Evidence of thermal and aerosol effects on the cloud‐to‐ground lightning density and polarity over large urban areas of Southeastern Brazil

Naccarato, Kleber P.; Pinto, O.; Pinto, I. R. C. A.

doi:10.1029/2003gl017496

Cited by 115 publications

(111 citation statements)

References 13 publications

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“…After that, several recent studies (Orville et al, 2001;Soriano and Pablo, 2002;Steiger et al, 2002;Naccarato et. al., 2003) have confirmed this result.…”

Section: Introductionmentioning

confidence: 99%

Urban effect on the characteristics of cloud-to-groundlightning over Belo Horizonte-Brazil

Pinto

Gomes

et al. 2004

Ann. Geophys.

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Abstract. An 8-year climatological analysis (1989)(1990)(1991)(1992)(1993)(1994)(1995)(1996) of lightning network data over Belo Horizonte, a large city located in Southeastern Brazil, and nearby surrounding areas has indicated a significant enhancement of approximately 100% in the negative flash density and of 50% in the positive flash density over and downwind of the city, compared with the other adjacent areas. A decrease of 25% in the percentage of positive flashes was also observed over and downwind of the city. No urban effect was evident in the peak current of both negative and positive flashes. These results are in agreement with the recent results obtained by Steiger et al. (2002) for Houston, except that the strength of the effect is twice larger than in Houston. The reason for this difference is not clear.

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“…After that, several recent studies (Orville et al, 2001;Soriano and Pablo, 2002;Steiger et al, 2002;Naccarato et. al., 2003) have confirmed this result.…”

Section: Introductionmentioning

confidence: 99%

Urban effect on the characteristics of cloud-to-groundlightning over Belo Horizonte-Brazil

Pinto

Gomes

et al. 2004

Ann. Geophys.

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“…Other studies found evidence of thermal, aerosol, and geographic impact on CG lightning physical properties. Modification of lightning density and polarity happened over large urban areas of southeastern Brazil [Naccarato et al, 2003]. Aerosols played a major role in enhancement in lightning activity over two inland metropolitan cities of India [Lal and Pawar, 2011].…”

Section: Introductionmentioning

confidence: 99%

Physical and observable characteristics of cloud‐to‐ground lightning over the Pearl River Delta region of South China

et al. 2014

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Cloud-to-ground (CG) lightning characteristic parameters deduced from the lightning location system (LLS) for five differing microenvironmental areas relative to megacity, city, municipal town, hilly suburban area, and mountainous rural area conditions were examined in our 2009-2011 Pearl River Delta (PRD) study. Our LLS data analysis showed that there were high variation of lightning characteristics and phenomenal changes among these areas. As a supplement to the usual study of physical characteristics, an observation-based methodology had been developed to study the lightning behavior, while the respective thunderstorms were traversing through these observation areas. Special features and phenomenal changes related to the lightning characteristic parameters, such as observable lightning stroke days (OLSDs) and observable lightning stroke frequency and density for an OLSD, were also addressed. Microenvironmental variation due to change in topography, degree of urbanization, urban effect, and thunderstorm strength was found to affect the spatial distribution of lightning stroke and the severity of lightning activities over the observation areas. This approach increases our understanding of lightning in subtropical China. It also tells us more about the behavior of lightning while the thunderstorm traverses through an observation area. This information is lacking in previous studies.

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“…Third, also from Fig. 6a, a large spot (the region in white in the state of São Paulo) of high flash density can be seen, coincident with the location of the city of São Paulo, the largest city of the country with a population larger than 10 million people, suggesting that the urban activity is affecting the thunderstorm activity (Naccarato et al, 2003;Pinto et al, 2004;Farias et al, 2008;Bourscheidt et al, 2012). The effects of orography and urban area are not evident in the low-resolution data in Figs.…”

Section: Resultsmentioning

confidence: 86%

Thunderstorm incidence in southeastern Brazil estimated from different data sources

Pinto¹,

Naccarato

Pinto

2013

Ann. Geophys.

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This paper describes a comparative analysis of the thunderstorm incidence in southeastern Brazil obtained from thunderstorm days observed at two different epochs (from 1910 to 1951 and from 1971 to 1984) and from lightning data provided by the Brazilian lightning location system RINDAT (from 1999 to 2006) and the Lightning Imaging Sensor (LIS) on board the Tropical Rainfall Measuring Mission (TRMM) satellite (from 1998 to 2010). The results are interpreted in terms of the main synoptic patterns associated with thunderstorm activity in this region, indicating that the prevailing synoptic pattern associated with thunderstorm activity is the occurrence of frontal systems and their modulation by the South Atlantic Convergence Zone (SACZ) and topography. Evidence of urban effects is also found. The results are also discussed in the context of practical applications involving their use in the Brazilian lightning protection standards, suggesting that the present version of the Brazilian standards should be revised incorporating RINDAT and LIS data. Finally, the results are important to improve our knowledge about the limitations of the different techniques used to record the thunderstorm activity and support future climatic studies

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Evidence of thermal and aerosol effects on the cloud‐to‐ground lightning density and polarity over large urban areas of Southeastern Brazil

Cited by 115 publications

References 13 publications

Urban effect on the characteristics of cloud-to-groundlightning over Belo Horizonte-Brazil

Urban effect on the characteristics of cloud-to-groundlightning over Belo Horizonte-Brazil

Physical and observable characteristics of cloud‐to‐ground lightning over the Pearl River Delta region of South China

Thunderstorm incidence in southeastern Brazil estimated from different data sources

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