Matthes in The NASA Earth Observatory notes three particularly cold intervals: one beginning about , another about , and the last in , all separated by intervals of slight warming. At most, there was modest cooling of the Northern Hemisphere during the period. Several causes have been proposed: cyclical lows in solar radiation , heightened volcanic activity , changes in the ocean circulation , variations in Earth's orbit and axial tilt orbital forcing , inherent variability in global climate, and decreases in the human population for example from the Black Death and the epidemics emerging in the Americas upon European contact . Evidence from mountain glaciers does suggest increased glaciation in a number of widely spread regions outside Europe prior to the twentieth century, including Alaska , New Zealand and Patagonia. However, the timing of maximum glacial advances in these regions differs considerably, suggesting that they may represent largely independent regional climate changes , not a globally-synchronous increased glaciation.
Meryl Davis, Charlie White Win First-Ever Gold for Team USA in Ice Dancing at Sochi Olympics
See All the Photos of Meryl Davis and Fedor Andreev's Wedding in Provence, France
By Ryan Smith for MailOnline. Gymnast Amy Tinkler has revealed that her new stint on Dancing On Ice has helped restore her body confidence, after years of being made to feel 'fat' in her sport. The Olympic bronze medallist, 21, has stepped in as an 11th hour replacement for Denise Van Outen, who was forced to quit the show after dislocating her shoulder. And while other celebrities have publicly expressed their fears about taking to the ice for the ITV show, Amy says it's a welcome change from the pressures of the gym. Confidence: Gymnast Amy Tinkler has revealed that her new stint on Dancing On Ice has helped restore her body confidence, after years of being made to feel 'fat' in her sport.
Thanks to Connelly, the poster for the John Hughes-penned movie has been turning heads for 30 years… starting with the head of its leading man, Frank Whaley. Vanessa Williams discusses rebounding after Miss America scandal, finding success in Hollywood and mentoring the next generation of black artists. Universal Studios Hollywood will reopen on Friday, April Tickets go on sale Thursday, April 8, the park announced today. There will be a special park preview for annual and season pass members starting on Thursday, April
The professional skater, 37, has been forced to bow out after injuring his hand 'whilst putting on a sock'. Another one bites the dust! Faye will remain in the competition but will now be partnered with professional skater Matt Evers, who was previously partnered with Denise Van Outen.