Zobrazeno 1 - 10
of 988
pro vyhledávání: '"S. D. Zhang"'
Publikováno v:
Annales Geophysicae, Vol 35, Pp 107-116 (2017)
By applying 12-year (1998–2009) radiosonde data over a midlatitude station, we studied the vertical wavenumber spectra of three-dimensional wind fluctuations. The horizontal wind spectra in the lower stratosphere coincide well with the well-know
Externí odkaz:
https://doaj.org/article/b1f9868386024fe5ab0c26398bc9e038
Publikováno v:
Annales Geophysicae, Vol 34, Pp 331-345 (2016)
Spatial and temporal variabilities of Kelvin waves during stratospheric sudden warming (SSW) events are investigated by the ERA-Interim reanalysis data, and the results are validated by the COSMIC temperature data. A case study on an exceptionally
Externí odkaz:
https://doaj.org/article/0a688f6f883d4ce9b57bfd7ebfd78812
Autor:
K. M. Huang, A. Z. Liu, S. D. Zhang, F. Yi, C. M. Huang, Q. Gan, Y. Gong, Y. H. Zhang, R. Wang
Publikováno v:
Annales Geophysicae, Vol 33, Pp 1321-1330 (2015)
By using meteor radar, radiosonde and satellite observations over 20° N and NCEP/NCAR reanalysis data during 81 days from 22 December 2004 to 12 March 2005, a quasi-27-day oscillation propagating from the troposphere to the mesosphere is reported
Externí odkaz:
https://doaj.org/article/178ddc84d6224cd38e033adee0699c39
Publikováno v:
Annales Geophysicae, Vol 33, Pp 913-922 (2015)
In the current work, temperature and wind data from the Thermosphere Ionosphere Mesosphere Energetics and Dynamics (TIMED) satellite during the years 2002–2007 were used to describe the seasonal variations of the westward propagating 6.5-day pla
Externí odkaz:
https://doaj.org/article/6413f80904bd48a0bd64023bc26aa4c5
Publikováno v:
Annales Geophysicae, Vol 32, Pp 1129-1143 (2014)
We extended the broad spectral method proposed by Zhang et al. (2013) for the extraction of medium- and high-frequency gravity waves (MHGWs). This method was applied to 11 years (1998–2008) of radiosonde data from 92 stations in the Northern Hem
Externí odkaz:
https://doaj.org/article/b9830f403431470cad98c2616948547c
Publikováno v:
Annales Geophysicae, Vol 32, Pp 263-275 (2014)
Starting from a set of fully nonlinear equations, this paper studies that two initial gravity wave packets interact to produce a third substantial packet in a nonisothermal and dissipative atmosphere. The effects of the inhomogeneous temperature a
Externí odkaz:
https://doaj.org/article/c5d3efc217bc45fda357786db0edc3f0
Publikováno v:
Annales Geophysicae, Vol 31, Pp 2039-2048 (2013)
Relative to extensive studies of interactions between the quasi 2-day wave and tides, nonlinear interaction of the 16-day wave with tides was reported less, in particular interaction with the diurnal tide. We present an observational study of a po
Externí odkaz:
https://doaj.org/article/e3b8016e495f434e9cc69755fe5dcd8f
Publikováno v:
Annales Geophysicae, Vol 31, Pp 1731-1743 (2013)
Using a nonlinear, 2-D time-dependent numerical model, we simulate the propagation of gravity waves (GWs) in a time-varying tide. Our simulations show that when a GW packet propagates in a time-varying tidal-wind environment, not only its intrinsi
Externí odkaz:
https://doaj.org/article/2ee976c342144ce89ce3544d9233ec52
Publikováno v:
Annales Geophysicae, Vol 31, Pp 1061-1075 (2013)
This paper presents characteristics of quasi-two-day waves (QTDWs) in the mesosphere and lower thermosphere (MLT) between 52° S and 52° N from 2002 to 2011 using TIMED/SABER temperature data. Spectral analysis suggests that dominant QTDW compone
Externí odkaz:
https://doaj.org/article/99d9336719e346f68ce085675a5e07f1
Characteristics of mid-latitude planetary waves in the lower atmosphere derived from radiosonde data
Publikováno v:
Annales Geophysicae, Vol 30, Pp 1463-1477 (2012)
The activities of mid-latitude planetary waves (PWs) in the troposphere and lower stratosphere (TLS) are presented by using the radiosonde data from 2000 to 2004 over four American stations (Miramar Nas, 32.9° N, 117.2° W; Santa Teresa, 31.9° N
Externí odkaz:
https://doaj.org/article/0df71478c518462389a596c6ff03b864