Determining the Origin of Tidal Oscillations in the Ionospheric Transition Region With EISCAT Radar and Global Simulation Data

F. Günzkofer; D. Pokhotelov; G. Stober; H. L. Liu; H. L. Liu; N. J. Mitchell; A. Tjulin; C. Borries

doi:10.1029/2022JA030861

Determining the Origin of Tidal Oscillations in the Ionospheric Transition Region With EISCAT Radar and Global Simulation Data

F. Günzkofer, D. Pokhotelov, G. Stober, H. L. Liu, H. L. Liu, N. J. Mitchell, A. Tjulin, C. Borries

Department of Electronic & Electrical Engineering

Research output: Contribution to journal › Article › peer-review

6 Citations (SciVal)

Abstract

At high-latitudes, diurnal and semidiurnal variations of temperature and neutral wind velocity can originate both in the lower atmosphere (UV or infrared absorption) and in the thermosphere-ionosphere (ion convection, EUV absorption). Determining the relative impact of different forcing mechanisms gives insight to the vertical coupling in the ionosphere. We analyze measurements from the incoherent scatter radar (ISR) facility operated by the EISCAT Scientific Association. They are complemented by meteor radar data and compared to global circulation models. The amplitudes and phases of tidal oscillations are determined by an adaptive spectral filter (ASF). Measurements indicate the existence of strong semidiurnal oscillations in a two-band structure at altitudes ≲110 and ≳130 km, respectively. Analysis of several model runs with different input settings suggest the upper band to be forced in situ while the lower band corresponds to upward-propagating tides from the lower atmosphere. This indicates the existence of an unexpectedly strong, in situ forcing mechanism for semidiurnal oscillations in the high-latitude thermosphere. It is shown that the actual transition of tides in the altitude region between 90 and 150 km is more complex than described so far.

Original language	English
Article number	e2022JA030861
Journal	Journal of Geophysical Research: Space Physics
Volume	127
Issue number	10
Early online date	30 Sept 2022
DOIs	https://doi.org/10.1029/2022JA030861
Publication status	Published - 31 Oct 2022

Bibliographical note

Funding Information:
The authors would like to acknowledge the following data sources: EISCAT is an international association supported by research organizations in China (CRIRP), Finland (SA), Japan (NIPR and ISEE), Norway (NFR), Sweden (VR), and the United Kingdom (UKRI). For this study, a data set from the Ground-to-topside model of Atmosphere and Ionosphere for Aeronomy (GAIA) project carried out by the National Institute of Information and Communications Technology (NICT), Kyushu University, and Seikei University was used. The WACCM-X model has been developed at NCAR (see https://www2.hao.ucar.edu/modeling/waccm-x). The TIEGCM and related Thermosphere-Ionosphere models have been developed by the “Atmosphere Ionosphere Magnetosphere” (AIM) Section of the High Altitude Observatory (HAO) at NCAR (see https://www.hao.ucar.edu/modeling/tgcm/). The TIEGCM data was generated on the “Kratos” High-Performance Data Analysis Cluster (HPDA). The GSWM data has been obtained from the HAO UCAR website https://www2.hao.ucar.edu/gswm-global-scale-wave-model. H. Liu acknowledges support from JSPS KAKENHI grants 18H01270, 17KK0095, 20H00197, and JRPs-LEAD with DFG (JPJSJPR 20181602). G. Stober is a member of the Oeschger Center for Climate Change Research. Open Access funding enabled and organized by Projekt DEAL.

Funding Information:
The authors would like to acknowledge the following data sources: EISCAT is an international association supported by research organizations in China (CRIRP), Finland (SA), Japan (NIPR and ISEE), Norway (NFR), Sweden (VR), and the United Kingdom (UKRI). For this study, a data set from the Ground‐to‐topside model of Atmosphere and Ionosphere for Aeronomy (GAIA) project carried out by the National Institute of Information and Communications Technology (NICT), Kyushu University, and Seikei University was used. The WACCM‐X model has been developed at NCAR (see https://www2.hao.ucar.edu/modeling/waccm‐x ). The TIEGCM and related Thermosphere‐Ionosphere models have been developed by the “Atmosphere Ionosphere Magnetosphere” (AIM) Section of the High Altitude Observatory (HAO) at NCAR (see https://www.hao.ucar.edu/modeling/tgcm/ ). The TIEGCM data was generated on the “Kratos” High‐Performance Data Analysis Cluster (HPDA). The GSWM data has been obtained from the HAO UCAR website https://www2.hao.ucar.edu/gswm‐global‐scale‐wave‐model . H. Liu acknowledges support from JSPS KAKENHI grants 18H01270, 17KK0095, 20H00197, and JRPs‐LEAD with DFG (JPJSJPR 20181602). G. Stober is a member of the Oeschger Center for Climate Change Research. Open Access funding enabled and organized by Projekt DEAL.

