From NASA Armstrong: “Schlieren Images Reveal Supersonic Shock Waves”

Originally posted on Science Springs:

NASA

NASA

NASA Armstrong Flight Research Center

Aug. 25, 2015
Peter Merlin, Public Affairs
NASA Armstrong Flight Research Center

1This schlieren image dramatically displays the shock wave of a supersonic jet flying over the Mojave Desert. Researchers used NASA-developed image processing software to remove the desert background, then combined and averaged multiple frames to produce a clear picture of the shock waves.
Credits: NASA Photo

NASA is using a 21st century version of schlieren imagery, invented by a German physicist in 1864, to visualize supersonic flow phenomena with full-scale aircraft in flight.
Credits: NASA Photo

NASA researchers in California are using a modern version of a 150-year-old German photography technique to capture images of shock waves created by supersonic airplanes. Over the past five years scientists from NASA’s Armstrong Flight Research Center at Edwards Air Force Base and Ames Research Center at Moffett Field have teamed up to demonstrate how schlieren imagery, invented in 1864 by…

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From COSMOS: “Could buckyballs make any metal into a magnet?”

Originally posted on Science Springs:

Cosmos Magazine bloc

COSMOS

24 Aug 2015
Viviane Richter

A layer of carbon can bestow the powers of magnetism. Viviane Richter explains.

1A magnetic field: Magnets have become crucially important in the computer age, so researchers are seeking to learn how to magnetise metals without the help of rare Earth elements.Credit: Science Photo Library / Getty Images

In a feat of modern day alchemy, scientists have successfully turned non-magnetic metals into magnets. Oscar Cespedes at the University of Leeds and his team published their magnetic recipe in Nature in August. The key ingredient? A dusting of carbon.

“This is a new way of making magnets – it opens up a new field!” says Naresh Dalal from Florida State University, who also researches magnetic materials.

Magnets are crucial in the age of big data. We’ve generated almost as much data in the past two years as during all of human history. To generate and…

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Hurricane expert: 10 years after Katrina, North Atlantic hurricane activity well below normal

Originally posted on Watts Up With That?:

Noted hurricane expert Dr. Philip Klotzbach of Colorado State University has had some interesting discussion and stats on his Twitter feed, for example:

10 years ago today, TD 10’s remnants brewed north of Hispaniola. 8 days later, Katrina was a Category 5 in the Gulf.

hurricane-danny-iss Hurricane Danny, the first hurricane of the 2015 Atlantic season, is seen in this picture taken by NASA astronaut Scott Kelly taken from the International Space Station Thursday.

It is worth noting that 2005 had 11 named storms, seven of which hit land and five of which caused major damage. In contrast to that era, we’ve recently seen the fourth named storm in the Atlantic, Hurricane Danny, fizzle out back to tropical storm status last Saturday, and now as a tropical depression is listed as remnant status by NHC. Given NOAA’s recent update for a below normal season, this isn’t surprising.

hurricane-danny-remnants-nhc

The remnants of…

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Arctic Amplification?

Originally posted on Science Matters:

Discussions of the Arctic often include references to “Polar Amplification,” defined thusly by climate scientists (wikipedia):

“Polar amplification refers to the observation that any change in the net radiation balance (for example greenhouse intensification) tends to produce a larger change in temperature near the poles than the planetary average.”

NSIDC adds in the notion of positive feedbacks and concern over “tipping points.”

“Scientists have already seen evidence that positive feedbacks are occurring in the Arctic. They call this Arctic amplification. Predicting the Arctic climate is difficult. Some of the changes in the Arctic could also have negative feedback effects, or effects that reduce the amount of warming. For example, if warm temperatures make the Arctic growing season longer, more plants can survive and take up more carbon from the air. However, most evidence suggests that the positive feedback effects outweigh the negative effects. A recent report by NOAA concluded that…

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From SPACE.com: “Lagrange Points: Parking Places in Space”

Originally posted on Science Springs:

space-dot-com logo

SPACE.com

August 19, 2015
Elizabeth Howell

1Diagram of the Lagrange points associated with the sun-Earth system

A Lagrange point is a location in space where the combined gravitational forces of two large bodies, such as Earth and the sun or Earth and the moon, equal the centrifugal force felt by a much smaller third body. The interaction of the forces creates a point of equilibrium where a spacecraft may be “parked” to make observations.

