Fechar

@InProceedings{SaraivaCamCumAntPin:2014:AnFoSt,
               author = "Saraiva, Ant{\^o}nio Carlos V. and Campos, Leandro Zanella de 
                         Souza and Cummins, Kenneth L. and Antunes, Larissa and Pinto Jr., 
                         Osmar",
          affiliation = "{Instituto Nacional de Pesquisas Espaciais (INPE)} and {Instituto 
                         Nacional de Pesquisas Espaciais (INPE)} and {The University of 
                         Arizona} and {Instituto Nacional de Pesquisas Espaciais (INPE)} 
                         and {Instituto Nacional de Pesquisas Espaciais (INPE)}",
                title = "Analysis of forked strokes characteristics over southeastern 
                         Brazil during the summer season of 2013",
            booktitle = "Proceedings...",
                 year = "2014",
         organization = "International Lightning Detection Conference, 23. (ILDC); and 
                         International Lightning Meteorology Conference, 5 (ILMC).",
            publisher = "Vaisala",
                 note = "Informa{\c{c}}{\~o}es Adicionais: The objective of this work is 
                         the analysis of overall characteristics of 35 cloud-to-ground (CG) 
                         strokes that presented two or more contact points to the ground in 
                         a millisecond scale. This dataset includes both the classical 
                         forked strokes (first observed in streak camera records) and the 
                         new class of this type of phenomenon, called upward illumination 
                         strokes, introduced in more recent works. The genesis of the 
                         latter is very similar to the classical forked strokes, i. e., one 
                         branch from the main trunk of a stepped leader produces a second 
                         stroke after the first return stroke occurs. The main difference 
                         from the classical forked stroke events are: a) UI stroke channels 
                         appear to completely disconnect from the main trunk during its 
                         development, b) the time between strokes is longer than in the 
                         case of classical forked strokes and c) the peak currents of the 
                         UI strokes are, usually, very small. From the visual inspection of 
                         the 35 selected events, 22 were classified as forked strokes and 
                         13 UI strokes. A new name was given to the broad class of strokes 
                         that present two or more contact points in a millisecond and 
                         sub-millisecond scale, multi ground contact strokes (MGCS). 
                         Subclasses received the names forked strokes and UI strokes , 
                         related to the previous findings from the literature. All MGCS 
                         flashes were recorded during the summer season of 2013 in 
                         Southeastern Brazil as part of a five-day campaign employing a 
                         network of high-speed camera sensors known as the RAMMER network. 
                         The high-speed video records were obtained by three identical 
                         cameras installed in S{\~a}o Jos{\'e} dos Campos and a fourth 
                         mobile camera (whose only difference from the other three is its 
                         capability to record colored images). All four cameras were set up 
                         for recording at 1200 x 500 pixels spatial resolution, 2500 frames 
                         per second, and 400- s time interval between frames. A total of 
                         357 negative CG flashes were recorded. The physical processes that 
                         generate either forked strokes and UI st.",
             keywords = "atmospheric electricity, lightning, lightning physics, forked 
                         strokes, upward illumination strokes.",
             abstract = "The objective of this work is the analysis of overall 
                         characteristics of 35 cloud-to-ground (CG) strokes that presented 
                         two or more contact points to the ground in a millisecond scale. 
                         This dataset includes both the classical forked strokes (first 
                         observed in streak camera records) and the new class of this type 
                         of phenomenon, called upward illumination strokes, introduced in 
                         more recent works. The genesis of the latter is very similar to 
                         the classical forked strokes, i. e., one branch from the main 
                         trunk of a stepped leader produces a second stroke after the first 
                         return stroke occurs. The main difference from the classical 
                         forked stroke events are: a) UI stroke channels appear to 
                         completely disconnect from the main trunk during its development, 
                         b) the time between strokes is longer than in the case of 
                         classical forked strokes and c) the peak currents of the UI 
                         strokes are, usually, very small. From the visual inspection of 
                         the 35 selected events, 22 were classified as forked strokes and 
                         13 UI strokes. A new name was given to the broad class of strokes 
                         that present two or more contact points in a millisecond and 
                         sub-millisecond scale, multi ground contact strokes (MGCS). 
                         Subclasses received the names forked strokes and UI strokes, 
                         related to the previous findings from the literature. All MGCS 
                         flashes were recorded during the summer season of 2013 in 
                         Southeastern Brazil as part of a five-day campaign employing a 
                         network of high-speed camera sensors known as the RAMMER network. 
                         The high-speed video records were obtained by three identical 
                         cameras installed in S{\~a}o Jos{\'e} dos Campos and a fourth 
                         mobile camera (whose only difference from the other three is its 
                         capability to record colored images). All four cameras were set up 
                         for recording at 1200 x 500 pixels spatial resolution, 2500 frames 
                         per second, and 400-\μs time interval between frames. A 
                         total of 357 negative CG flashes were recorded. The physical 
                         processes that generate either forked strokes and UI strokes are 
                         discussed in details. RAW data from BrasilDAT network was used to 
                         identify and give more information about the MGCS, such as: peak 
                         current estimates and precise interstroke intervals in the 
                         microsecond range. Plots of time intervals between strokes versus 
                         peak current added new information on the physical characteristics 
                         and distinctive features of UI and forked strokes.",
  conference-location = "Tucson",
      conference-year = "mar. 18-19, 2014 / mar. 20-21, 2014",
                label = "lattes: 4161737266837399 2 SaraivaCamCumAntPin:2014:AnFoSt",
             language = "en",
           targetfile = "Saraiva-Analysis of Forked Strokes Characteristics over 
                         Southeastern Brasil-2014-ILDC-ILMC.pdf",
                  url = "http://www.vaisala.com/en/events/ildcilmc/Documents/2014%20ILDC-ILMC%20Agenda.pdf",
               volume = "1",
        urlaccessdate = "29 mar. 2024"
}


Fechar