Thermospheric Heating and Cooling Times During Geomagnetic Storms, Including Extreme Events

We present the first quantitative calculations of thermospheric heating and cooling times for geomagnetic storms of different intensity, including extreme events. We utilize the neutral mass density database of the CHAllenging Mini‐satellite Payload and Gravity Recovery And Climate Experiment missio...

Full description

Saved in:
Bibliographic Details
Published in:Geophysical research letters 2019-11, Vol.46 (22), p.12739-12746
Main Authors: Zesta, Eftyhia, Oliveira, Denny M.
Format: Article
Language:English
Subjects:
Cooling
Cooling effects
Coronal mass ejection
extreme geomagnetic storms
Extreme weather
Geomagnetic storms
Geomagnetism
Geophysics
GRACE (experiment)
Gravity
Heating
Heating and cooling
Magnetic storms
Mathematical analysis
Space missions
Spacecraft recovery
Storms
superposed epoch density
Thermosphere
thermosphere cooling
thermosphere heating
Thermospheric heating
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:We present the first quantitative calculations of thermospheric heating and cooling times for geomagnetic storms of different intensity, including extreme events. We utilize the neutral mass density database of the CHAllenging Mini‐satellite Payload and Gravity Recovery And Climate Experiment missions to produce thermospheric global system response to geomagnetic storms caused by coronal mass ejections via superposed epoch analysis during May 2001 to December 2015. Storm events are grouped in five different categories based on the minimum value of the SYM‐H index. We calculate the time from storm onset for the thermosphere to reach maximum intensification (heating time) and the time from onset for the thermosphere to recover (cooling time). We find that heating and cooling times decrease as storm intensity increases and the effect is more pronounced for the cooling times. For extreme storms, the thermospheric heating time is 9.5 hr, while the cooling time is 22 hr.
ISSN:0094-8276
1944-8007
DOI:10.1029/2019GL085120