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Variability in tropopause height and its temperature on different time scales: An observational study over Banqiao, Taiwan

Das, SK and Shankar Das, S and Chiang, CW and Kishore Kumar, K and Nee, JB (2012) Variability in tropopause height and its temperature on different time scales: An observational study over Banqiao, Taiwan. Journal of Atmospheric and Solar-Terrestrial Physics, 81-82. pp. 1-8.

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Abstract

Long term variability of cold point tropopause (CPT) height (CPTh) and cold point tropopause temperature (CPTt) using 21 years (1985-2005) of radiosonde observations over Banqiao (25°N, 121.3°E), Taiwan is reported. The time-frequency analysis of CPTh using the Morlet wavelet revealed a pronounced annual cycle (AC) over the entire observational period, whereas the CPTt showed a quasi-biennial oscillation (QBO) signal during some specific time period (1988-1998). It is observed that the CPTh and CPTt vary at different time scales. To examine the origin of observed CPT oscillations, the outgoing longwave radiation (OLR) observations from the National Centers for Environmental Prediction and the National Center for Atmospheric Research (NCEP/NCAR) have been used for the same time period (1985-2005) over the study site. The ozone observations from ozonesonde, which is launched from the Banqiao during the period from 1992 to 2005, are also used. The wavelet spectra of the CPTh, CPTt, OLR and stratospheric ozone obtained in the present analysis reveal that the CPTh and OLR have similar kind of variability, whereas the CPTt and the stratospheric ozone shows correlative interannual variations.

Item Type: Article
Additional Information: Copyright of this article belongs to Elsevier.
Uncontrolled Keywords: Annual cycle; Cold point; Different time scale; Interannual variability; Interannual variation; Long-term variability; Morlet Wavelet; National center for atmospheric researches; National centers for environmental predictions; NCEP/NCAR; Observational study; Outgoing longwave radiation; Ozone sondes; Quasi-biennial oscillation; Specific time; Stratospheric ozone; Study sites; Time frequency analysis; Time-periods; Tropopause, Climatology; Meteorological instruments; Oscillators (mechanical); Ozone; Ozone layer; Wavelet analysis, Clouds
Subjects: Meteorology and Climatology
Depositing User: IITM Library
Date Deposited: 27 Dec 2013 07:32
Last Modified: 27 Dec 2013 07:32
URI: http://moeseprints.incois.gov.in/id/eprint/490

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