Northern hemisphere snow cover, Arctic sea ice extent well below average for the month
Year-to-date temperatures have been above average across most of the planet. GRAPHIC COURTESY NATIONAL CLIMATIC DATA CENTER.
By Summit Voice
SUMMIT COUNTY — Planet Earth stayed warm in October, with combined average land and ocean-surface temperatures coming in at 1.04 degrees above the 20th century average, a reading that made it the 10th-warmest October on record, and the second-warmest for land surface temperatures alone, according to the global summary issued this week by the National Climatic Data Center.
On the whole, October 2011 was much warmer than normal compared with previous Octobers. On average, land areas across the Northern Hemisphere — where the majority of the Earth’s land mass is located — were the warmest on record for the month, at 2.32 degrees above the 20th century average.
Despite early snowfall in some parts of the Rockies and in the Northeast, northern Hemisphere snow cover extent during October was below average, ranking as the 15th smallest October snow cover extent in the 44-year period of record. The North America and Eurasian land areas both had below-average snow cover during the month.
And while global warming deniers were busy trumpeting Arctic sea ice growth, the fact is that the average Arctic sea ice extent in October was 23.5 percent below average for the month, ranking as the second smallest October extent since satellite records began in 1979. The extent was 2.19 million square kilometers (846,000 square miles) below average and 330,000 square kilometers (127,000 square miles) above the record low October extent set in 2007. (more…)
Filed under: climate and weather, global warming, La Niña, Snow and weather | Tagged: climate change, Environment, global warming, National Climatic Data Center, October 2011 global temperatures, State of the Climate | 3 Comments »