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

Pinto, I. R. C. A.; Pinto, O.; Gomes, M. A. S. S.; Ferreira, Nelson Jesus

doi:10.5194/angeo-22-697-2004

Cited by 48 publications

(34 citation statements)

References 13 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…A significant enhancement of approximately 60% and 42% are observed, respectively, for negative and positive flash density over and downwind of the city, compared to the nearby surrounding areas. The percentage increase in the flash density found in this study corresponds well with the results reported by Wescott (1995) and , but it is bit low compared with the results found by Pinto et al (2004). The spatial distribution of the percentage of positive flashes over Seoul and nearby areas has been depicted in Fig.…”

Section: Resultssupporting

confidence: 79%

Characteristics of cloud-to-ground lightning activity over Seoul, South Korea in relation to an urban effect

Kar

Liou

2007

Ann. Geophys.

View full text Add to dashboard Cite

Abstract. Cloud-to-ground (CG) lightning flash data collected by the lightning detection network installed at the Korean Meteorological Administration (KMA) have been used to study the urban effect on lightning activity over and around Seoul, the largest metropolitan city of South Korea, for the period of 1989-1999. Negative and positive flash density and the percentage of positive flashes have been calculated. Calculation reveals that an enhancement of approximately 60% and 42% are observed, respectively, for negative and positive flash density over and downwind of the city. The percentage decrease of positive flashes occurs over and downwind of Seoul and the amount of decrease is nearly 20% compared to upwind values. The results are in good agreement with those obtained by and Westcott (1995). CG lightning activities have also been considered in relation to annual averages of PM 10 (particulate matter with an aerodynamic diameter smaller than 10 µm) and sulphur dioxide (SO 2 ) concentrations. Interesting results are found, indicating that the higher concentration of SO 2 contributes to the enhancement of CG lightning flashes. On the other hand, the contribution from PM 10 concentration has not appeared in this study to be as significant as SO 2 in the enhancement of CG lightning flashes. Correlation coefficients of 0.33 and 0.64 are found between the change in CG lightning flashes and the PM 10 and SO 2 , respectively, for upwind to downwind areas, suggesting a significant influence of the increased concentration of SO 2 on the enhancement of CG flashes.

show abstract

Section: Resultssupporting

confidence: 79%

Characteristics of cloud-to-ground lightning activity over Seoul, South Korea in relation to an urban effect

Kar

Liou

2007

Ann. Geophys.

View full text Add to dashboard Cite

show abstract

“…Pinto et al [2004] studied the lightning activity over Belo Horizonte, southeastern Brazil, and nearby surrounding areas. The authors indicated a significant enhancement of approximately 100% in the ÀCG flash density and 50% in the +CG flash density over and downwind of the city, compared with the other adjacent areas.…”

Section: General Physical Properties Of Lightning In Prdmentioning

confidence: 99%

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

et al. 2014

View full text Add to dashboard Cite

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.

show abstract

“…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.

Self Cite

View full text Add to dashboard Cite

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

show abstract

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

Cited by 48 publications

References 13 publications

Characteristics of cloud-to-ground lightning activity over Seoul, South Korea in relation to an urban effect

Characteristics of cloud-to-ground lightning activity over Seoul, South Korea in relation to an urban effect

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

Contact Info

Product

Resources

About