In a recent work, we found that, in the mesosphere and lower thermosphere (MLT) region at middle latitudes, adiabatic heating/cooling and vertical heat advection, both associated with vertical wind changes, are the dominant processes that determine the temperature responses to storms.
The specification and prediction of density changes in the thermosphere is a key challenge for space weather observations and modeling, because it is one result of complex interactions between the Sun and the terrestrial atmosphere, and also because it is of operational importance for tracking ob
Finally, after repeated postponements due to unfavorable weather conditions, HiWind launched from Esrange Space Center, Kiruna, Sweden, on Sunday, June 24. The HiWIND team arrived in early May 2018.
The NASA Global-scale Observations of the Limb and Disk (GOLD) mission was launched into orbit on January 25, 2018 as a commercially hosted payload on the SES-14 communications satellite. There were anxious moments following lift-off when mission control lost contact with the satellite.
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.
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
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.
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.
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.