Identification

Title

A simulation study on the time delay of daytime thermospheric temperature response to the 27â€�day solar EUV flux variation

Abstract

In this study, the National Center for Atmospheric Research Thermosphere Ionosphere Electrodynamic General Circulation Model is used to explore the physical mechanisms of the time delay of daytime thermospheric temperature response to the 27-day solar extreme ultraviolet (EUV) flux variation. The contributions from different physical processes to the time delay of thermospheric temperature response, the peak perturbation of the thermospheric temperature with respect to the peak of 27-day solar EUV flux variation, were examined by diagnostically analyzing the thermospheric energy equation in a fixed local time frame. It was found that the time delay of the thermospheric temperature response to the 27-day solar EUV flux variation corresponds to the time needed for the total heating and cooling rates to be balanced. This time is slightly later than the times of the peaks of both the heating and cooling rates. Furthermore, the global circulation in the upper atmosphere plays a significant role in the delayed response of thermospheric temperature to solar EUV flux variations. Our simulation results show that the time delay of thermospheric temperature response to the 27-day solar EUV flux variation is about 0.5-0.8 day, depending on the amplitude of solar EUV flux variations.

Resource type

document

Resource locator

Unique resource identifier

code

http://n2t.net/ark:/85065/d7wd44jp

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

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South bounding latitude

Temporal reference

Temporal extent

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End position

Dataset reference date

date type

publication

effective date

2019-11-01T00:00:00Z

Frequency of update

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Conformity

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version of format

Constraints related to access and use

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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