Archive for the ‘EO’s Satellite Puzzler’ Category

April Puzzler Answer: Yosemite’s Granite

April 25th, 2014 by Adam Voiland

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Congratulations to Earth Matters reader Mike G. for being the first to solve our April Puzzler! As Mike pointed out, this image shows granite outcrops in Yosemite National Park. Over on Facebook, Cooper Girard was the first to get the location; he also sagely noted that Yosemite’s landscape is the product of a granitic pluton being uplifted by tectonic processes and then sculpted by glacial ice.  Read our April 26, 2014, Image of the Day for more details about the image, which was captured by the Landsat 8 satellite. After you’ve looked over the satellite image, check out this gallery of historical photography from U.S. Geological Survey geologist Francois Matthes showing many granite outcrops in the park.  I’ve included a few of my favorite shots of Nevada Falls, Liberty Cap, Cascade Cliffs, and Mount Starr King below, but there are many more to see. At the very bottom of this post, you can also watch a nice video featuring geologists explaining how the granite formed.

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Yosemite National Park, California. Giant Stairway from Glacier Point. In the center is Nevada Fall, which leaps from the upper step, flanked by Liberty Cap. Below is Vernal Fall, which leaps from the lower step. On the far side of Little Yosemite Valley, which is behind Liberty Cap, are the water-streaked Cascade Cliffs, and beyond are the peaks of the High Sierra mantled with snow. At the left is Mount Florence. At the right is Mount Clark. Photo by A.C. Pillsbury, circa 1914. Plate 10, U.S. Geological Survey Professional paper 160.
libertycap
Yosemite National Park, California. Front of Liberty Cap and Mount Broderick. Their sheer, hackly fronts were subjected to the quarrying action of the Merced Glacier. The V-shaped cleft between them was gouged out along a narrow zone of shattered rock. Circa 1914. Plate 44-B, U.S. Geological Survey Professional paper 160.
mountstarrking
Yosemite National Park, California. End of an exfoliating spur on the west side of the Starr King group. This spur was not overtopped by the earlier ice. It owes its smoothly rounded form wholly to exfoliation. Circa 1913.
cascadecliffs
Yosemite National Park, California. Little Yosemite Valley. Through this broad antechamber the Merced River approaches the main valley. On the right are the Cascade Cliffs streaked by innumerable temporary cascades; on the left is Sugar Loaf (Bunnell Point). Circa 1914. Plate 4-A, U.S. Geological Survey Professional paper 160.

April Puzzler

April 21st, 2014 by Adam Voiland

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Every month we offer a puzzling satellite image here on Earth Matters. The April 2014 puzzler is above. Your challenge is to use the comments section to tell us what the image shows, what part of the world we are looking at, when the image was acquired, and why the scene is interesting.

How to answer. Your answer can be a few words or several paragraphs. (Try to keep it shorter than 200 words). You might simply tell us what part of the world an image shows. Or you can dig deeper and explain what satellite and instrument produced the image, what spectral bands were used to create it, or what is compelling about some obscure speck in the far corner of an image. If you think something is interesting or noteworthy, tell us about it.

The prize. We can’t offer prize money, but, we can promise you credit and glory (well, maybe just credit). Roughly one week after a puzzler image appears on this blog, we will post an annotated and captioned version as our Image of the Day. In the credits, we’ll acknowledge the person who was first to correctly ID the image. We’ll also recognize people who offer the most interesting tidbits of information about the geological, meteorological, or human processes that have played a role in molding the landscape. Please include your preferred name or alias with your comment. If you work for or attend an institution that you want us to recognize, please mention that as well.

Recent winners. If you’ve won the puzzler in the last few months or work in geospatial imaging, please sit on your hands for at least a few days to give others a chance to play.

Releasing Comments. Savvy readers have solved many of our puzzlers after only a few minutes or hours. To give more people a chance to play, we may wait between 24-48 hours before posting the answers we receive in the comment thread.

