Identification

Title

Improving the thermosphere ionosphere in a whole atmosphere model by assimilating GOLD disk temperatures

Abstract

Global-Scale Observations of Limb and Disk (GOLD) disk measurements of far ultraviolet molecular nitrogen band emissions are used to retrieve column integrated disk temperatures (T-disk), which are representative of the lower-and-middle thermosphere. The present work develops a new approach to assimilate the T-disk in the whole atmosphere community climate model with thermosphere-ionosphere eXtension using the data assimilation research testbed ensemble adjustment Kalman filter. Nine days of data, 1-9 November 2018, are assimilated. Analysis state variables such as thermospheric effective temperature (T-eff, airglow layer integrated temperature), ratio of atomic oxygen to molecular nitrogen column densities (O/N-2), and column electron content are compared with a control simulation that is only constrained up to similar to 50 km. It is observed that assimilation of the GOLD T-disk improves the analysis states when compared with the control simulation. The analysis and model states, particularly, T-eff, O/N-2, and electron column density (ECD) are compared with their measurement counterparts for a validation of the assimilation. T-eff and O/N-2 are compared with GOLD T-disk and O/N-2. While, the ECD is compared with ground based total electron content measurements from global navigational satellite system receivers. Root mean square error (RMSE) improvements in T-eff and O/N-2 are about 10.8% and 22.6%, respectively. The RMSE improvement in analyses ECD is about 10% compared to the control simulation.

Resource type

document

Resource locator

Unique resource identifier

code

http://n2t.net/ark:/85065/d71v5jk6

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

2022-03-01T00:00:00Z

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