Zobrazeno 1 - 10
of 2 100
pro vyhledávání: '"S Nozawa"'
Autor:
T. L. Gunnarsdottir, I. Mann, W. Feng, D. R. Huyghebaert, I. Haeggstroem, Y. Ogawa, N. Saito, S. Nozawa, T. D. Kawahara
Publikováno v:
Annales Geophysicae, Vol 42, Pp 213-228 (2024)
Meteoric ablation in the Earth's atmosphere produces particles of nanometer size and larger. These particles can become charged and influence the charge balance in the D region (60–90 km) and the incoherent scatter observed with radar from there. R
Externí odkaz:
https://doaj.org/article/38e8687c205f47409f05c0cc18f93e43
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:
J. Vierinen, F. L. Poblet, J. L. Chau, V. Avsarkisov, H. L. Pécseli, M. Tsutsumi, S. Nozawa, M. G. Johnsen, R. Latteck, N. Gulbrandsen
Publikováno v:
Geophysical Research Letters, Vol 51, Iss 11, Pp n/a-n/a (2024)
Abstract Stratified turbulence (ST) has been proposed as a model for the dynamics of the mesosphere‐lower thermosphere (MLT) region. This theory postulates that for horizontal mesoscales (∼1–400 km), the kinetic energy of horizontal winds dissi
Externí odkaz:
https://doaj.org/article/e8fd95c1ce544e308f9f4763b10c6a2a
Autor:
F. Günzkofer, D. Pokhotelov, G. Stober, I. Mann, S. L. Vadas, E. Becker, A. Tjulin, A. Kozlovsky, M. Tsutsumi, N. Gulbrandsen, S. Nozawa, M. Lester, E. Belova, J. Kero, N. J. Mitchell, C. Borries
Publikováno v:
Annales Geophysicae, Vol 41, Pp 409-428 (2023)
Atmospheric gravity waves and traveling ionospheric disturbances can be observed in the neutral atmosphere and the ionosphere at a wide range of spatial and temporal scales. Especially at medium scales, these oscillations are often not resolved in ge
Externí odkaz:
https://doaj.org/article/5c240cdb84054ff4b505d9fd335918ba
Publikováno v:
History of Geo- and Space Sciences, Vol 14, Pp 61-69 (2023)
In Sect. 1, the original planning of Japanese Svalbard IS (incoherent scatter) radar with phased-array antennas is described. In 1988, this plan was proposed as one of the major projects for the forthcoming Solar–Terrestrial Environment Laboratory,
Externí odkaz:
https://doaj.org/article/4cb12ac3469d4e5e9392ffa0f0510bff
Autor:
G. Stober, A. Liu, A. Kozlovsky, Z. Qiao, W. Krochin, G. Shi, J. Kero, M. Tsutsumi, N. Gulbrandsen, S. Nozawa, M. Lester, K. Baumgarten, E. Belova, N. Mitchell
Publikováno v:
Annales Geophysicae, Vol 41, Pp 197-208 (2023)
The Hunga Tonga–Hunga Ha′apai volcano eruption was a unique event that caused many atmospheric phenomena around the globe. In this study, we investigate the atmospheric gravity waves in the mesosphere/lower-thermosphere (MLT) launched by the volc
Externí odkaz:
https://doaj.org/article/4766351e65924f06bf1931e733531029
Autor:
Y. Xia, J. Jiao, S. Nozawa, X. Cheng, J. Wang, C. Shi, L. Du, Y. Li, H. Zheng, F. Li, G. Yang
Publikováno v:
Atmospheric Chemistry and Physics, Vol 22, Pp 13817-13831 (2022)
Based on the full-diurnal-cycle sodium (Na) lidar observations at Beijing (40.41∘ N, 116.01∘ E), we report pronounced downward extensions of the Na layer bottomside to below 75 km near mid-December 2014. Considerable Na atoms were observed even a
Externí odkaz:
https://doaj.org/article/4203b3e938f5454e87ed14b5bc834bd0
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:
G. Stober, A. Kozlovsky, A. Liu, Z. Qiao, M. Tsutsumi, C. Hall, S. Nozawa, M. Lester, E. Belova, J. Kero, P. J. Espy, R. E. Hibbins, N. Mitchell
Publikováno v:
Atmospheric Measurement Techniques, Vol 14, Pp 6509-6532 (2021)
Ground-based remote sensing of atmospheric parameters is often limited to single station observations by vertical profiles at a certain geographic location. This is a limiting factor for investigating gravity wave dynamics as the spatial information
Externí odkaz:
https://doaj.org/article/49bbaed7924a43a9995188db55f5f69d
Autor:
V. L. Narayanan, S. Nozawa, S.-I. Oyama, I. Mann, K. Shiokawa, Y. Otsuka, N. Saito, S. Wada, T. D. Kawahara, T. Takahashi
Publikováno v:
Atmospheric Chemistry and Physics, Vol 21, Pp 2343-2361 (2021)
We present a detailed investigation of the formation of an additional sodium density peak at altitudes of 79–85 km below the main peak of the sodium layer based on sodium lidar and airglow imager measurements made at Ramfjordmoen near Tromsø, Norw
Externí odkaz:
https://doaj.org/article/6f58be73fff54684ad7c1f1d4897fe5a