CG lightning activity over Brazil based on VLF, LF and LIS data
The first integration of the Brazilian lightning detection network in September 1998 (called previously RINDAT) allowed covering the entire southeastern region of Brazil with 25 low-frequency (LF) sensors. After several integrations and upgrades (due to other jointed projects like SIDDEM and SIPAM), in June 2005, the Brazilian network (BrasilDAT) grow up to 47 LF sensors, covering almost 50％ of the country, from the south to the mid-north, except to the Amazon basin and the northeastern region. In this work, it will be presented a comparison of the CG lightning distribution over Brazil using about one year of LF data from BrasilDAT (from Aug/2005 to Oct/2006), four years (2003 to 2006) of very low frequency (VLF) data from the Worldwide Lightning Location Network (WWLLN) and the eight years (1998 to 2005) of Lightning Sensor Imaging (LIS) data. Although there is only one year of LF data available, this is the first study in Brazil to compare three different lightning detection techniques and to present the CG lightning activity over the south and central part of the country. The CG flash rate maps gathered from the LF, VLF and satellite LIS sensor indicate that the CG lightning activity in the southern and northern regions differ significantly from southeastern Brazil. This might be related to different meteorological conditions associated with the thunderstorms over the main three different regions: large mesoscale convective systems and frontal systems at the South, convection associated with local and intertropical zone at the North and a transition area over the southeast.
Kleber P. Naccarato Osmar Pinto Jr. Robert H. Holzworth
Atmospheric Electricity Group (ELAT), CEA/DGE Instituto Nacional de Pesquisas Espaciais (INPE), S(a) Earth and Space Sciences Research Group University of Washington, USA
国际会议
第13届国际大气电学会议(The 13th International Conference on Atmospheric Electricity)
北京
英文
2007-08-13（万方平台首次上网日期，不代表论文的发表时间）