| 1. Identity statement | |
| Reference Type | Journal Article |
| Site | mtc-m21b.sid.inpe.br |
| Holder Code | isadg {BR SPINPE} ibi 8JMKD3MGPCW/3DT298S |
| Identifier | 8JMKD3MGP5W34M/3FA44Q4 |
| Repository | sid.inpe.br/mtc-m21b/2013/11.26.16.47.08 (restricted access) |
| Last Update | 2014:02.06.11.20.43 (UTC) administrator |
| Metadata Repository | sid.inpe.br/mtc-m21b/2013/11.26.16.47.09 |
| Metadata Last Update | 2022:03.18.22.15.37 (UTC) administrator |
| DOI | 10.1016/j.atmosres.2012.12.011 |
| ISSN | 0169-8095 |
| Label | scopus 2013-11 |
| Citation Key | CamposSaWaPiKrOr:2014:StAn |
| Title | High-speed video observations of natural cloud-to-ground lightning leaders - A statistical analysis  |
| Project | CNPq (475299/2003-5); FAPESP (03/08655-4); FAPESP (2010/02716-5) |
| Year | 2014 |
| Month | Jan. |
| Access Date | 2024, May 19 |
| Type of Work | journal article |
| Secondary Type | PRE PI |
| Number of Files | 1 |
| Size | 1521 KiB |
| 2. Context | |
| Author | 1 Campos, Leandro Zanella de Souza 2 Saba, Marcelo Magalhães Fares 3 Warner, Tom A. 4 Pinto Jr., Osmar 5 Krider, E. Philip 6 Orville, Richard E. |
| Resume Identifier | 1 2 8JMKD3MGP5W/3C9JHP6 |
| Group | 1 GESATM-CEA-SPG-INPE-MCTI-GOV-BR 2 CST-CST-INPE-MCTI-GOV-BR 3 4 CST-CST-INPE-MCTI-GOV-BR |
| Affiliation | 1 Instituto Nacional de Pesquisas Espaciais (INPE) 2 Instituto Nacional de Pesquisas Espaciais (INPE) 3 Department of Atmospheric Sciences, South Dakota School of Mines and Technology, Rapid City, SD 57701, USA 4 Instituto Nacional de Pesquisas Espaciais (INPE) 5 Institute of Atmospheric Physics, University of Arizona, Tucson, AZ 85721, USA 6 Department of Atmospheric Sciences, Texas A and M University, College Station, TX 77843, USA |
| Author e-Mail Address | 1 leandro.zanella@gmail.com 2 marcelo.saba@inpe.br 3 4 osmar@dge.inpe.br |
| e-Mail Address | marcelo.pazos@inpe.br |
| Journal | Atmospheric Research |
| Volume | 135-136 |
| Pages | 285–305 |
| Secondary Mark | A1_CIÊNCIAS_AMBIENTAIS A1_INTERDISCIPLINAR A2_GEOCIÊNCIAS A2_CIÊNCIAS_AGRÁRIAS_I B1_ENGENHARIAS_IV B1_BIODIVERSIDADE B1_ENGENHARIAS_II B1_MATEMÁTICA_/_PROBABILIDADE_E B1_ENGENHARIAS_III B2_ASTRONOMIA_/_FÍSICA |
| History (UTC) | 2014-02-06 11:20:43 :: administrator :: 2013 -> 2014 2022-03-18 22:15:37 :: administrator -> marcelo.pazos@inpe.br :: 2014 |
| 3. Content and structure | |
| Is the master or a copy? | is the master |
| Content Stage | completed |
| Transferable | 1 |
| Content Type | External Contribution |
| Version Type | publisher |
| Keywords | lightning high-speed camera leaders |
| Abstract | The aim of this investigation is to analyze the phenomenology of positive and negative (stepped and dart) leaders observed in natural lightning from digital high-speed video recordings. For that intent we have used four different high-speed cameras operating at frame rates ranging from 1000 or 11,800 frames per second in addition to data from lightning locating systems (BrasilDat and NLDN). All the recordings were GPS time-stamped in order to avoid ambiguities in the analysis, allowing us to estimate the peak current of and the distance to each flash that was detected by one of the lightning locating systems. The data collection was done at different sites in south and southeastern of Brazil, southern Arizona and South Dakota, USA. A total of 62 negative stepped leaders, 76 negative dart leaders and 29 positive leaders were