Zobrazeno 1 - 10
of 29
pro vyhledávání: '"J.-P. Makela"'
Autor:
P. A. Inchin, A. Bhatt, S. A. Cummer, S. D. Eckermann, B. J. Harding, D. D. Kuhl, J. Ma, J. J. Makela, R. Sabatini, J. B. Snively
Publikováno v:
AGU Advances, Vol 4, Iss 6, Pp n/a-n/a (2023)
Abstract The Hunga‐Tonga Hunga‐Ha'apai volcano underwent a series of large‐magnitude eruptions that generated broad spectra of mechanical waves in the atmosphere. We investigate the spatial and temporal evolutions of fluctuations driven by atmo
Externí odkaz:
https://doaj.org/article/d6540e0d815a413ab0b1e45c6034f537
Autor:
D. D. Billett, K. A. McWilliams, R. B. Kerr, J. J. Makela, A. T. Chartier, J. M. Ruohoniemi, S. Kapali, M. A. Migliozzi, J. Riccobono
Publikováno v:
Annales Geophysicae, Vol 40, Pp 571-583 (2022)
We investigate the response of the mid-latitude thermospheric neutral winds to a sub-auroral polarization stream (SAPS) event. Using red line (F region) airglow data from two Fabry–Pérot interferometers (FPIs), and F-region ionospheric flow veloci
Externí odkaz:
https://doaj.org/article/a5930d0ec91e43488663f207636172a7
Autor:
K. Malki, A. Bounhir, Z. Benkhaldoun, J. J. Makela, N. Vilmer, D. J. Fisher, M. Kaab, K. Elbouyahyaoui, B. J. Harding, A. Laghriyeb, A. Daassou, M. Lazrek
Publikováno v:
Annales Geophysicae, Vol 36, Pp 987-998 (2018)
The present work explores the ionospheric and thermospheric responses to the 27–28 February 2014 geomagnetic storm. For the first time, a geomagnetic storm is explored in north Africa using interferometer, all-sky imager and GPS data. This storm
Externí odkaz:
https://doaj.org/article/ca1d76930d944527b26ce606b3ef01c3
Autor:
R. L. A. Mesquita, J. W. Meriwether, J. J. Makela, D. J. Fisher, B. J. Harding, S. C. Sanders, F. Tesema, A. J. Ridley
Publikováno v:
Annales Geophysicae, Vol 36, Pp 541-553 (2018)
Fabry–Perot interferometer (FPI) measurements of thermospheric temperatures and winds show the detection and successful determination of the latitudinal distribution of the midnight temperature maximum (MTM) in the continental mid-eastern United
Externí odkaz:
https://doaj.org/article/542eb189d8b44e2aa6d5bb537bc5ebf7
Autor:
I. Paulino, J. F. Moraes, G. L. Maranhão, C. M. Wrasse, R. A. Buriti, A. F. Medeiros, A. R. Paulino, H. Takahashi, J. J. Makela, J. W. Meriwether, J. A. V. Campos
Publikováno v:
Annales Geophysicae, Vol 36, Pp 265-273 (2018)
Periodic waves were observed in the OI6300 airglow images over São João do Cariri (36.5° W, 7.4° S) from 2012 to 2014 with simultaneous observations of the thermospheric wind using two Fabry–Pérot interferometers (FPIs). The FPIs measuremen
Externí odkaz:
https://doaj.org/article/368181bc33ec485f8613eb483e140297
Autor:
C. A. O. B. Figueiredo, R. A. Buriti, I. Paulino, J. W. Meriwether, J. J. Makela, I. S. Batista, D. Barros, A. F. Medeiros
Publikováno v:
Annales Geophysicae, Vol 35, Pp 953-963 (2017)
The midnight temperature maximum (MTM) has been observed in the lower thermosphere by two Fabry–Pérot interferometers (FPIs) at São João do Cariri (7.4° S, 36.5° W) and Cajazeiras (6.9° S, 38.6° W) during 2011, when the solar activity wa
Externí odkaz:
https://doaj.org/article/90314db10c11406ebe643e998eefcfc1
Autor:
M. Kaab, Z. Benkhaldoun, D. J. Fisher, B. Harding, A. Bounhir, J. J. Makela, A. Laghriyeb, K. Malki, A. Daassou, M. Lazrek
Publikováno v:
Annales Geophysicae, Vol 35, Pp 161-170 (2017)
In order to explore coupling between the thermosphere and ionosphere and to address the lack of data relating to thermospheric neutral winds and temperatures over the African sector, a new system of instruments was installed at the Oukaïmeden Obs
Externí odkaz:
https://doaj.org/article/edfa975233504fa88d1d0064caa9a1bc
Publikováno v:
Annales Geophysicae, Vol 32, Pp 959-965 (2014)
Plasma blobs, localized plasma density enhancements that occur singularly or in periodic groups, have been observed by in situ sensors in the lower- and middle-latitude nighttime ionosphere. Traditionally, creation of blobs has been thought to be
Externí odkaz:
https://doaj.org/article/935f7a615438435ea856f018059628e5
Publikováno v:
Annales Geophysicae, Vol 31, Pp 2229-2237 (2013)
We present occurrence rate statistics for nighttime medium-scale traveling ionospheric disturbances (MSTIDs) in the Central Pacific and South American sectors using data collected by 630.0 nm filtered CCD imaging systems. The data were collected f
Externí odkaz:
https://doaj.org/article/db7aca9b2393468398d43860b0ed1952
Publikováno v:
Annales Geophysicae, Vol 28, Pp 977-981 (2010)
We discuss different phenomena occurring during ionospheric F-region storms that in principle might be caused by electric fields and point out challenges that must be faced when considering the physical processes at work. We consider the transport
Externí odkaz:
https://doaj.org/article/95aaf1333cbf4172bc874c5ad5386adc