Identification

Title

A numerical study of nighttime ionospheric variations in the American sector during 28-29 October 2003

Abstract

Variations of nighttime F-2 peak height (h(m)F(2)) over the American sector during the 28-29 October 2003 storm period were investigated using the National Center for Atmospheric Research Thermosphere-Ionosphere Electrodynamics Global Circulation Model. The model was generally able to reproduce the ionospheric variations on 28-29 October 2003 observed by the ionosondes. A series of controlled model simulations were subsequently undertaken to examine the effects of electric fields and neutral winds on the ionosphere. The numerical experiments suggest that the dramatic nighttime increase of h(m)F(2) on the storm day 29 October is mainly caused by traveling atmospheric disturbances (TADs) from the high latitudes of the Northern Hemisphere. However, the electric field plays an important role in causing the elevation of h(m)F(2) in the equatorial region. The prompt penetration electric field (PPEF) associated with the southward component of the interplanetary magnetic field (B-z) is westward on the nightside, whereas when B-z reverses and becomes northward, the PPEF is westward in the premidnight and turns to eastward in the postmidnight. These PPEFs greatly affect the low-latitude ionosphere during storm time. On 28 October, even though the B-z disturbance was weak with a short duration of southward B-z, the TADs from the Southern Hemisphere can propagate to the Northern Hemisphere and result in the corresponding oscillations in the nightside h(m)F(2).

Resource type

document

Resource locator

Unique resource identifier

code

http://n2t.net/ark:/85065/d7gt5px1

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

2016-09-01T00:00:00Z

Frequency of update

Quality and validity

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Conformity

Data format

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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