Identification

Title

A comparison study of NO cooling between TIMED/SABER measurements and TIEGCM simulations

Abstract

We investigate the latitudinal and longitudinal variations of thermospheric nitric oxide (NO) cooling rate from 2005 to 2016. We compare the maximum of the NO cooling rate and its altitude from measurements by the Sounding of the Atmosphere using Broadband Emission Radiometry (SABER) instrument on National Aeronautics and Space Administration (NASA)'s TIMED (Thermosphere-Ionosphere-Mesosphere Energetics and Dynamics) satellite and from simulations by the Thermosphere-Ionosphere-Electrodynamics General Circulation Model (TIEGCM). In both data and model, the maximum NO cooling rate varies with similar to 11-year solar cycle, while the altitude of the peak value does not. At local noon, the maximum NO cooling rate from TIEGCM is significantly larger than that derived from SABER, especially in solar minimum. There are differences in the altitudes of the maximum NO cooling rates between the observations and simulations. The largest difference occurs at noon at low latitudes, with SABER values exceeding TIEGCM values by more than 10 km with a maximum difference of 16 km near solar maximum. Model sensitivity tests suggest that the biases are caused by a model temperature overestimation in the low thermosphere, and tides in the TIEGCM lower boundary play an important role in inducing the low-latitude temperature overestimation by the model. In addition, SABER's height-integrated cooling rate (NO flux) exceeds that from TIEGCM, primarily due to the lower cooling rates at 140-200 km in the model.

Resource type

document

Resource locator

Unique resource identifier

code

https://n2t.org/ark:/85065/d72v2k22

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

2018-10-13T00:00:00Z

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