Funding

The authors would like to acknowledge the following data sources: EISCAT is an international association supported by research organizations in China (CRIRP), Finland (SA), Japan (NIPR and ISEE), Norway (NFR), Sweden (VR), and the United Kingdom (UKRI). For this study, a data set from the Ground-to-topside model of Atmosphere and Ionosphere for Aeronomy (GAIA) project carried out by the National Institute of Information and Communications Technology (NICT), Kyushu University, and Seikei University was used. The WACCM-X model has been developed at NCAR (see https://www2.hao.ucar.edu/modeling/waccm-x). The TIEGCM and related Thermosphere-Ionosphere models have been developed by the “Atmosphere Ionosphere Magnetosphere” (AIM) Section of the High Altitude Observatory (HAO) at NCAR (see https://www.hao.ucar.edu/modeling/tgcm/). The TIEGCM data was generated on the “Kratos” High-Performance Data Analysis Cluster (HPDA). The GSWM data has been obtained from the HAO UCAR website https://www2.hao.ucar.edu/gswm-global-scale-wave-model. H. Liu acknowledges support from JSPS KAKENHI grants 18H01270, 17KK0095, 20H00197, and JRPs-LEAD with DFG (JPJSJPR 20181602). G. Stober is a member of the Oeschger Center for Climate Change Research. Open Access funding enabled and organized by Projekt DEAL. The authors would like to acknowledge the following data sources: EISCAT is an international association supported by research organizations in China (CRIRP), Finland (SA), Japan (NIPR and ISEE), Norway (NFR), Sweden (VR), and the United Kingdom (UKRI). For this study, a data set from the Ground‐to‐topside model of Atmosphere and Ionosphere for Aeronomy (GAIA) project carried out by the National Institute of Information and Communications Technology (NICT), Kyushu University, and Seikei University was used. The WACCM‐X model has been developed at NCAR (see https://www2.hao.ucar.edu/modeling/waccm‐x ). The TIEGCM and related Thermosphere‐Ionosphere models have been developed by the “Atmosphere Ionosphere Magnetosphere” (AIM) Section of the High Altitude Observatory (HAO) at NCAR (see https://www.hao.ucar.edu/modeling/tgcm/ ). The TIEGCM data was generated on the “Kratos” High‐Performance Data Analysis Cluster (HPDA). The GSWM data has been obtained from the HAO UCAR website https://www2.hao.ucar.edu/gswm‐global‐scale‐wave‐model . H. Liu acknowledges support from JSPS KAKENHI grants 18H01270, 17KK0095, 20H00197, and JRPs‐LEAD with DFG (JPJSJPR 20181602). G. Stober is a member of the Oeschger Center for Climate Change Research. Open Access funding enabled and organized by Projekt DEAL.

ASJC Scopus subject areas

Geophysics
Space and Planetary Science

Access to Document

10.1029/2022JA030861Licence: CC BY

Cite this

@article{09320ba1fa1b45fdaa580c7dbb36f578,

title = "Determining the Origin of Tidal Oscillations in the Ionospheric Transition Region With EISCAT Radar and Global Simulation Data",

abstract = "At high-latitudes, diurnal and semidiurnal variations of temperature and neutral wind velocity can originate both in the lower atmosphere (UV or infrared absorption) and in the thermosphere-ionosphere (ion convection, EUV absorption). Determining the relative impact of different forcing mechanisms gives insight to the vertical coupling in the ionosphere. We analyze measurements from the incoherent scatter radar (ISR) facility operated by the EISCAT Scientific Association. They are complemented by meteor radar data and compared to global circulation models. The amplitudes and phases of tidal oscillations are determined by an adaptive spectral filter (ASF). Measurements indicate the existence of strong semidiurnal oscillations in a two-band structure at altitudes ≲110 and ≳130 km, respectively. Analysis of several model runs with different input settings suggest the upper band to be forced in situ while the lower band corresponds to upward-propagating tides from the lower atmosphere. This indicates the existence of an unexpectedly strong, in situ forcing mechanism for semidiurnal oscillations in the high-latitude thermosphere. It is shown that the actual transition of tides in the altitude region between 90 and 150 km is more complex than described so far.",

author = "F. G{\"u}nzkofer and D. Pokhotelov and G. Stober and Liu, {H. L.} and Liu, {H. L.} and Mitchell, {N. J.} and A. Tjulin and C. Borries",

