Identification

Title

SABER observation of stormâ€�time hemispheric asymmetry in nitric oxide radiative emission

Abstract

The nitric oxide (NO) 5.3 mu m radiative emission is the dominating and most efficient cooling agent in the thermosphere above 100 km. The NO 5.3 mu m radiative cooling is an important parameter, particularly during geomagnetic storm events, to quantify the energy budget within the magnetosphere-ionosphere-thermosphere system. We utilize the TIMED (Thermosphere-Ionosphere-Mesosphere Energetics and Dynamics)/SABER (Sounding of the Atmosphere using Broadband Emission Radiometry) observations of NO radiative cooling to investigate the storm-time hemispheric asymmetry during 2002-2018. The auxiliary parameters such as NO density, atomic oxygen density, thermospheric temperature, and the meridional wind are obtained from the TIEGCM (Thermosphere-Ionosphere-Electrodynamics General Circulation Model) simulations. We analyze the events that occurred close to (or during) the equinox periods to get rid of the effect of seasonal asymmetry. The TIEGCM-simulated NO density and meridional wind show hemispheric asymmetry during geomagnetic storm event. Almost no hemispheric variation in TIEGCM-atomic oxygen and -thermospheric temperature is noticeable. The SABER-observed and the TIEGCM-simulated radiative flux exhibits higher values in the northern and southern hemispheres, respectively, during the events close to (or during) March and September equinox. Our analysis shows that the storm-time meridional wind could play an important role resulting in the hemispheric asymmetry by changing the density and temperature.

Resource type

document

Resource locator

Unique resource identifier

code

http://n2t.net/ark:/85065/d7r49v6s

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

2021-04-01T00:00:00Z

Frequency of update

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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