Comparação dos topos dos ecos de radar no Estado de São Paulo com topos de nuvens observados por CALIOP a bordo do satélite CALIPSO

• Autor(a) principal: Ramires, Thiago [UNESP]
• Data de Publicação: 2016
• Tipo de documento: Trabalho de conclusão de curso
• Idioma: por
• Título da fonte: Repositório Institucional da UNESP
• Texto Completo: http://hdl.handle.net/11449/155793; http://www.athena.biblioteca.unesp.br/exlibris/bd/capelo/2017-08-21/000889599.pdf
• topic: Nuvens - Fotografias do espaço. São Paulo (Estado); Satelites artificiais em sensoriamento remoto; Radar meteorológico

Clouds have a very important function for all life on our planet, due to climatic processes, severe thunderstorms and their direct and indirect contributions to the Earth's radiative balance. The comparison of radar echo tops in the state of São Paulo, derived from the meteorological radars of the Meteorological Research Institute (IPMet; since 2014: Centro de Meteorologia de Bauru) with data generated by the CALIOP (Cloud-Aerosol Lidar with Orthogonal Polarization) system onboard of the CALIPSO (Cloud-Aerosol Lidar and Infrared Pathfinder Satellite Observation) satellite, permits a quantification of convective cells penetrating above the tropopause and injecting water in liquid form (supercooled), or as ice cristals into the lower stratosphere (overshooting). This process is of great importance for the global transport of water within the lower stratosphere, and also facilitating certain chemical reactions, which could lead to climate changes. This research project analyzed the relationship between the height of radar echo tops and cloud tops of the same rain cell observed by CALIOP. The data was collected during the periods from December 2010 to January 2011 and from December 2012 to February 2013. The radar data was processed with the IRIS (Interactive Radar Information System) software, generating 3,5 km CAPPIs, as well as images of echo tops up to 20 km. CALIOP data was processed with the software Mathematica and visualized with HDFview. The comparison yielded 16 days, when precipitation was observed along the trajectory of CALIPSO within the range of the two radars. In 90% of these days, CALIOP observed cloud tops higher than the echo tops identified by the radars. On average, this difference was 3,6 km. However, it was not possible to compile an exact statistic, due to the problem of localizing the very same point on the radar image and the CALIOP trajectory, as well as the difference in spatial resolution