note = "Funding Information: The authors would like to acknowledge the following data sources: EISCAT is an international association supported by research organizations in China (CRIRP), Finland (SA), Japan (NIPR and ISEE), Norway (NFR), Sweden (VR), and the United Kingdom (UKRI). For this study, a data set from the Ground-to-topside model of Atmosphere and Ionosphere for Aeronomy (GAIA) project carried out by the National Institute of Information and Communications Technology (NICT), Kyushu University, and Seikei University was used. The WACCM-X model has been developed at NCAR (see https://www2.hao.ucar.edu/modeling/waccm-x). The TIEGCM and related Thermosphere-Ionosphere models have been developed by the “Atmosphere Ionosphere Magnetosphere” (AIM) Section of the High Altitude Observatory (HAO) at NCAR (see https://www.hao.ucar.edu/modeling/tgcm/). The TIEGCM data was generated on the “Kratos” High-Performance Data Analysis Cluster (HPDA). The GSWM data has been obtained from the HAO UCAR website https://www2.hao.ucar.edu/gswm-global-scale-wave-model. H. Liu acknowledges support from JSPS KAKENHI grants 18H01270, 17KK0095, 20H00197, and JRPs-LEAD with DFG (JPJSJPR 20181602). G. Stober is a member of the Oeschger Center for Climate Change Research. Open Access funding enabled and organized by Projekt DEAL. Funding Information: The authors would like to acknowledge the following data sources: EISCAT is an international association supported by research organizations in China (CRIRP), Finland (SA), Japan (NIPR and ISEE), Norway (NFR), Sweden (VR), and the United Kingdom (UKRI). For this study, a data set from the Ground‐to‐topside model of Atmosphere and Ionosphere for Aeronomy (GAIA) project carried out by the National Institute of Information and Communications Technology (NICT), Kyushu University, and Seikei University was used. The WACCM‐X model has been developed at NCAR (see https://www2.hao.ucar.edu/modeling/waccm‐x ). The TIEGCM and related Thermosphere‐Ionosphere models have been developed by the “Atmosphere Ionosphere Magnetosphere” (AIM) Section of the High Altitude Observatory (HAO) at NCAR (see https://www.hao.ucar.edu/modeling/tgcm/ ). The TIEGCM data was generated on the “Kratos” High‐Performance Data Analysis Cluster (HPDA). The GSWM data has been obtained from the HAO UCAR website https://www2.hao.ucar.edu/gswm‐global‐scale‐wave‐model . H. Liu acknowledges support from JSPS KAKENHI grants 18H01270, 17KK0095, 20H00197, and JRPs‐LEAD with DFG (JPJSJPR 20181602). G. Stober is a member of the Oeschger Center for Climate Change Research. Open Access funding enabled and organized by Projekt DEAL. ",

year = "2022",

month = oct,

day = "31",

doi = "10.1029/2022JA030861",

language = "English",

volume = "127",

journal = "Journal of Geophysical Research: Space Physics ",

issn = "2169-9380",

publisher = "Wiley-Blackwell",

number = "10",

}

TY - JOUR

T1 - Determining the Origin of Tidal Oscillations in the Ionospheric Transition Region With EISCAT Radar and Global Simulation Data

AU - Günzkofer, F.

AU - Pokhotelov, D.

AU - Stober, G.

AU - Liu, H. L.

AU - Mitchell, N. J.

AU - Tjulin, A.

AU - Borries, C.

