While the month of March saw colder-than-average temperatures across a wide-swath of the northern hemisphere—including the U.S., southern Canada, Europe, and northern Asia—globally, it was the tenth warmest March on record in the last 134 years, putting it in the top 7 percent.
Temperatures last month were 0.58 degrees Celsius (1.04 degrees Fahrenheit) above the 20th Century average worldwide, according to new data from the National Oceanic and Atmospheric Administration (NOAA). The month was especially warm for Greenland, Africa, central Asia, and Australia, while the U.K. had its second coldest March on record.
According to NASA, last month saw a shockingly negative Arctic Oscillation (AO) index (-5.6) which allows cold Arctic air to move south (hence the low temperatures in many populated areas) and warmer air to move north.
So far, 2013 is as the eighth warmest year on record when one compares the period of January-March to other years. However, that could change considerably depending on the next nine months.
The earth’s average temperature has jumped by approximately 0.8 degrees Celsius (1.4 degrees Fahrenheit) over the last century due to burning fossil fuels, deforestation, and other land-use changes that emit greenhouse gases. Global warming has already led to rising sea levels, melting Arctic sea ice, worse droughts and floods, and an acidifying ocean. Recent research has also suggested that climate change may be impacting the jet stream.
(04/21/2013) From 1971 to 2000, the world’s land areas were the warmest they have been in at least 1,400 years, according to a new study in Nature Geoscience. The massive new study, involving 80 researchers from around the world with the Past Global Changes (PAGES) group, is the first to look at continental temperature changes over two thousand years, providing insights into regional climatic changes from the Roman Empire to the modern day. According to the data, Earth’s land masses were generally cooling until anthropogenic climate change reversed the long-term pattern in the late-19th Century.
(04/17/2013) Four young explorers including American actor Ezra Miller have planted a flag on the seabed at the north pole and demanded the region is declared a global sanctuary. The expedition, organized by Greenpeace, saw the flag lowered in a time capsule that contained the signatures of nearly 3 million people who are calling for a ban on exploitation in the region.
(04/10/2013) Climate change will lead to bumpier flights caused by increased mid-air turbulence, according to an analysis by scientists of the impact of global warming on weather systems over the next four decades. The increasing air turbulence results from the impact of climate change on the jet streams, the fast, mile-wide winds that whistle round the planet at the same altitude as airliners. The shifting of the jet stream over Europe has also been blamed for the UK’s wash-out summer in 2012 and frozen spring this year.
(04/08/2013) In less than 40 years, drinking wine could have a major toll on the environment and wildlife, according to a new study in the Proceedings of the National Academy of Sciences (PNAS). The study finds that climate change will likely force many vineyards to move either north or to higher altitudes, leading to habitat loss, biodiversity declines, and increased pressure for freshwater. Some famous wine-growing areas could be lost, including in the Mediterranean, while development of new wine areas—such as those in the Rocky Mountains and northern Europe—could lead to what the the scientists describe as “conservation conflicts.”
(04/03/2013) A new poll by the Center for Climate Change Communication (4C) at George Mason University finds that a majority of U.S. citizens who identify as Republicans or Republican-leaning independents want the government to do more to tackles climate change. Sixty-two percent of those polled said that the U.S. government “absolutely should” or “probably should” takes steps to address climate change. This goes against the views of many Republican congressmen—as well as the party platform—who largely oppose action on climate change.
(04/01/2013) Warming about twice as fast as the rest of the world, the Arctic is already undergoing massive upheavals from climate change: summer sea ice is thinning and vanishing, land based ice sheets are melting, and sea levels are rising. Now a new study in Nature Climate Change predicts that vegetation cover in the Arctic could expand by over 50 percent by 2050. Although increased vegetation would sequester additional carbon, this would be more-than-offset by the loss of the albedo effect, whereby sunlight bounces off white (snow and ice covered) parts of the Earth.
(03/28/2013) Critics of climate change often claim that warming has stopped since the late 1990s. While this is categorically false (the last decade was the warmest on record and 2005 and 2010 are generally considered tied for the warmest year), scientists do admit that warming hasn’t occurred over land as rapidly as predicted in the last ten years, especially given continually rising greenhouse gas emissions. But a recent study in Geophysical Research Letters has found this so-called missing heat: 700 meters below the surface of the ocean.
(03/26/2013) Climate scientists have linked the massive snowstorms and bitter spring weather now being experienced across Britain and large parts of Europe and North America to the dramatic loss of Arctic sea ice.