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Chromosphere

About the Mauna Loa Solar Observatory

MLSO domes

The Physical Origin & Magnetic Sensitivity of the Scattering Polarization Observed in the O I IR Triplet at 777 nm

Response functions to a horizontal 1 G magnetic field of the emergent Q linear scattering polarization
Monday, January 9, 2017

The linearly polarized solar limb spectrum caused by the absorption and scattering of anisotropic radiation has a very rich diagnostic potential, given its sensitivity to the thermal, dynamic and magnetic structure of the solar atmosphere.

On the Connection between Propagating Solar Coronal Disturbances and Chromospheric Footpoints

SDO/AIA 171Å sub-fields
Wednesday, September 14, 2016

The Interface Region Imaging Spectrograph (IRIS) provides an unparalleled opportunity to explore the (thermal) interface between the chromosphere, transition region, and the coronal plasma observed by the Atmospheric Imaging Assembly (AIA) of the Solar Dynamics Observatory (SDO).

Giuliana de Toma

Submitted by whawkins on July 25, 2016 - 3:47pm

Giuliana de Toma is a Project Scientist in the High Altitude Observatory of NCAR specializing in solar cycle variability and its influence on the corona and heliosphere.

A Tale of Two Emergences

Evolution figure
Wednesday, July 13, 2016

In June 2013, the two scientific instruments onboard the second Sunrise mission witnessed, in detail, a small-scale magnetic flux emergence event as part of the birth of an active region.

Tanausu del Pino Aleman

Submitted by whawkins on July 12, 2016 - 3:36pm

Tanausu del Pino Aleman is a visitor in the High Altitude Observatory for the National Center for Atmospheric Research. His primary research interests are in spectroscopy and solar spectro-polarimetry.

COSMO

Solar Transients and Space Weather

Overview and Research Goal

CHIP Full Resolution Movies Online

Submitted by kolinski on March 14, 2014 - 3:50pm

High resolution movies of CHIP data are now available in the data summary pages.

ChroMag Optics Testing

Submitted by kolinski on January 13, 2014 - 3:39pm

The Chromospheric and Prominence Magnetometer (ChroMag) prototype optics under test on a lab bench at HAO. Monochromatic green light is being passed through 88mm of calcite. This is the thickest stage in ChroMag. The fringes are used to test the alignment of the optical elements and the crystal axes. ChroMag is one of the planned suite of three instruments of HAO’s Coronal Magnetism Solar Observatory (COSMO), and will be used for solar physics research and space weather applications.

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The National Center for Atmospheric Research is sponsored by the National Science Foundation. Any opinions, findings and conclusions or recommendations expressed in this publication are those of the author(s) and do not necessarily reflect the views of the National Science Foundation.