Identification

Title

Numerical modeling of the large-scale neutral and plasma responses to the body forces created by the dissipation of gravity waves from 6 h of deep convection in Brazil

Abstract

We study the response of the thermosphere and ionosphere to gravity waves (GWs) excited by 6 h of deep convection in Brazil on the evening of 01 October 2005 via the use of convective plume, ray trace, and global models. We find that primary GWs excited by convection having horizontal wavelengths of λH∼70–300 km, periods of 10–60 min, and phase speeds of cH∼50–225 m/s propagate well into the thermosphere. Their density perturbations are ƿ√p ~15 – 25% at z∼150 km and are negligible at z>300 km. The dissipation of these GWs creates spatially and temporally localized body forces with amplitudes of 0.2– 1.0 m/s2at z∼120–230 km. These forces generate two counter-rotating circulation cells with horizontal velocities of 50–350 m/s. They also excite secondary GWs; those resolved by our global model have λH∼4000–5000 km and cH∼500–600 m/s. These secondary GWs propagate globally and have ƿ√p ~10 – 25% and 5–15% at z=250 and 375 km, respectively. These forces also create plasma perturbations of foF2′∼0.2–1.0 MHz, TEC′∼0.4– 1.5 TECU (total electron content unit, 1TECU  =10¹⁶ elm⁻²), and hmF2′∼5–50 km. The large-scale traveling ionospheric disturbances (LSTIDs) induced by the secondary GWs have amplitudes of foF2′∼0.2–0.5 MHz, TEC′∼0.2– 0.6 TECU, and hmF2′∼5–10 km. In a companion paper, we discuss changes to the prereversal enhancement and plasma drift from these forces.

Resource type

document

Resource locator

Unique resource identifier

code

https://n2t.org/ark:/85065/d7xw4kp0

codeSpace

Dataset language

eng

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code identifying the spatial reference system

Classification of spatial data and services

Topic category

geoscientificInformation

Keywords

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keyword value

Text

originating controlled vocabulary

title

reference date

date type

publication

effective date

2016-01-01T00:00:00Z

Geographic location

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East bounding longitude

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Dataset reference date

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publication

effective date

2013-05-21T00:00:00Z

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Use constraints

Copyright 2013 American Geophysical Union.

Limitations on public access

None

Responsible organisations

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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

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 date

2025-12-26T03:45:23.038722

Metadata language