English
 
Privacy Policy Disclaimer
  Advanced SearchBrowse
  1. Item Summary / 
  2. View item

Item

ITEM ACTIONSEXPORT
 
 
DownloadE-Mail
 Local TagsRelease HistoryDetailsSummary
  A study of ionospheric dynamo currents using Swarm geomagnetic field measurements

Yamazaki, Y. (2023): A study of ionospheric dynamo currents using Swarm geomagnetic field measurements, XXVIII General Assembly of the International Union of Geodesy and Geophysics (IUGG) (Berlin 2023).
https://doi.org/10.57757/IUGG23-3673

Item is

 

show all hide all

Basic

show hide
Item Permalink: https://gfzpublic.gfz-potsdam.de/pubman/item/item_5020869 Version Permalink: https://gfzpublic.gfz-potsdam.de/pubman/item/item_5020869_1
Genre: Conference Paper

Files

show Files

Locators

show

Creators

show
hide
 Creators:
Yamazaki, Yosuke1, Author
Affiliations:
1IUGG 2023, General Assemblies, 1 General, International Union of Geodesy and Geophysics (IUGG), External Organizations, ou_5011304              

Content

show
hide
Free keywords: -
 Abstract: It is well known that ionospheric currents in the dynamo region (ca 90-150 km) are responsible for the daily variation of the geomagnetic field on the ground. The global-scale current system that dominates geomagnetic daily variations at middle and low latitudes is referred to as solar quiet (Sq). Geomagnetic signatures of Sq can be measured not only by ground-based magnetometers but also by magnetometers onboard low-Earth-orbit satellites. This presentation describes a recent effort to characterize Sq using high-precision magnetometer data from the Swarm mission. Internal and external equivalent Sq current systems are estimated based on the spherical harmonic analysis of Swarm geomagnetic field data. The internal Sq current system can be regarded as a superposition of ionospheric dynamo currents and induced underground currents. The external Sq current system at a satellite altitude (~500 km) is derived for the first time. The results suggest that the external Sq current system is due to interhemispheric field-aligned currents at low and middle latitudes.

Details

show
hide
Language(s): eng - English
 Dates: 2023-07-112023-07-11
 Publication Status: Finally published
 Pages: -
 Publishing info: -
 Table of Contents: -
 Rev. Type: -
 Identifiers: DOI: 10.57757/IUGG23-3673
 Degree: -

Event

show
hide
Title: XXVIII General Assembly of the International Union of Geodesy and Geophysics (IUGG)
Place of Event: Berlin
Start-/End Date: 2023-07-11 - 2023-07-20

Legal Case

show

Project information

show

Source 1

show
hide
Title: XXVIII General Assembly of the International Union of Geodesy and Geophysics (IUGG)
Source Genre: Proceedings
 Creator(s):
Affiliations:
Publ. Info: Potsdam : GFZ German Research Centre for Geosciences
Pages: - Volume / Issue: - Sequence Number: - Start / End Page: - Identifier: -