N1 - Funding Information: The authors would like to acknowledge the following data sources: EISCAT is an international association supported by research organizations in China (CRIRP), Finland (SA), Japan (NIPR and ISEE), Norway (NFR), Sweden (VR), and the United Kingdom (UKRI). For this study, a data set from the Ground-to-topside model of Atmosphere and Ionosphere for Aeronomy (GAIA) project carried out by the National Institute of Information and Communications Technology (NICT), Kyushu University, and Seikei University was used. The WACCM-X model has been developed at NCAR (see https://www2.hao.ucar.edu/modeling/waccm-x). The TIEGCM and related Thermosphere-Ionosphere models have been developed by the “Atmosphere Ionosphere Magnetosphere” (AIM) Section of the High Altitude Observatory (HAO) at NCAR (see https://www.hao.ucar.edu/modeling/tgcm/). The TIEGCM data was generated on the “Kratos” High-Performance Data Analysis Cluster (HPDA). The GSWM data has been obtained from the HAO UCAR website https://www2.hao.ucar.edu/gswm-global-scale-wave-model. H. Liu acknowledges support from JSPS KAKENHI grants 18H01270, 17KK0095, 20H00197, and JRPs-LEAD with DFG (JPJSJPR 20181602). G. Stober is a member of the Oeschger Center for Climate Change Research. Open Access funding enabled and organized by Projekt DEAL. Funding Information: The authors would like to acknowledge the following data sources: EISCAT is an international association supported by research organizations in China (CRIRP), Finland (SA), Japan (NIPR and ISEE), Norway (NFR), Sweden (VR), and the United Kingdom (UKRI). For this study, a data set from the Ground‐to‐topside model of Atmosphere and Ionosphere for Aeronomy (GAIA) project carried out by the National Institute of Information and Communications Technology (NICT), Kyushu University, and Seikei University was used. The WACCM‐X model has been developed at NCAR (see https://www2.hao.ucar.edu/modeling/waccm‐x ). The TIEGCM and related Thermosphere‐Ionosphere models have been developed by the “Atmosphere Ionosphere Magnetosphere” (AIM) Section of the High Altitude Observatory (HAO) at NCAR (see https://www.hao.ucar.edu/modeling/tgcm/ ). The TIEGCM data was generated on the “Kratos” High‐Performance Data Analysis Cluster (HPDA). The GSWM data has been obtained from the HAO UCAR website https://www2.hao.ucar.edu/gswm‐global‐scale‐wave‐model . H. Liu acknowledges support from JSPS KAKENHI grants 18H01270, 17KK0095, 20H00197, and JRPs‐LEAD with DFG (JPJSJPR 20181602). G. Stober is a member of the Oeschger Center for Climate Change Research. Open Access funding enabled and organized by Projekt DEAL.

PY - 2022/10/31

Y1 - 2022/10/31

N2 - At high-latitudes, diurnal and semidiurnal variations of temperature and neutral wind velocity can originate both in the lower atmosphere (UV or infrared absorption) and in the thermosphere-ionosphere (ion convection, EUV absorption). Determining the relative impact of different forcing mechanisms gives insight to the vertical coupling in the ionosphere. We analyze measurements from the incoherent scatter radar (ISR) facility operated by the EISCAT Scientific Association. They are complemented by meteor radar data and compared to global circulation models. The amplitudes and phases of tidal oscillations are determined by an adaptive spectral filter (ASF). Measurements indicate the existence of strong semidiurnal oscillations in a two-band structure at altitudes ≲110 and ≳130 km, respectively. Analysis of several model runs with different input settings suggest the upper band to be forced in situ while the lower band corresponds to upward-propagating tides from the lower atmosphere. This indicates the existence of an unexpectedly strong, in situ forcing mechanism for semidiurnal oscillations in the high-latitude thermosphere. It is shown that the actual transition of tides in the altitude region between 90 and 150 km is more complex than described so far.

AB - At high-latitudes, diurnal and semidiurnal variations of temperature and neutral wind velocity can originate both in the lower atmosphere (UV or infrared absorption) and in the thermosphere-ionosphere (ion convection, EUV absorption). Determining the relative impact of different forcing mechanisms gives insight to the vertical coupling in the ionosphere. We analyze measurements from the incoherent scatter radar (ISR) facility operated by the EISCAT Scientific Association. They are complemented by meteor radar data and compared to global circulation models. The amplitudes and phases of tidal oscillations are determined by an adaptive spectral filter (ASF). Measurements indicate the existence of strong semidiurnal oscillations in a two-band structure at altitudes ≲110 and ≳130 km, respectively. Analysis of several model runs with different input settings suggest the upper band to be forced in situ while the lower band corresponds to upward-propagating tides from the lower atmosphere. This indicates the existence of an unexpectedly strong, in situ forcing mechanism for semidiurnal oscillations in the high-latitude thermosphere. It is shown that the actual transition of tides in the altitude region between 90 and 150 km is more complex than described so far.

UR - http://www.scopus.com/inward/record.url?scp=85142627654&partnerID=8YFLogxK

U2 - 10.1029/2022JA030861

DO - 10.1029/2022JA030861

M3 - Article

AN - SCOPUS:85142627654

SN - 2169-9380

VL - 127

JO - Journal of Geophysical Research: Space Physics

JF - Journal of Geophysical Research: Space Physics

IS - 10

M1 - e2022JA030861

ER -

Determining the Origin of Tidal Oscillations in the Ionospheric Transition Region With EISCAT Radar and Global Simulation Data

Abstract

Bibliographical note

Funding

ASJC Scopus subject areas

Access to Document

Other files and links

Fingerprint

Cite this