Identification

Title

GOLD observations of longitudinal variations in the nighttime Equatorial Ionization Anomaly (EIA) crests' latitudes

Abstract

Each day the Global-scale Observations of the Limb and Disk imager observes the equatorial ionization anomaly (EIA) near sunset from similar to 10 degrees E to similar to 80 degrees W geographic longitude. Most images cover similar to 45 degrees of longitude (similar to 3 hr), and most longitudes are observed multiple times. Monthly averages of EIA crests' latitude (EIA lats) versus longitude during March, September, and December 2020 have been analyzed. The EIA lats reflect the combined influence of winds, solar radiation, and fields (electric and magnetic) in the equatorial region. Winter solstice differs significantly from the equinoxes, which are similar, but there are notable similarities between all three. The similarities in the EIA lats during the seasons examined indicates that the magnetic equator to subsolar point separation influences them in all three seasons and that it has a more distinct, possibly more significant, influence than winds on the average latitudes.Plain Language Summary Each day the Global-scale Observations of the Limb and Disk imager observes the nighttime equatorial ionization anomaly (EIA) near sunset as the terminator progresses westward from Africa to across South America. Most images cover similar to 45 degrees of longitude (similar to 3 hr of local time), and most longitudes are observed multiple times. In 2020 seasonal averages of the crests' latitude versus longitude during the equinoxes (March and September) and winter solstice (December) show significant, important similarities. The observed latitude versus longitude dependence in all three show a dependence on the distance between the magnetic equator and the subsolar point. Greater knowledge of the seasonal-longitudinal dependence of the EIA crests' latitudes contributes significantly to understanding the crests' response to fields (electric and magnetic) and winds in the equatorial region.

Resource type

document

Resource locator

Unique resource identifier

code

http://n2t.net/ark:/85065/d7765k8w

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

2023-04-01T00:00:00Z

Frequency of update

Quality and validity

Lineage

Conformity

Data format

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