Pyroclastic Flows and Tornadoes at Sinabung?|
March 6, 2014 | Photovolcanica
“The pyroclastic flow deposits red-hot material on the slope of the volcano. After a few minutes, air heated by the deposit establishes a convective regime and due to the speed of the rising air a series of small tornadoes are formed.” Quoted from the Photovolcanica video release.
IRIS Spots Its Largest Solar Flare|
February 27, 2014 | NASA
“On Jan. 28, 2014, NASA’s Interface Region Imaging Spectrograph, or IRIS, witnessed its strongest solar flare since it launched in the summer of 2013. Solar flares are bursts of x-rays and light that stream out into space, but scientists don’t yet know the fine details of what sets them off.” Quoted from the NASA press release.
February 25, 2014 | MagmaCumLaude
Jessica Ball has a post titled: “Volcanic lightning in the lab and in the ‘wild’“. The “in the lab” part of the post explains how the lightning might be formed.
Related: Brentwood Higman describes volcanic lightning at Redoubt
Popular for January 2013|
February 2, 2014 | Geology.com
The Polar Vortex
Hot Rock Under the Atlas Mountains
Big Rare Earth Find in North Korea?
Horizontal Well Density in the Utica Shale of Ohio
Big Blue Diamond Found in South Africa
Ice Quake in Wisconsin?
Wow! The Best Snowflake Photos
Why Was It So Cold Last Week?
January 30, 2014 | Weather Channel
The Weather Channel has some interesting photos of some snow covered trees from in northern Finland, near the Arctic Circle. If you didn’t know the scale you might think that they are clouds from an atomic or volcanic blast.
Wow! The Best Snowflake Photos|
January 19, 2014 | Today.com
Today.com has a gallery of photographs of individual snowflakes. The are great photographs of a variety of excellent and interesting flakes. Check them out.
Related: How Do Snowflakes Form?
Why Was It So Cold Last Week?|
January 12, 2014 | Climate.gov
An article on Climate.gov explains why a large mass of dense, extremely cold air flowed over much of the United States last week.
From the article… “Meteorologists have known for years that the pattern of the polar vortex determines how much cold air escapes from the Arctic and makes its way to the U.S. during the winter.”
Steam Fog Streaming from the Great Lakes|
January 9, 2014 | NASA Earth Observatory
“A swirling mass of Arctic air moved south into the continental United States in early January 2014. On January 3, the air mass began breaking off from the polar vortex, a semi-permanent low-pressure system with a center around Canada’s Baffin Island. The frigid air was pushed south into the Great Lakes region by the jet stream, bringing abnormally cold temperatures to many parts of Canada and the central and eastern United States.
When the cold air passed over the relatively warm waters of Lake Michigan and Lake Superior, the contrast in temperatures created a visual spectacle. As cold, dry air moved over the lakes, it mixed with warmer, moister air rising off the lake surfaces, transforming the water vapor into fog—a phenomenon known as steam fog.” Quoted from NASA’s Earth Observatory.
Heat Waves in the Southern Hemisphere|
January 9, 2014 | NASA
NASA’s Earth Observatory has published maps showing how Australia and Argentina/Chile have suffered from heat waves during 2013.
Global Chimney in the Pacific
January 9, 2014 | National Science Foundation
“Although few people live in the Western tropical Pacific Ocean region, the remote waters there affect billions of people by shaping climate and air chemistry worldwide.
Next week, scientists will head to the region to better understand its influence on the atmosphere–including how that influence may change in coming decades if storms over the Pacific become more powerful with rising global temperatures.” Quoted from the NSF press release.
January 9, 2014 | Cameron Beccario
Cameron Beccario has created a rotatable, zoomable, tiltable globe that has a “visualization of global weather conditions as forecasted by supercomputers and updated every three hours”. It can help you understand your weather.
Check it out. To rotate or tilt you can grab the globe by clicking your mouse on a point, holding the button, and dragging in the direction that you want to tilt or rotate. To zoom, just double click on the point that you want to see closer.
The Polar Vortex|
January 7, 2014 | Los Angeles Times
A moving mass of dense, cold, Arctic air known as a “polar vortex” is bringing severe temperatures and strong winds to much of the United States and as far south as the Gulf of Mexico.
What Causes Earthquake Lights?|
January 7, 2014 | Nature.com
“A new catalogue of earthquake lights — mysterious glows sometimes reported before or during seismic shaking — finds that they happen most often in geological rift environments, where the ground is pulling apart.” Quoted from the Nature article.
Aurorae Over Alaska|
December 19, 2013 | USA.gov
The USA.gov blog has a number of photos of aurorae over Alaska from the Bureau of Land Management.
The Temperature Mystery of Planetary Atmospheres|
December 19, 2013 | University of Washington
An atmospheric peculiarity the Earth shares with Jupiter, Saturn, Uranus and Neptune is likely common to billions of planets, and knowing that may help in the search for potentially habitable worlds.
Volcanic Lightning in a Lab?|
December 19, 2013 | National Geographic
National Geographic has a video that shows a laboratory simulation of volcanic lightning in a lab. See volcanic lightning in Alaska here.
Snow in the Middle East?|
December 17, 2013 | NASA's Earth Observatory
NASA’s Earth Observatory has a satellite image showing snow on the ground from a recent storm in the Middle East. Jerusalem had over one foot of snow, knocking out power for thousands of households. Amman, Jordan received about eighteen inches.
December 12, 2013 | National Geographic
National Geographic has an article on “green lightning, which is more common than most people realize.
A Record Temperature of Minus 93C|
December 10, 2013 | BBC
Using satellite thermal sensors, researchers have determined that a record low temperature of approximately minus 93.2C occurred on August 10, 2010 at a location in the center of Antarctica.
Above the Clouds|
December 5, 2013 | USA.gov
“This photo shows what’s known as a cloud inversion at Mather Point on the South Rim of the Grand Canyon.” Quoted from the USA.gov blog.
NPS Photo by Erin Whittaker. Get a better view.
November 26, 2013 | NASA via USA.gov
“On the left, bright green auroras appear to emanate from the largest glacier in Iceland as if it’s a volcano. On the right, clouds appear tinged with the green light reflecting from the auroras.” Quoted from the NASA image release.
November 17, 2013 | CNN
Tornadoes have severely damaged several communities in Illinois and Indiana, and continue moving east. Several people have been killed and neighborhoods have been completely destroyed.
Haiyan Windspeed Map|
November 12, 2013 | NASA Earth Observatory
NASA’s Earth Observatory has a map showing a snapshot of wind direction and speed as Typhoon Haiyan approached the Philippines.
Why Does it Rain More in the Northern Hemisphere?|
October 30, 2013 | University of Washington
“It rains more in the Northern Hemisphere because it’s warmer,” said corresponding author Dargan Frierson, a UW associate professor of atmospheric sciences. “The question is: What makes the Northern Hemisphere warmer? And we’ve found that it’s the ocean circulation.” Quoted from the University of Washington press release.
The Magnetic Storm of Halloween 2003|
October 29, 2013 | USGS
“Ten years ago during the Halloween of 2003, while children in costumes paraded door-to-door for treats, the Sun was playing its own tricks with planet Earth.” Quoted from the USGS press release.