Results 101 to 110 of about 1,392 (166)

Development and Validation of the Whole Atmosphere Community Climate Model With Thermosphere and Ionosphere Extension (WACCM‐X 2.0)

Journal of Advances in Modeling Earth Systems, 2018
Key developments have been made to the NCAR Whole Atmosphere Community Climate Model with thermosphere and ionosphere extension (WACCM‐X). Among them, the most important are the self‐consistent solution of global electrodynamics, and transport of O+ in ...
Han‐Li Liu, Charles G. Bardeen, Benjamin T. Foster, Peter Lauritzen, Jing Liu, Gang Lu, Daniel R. Marsh, Astrid Maute, Joseph M. McInerney, Nicholas M. Pedatella, Liying Qian, Arthur D. Richmond, Raymond G. Roble, Stanley C. Solomon, Francis M. Vitt, Wenbin Wang   +15 more
doaj   +1 more source

Estimation of Neutral Densities in the Thermosphere

, 2017
Ionospheric energy balance is studied with incoherent scatter radar measurements that allow the estimation of neutral density and temperature from a statistical inversion problem. This method has been successfully studied at low latitudes using data over several years to make a robust model.
openaire   +1 more source

High‐Latitude Electrodynamics and Thermospheric Density Variations During the 2024 Gannon Storm

Space Weather
This study investigates high‐latitude electrodynamics and thermospheric density variations during the 2024 Gannon's storm. First, the auroral precipitation module of Auroral Spectra and High‐Latitude Electric field variabilitY, ASHLEY‐A, is improved to ...
Qingyu Zhu, Sarah Vines, Marc Hairston, Yun‐Ju Chen, Phillip Anderson, Cheng Sheng, Yue Deng   +6 more
doaj   +1 more source

Pathways of F region thermospheric mass density enhancement via soft electron precipitation

, 2015
©2015. American Geophysical Union. All Rights Reserved. The efficiencies of pathways of thermospheric heating via soft electron precipitation in the dayside cusp region are investigated using the coupled magnetosphere-ionosphere-thermosphere model (CMIT)
W. Wang, J. G. Lyon, R. H. Varney, Lei, J., J. Lei, Lotko, W., W. Lotko, Brambles, O. J., B. Zhang, Varney, R. H., Zhang, B., Wang, W., O. J. Brambles, Wiltberger, M., Lyon, J. G., M. Wiltberger   +15 more
core   +1 more source

Improving orbit prediction via thermospheric density calibration

, 2023
The uncertainty on Thermospheric Mass Density (TMD), as derived from atmospheric models, can reach extremely high values. This effect is noteworthy in Low Earth Orbit (LEO), where atmospheric drag is the main perturbing force, as well as the most ...
Callejon Cantero, M. (author), Pastor-Rodriguez, A. (author), Siemes, C. (author)   +2 more
core   +1 more source

Machine Learning Based Modeling of Thermospheric Mass Density

Space Weather
In this study, we propose a machine learning based approach to construct an empirical model of thermospheric mass densities, based on the MultiLayer Perceptron and bi‐directional Long Short‐Term Memory for ensemble learning model (MBiLE). The MBiLE model
Qian Pan, Chao Xiong, Hermann Lühr, Artem Smirnov, Yuyang Huang, Chunyu Xu, Xu Yang, Yunliang Zhou, Yang Hu   +8 more
doaj   +1 more source

The response of the thermospheric density to auroral heating during geomagnetic disturbances

, 1971
Thermospheric density response to auroral heating during geomagnetic ...
Mayr, H. G., Volland, H.
core  

Thermospheric density estimation and responses to the March 2013 geomagnetic storm from GRACE GPS-determined precise orbits

, 2017
The thermospheric mass density variations and the thermosphere-ionosphere coupling during geomagnetic storms are not clear due to lack of observables and large uncertainty in the models.
Shuanggen Jin, Andres Calabia
core   +1 more source

Thermospheric Density, Composition, and Temperature From GOES‐R/SUVI Solar Occultations

Space Weather
A new data set of atomic oxygen (O) and molecular nitrogen (N2) number density profiles, along with thermospheric temperature profiles between 180 and 500 km, has been developed.
R. H. A. Sewell, E. M. B. Thiemann, J. Lafyatis, K. Hallock, C. Bethge, M. Pilinski, E. K. Sutton, C. L. Peck, D. B. Seaton   +8 more
doaj   +1 more source

Evaluation of the Exospheric Temperature Modeling From Different Empirical Orthogonal Functions

Space Weather
In this paper, we constructed the Exospheric Temperature Models (ETM) on the basis of CHAMP and GRACE data using different empirical orthogonal functions (EOFs). The EOFs of the exospheric temperature can be derived either from satellite data directly or
Xu Yang, Libin Weng, Jiuhou Lei, Xiaoqian Zhu, Haibing Ruan, Dexin Ren, Zhongli Li, Ruoxi Li, Liangjie Chen   +8 more
doaj   +1 more source