Change search
ReferencesLink to record
Permanent link

Direct link
First versus subsequent return-stroke current and field peaks in negative cloud-to-ground lightning discharges
University of Florida, Gainesville, USA.
University of Florida, Gainesville, USA.
Austrian Electrotechnical Association (OVE), Vienna, Austria.
National Institute of Space Research, Sa˜o Jose´ dos Campos, Brazil.
Show others and affiliations
2008 (English)In: Journal of Geophysical Research, ISSN 0148-0227, E-ISSN 2156-2202, Vol. 113, no D19, D19112- p.Article in journal (Refereed) Published
Abstract [en]

We examine relative magnitudes of electric field peaks of first and subsequent return strokes in negative cloud-to-ground lightning flashes recorded in Florida, Austria, Brazil, and Sweden. On average, the electric field peak of the first stroke is appreciably, 1.7 to 2.4 times, larger than the field peak of the subsequent stroke ( except for studies in Austria where the ratio varies from 1.0 to 2.3, depending on methodology and instrumentation). Similar results were previously reported from electric field studies in Florida, Sweden, and Sri Lanka. For comparison, directly measured peak currents for first strokes are, on average, a factor of 2.3 to 2.5 larger than those for subsequent strokes. There are some discrepancies between first versus subsequent stroke intensities reported from different studies based on data reported by lightning locating systems (LLS). The ratio of LLS-reported peak currents for first and subsequent strokes confirmed by video records is 1.7 to 2.1 in Brazil, while in the United States ( Arizona, Texas, Oklahoma, and the Great Plains) it varies from 1.1 to 1.6, depending on methodology used. The smaller ratios derived from the LLS studies are likely to be due to poor detection of relatively small subsequent strokes. The smaller values in Austria are possibly related ( at least in part) to the higher percentage ( about 50% versus 24-38% in other studies) of flashes with at least one subsequent stroke greater than the first. The effects of excluding single-stroke flashes or subsequent strokes in newly formed channels appear to be relatively small.

Place, publisher, year, edition, pages
2008. Vol. 113, no D19, D19112- p.
National Category
Earth and Related Environmental Sciences Engineering and Technology
URN: urn:nbn:se:kth:diva-62541DOI: 10.1029/2007JD009729ISI: 000259988300005OAI: diva2:480939
QC 20120217Available from: 2012-01-20 Created: 2012-01-19 Last updated: 2012-02-17Bibliographically approved

Open Access in DiVA

No full text

Other links

Publisher's full text

Search in DiVA

By author/editor
Thottappillil, Rajeev
In the same journal
Journal of Geophysical Research
Earth and Related Environmental SciencesEngineering and Technology

Search outside of DiVA

GoogleGoogle Scholar
The number of downloads is the sum of all downloads of full texts. It may include eg previous versions that are now no longer available

Altmetric score

Total: 98 hits
ReferencesLink to record
Permanent link

Direct link