Daily Overview：從太空的視角看地球，色彩控都會著迷的視覺享受

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Here’s another favorite Overview from 2017 - a massive bloom of cyanobacteria in the Baltic Sea. In August 2015, a bloom spanning more than 100 square kilometers covered these waters. Cyanobacteria are a type of marine bacteria that capture and store solar energy through photosynthesis. While some are toxic to humans and animals, large blooms can cause an oxygen-depleted dead zone where other organisms cannot survive. Scientists believe that blooms are more likely to form in the presence agricultural and industrial run-off or from cruise ships that provide excessive nutrients for the bacteria through the dumping of sewage. - @benjaminrgrant /// Source imagery: @NASA

A post shared by Daily Overview (@dailyoverview) on Dec 23, 2017 at 11:22am PST

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Tailings are the waste and by-products generated by mining operations. The tailings seen here were pumped into the Gribbens Basin, next to the Empire and Tilden Iron Ore Mines in Negaunee, Michigan, USA. Once the materials are pumped into the pond, they are mixed with water to create a sloppy form of mud known as slurry. The slurry is then pumped through magnetic separation chambers to extract usable ore and increase the mine’s total output. For a sense of scale, this Overview shows approximately 2.5 square kilometers (1 square mile) of the basin. /// Created by: @benjaminrgrant, source imagery: @digitalglobe

A post shared by Daily Overview (@dailyoverview) on May 25, 2017 at 9:03am PDT

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This week I’ll be curating a selection of Overviews for the Climate Museum (@climatemuseum), a new initiative to build a museum space and dedicated hub for climate education and engagement in New York City. For our first post, we shared the Gemasolar Thermosolar Plant in Seville, Spain. The facility uses 2,650 heliostat mirrors to collect and focus the sun’s thermal energy to heat molten salt flowing through a 460-foot tall central tower. The molten salt then circulates from the tower to a storage tank where it is used to produce steam and generate electricity. In total, the facility displaces approximately 30,000 tons of CO2 emissions every year. Be sure to follow along with our other posts this week @climatemuseum. /// Created by @benjaminrgrant, source imagery: @digitalglobe

A post shared by Daily Overview (@dailyoverview) on Feb 7, 2017 at 8:42am PST

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This Overview captures the tightly gridded streets of Nezahualcóyotl, a municipality of Mexico City. With a population of more than one million people, the area is home to many of the capital’s citizens who have migrated there from other parts of the country. /// Created by @benjaminrgrant, source imagery: @digitalglobe

A post shared by Daily Overview (@dailyoverview) on Oct 18, 2016 at 9:05am PDT

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Check out this incredible drone shot of a road slicing through the forest near Pysht, Washington, USA. This one was captured and shared with us by @monascherie

A post shared by Daily Overview (@dailyoverview) on Jun 28, 2016 at 6:41am PDT

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A newly formed crack in the Larsen Ice Shelf in Antarctica extends as far as the eye can see. The fracture is currently measured at 100 feet wide and over 100 miles long, growing more than 50 miles alone since 2011. If this chunk of ice breaks away, roughly 2,000 square miles will be lost - that’s roughly the size of the state of Delaware. The break is the latest example of major ice loss in the fast warming Antarctic Peninsula and could lead to a rise in global sea levels by roughly four inches (10 centimeters). /// Post by @txdougherty, photo taken from airplane by John Sonntag for @NASA

A post shared by Daily Overview (@dailyoverview) on Jan 7, 2017 at 7:49am PST

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We can’t get enough of these fall drone shots. Check out this stunning view of the colorful foliage in northern New Jersey, USA. Tag a friend you’d like to travel here with and have a great start to the week! /// Captured by our friend @zekedrone

A post shared by Daily Overview (@dailyoverview) on Nov 6, 2017 at 12:38pm PST

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Using ultraviolet cameras, NASA captured this incredible overview of the sun in the midst of solar eruptions over a three day period in 2013. The composite photo was created using three wavelengths of light that have been colorized in red, green, and blue to show the dynamics of each eruption. - @benjaminrgrant

A post shared by Daily Overview (@dailyoverview) on Aug 5, 2017 at 7:11am PDT

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Agricultural fields line the shores of the Itaipu Reservoir—a body of water that forms the border between Brazil and Paraguay. The area’s tropical climate makes it an ideal place to grow sugarcane, coffee, tea, and cotton. Source imagery: @digitalglobe

A post shared by Daily Overview (@dailyoverview) on Apr 4, 2016 at 12:14pm PDT

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Pivot irrigation fields cover the landscape north of Copeland, Kansas, USA. Powered by electric motors, lines of sprinklers rotate 360 degrees to evenly water crops. Source imagery: @digitalglobe

A post shared by Daily Overview (@dailyoverview) on Mar 29, 2016 at 10:42am PDT

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Zoom in and check out this turbine interchange connecting SR 9A and SR 202 in Jacksonville, Florida, USA. Also known as a whirlpool interchange, this structure consists of left-turning ramps sweeping around a center interchange, thereby creating a spiral pattern of right-hand traffic. /// Source imagery: @digitalglobe

A post shared by Daily Overview (@dailyoverview) on Sep 1, 2016 at 6:49am PDT