Zobrazeno 1 - 10
of 111
pro vyhledávání: '"D. C. Fritts"'
Publikováno v:
Atmospheric Measurement Techniques, Vol 16, Pp 1087-1101 (2023)
In the course of the GW-LCYCLE II campaign, conducted in Jan/Feb 2016 from Kiruna, Sweden, coherent Doppler wind lidar (2 µm DWL) measurements were performed from the DLR Falcon aircraft to investigate gravity waves induced by flow across the Scandi
Externí odkaz:
https://doaj.org/article/689e80e4e6d146718fbebfd3ca598c92
Publikováno v:
Atmospheric Chemistry and Physics, Vol 23, Pp 949-961 (2023)
The Balloon Lidar Experiment (BOLIDE), which was part of the Polar Mesospheric Cloud Turbulence (PMC Turbo) Balloon Mission has captured vertical profiles of PMCs during a 6 d flight along the Arctic circle in July 2018. The high-resolution soundings
Externí odkaz:
https://doaj.org/article/5ce0df2e6d38430a8c41cb5e179a1445
Publikováno v:
Earth System Science Data, Vol 14, Pp 4923-4934 (2022)
The Balloon Lidar Experiment (BOLIDE) observed polar mesospheric clouds (PMCs) along the Arctic circle between Sweden and Canada during the balloon flight of PMC Turbo in July 2018. The purpose of the mission was to study small-scale dynamical proces
Externí odkaz:
https://doaj.org/article/8ad7e5b6f69b4baf803565ba1a09d8d4
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:
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
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
Publikováno v:
Annales Geophysicae, Vol 31, Pp 2123-2135 (2013)
We employ a modified composite day extension of the Hocking (2005) analysis method to study gravity wave (GW) activity in the mesosphere and lower thermosphere using 4 meteor radars spanning latitudes from 7° S to 53.6° S. Diurnal and semidiurna
Externí odkaz:
https://doaj.org/article/192f0f5f2f924ec0b01ea5ea97b85438
Improved analysis of all-sky meteor radar measurements of gravity wave variances and momentum fluxes
Publikováno v:
Annales Geophysicae, Vol 31, Pp 889-908 (2013)
The advantages of using a composite day analysis for all-sky interferometric meteor radars when measuring mean winds and tides are widely known. On the other hand, problems arise if this technique is applied to Hocking's (2005) gravity wave analys
Externí odkaz:
https://doaj.org/article/4f2ab27558de4a458d69a0107f4a5862
Publikováno v:
Annales Geophysicae, Vol 30, Pp 945-962 (2012)
In this paper, we develop an estimator for the vertical flux of horizontal momentum with arbitrary beam pointing, applicable to the case of arbitrary but fixed beam pointing with systems such as the Poker Flat Incoherent Scatter Radar (PFISR). Thi
Externí odkaz:
https://doaj.org/article/97ccc30186134fe193309c28797281d2
Publikováno v:
Annales Geophysicae, Vol 27, Pp 2607-2622 (2009)
The data from ground based experiments conducted during the 2005 SpreadFEx campaign in Brazil are used, with the help of theoretical model calculations, to investigate the precursor conditions, and especially, the role of gravity waves, in the ins
Externí odkaz:
https://doaj.org/article/4b7302fcae64418091d67d3ed72aff1b