recorded and analyzed. From these data it was possible to calculate the two-dimensional speed of each observed leader, allowing us to obtain its statistical distribution and evaluate whether or not it is related to other characteristics of the associated flash. In the analyzed dataset, the speeds of positive leaders and negative dart leaders follow a lognormal distribution at the 0.05 level (according to the Shapiro-Wilk test). We have also analyzed how the two-dimensional leader speeds change as they approach ground through two different methodologies. The speed of positive leaders showed a clear tendency to increase while negative dart leaders tend to become slower as they approach ground. Negative stepped leaders, on the other hand, can either accelerate as they get closer to ground or present an irregular development (with no clear tendency) throughout their entire development. For all the three leader types no correlation has been found between the return stroke peak current and the average speed of the leader responsible for its initiation. We did find, however, that dart leaders preceded by longer interstroke intervals cannot present speeds of the order of 107 m s- 1. Finally, we have analyzed the impact of recoil activity during positive leaders over their average speed and the return stroke peak current. Even though the analysis considering the leader speed was not conclusive it was possible to show that there is no apparent minimum or maximum peak current value for return strokes preceded by leaders with or without recoil activity (considering the most common range of values in literature, 20-80 kA). © 2013 Elsevier B.V. All rights reserved. |
| Area | CEA |
| Arrangement 1 | urlib.net > BDMCI > Fonds > Produção pgr ATUAIS > GES > High-speed video observations... |
| Arrangement 2 | urlib.net > BDMCI > Fonds > Produção anterior à 2021 > COCST > High-speed video observations... |
| doc Directory Content | access |
| source Directory Content | there are no files |
| agreement Directory Content | there are no files |
| 4. Conditions of access and use | |
| Language | en |
| Target File | 1-s2.0-S0169809513000057-main.pdf |
| User Group | administrator marcelo.pazos@inpe.br |
| Reader Group | administrator marcelo.pazos@inpe.br |
| Visibility | shown |
| Archiving Policy | denypublisher denyfinaldraft24 |
| Read Permission | deny from all and allow from 150.163 |
| Update Permission | not transferred |
| 5. Allied materials | |
| Linking | 8JMKD3MGP7W/3BA2MDE |
| Mirror Repository | iconet.com.br/banon/2006/11.26.21.31 |
| Next Higher Units | 8JMKD3MGPCW/3F2PBEE 8JMKD3MGPCW/3F3T29H |
| Citing Item List | sid.inpe.br/bibdigital/2013/10.19.20.40 4 sid.inpe.br/bibdigital/2013/10.12.21.02 2 sid.inpe.br/mtc-m21/2012/07.13.14.54.40 1 |
| URL (untrusted data) | http://dx.doi.org/10.1016/j.atmosres.2012.12.011 |
| Dissemination | WEBSCI; PORTALCAPES; COMPENDEX; SCOPUS. |
| Host Collection | sid.inpe.br/mtc-m21b/2013/09.26.14.25.20 |
| 6. Notes | |
| Empty Fields | alternatejournal archivist callnumber copyholder copyright creatorhistory descriptionlevel format isbn lineage mark nextedition notes number orcid parameterlist parentrepositories previousedition previouslowerunit progress rightsholder schedulinginformation secondarydate secondarykey session shorttitle sponsor subject tertiarytype |
| 7. Description control | |
| e-Mail (login) | marcelo.pazos@inpe.br |
| update | |