摘要： The structure and variability of tropical tropopause over Gadanki (13.5°N, 79.2°E) are delineated using data obtained from Indian MST radar operated in the vertical mode as a part of intense Tropical Tropopause Dynamics (TTD) campaigns conducted under the CAWSES India Phase II (Theme 3) program. Radar measurements for 72h in each month from December 2010 to September 2013 have been considered. The identified tropopause altitude with radar (RTH) is compared with the cold point (CPH) and lapse rate tropopause altitudes (LRH) obtained from simultaneous radiosonde data at three hourly intervals during these campaigns. Most of the time, a very good agreement between the RTH and CPH and/or LRH from radiosonde measurements is observed. The mean difference between RTH and CPH and RTH and LRH is found to be 0.1±1km and 0.5±1km, respectively. The smaller differences between RTH and CPH noticed in the present work when compared to other mid- and polar latitudes might be due to the well defined tropopause structure in the tropical latitudes. As the radar provides reliable data on the tropopause, its long-term variability is investigated using the data from 2007 to 2012 available from the MST radar. •Tropopause altitude detected by MST radar agrees well with radiosonde.•Long-term in the tropopause altitude detected by radar is noticed.•This study expected to provide stronger insights on STE processes. 出版者： Elsevier Ltd 出版日期： 2014-12 出處： Journal of atmospheric and solar-terrestrial physics, 2014-12, Vol.121, p.240-247 資源來源： ScienceDirect - Freedom Collection 版權： 2014 Elsevier Ltd 識別號： ISSN: 1364-6826 識別號： EISSN: 1879-1824 識別號： DOI: 10.1016/j.jastp.2014.09.008
