Space Weather

Tao Wang

Tao Wang is a scientific visitor in the High Altitude Observatory of the National Center for Atmospheric Research hosted by Dr. HanLi Liu. He is a Ph.D. student at Lanzhou University.

Large-scale ionospheric disturbances during the 17 March 2015 storm: A model-data comparative study

Graphic image of publication figure
Tuesday, March 24, 2020

Storm-induced ionospheric density variations are a major concern of near-Earth space environment as they could drastically disrupt satellite navigation and telecommunication systems.

Mausumi Dikpati Interviewed Live by Astronomy & Space

Photograph of Mausumi Dikpati, senior scientist at HAO

Mausumi Dikpati is a senior scientist at HAO. She studies the dynamics between Rossby waves and solar activity such as flares and coronal mass ejections (CMEs).

Daniela Lacatus

Delores Knipp and Jiajia Liu Awarded Prestigious Medals during the European Space Weather Week

Graphic Image from European Space Weather Week

Every year during the European Space Weather Week (ESWW), three international medals are given in the field of space weather. The Kristian Birkeland Medal, the Baron Marcel Nicolet Medal and the Alexander Chizhevsky Medal.

Space Weather: Big and Small, A Continuous Risk

Artistic rendering of the Sun and its atmosphere consist
Friday, May 10, 2019

"Space Weather" is the term used to describe the relentless barrage of particles that bathe the Earth and other planetary bodies of the solar system that originate in the steady evolution, and catastrophic breakdown, of magnetic structures on the Sun.

Three-dimensional modeling of chromospheric spectral lines in a simulated active region

Simulated images of Ca II 8542 Å, Ca II K, Mg II k, and H
Friday, May 3, 2019

Recently, the radiative magnetohydrodynamic (R-MHD) code MURaM was extended to include the corona. The code was used to simulate a bipolar active region with additional parasitic flux emergence near one of the sunspots that produced a flare.

A theoretical study of the responses of mesosphere and lower thermosphere (MLT) winds to geomagnetic storms at middle latitudes

Differences of meridional acceleration terms
Friday, May 3, 2019

In a recent work, we found that, in the mesosphere and lower thermosphere (MLT) region at middle latitudes, adiabatic heating/cooling and vertical heat advection, both associated with vertical wind changes, are the dominant processes that determine the temperature responses to storms.


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