NCAR High Altitude Observatory

Spectropolarimetric Insight into Plasma-Sheet Dynamics of a Solar Flare

Graphic of intensity and polarization data
Wednesday, February 12, 2020

We examine spectropolarimetric data from the CoMP instrument, acquired during the evolution of the September 10th 2017 X8.2 solar flare on the western solar limb. CoMP captured linearly polarized light from two emission lines of Fe XIII at 1074.7 and 1079.8 nm, from 1.03 to 1.5 solar radii.

Thermospheric composition O/N2 response to an altered meridional mean circulation during Sudden Stratospheric Warmings observed by GOLD

Graphic image of GOLD O/N2 ratios
Wednesday, February 12, 2020

GOLD measurements provide the first observational proof of model predictions that the break up of the stratospheric polar vortex changes the composition of the thermosphere.

Impacts of binning methods on high-latitude electrodynamic forcing: static vs boundary oriented binning methods

Graphic image of height-integrated Joule heating
Wednesday, February 12, 2020

The Earth’s atmosphere is coupled at high latitude to the magnetosphere. This is a crucial region since energy is put into the upper atmosphere of Earth and is redistributed globally.

Multiwavelength High-resolution Observations of Chromospheric Swirls in the Quiet Sun

Graphic image of chromospheric swirls
Wednesday, February 5, 2020

We report observations of small-scale swirls seen in the solar chromosphere. They are typically 2 Mm in diameter and last around 10 minutes.

HIWIND Observation of Summer Season Polar Cap Thermospheric Winds

Graphic image of HIWIND thermospheric winds
Wednesday, February 5, 2020

HIWIND (High altitude Interferometer WIND experiment) is a balloon borne Fabry Perot interferometer (FPI) for daytime thermospheric wind observations.

Interview with HAO's Anna Malanushenko

Photograph of Anna Malanushenko

I was born and raised on the Crimean peninsula on the northern coast of the Black Sea (Eastern Europe), an area currently disputed between Russia and Ukraine. In brief, I was born in a politically incorrect place.

Boulder scientists’ work key to astonishing images of sun’s surface

ViSP spectrograph system from from the DKIST

The highest resolution images of the solar surface ever seen were made possible to no small degree by the work of Boulder based scientists.

WHPI support of the PSP 4th Perihelion

WHPI logo image

During the upcoming 4th Parker Solar Probe (PSP) perihelion on January 29 2020, the Earth and many space observatories will be near-radially aligned with PSP and STEREO-A will be near quadrature (at a rig

Paul Bryans interviewed by Sun Superheroes

Photographic image of Solar Eclipse Team, Chile, 2019

Paul Bryans tells Sun Superheroes that a solar eclipse is an opportunity to understand and study the Sun's magnetism. During a solar eclipse, when the moon blocks the Sun, it allows scientists to study the strength and shape of the Sun's surrounding magnetic field.


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