Identification

Title

Altitude extension of the NCAR-TIEGCM (TIEGCM-X) and evaluation

Abstract

The upper boundary height of the traditional community general circulation model of the ionosphere-thermosphere system is too low to be applied to the topside ionosphere/thermosphere study. In this study, the National Center for Atmospheric Research Thermosphere-Ionosphere-Electrodynamics General Circulation Model (NCAR-TIEGCM) was successfully extended upward by four scale heights from 400-600 km to 700-1,200 km depending on solar activity, named TIEGCM-X. The topside ionosphere and thermosphere simulated by TIEGCM-X agree well with the observations derived from a topside sounder and satellite drag data. In addition, the neutral density, temperature, and electron density simulated by TIEGCM-X are morphologically consistent with the NCAR-TIEGCM simulations before extension. The latitude-altitude distribution of the equatorial ionization anomaly derived from TIEGCM-X is more reasonable. During geomagnetic storm events, the thermospheric responses of TIEGCM-X are similar to NCAR-TIEGCM. However, the ionospheric storm effects in TIEGCM-X are stronger than those in NCAR-TIEGCM and are even opposites at some middle and low latitudes due to the presence of more closed magnetic field lines. Defense Meteorological Satellite Program observations prove that the ionospheric storm effect of TIEGCM-X is more reasonable. The well-validated TIEGCM-X has significant potential applications in ionospheric/thermospheric studies, such as the responses to storms, low-latitude dynamics, and data assimilation.

Resource type

document

Resource locator

Unique resource identifier

code

https://n2t.org/ark:/85065/d7t157hf

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

2022-11-01T00:00:00Z

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