James E. Hansen wiped sweat from his brow. Outside it was a record-high 98 degrees on June 23, 1988, as the NASA scientist testified before the Senate Committee on Energy and Natural Resources during a prolonged heat wave, which he decided to cast as a climate event of cosmic significance. He expressed to the senators his “high degree of confidence” in “a cause-and-effect relationship between the greenhouse effect and observed warming.” With that testimony and an accompanying paper in the Journal of Geophysical Research,... … [Read more...] about Thirty Years On, How Well Do Global Warming Predictions Stand Up?
Nasa global warming
Doyle Rice USA TODAY Published 6:20 p.m. UTC Jun 13, 2018 Global warming has caused over 3 trillion tons of ice to melt from Antarctica in the past quarter-century and tripled ice loss there in the past decade, a new study finds. The total is equivalent to over 4 quintrillion gallons of water added to the world's oceans, making Antarctica's melting ice sheets one of the largest contributors to rising sea levels. That amount of water is enough to fill over a billion swimming pools and cover Texas to a depth of nearly 13 feet. “Even though Antarctica is far from most human civilization, its ice sheet is losing mass to the ocean, and is an increasing contribution to sea-level rise," said study co-author Helen Amanda Fricker, a glaciologist at Scripps Institution of Oceanography. This "will have large impacts on coastlines all around all the world.” “The future we choose could determine when we need to rebuild airports, cities and infrastructure … [Read more...] about Global warming has melted over 3 trillion tons of ice in Antarctica since 1992, and it’s only getting worse
Early life flourished in a “greenhouse world” in which there were no polar ice sheets and sea temperatures around what is now Britain rose to 25C. The period in Earth’s history known as the “Cambrian explosion” around half a billion years ago saw a massive increase in the diversity of life. This period saw representatives from all major animal groups emerging for the first time throughout the world’s oceans. Read more First birds had beaks with teeth, prehistoric fossils show Notable among these were the chordates – a lineage that would ultimately give rise to vertebrates including humans. Scientists have long suspected this was a particularly warm period in Earth’s history, but until now it has been difficult to prove. “Because scientists cannot directly measure sea temperatures from half a billion years ago, they have to use proxy data – these are measurable quantities that respond in a predictable way to changing … [Read more...] about Global warming drove ‘explosion’ of life 500 million years ago that ultimately gave rise to humans
Washington (AP) -- NASA's latest nail-biting drama was far from orbit as the Senate narrowly confirmed President Donald Trump's choice of a tea party congressman to run the space agency in an unprecedented party-line vote.In a 50-49 vote Thursday, Oklahoma Rep. James Bridenstine, a Navy Reserve pilot, was confirmed as NASA's 13th administrator, an agency that usually is kept away from partisanship. His three predecessors — two nominated by Republicans — were all approved unanimously. Before that, one NASA chief served under three presidents, two Republicans and a Democrat.The two days of voting were as tense as a launch countdown.A procedural vote Wednesday initially ended in a 49-49 tie — Vice President Mike Pence, who normally breaks a tie, was at Trump's Mar-a-Lago estate in Florida — before Arizona Republican Jeff Flake switched from opposition to support, using his vote as leverage to address an unrelated issue.Thursday's vote included the drama of another … [Read more...] about Trump’s NASA Nominee Narrowly Wins Senate Confirmation
World Bulletin / News Desk U.S. space agency NASA announced Friday the level of wintertime Arctic sea ice is one of the lowest in recorded history. Researchers found sea ice levels for the winter season ending in 2018 were the second lowest since NASA began tracking the ice with satellites in 1979. The four lowest years for sea ice are, in order, 2015, 2016, 2018 and 2017. Every winter, the ice covering the Arctic Ocean surrounding the North Pole thickens and freezes. During the spring and summer months, the ice thins and the extent of the ice retreats. NASA said the amount of sea ice peaked this year on March 17 at approximately 14.5 million square kilometers (5.6 million square miles). This amount was 60,000 square kilometers (23,200 square miles) greater than the peak recorded in March of 2017, the lowest on record. The 2018 maximum winter sea ice level was significantly lower than the average peak level recorded between 1981 and 2010 by 1.16 million square kilometers (448,000 … [Read more...] about NASA says Arctic sea ice historically low in 2018