Modeling

The Molecular Oxygen Density Structure of the Lower Thermosphere as Seen by GOLD and Models

Panels a, b, c, d with blue and red data points
Friday, June 17, 2022

This paper compares new observations from the Global-scale Observations of Limb and Disk (GOLD) mission of molecular oxygen (O2) in the lower thermosphere (130 - 200 km in altitude) to widely used models in the aeronomy community.

Haonan Wu

Haonan Wu is a graduate student in the Department of Physics and Astronomy at Clemson University. His research focuses on the ionosphere-thermosphere interactions during magnetic storm time using numerical models.

The dimmest state of the Sun

A and B line graphs depicting measured and modelled total solar irradiance
Tuesday, March 1, 2022

How the solar electromagnetic energy entering the Earth’s atmosphere varied since pre-industrial times is an important consideration in the climate change debate.

Efficient numerical treatment of ambipolar and Hall drift as hyperbolic system

6 graphs showing a two-dimensional test simulation setup
Wednesday, February 23, 2022

Partially ionized plasmas, such as the solar chromosphere, require a generalized Ohm's law including the effects of ambipolar and Hall drift.

The Impact of Solar Activity on Forecasting the Upper Atmosphere via Assimilation of Electron Density Data

Geographic latitude and altitude distribution
Friday, August 13, 2021

This study presents a comprehensive comparison of the impact of solar activity on forecasting the upper atmosphere through assimilation of radio occultation (RO)-derived electron density (Ne) into a physics-based model (TIE-GCM) using an ensemble Kalman filter.

Magnetofrictional Modeling of an Erupting Pseudostreamer

3D magnetic eld evolution of an erupting pseudostreamer
Friday, August 13, 2021

In this study, we present a magnetic conguration of an erupting pseudostreamer observed on April 19, 2015 on the Southwest limb embedding a prominence cavity. The eruption resulted in a relatively wide CME with a round front and prominence core intersected by a sharp plume.

NO transport via Lagrangian Coherent Structures into the top of the polar vortex

Daily average WACCMX+DART NO profiles
Tuesday, July 13, 2021

The energetic particle precipitation (EPP) indirect effect (IE) refers to the downward transport of reactive odd nitrogen (NOx=NO+NO2) produced by EPP (EPP-NOx) from the polar winter mesosphere and lower thermosphere to the stratosphere where it can destroy ozone.

Post-midnight O+ Depletions Observed by ICON: Data/Model Comparison

Data/Model Comparison
Wednesday, June 30, 2021

The NASA Ionosphere Connection explorer was launched in October 2019 with the goal of understanding the transition from Earth's atmosphere to space by measuring key quantities at low latitudes.

Data-Driven Ensemble Modeling of Equatorial Ionospheric Electrodynamics

Graphic depicting root-mean-square difference of the plasma drift
Thursday, February 4, 2021

A Case Study During a Minor Storm Period Under Solar Minimum Conditions: The dayside equatorial ionospheric electrodynamics exhibits strong variability driven simultaneously by highly changeable external forcings that originate from the Sun, magnetosphere, and lower atmosphere.

Migrating Semidiurnal Tide during the September Equinox Transition in the Northern Hemisphere

Graphic depicting migrating semidiurnal tide
Thursday, January 28, 2021

Specified Dynamics Whole Atmosphere Community Climate Model with thermosphere-ionosphere eXtension (SD-WACCMX) simulations are used to investigate the solar migrating semidiurnal tide (SW2) around September equinox at middle to high latitudes in the Northern Hemisphere.

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