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Mostrando ítems 11-20 de 179
Wind-profiling doppler radars for tropical atmospheric research
(American Geophysical Union, 1990-12)
The past decade has seen a rapid increase in the use of wind profilers in atmospheric research [Gage, 1990]. Briefly, wind profilers are Doppler radars that observe winds from Doppler shifts of "clear air" atmospheric ...
Jicamarca radar observations of the diurnal and semidiurnal tide in the troposphere and lower stratosphere
(American Geophysical Union, 2002-04)
The mesosphere-stratosphere-troposphere (MST) radar at Jicamarca, Peru (12S, 77W), made extended (15 day or longer) observations of the horizontal and vertical winds that were used to infer the diurnal and semidiurnal ...
Radar/ MST and ST radars and wind profilers
(Academic Press, 2002-12)
To qualify as an MST radar, the system has to be capable of obtaining echoes from the mesosphere. This requirement limits the frequency range of these radars to the lower frequencies of the VHF band, i.e., between 30 and ...
Spectral parameter estimation of CAT radar echoes in the presence of fading clutter
(American Geophysical Union, 1982-07)
The 430 MHz, 2 MW radar at the Arecibo Observatory is currently being used as a stratospheric-troposheric (ST) radar. One of the problems in the automatic analysis of the signals come from the very large amplitude of the ...
Initial MST radar observations of upper tropospheric-lower stratospheric duct-like structures over Jicamarca, Peru
(European Geosciences Union, 2012-11-22)
Persistent wind jet structures along zonal and meridional fields, believed to be caused by stationary gravity waves, were detected in February 1999 in mesospherestratosphere-troposphere (MST) radar wind measurements of the ...
Quasi-periodic imprints in the equatorial troposphere and stratosphere in three decades of reanalysis data
(Springer Wien, 2013-05)
Wavelet analysis is applied to zonal mean zonal wind and temperature fields to represent characteristics of temporal periodic features different from the annual and semi-annual recurrence in the troposphere and stratosphere. ...
Radar-measurements in the Tropo, Strato and Mesosphere
(Max-Plank Institute für Aeronomie, 1976-07)
An experiment was performed using the large 50 MHz-radar at Jicamarca/ Peru to obs erve waves, winds and clear air turbulence (CAT) at tropospheric and stratospheric heights. The antenna was used asan interferometer in ...
Case Study of Upper Tropospheric Meteorological Systems on South America: Synoptic AnalysisEstudo de Caso de Sistemas Meteorológicos em Altos Níveis Sobre a América do Sul: Análise Sinótica
(Centro de Ciências Matemáticas e da Natureza, Instituto de Geociências, Universidade Feder, 2017)
Stratosphere/troposphere joint variability in southern South America as estimated from a principal components analysis
(Springer Wien, 2017-06)
To understand how the tropopause annual evolution relates to the troposphere and lower stratosphere over southern South America, the study analyzes the joint behavior of single and double thermal tropopauses with the 500 ...