Characteristics of the intraseasonal oscillations in the lower and middle atmosphere over Gadanki
作者： A. Guharay , R. Sekar , M. Venkat Ratnam , P.P. Batista
DOI: 10.1016/J.JASTP.2011.12.016
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摘要: Abstract Systematic measurement of the tropical intraseasonal oscillation (ISO) has been carried out with radiosonde, TIMED Doppler Interferometer, European Center for Medium Range Weather Forecasting zonal wind data as well Outgoing Longwave Radiation (OLR) over Gadanki (13.5°N, 79.2°E). There is an emphatic signature ISO modulation by dominant annual in lower troposphere and upper stratosphere. Periodogram analysis revealed oscillations periodicity range 20–100 days. amplitudes are significantly higher Mesosphere Lower Thermosphere (MLT) comparison Troposphere Stratosphere. activity found to be intermittent consistent MLT. Signature insignificant Normally, there good correlation between convection during all seasons within scale variability. Also mean latitudinal longitudinal OLR show common pattern variability winter summer certain times, which affirmed ECMWF filtered results. These findings indicate presence some complex mechanisms alter direct impact on times.
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