March Puzzler Answer: Nalabana Bird Sanctuary

March 31st, 2014 by Adam Voiland

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I thought the March Puzzler would be an easy one, but it turned out to be one of the more difficult we’ve posted. As explained in our March 29, 2014, Image of the Day, the image shows Nalabana Bird Sanctuary in India’s Chilika Lake. Despite more than 50 guesses on Earth Matters and 500 on Facebook, nobody came up with the exact location. However, many readers (including Steve Martin and Wendy Spiteri) did recognize the shrimp farms or that it was somewhere in India.

I kept the caption to a  few paragraphs, but there’s a lot more that could be written about Chilika Lake. It’s a beautiful and fascinating place that faces environmental, economic, and political challenges that are as complicated as anywhere in the world. In 2002, for instance, authorities dredged a new connection with the Bay of Bengal after silt narrowed the existing mouth and made it more difficult for salty water to enter the lake. While the new mouth increased salinity levels, it did little to resolve the pitched debate between shrimp farmers and traditional fishing communities that has simmered for years. In 1996, the Supreme Court of India banned aquaculture within 1,000 meters (3,300 feet) of Chilika Lake because of environmental concerns, yet enclosures known as “gheries” (which are even visible to satellites…see page 50 of this Powerpoint) remain widespread. You can read more about the ongoing debate about aquaculture in Chilika Lake from Infochange, Economic Times, Radio Netherlands, and the Times of India.

Flickr user Adita Pany took the photograph of flamingos at Nalabana shown above in 2007. The QuickBird satellite caught a glimpse of a stand of flamingos near Nalabana in 2005.

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March 2014 Puzzler

March 24th, 2014 by Adam Voiland

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Every month we offer a puzzling satellite image here on Earth Matters. The March 2014 puzzler is above. Your challenge is to use the comments section to tell us what the image shows, what part of the world we are looking at, when the image was acquired, and why the scene is interesting.

How to answer. Your answer can be a few words or several paragraphs. (Try to keep it shorter than 200 words). You might simply tell us what part of the world an image shows. Or you can dig deeper and explain what satellite and instrument produced the image, what spectral bands were used to create it, or what is compelling about some obscure speck in the far corner of an image. If you think something is interesting or noteworthy, tell us about it.

The prize. We can’t offer prize money, but, we can promise you credit and glory (well, maybe just credit). Roughly one week after a puzzler image appears on this blog, we will post an annotated and captioned version as our Image of the Day. In the credits, we’ll acknowledge the person who was first to correctly ID the image. We’ll also recognize people who offer the most interesting tidbits of information. Please include your preferred name or alias with your comment. If you work for or attend an institution that you want us to recognize, please mention that as well.

Recent winners. If you’ve won the puzzler in the last few months or work in geospatial imaging, please sit on your hands for at least a few days to give others a chance to play.

Releasing Comments. Savvy readers have solved many of our puzzlers after only a few minutes or hours. To give more people a chance to play, we may wait between 24-48 hours before posting the answers we receive in the comment thread.

This is not a mine, military base, salt farm, or solar plant. As explained in our March 2, 2014, Image of the Day, this is a date orchard near the Orange River in Northern Cape, South Africa. Thanks to all of you who weighed in our February 2014 puzzler. Reader JMR was first to identify the location, though many readers (including Paul Tinsley and Samuel Blantz) were on the right track by guessing it was a farm.

As with past puzzlers, we had a good deal of participation on Facebook (600+ comments and counting). While you are welcome to submit answers on Facebook, please be aware that I look at the comments posted to the Earth Matters blog first. I have to sift through significant amounts of spam on Facebook, which means that there is a greater chance I may overlook a correct answer there than on Earth Matters. We’ll be back in a few weeks with the March Puzzler.

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February Puzzler

February 24th, 2014 by Adam Voiland

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Every month we offer a puzzling satellite image here on Earth Matters. The February 2014 puzzler is above. Your challenge is to use the comments section to tell us what the image shows, what part of the world we are looking at, when the image was acquired, and why the scene is interesting.

