Long-Term Solar Variability - LSV

Mausumi Dikpati Receives 2017 Wenner-Gren guest professorship award

Mausumi Dikpati portrait

Mausumi Dikpati of HAO has won a 2017 Wenner-Gren guest professorship award of Stockholm. This prestigious award is given annually to 6–8 scientists worldwide from all areas of science. About 30–50 scientists get nominated each year.

Beyond sunspots: Studies using the McIntosh Archive of global solar magnetic

Thursday, December 15, 2016

In 1964 (Solar Cycle 20; SC 20), Patrick McIntosh began creating hand-drawn synoptic maps of solar magnetic features, based on H-alpha images.

Whole Heliosphere Interval (WHI)

Sunday, January 1, 2012

The December, 2011 issue of Solar Physics was a Topical Issue on the Sun-Earth Connection near Solar Minimum.

Identifying the Beginnings and Ends of Solar Cycles

Sun surface simulations image
Wednesday, January 4, 2012

HAO scientist's Mausumi Dikpati, Peter Gilman, Giuliana de Toma, and UCLA professor Roger Ulrich find that the latitude at which plasma sinking occurs is very important.

TYING THE SUN TOGETHER

Star simulation image
Monday, February 6, 2012

Mark Miesch and colleagues Ben Brown (Univeristy of Wisconsin-Madison), Nick Nelson and Juri Toomre (University of Colorado-Boulder), and Allan Sacha Brun (National Center for Scientific Research, France) our making progress studying and connecting the solar dynamo and magnetic flux emergence.

Geomagnetic detection of the sectorial solar magnetic field and the historical peculiarity of minimum 23–24

Stackplot of solar-terrestrial data image
Wednesday, February 11, 2015

Recent work on historical recurrent geomagnetic activity and the peculiarity of the recent solar-cycle minimum, was chosen by the editors of AGU journals for special highlight.

Maria Weber received an AGU Outstanding Student Paper Award

Rising Flux Tubes image
Tuesday, May 1, 2012

HAO graduate fellow Maria Weber received an AGU Outstanding Student Paper Award for her talk titled, "Comparing simulations of rising flux tubes through the solar convection zone with observations of active region properties: Constraining the dynamo field strength".

Analyses of solar coronal prominence cavities

Composite image
Tuesday, October 16, 2012

Analyses of solar coronal prominence cavities by an international group of scientists including HAO's Sarah Gibson, Christian Bethge, Giuliana de Toma, Yuhong Fan, HAO visitor Urszula Bak Steslicka and University of Colorado graduate student Don Schmit, has been profiled in a

Improving Solar Dynamo Modeling

Kalman filtering image
Wednesday, February 11, 2015

Approximating a model’s “true” state by applying Kalman filtering to solar cycles, a technique first developed in the 1950s and 1960s to help Apollo 11 settle safely on the Moon.

Coronal and Heliospheric Evolution

The magnetic field in the Sun's atmosphere continuously evolves through processes of emergence, diffusion, and reconnection, resulting in ongoing reorganizations of the global coronal/helio- spheric magnetic morphology, as well as in the slow buildup of magnetic energy in twisted or sheared magnetic fields.

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