere is different from one day to the next, even under geomagnetic and solar quiet condition. The vertical E×B drift at the geomagnetic equator is a key parameter that influences the state of the ionosphere and atmosphere.

Interhemispheric Coupling Mechanisms in the Middle Atmosphere of WACCM6

Graphic depicting three WACCM realizations
Tuesday, January 7, 2020

Simulations with the Community Earth System Model 2 using the Whole Atmosphere Community Climate Model configuration, known as CESM2(WACCM6), show evidence of dynamical coupling from the high latitudes of the winter middle atmosphere to the tropics and the middle and high latitudes of the summer

Solar Flare Effects on 150-km Echoes Observed Over Jicamarca: WACCM-X Simulations

Figure of 150-km echoes and WACCM-X simulated electron densities during the solar flare
Thursday, October 31, 2019

A puzzling feature of the Earth’s equatorial upper atmosphere is the occurrence of enhanced VHF radar echoes near 150-km altitude. These so-called 150-km echoes have been observed for over 50-years, and occur nearly every day, making them a persistent feature of the equatorial ionosphere.

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