Identification

Title

Impacts of ionospheric conductance on magnetosphere‐ionosphere coupling

Abstract

Understanding the consequence of the complex interplay between solar flare and geomagnetic storm on the magnetosphere-ionosphere (M-I) coupling is a critical aspect to space weather research. This is the first attempt to simulate the concurrent solar flare and geomagnetic storm effects on M-I coupling using the state-of-art geospace model which integrates Lyon-Fedder-Mobarry -Thermosphere-Ionosphere-Electrodynamics General Circulation Model -the Rice Convection ring current Model (LTR) in a self-consistent way. Our results indicate that dayside E-region electron density enhancements peak nearly at the same time as the flare and these electron density enhancements at middle latitudes are not very sensitive to storm forcing. F-region electron densities also have an immediate response to solar flares but take longer to recover compared to E-region ionosphere, and dayside F-region electron density enhancements are more prominent for more stormy conditions. These dayside middle-latitude F-region enhancements intensify tongue of ionization in the polar cap region. Both E- and F-region electron density increases contribute to polar ionosphere conductance enhancements that have both local and global consequences. Flare-induced conductance enhancements tend to reduce the amount of Joule dissipation into upper atmosphere and cross polar cap potential around solar flare peak (12:00 UT), and increase dayside field aligned currents and Joule dissipation afterward (12:20-13:30 UT). These effects are more appreciable for stronger solar wind driving conditions. These simulation results provide important references for interpreting observed solar activity/cycle dependence of magnetosphere-ionosphere coupling phenomena.

Resource type

document

Resource locator

Unique resource identifier

code

http://n2t.net/ark:/85065/d7t72nd0

codeSpace

Dataset language

eng

Spatial reference system

code identifying the spatial reference system

Classification of spatial data and services

Topic category

geoscientificInformation

Keywords

Keyword set

keyword value

Text

originating controlled vocabulary

title

Resource Type

reference date

date type

publication

effective date

2016-01-01T00:00:00Z

Geographic location

West bounding longitude

East bounding longitude

North bounding latitude

South bounding latitude

Temporal reference

Temporal extent

Begin position

End position

Dataset reference date

date type

publication

effective date

2023-02-01T00:00:00Z

Frequency of update

Quality and validity

Lineage

Conformity

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name of format

version of format

Constraints related to access and use

Constraint set

Use constraints

Limitations on public access

None

Responsible organisations

Responsible party

contact position

OpenSky Support

organisation name

UCAR/NCAR - Library

full postal address

PO Box 3000

Boulder

80307-3000

email address

opensky@ucar.edu

web address

http://opensky.ucar.edu/

name: homepage

responsible party role

pointOfContact

Metadata on metadata

Metadata point of contact