How to answer. Your answer can be a few words or several paragraphs. (Try to keep it shorter than 200 words). You might simply tell us what part of the world an image shows. Or you can dig deeper and explain what satellite and instrument produced the image, what spectral bands were used to create it, or what is compelling about some obscure speck in the far corner of an image. If you think something is interesting or noteworthy, tell us about it.

The prize. We can’t offer prize money, but, we can promise you credit and glory (well, maybe just credit). Roughly one week after a puzzler image appears on this blog, we will post an annotated and captioned version as our Image of the Day. In the credits, we’ll acknowledge the person who was first to correctly ID the image. We’ll also recognize people who offer the most interesting tidbits of information. Please include your preferred name or alias with your comment. If you work for or attend an institution that you want us to recognize, please mention that as well.

Recent winners. If you’ve won the puzzler in the last few months or work in geospatial imaging, please sit on your hands for at least a few days to give others a chance to play.

Releasing Comments. Savvy readers have solved many of our puzzlers after only a few minutes or hours. To give more people a chance to play, we may wait between 24-48 hours before posting the answers we receive in the comment thread.

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Congratulations to Dillion and Eric J.F. Kelijssen for solving the January Puzzler the fastest.  The answer is Oobloyah Valley on Canada’s Ellesmere Island. The image features four glaciersNukapingwa, Arklio, Perkeo, and Midgetflowing into the valley from the Krieger mountains to the north. At the end of each glacier, all of which are retreating, there are heaps of rock, gravel, and sand known as terminal moraines. As we explained in our Image of the Day on January 18, 2014, the moraines are of interest to ecologists because they offer an ideal natural laboratory for studying how plant species colonize recently exposed terrain.

One team of researchers led by Yokohama National University’s Akira S. Mori focused their search for Arctic plants on the moraine created by Arklio Glacier, the second to the left in the image above. (The Advanced Land Imager acquired this image of the glacier on June 19, 2012.) The moraine, which formed during the Little Ice Age, appears as a lobe-shaped bulge around the end of glacier. The light brown feature south of the moraine is a stream bed. The scientists found two dominant pioneer species living on the rocky, virtually soil-free moraine. The first is Epilobium latifolium, a flowering plant in the evening primrose family known as Dwarf fireweed. The second is Salix arctic, a type of creeping willow.

See Arklio’s terminal moraine and Epilobium latifolium (right) and Salix arctic (left) in the photographs below.

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The snout of Arklio Glacier with its terminal moraine visible at the center of the image.  An earlier study of the area’s vegetation occurred at Moraine D. Image courtesy of Akiro Mori, Yokohama National University.

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The dominant vascular pioneer plants that grow on Arklio Glacier’s moraine: Epilobium latifolium (right) and Salix arctica (left). Image courtesy of Akiro Mori, Yokohama National University.

January Puzzler

January 13th, 2014 by Adam Voiland

January_Puzzler_2014
Every month we offer a puzzling satellite image here on Earth Matters. The January 2014 puzzler is above. Your challenge is to use the comments section to tell us what the image shows, what part of the world we are looking at, when the image was acquired, and why the scene is interesting.

How to answer. Your answer can be a few words or several paragraphs. (Try to keep it shorter than 200 words). You might simply tell us what part of the world an image shows. Or you can dig deeper and explain what satellite and instrument produced the image, what spectral bands were used to create it, or what is compelling about some obscure speck in the far corner of an image. If you think something is interesting or noteworthy, tell us about it.

The prize. We can’t offer prize money, but, we can promise you credit and glory (well, maybe just credit). Roughly one week after a puzzler image appears on this blog, we will post an annotated and captioned version as our Image of the Day. In the credits, we’ll acknowledge the person who was first to correctly ID the image. We’ll also recognize people who offer the most interesting tidbits of information. Please include your preferred name or alias with your comment. If you work for an institution that you want us to recognize, please mention that as well.

