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ANGEO | Articles | Volume 37, issue 6
Ann. Geophys., 37, 1005–1024, 2019
https://doi.org/10.5194/angeo-37-1005-2019
© Author(s) 2019. This work is distributed under
the Creative Commons Attribution 4.0 License.

Special issue: 7th Brazilian meeting on space geophysics and aeronomy

Ann. Geophys., 37, 1005–1024, 2019
https://doi.org/10.5194/angeo-37-1005-2019
© Author(s) 2019. This work is distributed under
the Creative Commons Attribution 4.0 License.

Regular paper 08 Nov 2019

Regular paper | 08 Nov 2019

Climatology of intermediate descending layers (or 150 km echoes) over the equatorial and low-latitude regions of Brazil during the deep solar minimum of 2009

Ângela Machado dos Santos et al.

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Cited articles

Abdu, M. A., Batista, I. S., Kantor, I. J., and Sobral, J. H. A.: Gravity Wave Induced Ionization Layers in the Night F-Region at Low Latitudes, J. Atmos. Sol.-Terr. Phys., 44, 759–767, https://doi.org/10.1016/0021-9169(82)90004-6, 1982. 
Abdu, M. A., Kherani, E. A., S.Batista, I., and Sobral, J. H. A.: Equatorial evening prereversal vertical drift and spread F suppression by disturbance penetrationelectric fields, Geophys. Res. Lett., 36, L19103, https://doi.org/10.1029/2009GL039919, 2009a. 
Abdu, M. A., Alam Kherani, E., Batista, I. S., de Paula, E. R., Fritts, D. C., and Sobral, J. H. A.: Gravity wave initiation of equatorial spread F/plasma bubble irregularities based on observational data from the SpreadFEx campaign, Ann. Geophys., 27, 2607–2622, https://doi.org/10.5194/angeo-27-2607-2009, 2009b. 
Andrioli, V. F., Batista, P. P., Clemesha, B. R., and Schuch, N. J.: Analysis of mean winds and atmospheric tides at middle and lower latitudes in South Hemisphere, in: IAGA 2009, Sopron, Hungary, 2009a. 
Andrioli, V. F., Clemesha, B. R., Batista, P. P., and Schuch, N. J.: Atmospheric tides and mean winds in the meteor region over Santa Maria (29.7 S; 53.8 W), J. Atmos. Sol.-Terr. Phys., 71, 1864–1876, 2009b. 
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For the first time, the climatology of intermediate descending layers (~150 km) over Brazilian equatorial and low-latitude regions during the extreme solar minimum period of 2009 was investigated. The results are interesting and innovative. For this analysis we used data of height and top frequency of intermediate layers collected from a digisonde located at São Luis and Cachoreira Paulista.
For the first time, the climatology of intermediate descending layers (~150 km) over Brazilian...
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