@inproceedings{6b4c6a1aa23744d685725a6e8eb6a992,
title = "Characteristics of negative cloud-to-ground lightning over land and ocean",
abstract = "We examined peak currents and magnetic field risetimes for negative return strokes occurring over land and ocean in Florida reported by the U.S. National Lightning Detection Network (NLDN). The risetimes were measured by a single NLDN sensor located less than two kilometers from the coastline in Florida. We analyzed lightning occurring in five circular regions, each with 50 km diameter. 69% and 72% of the flashes over land and ocean, respectively, contained both NLDN-reported cloud pulses and CG strokes in western Florida. In eastern Florida, 59% of the flashes over land and 49% and 46% of the flashes over the two oceanic regions contained both NLDN-reported cloud pulses and CG strokes. The percentage of flashes that had at least one NLDN-reported negative cloud pulse prior to the first negative CG stroke was found to be about the same over land and ocean. The median NLDN-reported negative first stroke peak current over ocean was found to be higher than that over land. The median threshold-to-peak, 10-to-90%, and 10-to-50% magnetic field risetimes were found to be somewhat longer and the median 50-to-90% risetime slightly shorter for return strokes occurring over ocean than those for return strokes over land.",
keywords = "Characteristics, Magnetic fields, Negative cloud-to-ground lightning, Oceanic lightning, Peak current, Return strokes, Risteime",
author = "Amitabh Nag and Cummins, {Kenneth L.}",
year = "2016",
month = dec,
day = "19",
language = "English (US)",
series = "2016 33rd International Conference on Lightning Protection, ICLP 2016",
publisher = "Institute of Electrical and Electronics Engineers Inc.",
booktitle = "2016 33rd International Conference on Lightning Protection, ICLP 2016",
note = "33rd International Conference on Lightning Protection, ICLP 2016 ; Conference date: 25-09-2016 Through 30-09-2016",
}