lightning
gregladen | November 14, 2014A new study just out in Science suggests that we will have an increase in lightning strikes of about 12 percent for every degree C of global warming. That could add up. From the abstract:
Lightning plays an important role in atmospheric chemistry and in the initiation of wildfires, but the impact of global warming on lightning rates is poorly constrained. Here we propose that the lightning flash rate is proportional to the convective available potential energy (CAPE) times the precipitation rate. Using observations, the product of CAPE and precipitation explains 77% of the variance in the…
gregladen | June 7, 2013Cold Fusion was first reported in 1989. The original experiment was supposed to have produced extra heat that could not be explained wiht chemistry or electronics, so naturally, fusion was considered. Contrary to popular belief, that original experiment has been replicated successfully. The problem isn't that the first experiment produced actual extra heat and no one doing the same experiment could match that result. Rather, none of the attempts at using this experimental set up worked, including the first one. So, yes, the experiment was successfully replicated, and in all cases,…
esiegel | June 8, 2012"Building one space station for everyone was and is insane: we should have built a dozen." -Larry Niven
Here on the solid ground of the Earth, the Sun and Moon rise and set on a daily basis. During the hours where the Sun is invisible, blocked by the solid Earth, the stars twirl overhead in the great canopy of the night sky.
Image credit: Chris Luckhardt at flickr.
In the northern hemisphere, they appear to rotate around the North Star, while in the southern hemisphere, the stars appear to rotate about the South Celestial Pole. The longer you observe -- or for photography, the longer you…
illconsidered | July 29, 2010I lived in Tampa Bay, Florida for 6 months or so. They say it is the lightning capital of the world, I don't know, but there was an awful lot. I loved it!
This is not Tampa, but you get the picture:
(from APOD)
illconsidered | April 21, 2010Don't miss April 19th's APOD, a truly awsome sight!
And while on the subject of Eyjafjallajokull and my recent post about it, readers should be aware of a correction on the source site. The best estimate of CO2 is in fact 150,000 tons per day, not 7400, with a possible maximum of 300,000 tons per day. So the graphic is much less compelling, but the story of Joe vs the Volcano is not affected.
eklemetti | February 10, 2010News for the snowy (well, here) midweek:
Lava flows from Kilauea surround an old structure at Royal Gardens in Hawai`i.
A hearty thanks to all the Eruptions readers who offered advice on where to find a couple of great volcano videos I've been trying to track down. I think I've found copies I can get a hold of at the USGS and discovered that Discover Your Northwest (formerly the NW Interpretative Assoc.) is expecting to get a DVD version of one of the videos this spring.
The folks at the Astronomy Picture of the Day put up this great image of strombolian eruptions and lightning at Sakurajima…
eklemetti | January 28, 2010Some news for the last Friday in January:
Volcanic lightning captured over Redoubt in March 2009.
Tungurahua in Ecuador continues to erupt. Yesterday, the volcano spread ash over much of central Ecuador. Apparently people in Ecuador aren't taking the hazard of ash too seriously, with many ignoring recommendations to wear masks when the ash is falling. Over 50 explosions have been recorded over the last 24 hours at the volcano according to the Ecuadorian Instituto GeofÃsico, most of them small to moderate.
We also have a new USGS/Smithsonian Institute Volcano Activity Report. Much of the "new…
rallain | February 15, 2009Someone complained about a teacher using this question and the answer was disputed. After some time, the teacher claimed that the answer was that lightning is static electricity because she looked it up on the internet. So, I decided to look also, here is what I found searching for "what kind of electricity is lightning?" in google:
Electricity Facts - Dialogue for Kids (Idaho Public Television)
A couple of complaints about this site:
First, I am not fond of the term "Science Facts". What is a science fact? Something that is proven true? This really is not how science works.
Second, I am not…