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A new expedition to explore the Mayan complex at Chichen Itza has been launched, that will include studying the 1,000-year-old Temple of Kukulkan, and the landscape’s numerous sinkholes. The expedition’s aim is an attempt to uncover the secrets of a mysterious underworld that is supposed to exist there according to Mayan oral history. This is the first comprehensive exploration of the site in roughly half a century.
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A recently-published study from NASA has revealed that glaciers in West Antarctica’s Marguerite Bay have increased their flow rate, speeding up by up to 25 percent, an event that has accelerated ice loss in the region from 2 to 3 meters (7 to 10 feet) per year to 10 meters (33 feet). Prior to 2008, the flow rates of the four affected glaciers had been stable for two decades, but a major calving event in 1989 left the bay with little to no ice shelf, leaving them with only grounded ice on dry land — a precarious position for its potential to affect sea level rise.
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A new study published in the journal Nature Geoscience has found that the goal of the Paris climate accord of keeping global warming levels below 2ºC (3.6ºF) may be easier to achieve than originally anticipated, allowing humanity a much larger carbon budget to work with. One of the major reasons certain parties have rejected the Paris Accord was the perceived difficulty in attaining that goal, but this new finding, if correct, should help encourage more action in regards to what we need to do to curtail global warming.
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Ordinarily, the bright, white surface of glacial ice found in ice sheets such as the ones that cover Greenland and Antarctica serve to function as reflectors that bounce a certain amount of solar radiation back into space — this effect also helps prevent the ice from being directly warmed too much by the sun. The effect of the ice’s reflectiveness, or albedo, can be compromised by changes in its color, for instance by soot being deposited on the surface from large wildfires ravaging a different part of the globe. The darkening of the ice causes it to absorb more sunlight, and in turn this increases the temperature of the ice, hastening its rate of melt. Now, a new factor has been identified that can darken the albedo of Greenland’s ice: the spread of simple algae.
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