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Old 24-06-2005, 11:10   #1
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Lightning Information (links)

Some excellent on-line resources on ‘Lightning & Boats’ - Goto:

“Lightning And Sailboats” - by Ewen M Thomson, Univ. Fla. 1992. Sea Grant Publication
The best basic lightning primer for boaters
http://www.thomson.ece.ufl.edu/lightning/

“The Applicability of Lightning Elimination Devices to Substations and Power Lines” - by Abdul M. Mousa, BC Hydro, IEEE Transactions on Power Delivery, Oct 1998.
Read this one if you believe lightning eliminators (static dissipaters) really work.
http://www.strikeshield.com/Lightnin...issipators.pdf

“Structural Lightning Safety” - NLSI
http://www.lightningsafety.com/nlsi_lhm.html

”Marine Grounding Systems” - by Stan Honey
http://www.sailmail.com/grounds.htm

“Understanding Lightning Protection” - by Bill Laudeman
http://www.boatus.com/seaworthy/swlightning.asp

“Boating And Lightning Protection” - by William J. Becker. Univ of Florida Extension
http://www.cdc.gov/nasd/docs/d000001...7/d000007.html

“Cone Of Protection From Lightning” - Boatsafe
http://www.boatsafe.com/nauticalknowhow/lightning.htm

“Lightning Protection 101" - by Sue & Larry (Sailnet)
http://www.sailnet.com/collections/a...leid=suelar139

From Bolt Lightning Protection:
“ABOUT LIGHTNING”
http://www.boltlightningprotection.c...htningchap.htm
“Elemental Faraday Cage” (FC/LPS)
http://www.boltlightningprotection.c...raday_Cage.htm

HTH,
Gord May
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Old 02-09-2024, 06:54   #2
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Re: Lightning Information (links)

Climate change could cause more lightning, sparking more wildfires

According to a 2014 study [1], lightning strikes are expected to increase, about 12 per cent, for every degree Celsius, the global average temperature increases.
Lightning occurs more frequently when it is hotter, than when it is colder.
Currently there are around 25 million lightning strikes per year. Romps et al. [1] constructed a proxy, based on the energy available, to make air rise in the atmosphere, and on precipitation rates, to model the frequency of lightning strikes, across the continental United States.
They predict that the number of lightning strikes will increase, by about 12% [± 5%], for every degree C of rise in global average air temperature, and about 50% over this century.

Two main factors influence how much lightning a region gets: precipitation, and how much energy there is in the atmosphere [AKA: convective available potential energy, ‘CAPE’].
On a warm day, hot air rises, creating an updraft. When it collides with cool air, higher in the sky, a cumulonimbus [thundercloud] could form.
CAPE measures how strong that updraft is, and the general instability in the atmosphere. The higher the instability, the more likely a thunderstorm will roll in.

While thunderstorms are typically associated with rainfall, snow, and heavy winds; they can sometimes form in hot, dry conditions — a phenomenon known as ‘dry lightning’.
Dry lightning is essentially regular cloud-to-ground lightning - the distinction being, it happens with little or no rainfall, at the surface.
A 2023 study [2] , co-authored by Dmitri Kalashnikov, looked at the conditions that prompt dry lightning.
In his study, Kalashnikov says that dry lightning sparked half of the wildfires in California, in 2020, further highlighting the risk this phenomenon can pose.

A new study [3], in Canadian Journal of Forest Research examined Alberta's 2023 wildfire season, the worst on record. The study found lightning started 13 wildfires in May, alone. Usually, Alberta will see one fire started by lightning in May.

[1] “Projected increase in lightning strikes in the United States due to global warming” ~ by David M. Romps et al
https://www.science.org/doi/10.1126/science.1259100

[2] “Lightning-Ignited Wildfires in the Western United States: Ignition Precipitation and Associated Environmental Conditions” ~ by Dmitri A. Kalashnikov et al
https://agupubs.onlinelibrary.wiley....9/2023GL103785

[3] “Alberta’s 2023 wildfires: context, factors and futures” ~ by Jennifer Beverly & Dave Schroeder
https://cdnsciencepub.com/doi/10.1139/cjfr-2024-0099

See also:

“Severe storm threat builds with the heat on the western Prairies” ~ by The Weather Network, Forecast Centre
https://www.theweathernetwork.com/en...a-saskatchewan
[quote=TWN] “... ome of the storms throughout the foothills and into central Alberta could turn severe with strong wind gusts, large hail, and heavy rainfall the main risks. Residents should also remain alert for the potential for dry lightning, which could spark wildfires...” [/quote

“Brazil is on fire, and both crime and climate change are to blame” ~ by Sheena Goodyear · CBC Radio
https://www.cbc.ca/radio/asithappens...rime-1.7307415
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Old 02-09-2024, 07:23   #3
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Re: Lightning Information (links)

Gord you may know of these links too, where you can see the lightning hits - it is fascinating to watch https://www.lightningmaps.org/#m=oss...d=2;dl=2;dc=0;
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Old 02-09-2024, 08:29   #4
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Re: Lightning Information (links)

https://map.blitzortung.org/#2.71/31.36/-80.16


real time from sensor


a side dish, but a useful one, to visualise the importance of the matter


cheers,
b.
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