Dinâmica e morfologia da tropopausa sobre a região de NatalRN utilizando dados de radiossondagens do Centro de Lançamento da Barreira do Inferno

Abstract

The terrestrial equatorial tropopause is generally analyzed as a region of modest temperature variations and defined only as an interface between the troposphere and the stratosphere. However, recent works have suggested that the tropopause may be a source of disturbances capable of locally affecting the tropospheric climate. In this context, the present work describes a detailed investigation of the characteristics of the equatorial tropopause over Natal-RN, from data of radiosondes of meteorological balloons launched by Barreira do Inferno Center of Launch (CLBI) during the years from 1986 to 2018, and the digital platform of the Department of Atmospheric Sciences at the University of Wyoming, between the following ranges: 1986 to 1995 and 2015 to 2018. In addition, comparisons with semi-empirical computational models such as the MSIS-90 show differences with the studied data. Were compared with the seasons, and it was found that the minimum temperature occurs in autumn and the maximum during winter. To verify the causes of this result, data on precipitation, latent heat flow, and sensitive heat flow were analyzed, indicating that the possible reason for the minimum temperature is related to the rainy season. Another important result was the performance of the Intertropical Convergence Zone in the transport of energy between the hemispheres through the Tropopause, which explains the reason for the increase in temperature during the winter. A study was also carried out on the relationship between the temperature of the tropopause and the solar cycles, showing that the temperature has been decreasing, similarly to solar activity. Finally, an adjustment in the temperature of the atmosphere above 15 km altitude is suggested for the MSIS-90.