Sun's corona

http://www.google.co.uk/url?sa=t&rct=j&q=&esrc ="s&source=web&cd=3&ved=0CDcQFjAC&url=http%3A%2F%2Fwww.sciencedaily.com%2Freleases%2F2014%2F08%2F140801171124.htm&ei=3KogVOX5LOng7QbcxoDQCw&usg=AFQjCNFitz86jaA4XCZYjnia7F7Tr_X0fQ&sig2=0srEQ6mHdFkk5yqDk8BCbQ" recent article.

So the first article is a British team at Northumbria University saying in 2013 that the reason the corona is so hot is "magnetohydrodynamic (MHD) waves that distribute the energy generated below the star's surface to the outer layers of the Sun's atmosphere".

The second article is from 2014 and concerns a US team saying "The new observations of the small-scale extremely hot temperatures are consistent with only one current theory: something called nanoflares".

So has the nano flares theory trumped MHD? Are the two theories related? Or completely different? Have the Americans not heard of Northumbria? It looks as this the Sun's magnetic field is responsible in some way but that's about all I can figure out!

I put up both articles as they show that we could be near to an answer. Also to see what members thought.