Recent winners. If you’ve won the puzzler in the last few months or work in geospatial imaging, please sit on your hands for at least a few days to give others a chance to play.

Releasing Comments. Savvy readers have solved many of our puzzlers after only a few minutes or hours. To give more people a chance to play, we’re going to wait between 24-48 hours before posting the answers we receive in the comment thread.

December Puzzler Answer: The Gulf Stream

December 23rd, 2013 by Adam Voiland

Every month we offer a puzzling satellite image here on Earth Matters. Every month someone seems to figure it out quickly. So in December 2013, we threw down the gauntlet.

For the first time, we put a false-color imagethis swirl of purple and pinkinto play. A week later, we have received many thoughtful responses but no one came up with the answer. The puzzler this month was a swatch of the Gulf Stream as seen in the infrared by the Thermal Infrared Sensor on Landsat 8.

A number of you came pretty close. Kevin Acosta was one of the first to speculate that we were looking at ocean currents, though he guessed it was the Benguela and Agulhas currents south of South Africa. Eric pointed out it was a false-color image of heat, but he was focused on the Great Lakes as opposed to ocean currents.

I was impressed by the sheer diversity of ideas that flowed in. I’ve included a few of the more creative responses below.

“Looks like part of a red algae bloom or ‘red tide’ on the oceans surface. Can be very beautiful, but can also be deadly when seafood gathered from an algae site is consumed.”  M. Lowe, Earth Matters

“Looking at the gas cloud produced after an eruption using thermal imagery probably underwater hence the blue at top of picture. Recent off Japanese coast.”  Duane Elliott, Facebook.

“Looks similar to nickel tailings in Sudbury, Ontario, much like the images shot by Edward Burtynsky. Improper chemical waste is an on-going environmental issue, which definitely needs more exposure.” Brittney Hopson, Facebook.

“Enhanced satellite imagery of a desert area, showing buried aquifer formations which are potential water supplies, GPR perhaps.”  John Munsey, Facebook.

“To me it looks like it is hot lava with the gases swirling with smoke…Iceland…or Hawaii?  Alison Renee Heller, Facebook.

Thanks to all of you for puzzling away with us in 2013. We had a lot of fun looking at satellite imagery, and we hope you did as well. (Missed one of our 2013 puzzlers? We’ve tagged them here.) Looking forward, the puzzler will be back and even more puzzling in 2014. We’ll see you then.

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December Puzzler

December 16th, 2013 by Mike Carlowicz

puzzler_december2013

Every month we offer a puzzling satellite image here on Earth Matters. Every month someone seems to figure it out quickly. We are feeling like it is time to throw down some gauntlets.

The December 2013 puzzler is above. Your challenge is to use the comments section to tell us what the image shows, what part of the world we are looking at, when the image was acquired, and why the scene is interesting.

How to answer. Your answer can be a few words or several paragraphs. (Try to keep it shorter than 200 words). You might simply tell us what part of the world an image shows. Or you can dig deeper and explain what satellite and instrument produced the image, what spectral bands were used to create it, or what is compelling about some obscure speck in the far corner of an image. If you think something is interesting or noteworthy, tell us about it.

The prize. We can’t offer prize money, but, we can promise you credit and glory (well, maybe just credit). Roughly one week after a puzzler image appears on this blog, we will post an annotated and captioned version as our Image of the Day. In the credits, we’ll acknowledge the person who was first to correctly ID the image. We’ll also recognize people who offer the most interesting tidbits of information. Please include your preferred name or alias with your comment. If you work for an institution that you want us to recognize, please mention that as well.

Recent winners. If you’ve won the puzzler in the last few months or work in geospatial imaging, please sit on your hands for at least a few days to give others a chance to play.

Releasing Comments. Savvy readers have solved many of our puzzlers after only a few minutes or hours. To give more people a chance to play, we’re going to wait between 24-48 hours before posting the answers we receive in the comment thread.