These points are named after Joseph-Louis Lagrange, an 18th-century mathematician who wrote about them in a 1772 paper concerning what he called the “three-body problem.” They are also called Lagrangian points and libration points.

Structure of Lagrange points

There are five Lagrange points around major bodies such as a planet or a star. Three of them lie along the line connecting the two large bodies. In the Earth-sun system, for example, the first point, L1…

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The EPA …… Polluters, Blackmailers, And Usurpers

craigm350:

Gobsmacked. I would not be surprised if the investigation gets bogged down (note the pun) for years to come so the guilty get distance. This smells and scorches more than the poisoned waters the EPA leave behind.

Originally posted on suyts space:

image

Well, I hadn’t written about the Colorado incident, mostly because it seemed due to incompetence and was an accident. That our federal government is full of incompetents isn’t all that noteworthy, it’s a given.

But, here’s something else that’s a given. The EPA doesn’t function to protect our environment, it functions as an arm to exert governmental control over the private citizenry.

As it turns out, there’s much more to this sordid story than just continuous incompetence from our government.

The EPA has a record of releasing toxic runoff from mines in two tiny Colorado towns that dates to 2005, a local mine owner claims.

The 3-million-gallon heavy-metal spill two weeks ago in Silverton polluted three states and touched off national outrage. But the EPA escaped public wrath in 2005 when. That dump – containing arsenic, lead and other materials – said Todd Hennis, who owns both mines along…

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Astronomer creates music using star oscillations

Originally posted on Tallbloke's Talkshop:

[image credit: etsy.com] [image credit: etsy.com]
Something a bit off-beat here: a paper entitled ‘The Multiperiodic Pulsating Star Y Cam A as a Musical Instrument’. A music extract can be played in the linked Phys.org report. It’s described as ‘a mixed bag of eerie pulsating sounds combined with a simple piano melody.’

Astronomer Burak Ulaş, with the Izmir Turk College Planetarium in Turkey has taken his work into a musical dimension, using star oscillations as a source for a musical composition. He has uploaded a paper describing what he has done along with sheet music and an audio recording of his work to the preprint server arXiv—along with a shout-out to other pioneers in the field, from Kepler to Pythagoras to modern composer scientists Jenő Keuler and Zoltán Kolláth.

Astronomers and other star-gazers have long associated celestial bodies with music, the twinkling of some stars offers a tempting back-beat and some stars…

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Problematic Adjustments And Divergences (Now Includes June Data)

craigm350:

Professor Brown comments later in this article
Why was NCDC even looking at ocean intake temperatures? Because the global temperature wasn’t doing what it was supposed to do!. Why did Cowtan and Way look at arctic anomalies? Because temperatures there weren’t doing what they were supposed to be doing! 
From talking with meteorologists and communications with the UK Met Office this does sadly seem to be the case. Their investigations are not geared towards what is but rather why rather why it is not matching forecasts. Josh had it spot on…

Originally posted on Watts Up With That?:

Guest Post by Professor Robert Brown of Duke University and Werner Brozek, Edited by Just The Facts:

CO2 versus adjustmentsImage Credit: Steven Goddard

As can be seen from the graphic above, there is a strong correlation between carbon dioxide increases and adjustments to the United States Historical Climatology Network (USHCN) temperature record. And these adjustments to the surface data in turn result in large divergences between surface data sets and satellite data sets.

In the post with April data, the following questions were asked in the conclusion: “Why are the new satellite and ground data sets going in opposite directions? Is there any reason that you can think of where both could simultaneously be correct?”
Professor Robert Brown of Duke University had an excellent response the this question here.
To give it the exposure it deserves, his comment is reposted in full below. His response ends with rgb.

Rgbatduke June 10, 2015…

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