Trabalho de Conclusão de Curso - Graduação

Características dos sistemas precipitantes produtores de relâmpagos e suas possíveis relações com as queimadas no Centro-Sul da Amazônia

The characteristics of precipitation and lightning occurrences of each type of system are investigated by precipitating the satellite Tropical Rainfall Measuring Mission (TRMM) data through sensors Lightning Imaging Sensor (LIS), Precipitation Radar (PR) and TRMM Microwave Imager (TMI), from Decembe...

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Autor principal: SILVA, Juliana Maria Pinheiro
Grau: Trabalho de Conclusão de Curso - Graduação
Publicado em: 2019
Assuntos:
Acesso em linha: http://bdm.ufpa.br/jspui/handle/prefix/1988
Resumo:
The characteristics of precipitation and lightning occurrences of each type of system are investigated by precipitating the satellite Tropical Rainfall Measuring Mission (TRMM) data through sensors Lightning Imaging Sensor (LIS), Precipitation Radar (PR) and TRMM Microwave Imager (TMI), from December 1997 to December 2012 on the southern Amazon. This study analyzed 15 years of spatial and temporal distribution of lightning and characteristics of precipitating systems. Data from outbreaks of fires detected by the National Institute for Space Research (INPE) for the period 1998-2007 were analyzed. An area bounded by 66 ° W to 60 ° W longitude and 14 ° S to 8 ° S latitude was selected, which was later divided into four sub-areas for optimum detail of information. The precipitation systems were classified following the methodology of Nesbitt et. al. 2000 and under a new definition of data conducted by Liu (2007). Precipitating systems sampled by TRMM satellite used in this work are called ALLPFS are classified in PFS and OTHPFS, which respectively are those who have and do not have information of brightness temperature. The PFS are sub-classified into systems without signature ice (WOICE), with signature ice (WICE) and mesoscale convective systems (MCS). The results show that near the cities of Porto Velho (Rondônia far west), south of the city of Humaitá (Amazonas) and part of Bolivia regions were those with the highest occurrences of lightning, with a value of approximately 5-6 lightning/year*km². The WOICEs were the most common systems in all regions and precipitation systems category WICE and MCS are those that contribute most to the production of lightning over these regions. Electrified systems have great contribution in the amount of precipitation on the southern areas of the region. In the analysis of the interaction between lightning and burned noted that fires in this region occurred most frequently between August to October period when the precipitation systems are not as active in clearing electrified precipitation systems and the largest amount of lightning have higher value in the second half of the year thus, this factor can interfere with the production of lightning through the amount of aerosols in the atmosphere from this activity.