Identification

Title

Prompt ionospheric/magnetospheric responses 29 October 2003 Halloween storm: Outflow and energization

Abstract

3D multifluid simulations of the 29 October 2003 Halloween storm show the event to be a good example of conditions which lead to prompt penetration of solar wind electric field into the magnetosphere and prompt acceleration of heavy ionospheric ions. Causal relationships are established that tie solar wind conditions to ionospheric/magnetospheric responses, and the results are correlated with features in both IMAGE/HENA data and AMIE cross-polar cap potential. The simulations are able to capture the AMIE potentials. Difference between model results and AMIE data can be attributed to the ability of the model to capture fast enhancements in the convective electric field that can be tied with the IMF variations. The total auroral currents show a smoother profile, with the magnetosphere acting like an inductor. A period of southward IMF with simultaneous rapid By rotation leads to the largest currents and ionospheric outflows. These outflows produce an initial ionospheric mass loading of the magnetosphere and originate from the dayside cusp/cleft region. During this period the energization of O+ lags that of H+, consistent with that seen in the HENA data. Once the ionospheric outflows mass load the magnetosphere, prompt acceleration of O+ is seen simultaneous with H+ acceleration. This prompt response is due to the acceleration of O+ ions that have previously flowed into the magnetosphere. The enhanced convective electric field, also leads to enhanced ionospheric outflows that resupply ionospheric ions into the magnetosphere. During this period of resupply, the nightside auroral zone becomes an important contributor to the outflows.

Resource type

document

Resource locator

Unique resource identifier

code

https://n2t.org/ark:/85065/d7q240fp

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

2008-06-10T00:00:00Z

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