- document
-
Zhu, Qingyu (author), Lu, Gang (author), Lei, Jiuhou (author), Deng, Yue (author), Doornbos, E.N. (author), van den IJssel, J.A.A. (author), Siemes, C. (author)The thermospheric neutral density response to the 7–9 September 2017 storms is investigated based on the Swarm satellite observations and the thermosphere-ionosphere-electrodynamic general circulation model (TIEGCM) simulation. The Swarm data depicted a prominent interhemispheric asymmetry (IHA) in the afternoon sector during the second storm...journal article 2023
- document
-
Sheng, Cheng (author), Lu, Gang (author), Solomon, Stanley C. (author), Wang, Wenbin (author), Doornbos, E.N. (author), Hunt, Linda A. (author), Mlynczak, Martin G. (author)Thermospheric temperature and density recovery during the 5 April 2010 geomagnetic storm has been investigated in this study. Neutral density recovery as revealed by Thermosphere-Ionosphere-Electrodynamics General Circulation Model (TIEGCM) simulations was slower than observations from GOCE, CHAMP, and GRACE satellites, suggesting that the...journal article 2017
- document
-
Häusler, K. (author), Hagan, M.E. (author), Forbes, J.M. (author), Zhang, X. (author), Doornbos, E. (author), Bruinsma, S. (author), Lu, G. (author)In this paper, we provide insights into limitations imposed by current satellite-based strategies to delineate tidal variability in the thermosphere, as well as the ability of a state-of-the-art model to replicate thermospheric tidal determinations. Toward this end, we conducted a year-long thermosphere-ionosphere-mesosphere-electrodynamics...journal article 2015
- document
-
Lu, G. (author), Hagan, M.E. (author), Häusler, K. (author), Doornbos, E.N. (author), Bruinsma, S. (author), Anderson, B.J. (author), Korth, H. (author)We present a case study of the 5 April 2010 geomagnetic storm using observations and numerical simulations. The event was driven by a fast-moving coronal mass ejection and despite being a moderate storm with a minimum Dst near ?50 nT, the event exhibited elevated thermospheric density and surges of traveling atmospheric disturbances (TADs) more...journal article 2014
- document
-
Häusler, K. (author), Hagan, M.E. (author), Baumgaertner, A.J.G. (author), Maute, A. (author), Lu, G. (author), Doornbos, E.N. (author), Bruinsma, S. (author), Forbes, J.M. (author), Gasperini, F. (author)We report on a new source of tidal variability in the National Center for Atmospheric Research thermosphere-ionosphere-mesosphere-electrodynamics general circulation model (TIME-GCM). Lower boundary forcing of the TIME-GCM for a simulation of November–December 2009 based on 3-hourly Modern-Era Retrospective Analysis for Research and Application ...journal article 2014