Scott McIntosh

What the Sudden Death of Solar Cycles Can Tell us About the Nature of the Solar Interior

140 year record of solar filaments
Monday, July 1, 2019

We observe the abrupt end of solar activity cycles at the Sun’s Equator by combining almost 140 years of observations from ground and space.

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.

The Extended Solar Cycle: Muddying the Waters of Solar/Stellar Dynamo Modeling Or Providing Crucial Observational

Graph depicting extended solar cycles
Monday, December 3, 2018

In 1844 Schwabe discovered that the number of sunspots increased and decreased over a period of about 11 years, that variation became known as the sunspot cycle.

Role of Interaction Between Magnetic Rossby Waves and Tachocline Differential Rotation in Producing Solar Seasons

Synoptic maps
Wednesday, January 24, 2018

Mausumi Dikpati presents a nonlinear magnetohydrodynamic shallow-water model for the solar tachocline (MHD-SWT) that generates quasi-periodic tachocline nonlinear oscillations (TNOs) that can be identified with the recently discovered solar 'seasons'.

Deciphering Solar Magnetic Activity: Spotting Solar Cycle 25

Comparing the evolution of the daily hemispheric sunspot number and a data-inspired representation of activity band polarity and migration image
Friday, June 9, 2017

We present observational signatures of solar cycle 25 onset. Those signatures are visibly following a migratory path from high to low latitudes.

Rossby Waves On The Sun

Rossby waves on the Sun
Friday, April 14, 2017

Space weather forecasting capability is six decades behind terrestrial weather forecasting," you will often hear at gatherings of scientists determined to understand the connections between our star and our home on Earth. It is an accurate statement in terms of capability.

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).

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