Good News:End of the Earth Postponed

an image of mayan calendar on cosumel island' ...

an image of mayan calendar on cosumel island' Mexico (Photo credit: Wikipedia)

It’s a good news/bad news situation for believers in the 2012 Mayan apocalypse. The good news is that the Mayan “Long Count” calendar may not end on Dec. 21, 2012 (and, by extension, the world may not end along with it). The bad news for prophecy believers? If the calendar doesn’t end in December 2012, no one knows when it actually will — or if it has already.

A chapter in the new textbook “Calendars and Years II: Astronomy and Time in the Ancient and Medieval World” (Oxbow Books, 2010), argues that the accepted conversions of dates from Mayan to the modern calendar may be off by as much as 50 or 100 years. That would throw the supposed and overhyped 2012 apocalypse off by decades and cast into doubt the dates of historical Mayan events. (The doomsday worries are based on the fact that the Mayan calendar ends in 2012, much as our year ends on Dec. 31.)

The Mayan calendar was converted to  Gregorian calendar using a calculation called the GMT constant, named for the last initials of three early Mayanist researchers. Much of the work emphasized dates recovered from colonial documents that were written in the Mayan language in the Latin alphabet, according to the chapter’s author, Gerardo Aldana, University of California, Santa Barbara professor of Chicana and Chicano Studies.

Later, the GMT constant was bolstered by American linguist and anthropologist Floyd Lounsbury, who used data in the Dresden Codex Venus Table, a Mayan calendar and almanac that charts dates relative to the movements of Venus.

Source:Livescience

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Wind to play a major role in India’s electricity future

wind power

A new study, conducted by Lawrence Berkeley National Laboratory, US, revealed that the potential for on-shore wind energy deployment is far higher than the official estimates (about 20 times and up to 30 times greater than the current government estimate of 102 gigawatts) in India.

The Berkeley Lab study undertook a systematic assessment of the availability of land using GIS data on topography and land use and found a significantly higher availability of land that can potentially be used for wind power development, which is the primary reason for the higher potential estimates.

The new  study found the total techno-economic wind potential to range from 2,006 GW for 80-meter hub heights (an indication of how high the wind turbine stands above the ground) to 3,121 GW for 120-meter hub heights.

According to Amol Phadke,lead author of report” The cost of wind power is now comparable to that from imported coal and natural gas-based plants, and wind can play a significant role in cost effectively addressing energy security and environmental concerns”.

Links and Sources:

Geospatial

Science Codex

Posted in Alternative Energy, GIS, India, Winds | 2 Comments

Cygnus Loop Nebula:Image from NASA

Wispy tendrils of hot dust and gas glow brightly in this ultraviolet image of the Cygnus Loop Nebula, taken by NASA’s Galaxy Evolution Explorer. The nebula lies about 1,500 light-years away, and is a supernova remnant, left over from a massive stellar explosion that occurred 5,000-8,000 years ago. The Cygnus Loop extends more than three times the size of the full moon in the night sky, and is tucked next to one of the ‘swan’s wings’ in the constellation of Cygnus.
The filaments of gas and dust visible here in ultraviolet light were heated by the shockwave from the supernova, which is still spreading outward from the original explosion. The original supernova would have been bright enough to be seen clearly from Earth with the naked eye.

Source:NASA Website

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Is Extreme Weather Linked to Global Warming?

The past decade has been one of unprecedented weather extremes. Scientists of the Potsdam Institute for Climate Impact Research (PIK) in Germany argue that the high incidence of extremes is not merely accidental. From the many single events a pattern emerges. At least for extreme rainfall and heat waves the link with human-caused global warming is clear, the scientists show in a new analysis of scientific evidence in the journal Nature Climate Change. Less clear is the link between warming and storms, despite the observed increase in the intensity of hurricanes.

read here

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