Evaluation of the Empirical Scaling Factor of Joule Heating Rates in TIE‐GCM With EISCAT Measurements
Abstract Joule heating is one of the main energy inputs into the thermosphere‐ionosphere system. Precise modeling of this process is essential for any space weather application. Existing thermosphere‐ionosphere models tend to underestimate the actual Joule heating rate quite significantly. The Therm...
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American Geophysical Union (AGU)
2024
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ftdoajarticles:oai:doaj.org/article:7f209b06b7104bbd9dc2d5ab075717c6 2024-09-15T18:04:29+00:00 Evaluation of the Empirical Scaling Factor of Joule Heating Rates in TIE‐GCM With EISCAT Measurements Florian Günzkofer Huixin Liu Gunter Stober Dimitry Pokhotelov Claudia Borries 2024-04-01T00:00:00Z https://doi.org/10.1029/2023EA003447 https://doaj.org/article/7f209b06b7104bbd9dc2d5ab075717c6 EN eng American Geophysical Union (AGU) https://doi.org/10.1029/2023EA003447 https://doaj.org/toc/2333-5084 2333-5084 doi:10.1029/2023EA003447 https://doaj.org/article/7f209b06b7104bbd9dc2d5ab075717c6 Earth and Space Science, Vol 11, Iss 4, Pp n/a-n/a (2024) Joule heating incoherent scatter radar ionosphere model polar plasma convection Astronomy QB1-991 Geology QE1-996.5 article 2024 ftdoajarticles https://doi.org/10.1029/2023EA003447 2024-08-05T17:49:32Z Abstract Joule heating is one of the main energy inputs into the thermosphere‐ionosphere system. Precise modeling of this process is essential for any space weather application. Existing thermosphere‐ionosphere models tend to underestimate the actual Joule heating rate quite significantly. The Thermosphere‐Ionosphere‐Electrodynamics General‐Circulation‐Model applies an empirical scaling factor of 1.5 for compensation. We calculate vertical profiles of Joule heating rates from approximately 2,220 hr of measurements with the EISCAT incoherent scatter radar and the corresponding model runs. We investigate model runs with the plasma convection driven by both the Heelis and the Weimer model. The required scaling of the Joule heating profiles is determined with respect to the Kp index, the Kan‐Lee merging electric field EKL, and the magnetic local time. Though the default scaling factor of 1.5 appears to be adequate on average, we find that the required scaling varies strongly with all three parameters ranging from 0.46 to ∼20 at geomagnetically disturbed and quiet times, respectively. Furthermore, the required scaling is significantly different in runs driven by the Heelis and Weimer model. Adjusting the scaling factor with respect to the Kp index, EKL, the magnetic local time, and the choice of convection model would reduce the difference between Joule heating rates calculated from measurement and model plasma parameters. Article in Journal/Newspaper EISCAT Directory of Open Access Journals: DOAJ Articles Earth and Space Science 11 4 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
Joule heating incoherent scatter radar ionosphere model polar plasma convection Astronomy QB1-991 Geology QE1-996.5 |
spellingShingle |
Joule heating incoherent scatter radar ionosphere model polar plasma convection Astronomy QB1-991 Geology QE1-996.5 Florian Günzkofer Huixin Liu Gunter Stober Dimitry Pokhotelov Claudia Borries Evaluation of the Empirical Scaling Factor of Joule Heating Rates in TIE‐GCM With EISCAT Measurements |
topic_facet |
Joule heating incoherent scatter radar ionosphere model polar plasma convection Astronomy QB1-991 Geology QE1-996.5 |
description |
Abstract Joule heating is one of the main energy inputs into the thermosphere‐ionosphere system. Precise modeling of this process is essential for any space weather application. Existing thermosphere‐ionosphere models tend to underestimate the actual Joule heating rate quite significantly. The Thermosphere‐Ionosphere‐Electrodynamics General‐Circulation‐Model applies an empirical scaling factor of 1.5 for compensation. We calculate vertical profiles of Joule heating rates from approximately 2,220 hr of measurements with the EISCAT incoherent scatter radar and the corresponding model runs. We investigate model runs with the plasma convection driven by both the Heelis and the Weimer model. The required scaling of the Joule heating profiles is determined with respect to the Kp index, the Kan‐Lee merging electric field EKL, and the magnetic local time. Though the default scaling factor of 1.5 appears to be adequate on average, we find that the required scaling varies strongly with all three parameters ranging from 0.46 to ∼20 at geomagnetically disturbed and quiet times, respectively. Furthermore, the required scaling is significantly different in runs driven by the Heelis and Weimer model. Adjusting the scaling factor with respect to the Kp index, EKL, the magnetic local time, and the choice of convection model would reduce the difference between Joule heating rates calculated from measurement and model plasma parameters. |
format |
Article in Journal/Newspaper |
author |
Florian Günzkofer Huixin Liu Gunter Stober Dimitry Pokhotelov Claudia Borries |
author_facet |
Florian Günzkofer Huixin Liu Gunter Stober Dimitry Pokhotelov Claudia Borries |
author_sort |
Florian Günzkofer |
title |
Evaluation of the Empirical Scaling Factor of Joule Heating Rates in TIE‐GCM With EISCAT Measurements |
title_short |
Evaluation of the Empirical Scaling Factor of Joule Heating Rates in TIE‐GCM With EISCAT Measurements |
title_full |
Evaluation of the Empirical Scaling Factor of Joule Heating Rates in TIE‐GCM With EISCAT Measurements |
title_fullStr |
Evaluation of the Empirical Scaling Factor of Joule Heating Rates in TIE‐GCM With EISCAT Measurements |
title_full_unstemmed |
Evaluation of the Empirical Scaling Factor of Joule Heating Rates in TIE‐GCM With EISCAT Measurements |
title_sort |
evaluation of the empirical scaling factor of joule heating rates in tie‐gcm with eiscat measurements |
publisher |
American Geophysical Union (AGU) |
publishDate |
2024 |
url |
https://doi.org/10.1029/2023EA003447 https://doaj.org/article/7f209b06b7104bbd9dc2d5ab075717c6 |
genre |
EISCAT |
genre_facet |
EISCAT |
op_source |
Earth and Space Science, Vol 11, Iss 4, Pp n/a-n/a (2024) |
op_relation |
https://doi.org/10.1029/2023EA003447 https://doaj.org/toc/2333-5084 2333-5084 doi:10.1029/2023EA003447 https://doaj.org/article/7f209b06b7104bbd9dc2d5ab075717c6 |
op_doi |
https://doi.org/10.1029/2023EA003447 |
container_title |
Earth and Space Science |
container_volume |
11 |
container_issue |
4 |
_version_ |
1810441976607145984 |