Space Weather

Origins of the Ambient Solar Wind: Implication for Space Weather

Carrington rotation stack plots
Thursday, September 7, 2017

The Sun’s outer atmosphere is heated to temperatures of millions of degrees, and solar plasma flows out into interplanetary space at supersonic speeds. This paper reviews our current understanding of these interrelated problems: coronal heating and the acceleration of the ambient solar wind.

A Study of Large Wind Shears Near the Mesopause and the Tropopause

Vertical profiles of maximum wind shear
Thursday, April 13, 2017

The NCAR Whole Atmosphere Community Climate Model (WACCM), with a quasi-uniform horizontal resolution of $\sim$25km and a vertical resolution of 0.1 scale height, produces large horizontal winds and vertical shears maximizing in the mesosphere and lower thermosphere (MLT), similar to those found

Solar Energetic Particle Alerts from a Coronagraph

Space Weather Jan 2017 journal cover
Thursday, February 16, 2017

In this NASA-led study, we report the concept of using near-real time observations from a coronagraph to provide early warning of a fast coronal mass ejection (CME) and the possible onset of a solar energetic particle (SEP) event.

Keeping an Eye on Space Weather

Delores Knipp and Geomagnetic Storms

In The Conversation newsletter, scientists Delores Knipp and Brett Carter explore the significance of severe geomagnetic storm events and their impact on communications technology through descriptive historical accounts.

Effects of Magnetospheric Lobe Cell Convection on Dayside Upper Thermospheric Winds at High Latitudes

Average ionospheric potential and DMSP F-16 ion drift observations
Tuesday, October 4, 2016

This paper investigates a possible physical mechanism of the observed dayside high-latitude upper thermospheric wind using numerical simulations from the coupled magnetosphere-ionosphere-thermosphere (CMIT) model.

Kevin Dalmasse and Space Weather Forcasting

Kevin Dalmasse is currently finishing a 2-year postdoc jointly funded by CISL and an Air Force grant from HAO Senior Scientist, Sarah Gibson.

May 1967 Great Storm and Radio Disruption Event

The flare image in Hydrogen-alpha emission (Image courtesy of NSO).
Friday, August 5, 2016

Although listed as one of the most significant events of the last 80 years, the space weather storm of late May 1967 has been of mostly fading academic interest.

Lisa Upton, A Scientific Dynamo!

Lisa Upton

Lisa is a Visiting Scientist at HAO and also is currently working for Space Systems Research Corporation. In the spring of 2017, Lisa will begin a NSF postdoctoral fellowship at HAO, working as a collaborator with the dynamo group.

Paul Bryans

Paul is a Project Scientist in the High Altitude Observatory at NCAR. He received his PhD on the spectral emission of non-Maxwellian plasmas from the University of Strathclyde in the UK in 2005.

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