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Benjamin McKeown

dune - National Geographic Society - 0 views

www.nationalgeographic.org/...dune

dunes

shared by Benjamin McKeown on 04 Apr 18 - No Cached
  • Benjamin McKeown on 04 Apr 18
     
    "USGS: Deserts-Types of Dunes"
Benjamin McKeown

In Peru's Deserts, Melting Glaciers Are a Godsend (Until They're Gone) - The New York T... - 0 views

www.nytimes.com/...peru-climate-change.html

climate change consequences peru

shared by Benjamin McKeown on 27 Nov 17 - No Cached
  • has shrunk by 40 percent since 1970 and
  • . It is currently receding by about 30 feet a year, scientists say.
  • The retreat of the icecap has exposed tracts of heavy metals, like lead and cadmium, that were locked under the glaciers for thousands of years, scientists say. They are now leaking into the ground water supply, turning entire streams red, killing livestock and crops, and making the water undrinkable.
  • ...16 more annotations...
  • pests that now thrive in the warmer air.
  • worm that became the scourge for him and neighboring farmers. It suddenly started devouring their crops in the early 2000s.
  • last year, came the rats.
  • the breaking point for his cotton crops came when red ants ate away the buds.
  • he has decided to plant sugar cane instead and move some of his production to higher altitudes where it is colder.
  • The idea’s supporters promised profits through exports to markets in North America, Asia and Europe, where the fruit seasons were reversed.
  • hey are shipped to China, where they are prized. Credit Tomas Munita for The New York Times
  • All told, more than 100,000 acres of desert were brought into cultivation.
  • With enough water and fertilizer, asparagus could be grown directly in the sand — and at yields per acre far higher than in the United States because Peru has no cold season and more days of sun.
  • A reservoir was created out of a dune. More than 8,000 tons of produce grows here every year.
  • The temperature at the site of the glaciers rose 0.5 to 0.8 degrees Celsius from the 1970s to the early 2000s, causing the glaciers of the Cordillera Blanca to double the pace of their retreat in that period
  • It was the start of a wave of migration from the mountainside to the coast set off by the arrival of the water.
  • 14,000 feet above sea level.
  • “In years to come, we will be fighting over water,” said Mr. Gómez.
  • Meanwhile, planners here continue to push for more irrigation.
  • “Because of this water, our children have been able to go to university,” he said. “But if there is no water from the Santa River, that all changes.”
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