NASA Earth
yesterday at 19:15. Facebook
Blog Post: Green Ice and Snow

You never know where phytoplankton will turn up next. From space, we regularly see colorful blooms of them swirling in the world’s oceans. Inland basins and waterways support them too, such as Florida’s Lake Okeechobee, Washington’s Hood Canal, and North America’s Great Lakes.

Even the waters off the coast of Antarctica can sustain blooms. We recently showed a...
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NASA Earth
yesterday at 16:30. Facebook
November’s magnitude 7.8 Kaikoura earthquake in New Zealand was so unusual, it may change how scientists think about earthquake hazards. [ Go.nasa.gov Link ]
NASA Earth
03/23/2017 at 22:21. Facebook
A NASA-led science team spent six weeks in January and February studying Hawaii's volcanoes and coral reefs using the agency's ER-2 aircraft. The mission, called Hyperspectral InfraRed Imager (HyspIRI), focused on observing coral reef health and volcano emissions and eruptions. Flying at 65,000 feet (19,800 meters), above 95 percent of Earth’s atmosphere, the ER-2 can closely replicate the...
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NASA Earth
03/23/2017 at 16:34. Facebook
After a successful deployment in Alaska, NASA Operation IceBridge is back in Thule, Greenland. Bonus? Seeing Northern lights over the transit flight. It’s a busy time in Greenland. NASA’s Oceans Melting Greenland airborne mission is also at work there studying how the ocean and ice interact. [ Airbornescience.nasa.gov Link ]
NASA Earth
03/23/2017 at 11:04. Facebook
The Rise and Fall of SO2 Over Aruba

When the oil refinery in San Nicolas, Aruba, shut its doors in 2009, a silent change took place. Above the azure seas and chimney stacks, the air began to clear as sulfur dioxide (SO2) emissions plummeted.

Invisible to the human eye, SO2 can disrupt human breathing and harm the environment when it combines with water vapor to make acid rain. It tends to...
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The Rise and Fall of SO Over Aruba : Image of the Day

earthobservatory.nasa.gov
NASA Earth
03/22/2017 at 21:29. Facebook
One of Earth's few exposed lava lakes is changing, and artificial intelligence helped NASA understand how.

In January, a fissure opened at the top of Ethiopia's Erta Ale volcano – one of the few in the world with an active lava lake in its caldera. Volcanologists sent out requests for NASA's Earth Observing 1 (EO-1) spacecraft to image the eruption, which was big enough to begin reshaping...
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How A.I. Captured a Volcano's Changing Lava Lake

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NASA Earth
03/22/2017 at 17:21. Facebook
Arctic sea ice reached a new record low maximum extent earlier this month, continuing a decades-long trend of declining sea ice coverage at the top of the planet. Meanwhile, Antarctic sea ice also reached a record low minimum extent, despite a recent trend of slightly increasing sea ice around Antarctica.

On February 13, global sea ice levels reached their smallest combined extent since...
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NASA Earth
03/21/2017 at 18:41. Facebook
NASA Earth
03/21/2017 at 15:00. Facebook
Under the Surface of El Niño

The ocean is not uniform. Temperature, salinity, and other characteristics vary in three dimensions, from north to south, east to west, and from the surface to the depths. With its own forms of underwater weather, the ocean has fronts and circulation patterns that move heat and nutrients around its basins. Changes near the surface often start with changes in the...
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NASA Earth
03/20/2017 at 22:54. Facebook
The earliest satellites of the Space Age were small. Sputnik, for instance, weighed just 184.3 lbs. America’s first satellite, Explorer 1, was even smaller at only about 30 lbs. Over time, satellites grew to accommodate more sensors with greater capabilities, but thanks to miniaturization and new technology capabilities, small is back in vogue.

NASA is one of many government agencies,...
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NASA Earth
03/20/2017 at 19:00. Facebook
Atmospheric scientist Róisín Commane of Harvard University sent back a video postcard from Ascension Island and the Azores Islands, the seventh and eighth legs of the Atmospheric Tomography, or ATom #EarthExpedition. Flying over the Atlantic Ocean, the science team saw evidence of fires in Africa and dust from the Sahara.

The ATom mission aboard NASA’s DC-8 aircraft and flying laboratory is...
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NASA Earth
03/20/2017 at 17:03. Facebook
NASA Earth
03/20/2017 at 16:35. Facebook
Tune in LIVE at 1 pm ET to hear all about the #FirstDayofSpring and the upcoming total solar eclipse!

[ Facebook.com Link ]
NASA Earth
03/20/2017 at 15:00. Facebook
Grand Turk Island

An astronaut aboard the International Space Station took this photograph of Grand Turk Island, situated on the southern end of the Bahamas archipelago in the Turks and Caicos Islands. Grand Turk Island is just 10 kilometers (6 miles) long, and much of the island is occupied by Cockburn Town (population about 5,000), the capital of Turks and Caicos.

Much of the land surface...
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NASA Earth
03/20/2017 at 12:54. Facebook
Seeing Equinoxes and Solstices from Space

One of the most frequently misunderstood concepts in science is the reason for Earth’s seasons. As we experience the March equinox today we thought we’d offer a space-based view of what’s going on.

Around 6 a.m. local time each day, the Sun, Earth, and any geosynchronous satellite form a right angle, affording a nadir (straight down) view of the...
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NASA Earth
03/19/2017 at 17:08. Facebook
As planned since the start of the mission, one of our pathfinder Earth satellites will be powered off on March 30. During its 17 years of service, the Earth Observing (EO-1) satellite tested cutting-edge technologies that were incorporated into subsequent missions. Find out more: [ Go.nasa.gov Link ]
NASA Earth
03/19/2017 at 15:00. Facebook
Where Trucks Drive on the River

If your vehicle weighs less than 22,000 pounds, you can drive the frozen river out to Reindeer Station. Bitterly cold and 194 kilometers (120 miles) long, the ice road runs between the remote outposts of Inuvik and Tuktoyaktuk.

This image, acquired on November 7, 2016, by the Operational Land Imager (OLI) on Landsat 8, shows a portion of the Mackenzie River...
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NASA Earth
03/18/2017 at 21:09. Facebook
NASA Earth
03/18/2017 at 18:00. Facebook
In March, the Arctic sea ice pack is supposed to reach its greatest extent — but this year it’s far below average, off by an area about the size of Texas and New Mexico combined.
Satellite observations currently reveal how much of the ocean surface is covered by ice, but there is another critical measurement to make. Researchers are already anticipating using NASA’s ICESat-2, set to launch in...
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NASA Earth
03/18/2017 at 15:01. Facebook
Ice on Puma Yumco

Several hundred lakes dot the expansive Tibetan Plateau. With the average plateau elevation exceeding 4,500 meters (14,800 feet) above sea level, its lakes are among the highest in the world.

Puma Yumco in Lhozhag County is one of the larger lakes in southern Tibet. A small village along the eastern edge of the lake—Tuiwa—is reportedly one of the highest administered...
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