Zobrazeno 1 - 10
of 189
pro vyhledávání: '"D. Janches"'
Autor:
G. Stober, S. L. Vadas, E. Becker, A. Liu, A. Kozlovsky, D. Janches, Z. Qiao, W. Krochin, G. Shi, W. Yi, J. Zeng, P. Brown, D. Vida, N. Hindley, C. Jacobi, D. Murphy, R. Buriti, V. Andrioli, P. Batista, J. Marino, S. Palo, D. Thorsen, M. Tsutsumi, N. Gulbrandsen, S. Nozawa, M. Lester, K. Baumgarten, J. Kero, E. Belova, N. Mitchell, T. Moffat-Griffin, N. Li
Publikováno v:
Atmospheric Chemistry and Physics, Vol 24, Pp 4851-4873 (2024)
The Hunga Tonga–Hunga Ha′apai volcano erupted on 15 January 2022, launching Lamb waves and gravity waves into the atmosphere. In this study, we present results using 13 globally distributed meteor radars and identify the volcanogenic gravity wave
Externí odkaz:
https://doaj.org/article/0133d4fea3734285b24eb6038c6c999c
Autor:
G. Stober, A. Liu, A. Kozlovsky, Z. Qiao, A. Kuchar, C. Jacobi, C. Meek, D. Janches, G. Liu, M. Tsutsumi, N. Gulbrandsen, S. Nozawa, M. Lester, E. Belova, J. Kero, N. Mitchell
Publikováno v:
Atmospheric Measurement Techniques, Vol 15, Pp 5769-5792 (2022)
Meteor radars have become widely used instruments to study atmospheric dynamics, particularly in the 70 to 110 km altitude region. These systems have been proven to provide reliable and continuous measurements of horizontal winds in the mesosphere an
Externí odkaz:
https://doaj.org/article/441a7e5c7e894dafbabf273e26fe8f9b
Autor:
N. P. Hindley, N. J. Mitchell, N. Cobbett, A. K. Smith, D. C. Fritts, D. Janches, C. J. Wright, T. Moffat-Griffin
Publikováno v:
Atmospheric Chemistry and Physics, Vol 22, Pp 9435-9459 (2022)
The mesosphere and lower thermosphere (MLT) is a dynamic layer of the earth's atmosphere. This region marks the interface at which neutral atmosphere dynamics begin to influence the upper atmosphere and ionosphere. However, our understanding of this
Externí odkaz:
https://doaj.org/article/69abe8f33e6f4c658107250272050712
Autor:
E. C. M. Dawkins, G. Stober, D. Janches, J. D. Carrillo‐Sánchez, R. S. Lieberman, C. Jacobi, T. Moffat‐Griffin, N. J. Mitchell, N. Cobbett, P. P. Batista, V. F. Andrioli, R. A. Buriti, D. J. Murphy, J. Kero, N. Gulbrandsen, M. Tsutsumi, A. Kozlovsky, J. H. Kim, C. Lee, M. Lester
Publikováno v:
Geophysical Research Letters, Vol 50, Iss 2, Pp n/a-n/a (2023)
Abstract The mesosphere/lower thermosphere (MLT, 80–100 km) region is an important boundary between Earth's atmosphere below and space above and may act as a sensitive indicator for anthropogenic climate change. Existing observational and modeling
Externí odkaz:
https://doaj.org/article/6e7f6393e4c044ea9a18249489660897
Autor:
G. Stober, A. Kuchar, D. Pokhotelov, H. Liu, H.-L. Liu, H. Schmidt, C. Jacobi, K. Baumgarten, P. Brown, D. Janches, D. Murphy, A. Kozlovsky, M. Lester, E. Belova, J. Kero, N. Mitchell
Publikováno v:
Atmospheric Chemistry and Physics, Vol 21, Pp 13855-13902 (2021)
Long-term and continuous observations of mesospheric–lower thermospheric winds are rare, but they are important to investigate climatological changes at these altitudes on timescales of several years, covering a solar cycle and longer. Such long ti
Externí odkaz:
https://doaj.org/article/3df11b15026b4bef8470b2e402351c13
Autor:
G. Stober, D. Janches, V. Matthias, D. Fritts, J. Marino, T. Moffat-Griffin, K. Baumgarten, W. Lee, D. Murphy, Y. H. Kim, N. Mitchell, S. Palo
Publikováno v:
Annales Geophysicae, Vol 39, Pp 1-29 (2021)
In this study we explore the seasonal variability of the mean winds and diurnal and semidiurnal tidal amplitude and phases, as well as the Reynolds stress components during 2019, utilizing meteor radars at six Southern Hemisphere locations ranging fr
Externí odkaz:
https://doaj.org/article/f86f38a16b8a47e1a8b87f616dac5b35
Autor:
G. A. Giongo, J. V. Bageston, P. P. Batista, C. M. Wrasse, G. D. Bittencourt, I. Paulino, N. M. Paes Leme, D. C. Fritts, D. Janches, W. Hocking, N. J. Schuch
Publikováno v:
Annales Geophysicae, Vol 36, Pp 253-264 (2018)
The main goals of this work are to characterize and investigate the potential wave sources of four mesospheric fronts identified in the hydroxyl near-infrared (OH-NIR) airglow images, obtained with an all-sky airglow imager installed at Comandante
Externí odkaz:
https://doaj.org/article/459baf5626a045a38241a1954ddc6beb
Autor:
P. A. Panka, A. A. Kutepov, K. S. Kalogerakis, D. Janches, J. M. Russell, L. Rezac, A. G. Feofilov, M. G. Mlynczak, E. Yiğit
Publikováno v:
Atmospheric Chemistry and Physics, Vol 17, Pp 9751-9760 (2017)
In the 1970s, the mechanism of vibrational energy transfer from chemically produced OH(ν) in the nighttime mesosphere to the CO2(ν3) vibration, OH(ν) ⇒ N2(ν) ⇒ CO2(ν3), was proposed. In later studies it was shown that this "direct" mechan
Externí odkaz:
https://doaj.org/article/4f1d2f4d82bb455fb3ac3734729f163a
Publikováno v:
Annales Geophysicae, Vol 33, Pp 1349-1359 (2015)
A study of the quasi-5-day wave (5DW) was performed using meteor radars at conjugate latitudes in the Northern and Southern hemispheres. These radars are located at Esrange, Sweden (68° N) and Juliusruh, Germany (55° N) in the Northern Hemispher
Externí odkaz:
https://doaj.org/article/f55bad161e73423ca405319598a8a262
Autor:
M. P. Langowski, C. von Savigny, J. P. Burrows, W. Feng, J. M. C. Plane, D. R. Marsh, D. Janches, M. Sinnhuber, A. C. Aikin, P. Liebing
Publikováno v:
Atmospheric Chemistry and Physics, Vol 15, Iss 1, Pp 273-295 (2015)
Mg and Mg+ concentration fields in the upper mesosphere/lower thermosphere (UMLT) region are retrieved from SCIAMACHY/Envisat limb measurements of Mg and Mg+ dayglow emissions using a 2-D tomographic retrieval approach. The time series of monthly
Externí odkaz:
https://doaj.org/article/ce9ce88f37844a6dbee1a15bcffb65be