You are browsing the archive for climate change Archives - GeoSpace.
24 March 2017
A new study shows U.S. methane emissions did not grow significantly from 2000 to 2013 and are not likely to have been an important driver of the increase in atmospheric methane levels observed worldwide after 2007, as other studies have suggested. The new study provides additional insight into a question that has puzzled scientists for the past decade: what has been causing the increase in global methane levels since 2007?
13 March 2017
Harvard University researchers have a new hypothesis about what caused the runaway glaciation that covered the Earth pole-to-pole in ice.
9 March 2017
Skiing in July? It could happen this year, but California’s days of bountiful snow are numbered. The Sierra Nevada snowpack, which provides 60 percent of the state’s water via a vast network of dams and reservoirs, has already been diminished by human-induced climate change and if emissions levels aren’t reduced, the snowpack could largely disappear during droughts, a new study finds.
2 March 2017
Each year, as sea ice starts to melt in the spring following its maximum wintertime extent, scientists still struggle to estimate exactly how much ice they expect will disappear through the melt season. Now, a new NASA forecasting model based on satellite measurements is allowing researchers to make better estimates.
1 March 2017
A World Meteorological Organization (WMO) committee of experts has announced new records for the highest temperatures recorded in the Antarctic Region as part of continuing efforts to expand a database of extreme weather and climate conditions throughout the world.
24 February 2017
By Ned Rozell As another major rainstorm hit California in February, downtown San Francisco surpassed its normal rain total for an entire year. Reservoirs in the high country were spilling over. So ended a five-year drought in the state that some people attributed to human-caused climate change. Those pictures of dried-up California lakes bothered Syun-Ichi Akasofu, who recently gave a talk “The Forthcoming Ice Age” at the University of Alaska …
16 February 2017
A stalagmite collected from a remote cave in the Middle East has revealed that recent droughts there were more severe than previously thought, and therefore possibly an important contributing factor for the turmoil in Syria. A research team traveled to Iraq to collect the stalagmite and used it to present the first ever detailed climate reconstruction of the Fertile Crescent extending back 2,400 years.
15 February 2017
Surfers aren’t the only people trying to catch big waves. Using decades of global climate data generated at a spatial resolution of about 25 square kilometers (10 square miles), researchers were able to capture the formation of tropical cyclones and the extreme waves that they generate. Those same models, when run at resolutions of about 100 kilometers (60 miles), missed the tropical cyclones and the big waves up to 30 meters (100 feet) high.
8 February 2017
The breakdown of methane hydrates due to warming climate is unlikely to lead to massive amounts of methane being released to the atmosphere, according to a recent interpretive review of scientific literature.
A new study finds evidence that the last time Earth was as warm as it is today, cold freshwater from a melting Greenland Ice Sheet circulated in the Atlantic Ocean as far south as Bermuda, elevating sea levels and altering the ocean’s climate and ecosystems.