Skip to main content

Record levels of solar ultraviolet measured in South America
















by Staff Writers
Mountain View CA (SPX) Jul 11, 2014


File image.






A team of researchers in the U.S. and Germany has measured the highest level of ultraviolet radiation ever recorded on the Earth's surface. The extraordinary UV fluxes, observed in the Bolivian Andes only 1,500 miles from the equator, are far above those normally considered to be harmful to both terrestrial and aquatic life. The results are being published in the open-access journal Frontiers in Environmental Science.





"These record-setting levels were not measured in Antarctica, where ozone holes have been a recurring problem for decades,"
says team leader Nathalie A. Cabrol of the SETI Institute and NASA Ames Research Center. "This is in the tropics, in an area where there are small towns and villages."






The measurements were made in the southern hemisphere summer of 2003 and 2004, using instruments developed for the European Light Dosimeter Network (Eldonet). 






They were undertaken as Cabrol's team was investigating high altitude Andean lakes as part of an astrobiology study of Mars-like environments.






Dosimeters were deployed on the summit of the towering Licancabur volcano (altitude: 5,917 meters) and at nearby Laguna Blanca (altitude 4,340 meters). 






The combination of a midday sun near the zenith, as well as the high elevation of these sites, produces higher irradiance levels because of naturally low ozone in such locations. But these intensities of short-wavelength UV-B radiation (280 - 315 nm) are unprecedented.





"A UV index of 11 is considered extreme, and has reached up to 26 in nearby locations in recent years," notes Cabrol. "But on December 29, 2003, we measured an index of 43. If you're at a beach in the U.S., you might experience an index of 8 or 9 during the summer, intense enough to warrant protection. You simply do not want to be outside when the index reaches 30 or 40."








The intense radiation coincided with other circumstances that may have increased the UV flux, including ozone depletion by increased aerosols from both seasonal storms and fires in the area. In addition, a large solar flare occurred just two weeks before the highest UV fluxes were registered. 






Ultraviolet spikes continued to occur - albeit at lower intensity - throughout the period of solar instability, and stopped thereafter.








While the evidence linking the solar event to the record-breaking radiation is only circumstantial, particles from such flares are known to affect atmospheric chemistry and may have increased ozone depletion.










"While these events are not directly tied to climate change, they are sentinels of what could occur if ozone thins globally,"
Cabrol says.




"The thinner and more unstable the ozone, the more prone we will be to this kind of event."








High UV-B exposure negatively affects the entire biosphere, not just humans. It damages DNA, affects photosynthesis, and decreases the viability of eggs and larvae. For these reasons, it is important to keep a close watch on UV flux levels.








"While this unsettling record might be the result of a 'perfect storm' of events, it could happen again," says Cabrol, "because the factors that caused it are not rare. What we need is more monitoring of the ozone changes in these areas. These fluxes, which are comparable to those of early Mars, are occurring in a populated area."








David Black, president and CEO of the SETI Institute, notes that "this is an excellent example of how astrobiology - which includes understanding the atmospheres of other planets - is germane to contemporary concerns here on Earth."













http://www.solardaily.com/reports/Record_levels_of_solar_ultraviolet_measured_in_South_America_999.html

Popular posts from this blog

MEET MELANIA TRUMP: The 5'11" supermodel married to Donald Trump

Aly Weisman, INSIDER

Sep. 2, 2015, 3:28 PM 











Chip Somodevilla/Getty Images







While Donald Trump loves to be the center of media attention, his third and current wife, Melania Trump, is a bit more camera shy.










The Slovenian-born model keeps a lower profile than her husband, doing philanthropy work, raising their son, working on a jewelry collection with QVC, and creating a $150-an-ounce caviar moisturizer.




With Trump on the campaign trail, Melania has stoically stood by his side.




But who exactly is Melania and where did she come from? Learn about Trump's other half here ...





Melania Knauss was born April 26, 1970, in Slovenia.




Wikimedia/Getty







The 5'11" brunette began her modeling career at 16, and signed with a modeling agency in Milan at 18.



Chris Hondros/Newsmakers via Getty









She took a break from modeling to get her degree in design and architecture at the University of Ljubljana in Slovenia.








Wikimedia/Getty

Source: MelaniaTrump.com









But after graduating, her modeling career took off and Me…

THE MOST SOUGHT AFTER MANGOES IN THE WORLD ....

While "Flavor" is very subjective, and each country that grows mangoes is very nationalistic, these are the mango varieties that are the most sought after around the world because of sweetnesss (Brix) and demand.

The Chaunsa has a Brix rating in the 22 degree level which is unheard of!
Carabao claims to be the sweetest mango in the world and was able to register this in the Guiness book of world records.
Perhaps it is time for a GLOBAL taste test ???





In alphabetical order by Country....










India




Alphonso





Alphonso (mango)
From Wikipedia, the free encyclopedia








Alphonso (हापुस Haapoos in Marathi, હાફુસ in Gujarati, ಆಪೂಸ್ Aapoos in Kannada) is a mango cultivar that is considered by many[who?] to be one of the best in terms of sweetness, richness and flavor. 


It has considerable shelf life of a week after it is ripe making it exportable. 

It is also one of the most expensive kinds of mango and is grown mainly in Kokan region of western India.

 It is in season April through May and the fruit wei…

INDIA 2016 : Mango production in state likely to take a hit this year

TNN | May 22, 2016, 12.32 PM IST






Mangaluru: Vagaries of nature is expected to take a toll on the production of King of Fruits - Mango - in Karnataka this year. A combination of failure of pre-monsoon showers at the flowering and growth stage and spike in temperature in mango growing belt of the state is expected to limit the total production of mango to an estimated 12 lakh tonnes in the current season as against 14 lakh tonnes in the last calendar year.



However, the good news for fruit lovers is that this could see price of mangoes across varieties decrease marginally by 2-3%. This is mainly on account of 'import' of the fruit from other mango-growing states in India, said M Kamalakshi Rajanna, chairperson, Karnataka State Mango Development and Marketing Corporation Ltd.




Karnataka is the third largest mango-growing state in India after Uttar Pradesh and Maharashtra.



Inaugurating a two-day Vasanthotsava organized by Shivarama Karantha Pilikula Nisargadhama and the Corporation at P…