Articles | Volume 36, issue 2
https://doi.org/10.5194/angeo-36-555-2018
© Author(s) 2018. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
Special issue:
https://doi.org/10.5194/angeo-36-555-2018
© Author(s) 2018. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
Regular paper
| 
03 Apr 2018
Regular paper |
| 03 Apr 2018
| 03 Apr 2018
Effects of solar activity and galactic cosmic ray cycles on the modulation of the annual average temperature at two sites in southern Brazil
Everton Frigo
CORRESPONDING AUTHOR
Universidade Federal do Pampa, Campus Caçapava do Sul,
Caçapava do Sul, Brazil
Francesco Antonelli
Universidade Federal do Pampa, Campus Caçapava do Sul,
Caçapava do Sul, Brazil
Djeniffer S. S. da Silva
Universidade Federal do Pampa, Campus Caçapava do Sul,
Caçapava do Sul, Brazil
Pedro C. M. Lima
Universidade Federal do Pampa, Campus Caçapava do Sul,
Caçapava do Sul, Brazil
Igor I. G. Pacca
Departamento de Geofísica, Instituto de Astronomia,
Geofísica e Ciências Atmosféricas, Universidade de São
Paulo, São Paulo, Brazil
José V. Bageston
Southern Regional Space Research Center, National Institute for Space
Research, Santa Maria, Brazil
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This study explores intense CGWs based on ground – based and multi – satellite observations over Southern Brazil, revealing significant airglow perturbations and strong momentum release. Triggered by deep convections and enabled by weaker wind field, these CGWs reached the mesopause and thermosphere. Consistent detections via OI and OH airglow emissions confirm their vertical propagation, while asymmetric thermosphere propagation is linked to Doppler-induced wavelength changes.
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This present work investigates the propagation dynamics and the sources–source mechanisms of quasi-monochromatic gravity waves (QMGWs) observed between April 2017 and April 2022 at São Martinho da Serra. The QMGW parameters were estimated using a 2D spectral analysis, and their source locations were identified using a backward ray-tracing model. Furthermore, the propagation conditions, sources, and source mechanisms of the QMGWs were extensively studied.
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