Zobrazeno 1 - 10
of 52
pro vyhledávání: '"John G. Mengel"'
Publikováno v:
Annales Geophysicae, Vol 22, Pp 3421-3435 (2004)
Annales Geophysicae
Annales Geophysicae, European Geosciences Union, 2004, 22 (10), pp.3421-3435
Annales Geophysicae, Vol 22, Iss 10, Pp 3421-3435 (2004)
Scopus-Elsevier
Annales Geophysicae
Annales Geophysicae, European Geosciences Union, 2004, 22 (10), pp.3421-3435
Annales Geophysicae, Vol 22, Iss 10, Pp 3421-3435 (2004)
Scopus-Elsevier
At high latitudes in the upper mesosphere, horizontal wind oscillations have been observed with periods around 10h. Waves with such a period are generated in our Numerical Spectral Model (NSM), and they are identified as planetary-scale inertio gravi
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::c8bc307971f2d149be1f5edb57add781
https://www.ann-geophys.net/22/3421/2004/
https://www.ann-geophys.net/22/3421/2004/
Publikováno v:
Journal of Atmospheric and Solar-Terrestrial Physics. 73:711-730
As Lindzen (1981) had shown, small-scale gravity waves (GW) produce the observed reversals of the zonal-mean circulation and temperature variations in the upper mesosphere. The waves also play a major role in modulating and amplifying the diurnal tid
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::ac590456032d48fba2d1335f6f7f4d7b
https://doi.org/10.1016/j.jastp.2011.01.019
https://doi.org/10.1016/j.jastp.2011.01.019
Publikováno v:
Journal of Atmospheric and Solar-Terrestrial Physics. 72:807-828
It is generally accepted that small-scale gravity waves (GW) produce the observed reversals in the zonal circulation and temperature variations of the upper mesosphere (e.g., Lindzen, 1981). There is evidence that GW also play an important role in th
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::6c65c578faf2c79032a1f075caf0332c
https://doi.org/10.1016/j.jastp.2010.03.018
https://doi.org/10.1016/j.jastp.2010.03.018
Publikováno v:
Journal of Atmospheric and Solar-Terrestrial Physics. 71:1299-1308
Intra-seasonal oscillations (ISO) are observed in the zonal-mean of mesospheric wind and temperature measurements-and the numerical spectral model (NSM) generates such oscillations. Relatively large temperature ISO are evident also in stratospheric C
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::835b656a1546a32daca38c2a5276f384
https://doi.org/10.1016/j.jastp.2009.05.003
https://doi.org/10.1016/j.jastp.2009.05.003
Publikováno v:
Journal of Atmospheric and Solar-Terrestrial Physics. 71:508-517
Measurements show that the polar mesospheric clouds (PMC) can vary, in the zonal mean, with periods around 1 month [Bailey et al., 2005. Observations of polar mesospheric clouds by the Student Nitric Oxide Explorer. J. Geophys. Res. 110, D13203, doi:
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::86c3e3b3f405a3775b4f634802e3adeb
https://doi.org/10.1016/j.jastp.2008.09.037
https://doi.org/10.1016/j.jastp.2008.09.037
Publikováno v:
Annales Geophysicae, Vol 25, Pp 1071-1092 (2007)
Annales Geophysicae
Annales Geophysicae, European Geosciences Union, 2007, 25 (5), pp.1071-1092
Annales Geophysicae, Vol 25, Iss 5, Pp 1071-1092 (2007)
Annales Geophysicae
Annales Geophysicae, European Geosciences Union, 2007, 25 (5), pp.1071-1092
Annales Geophysicae, Vol 25, Iss 5, Pp 1071-1092 (2007)
In several papers, the solar cycle (SC) effect in the lower atmosphere has been linked observationally to the Quasi-biennial Oscillation (QBO) of the zonal circulation. Salby and Callaghan (2000) in particular analyzed the QBO wind measurements, cove
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::679ba1cde98bb8079ab8f20e1b67208a
https://www.ann-geophys.net/25/1071/2007/angeo-25-1071-2007.pdf
https://www.ann-geophys.net/25/1071/2007/angeo-25-1071-2007.pdf
Publikováno v:
Journal of Atmospheric and Solar-Terrestrial Physics. 67:959-980
In light of the measurements from the TIMED spacecraft and coordinated ground-based observations, we discuss results from a modeling study with our Numerical Spectral Model (NSM), which specifically deals with the non-migrating tides generated in the
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::3618cb50ab16ffd8eb1a73e796cb7d20
https://doi.org/10.1016/j.jastp.2005.03.002
https://doi.org/10.1016/j.jastp.2005.03.002
Publikováno v:
Journal of Atmospheric and Solar-Terrestrial Physics. 67:981-991
We demonstrated that, in our model, non-linear interactions between planetary waves (PW) and migrating tides could generate in the upper mesosphere non-migrating tides with amplitudes comparable to those observed. The Numerical Spectral Model (NSM) w
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::f5105a67db97d9a335ffa6b7cb2f4209
https://doi.org/10.1016/j.jastp.2005.03.003
https://doi.org/10.1016/j.jastp.2005.03.003
Publikováno v:
Journal of Atmospheric and Solar-Terrestrial Physics. 65:887-899
Quasi-decadal oscillations (QDO) have been observed in the stratosphere and have been linked to the quasi-biennial oscillation (QBO) in the zonal circulation and to the 11-year solar activity cycle. With the use of a 2D version of our numerical spect
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::f43be8370cc8cb9a73596927fb5314b2
https://doi.org/10.1016/s1364-6826(03)00110-x
https://doi.org/10.1016/s1364-6826(03)00110-x
Publikováno v:
Journal of Atmospheric and Solar-Terrestrial Physics. 65:901-916
Solar cycle activity e.ects (SCAE) in the lower and middle atmosphere, reported in several studies, are di;cult to explain on the basis of the small changes in solar radiation that accompany the 11-year cycle. It is therefore natural to speculate tha
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::3ab3b86577ca654c07d0cd4e44a8ce4b
https://doi.org/10.1016/s1364-6826(03)00111-1
https://doi.org/10.1016/s1364-6826(03)00111-1