Posted on January 22, 2015 by Bob Berwyn
New data to help inform projections of sea-level rise
FRISCO — Drilling deep into Antarctic ice this month, researchers were able for the first time to take a close look at the grounding zone of an ice sheet, where Antarctic ice, land and sea all converge.
Sediment samples from the half-mile bore hole will provide clues about the mechanics of ice sheets and their potential effects on sea-level rise, but the drilling also revealed an unsuspected population of fish and invertebrates living beneath the ice sheet, the farthest south that fish have ever been found. Continue reading
Filed under: Antarctica, climate and weather, Environment, global warming | Tagged: Antarctica, climate change, Environment, Ross Ice Shelf, Ross Sea, sea level | Leave a comment »
Posted on January 16, 2015 by Bob Berwyn
Climate researchers call for action at Breck conference
By Adam Spencer
BRECKENRIDGE — For nearly 70 years, Americans breathed poisonous exhaust from leaded gasoline while a team of oil and auto industry-funded scientists maintained that millions of cars burning lead — a potent neurotoxin — was safe. When federal regulators finally started to phase out leaded gasoline in the 1970s, levels of the toxin found in Americans’ blood plummeted by 77 percent.
“The use of leaded gasoline very much mirrors the fight over climate change,” said Dr. Jim White, director of the Institute of Arctic and Alpine Research and a geology and environmental science professor at the University of Colorado.
White argued, at the annual Glen Gerberg Weather and Climate Summit held in Breckenridge this week, that big oil’s arguments against the early warnings of lead’s health impacts (spills at the plants that produced the petroleum additive in the 1920s killed some workers and made others crazy) are very similar to the arguments used today to discredit human-caused climate change. Continue reading
Filed under: Antarctica, Arctic, climate and weather, climate change, Environment, global warming, Greenland | Tagged: Arctic sea ice, Chasing Ice, climate science, Extreme Ice Survey, Glen Gerberg weather and climate summit, global warming, James Balog | 2 Comments »
Posted on January 6, 2015 by Bob Berwyn
Antarctic sea urchins may be able to adapt to global warming. Photo courtesy NOAA.
Lab testing measures response to rising temps, increasing acidification
FRISCO — Sea urchins around the Antarctic Peninsula are able to adapt to warmer and more acidic seawater conditions expected by the end of the century, at least in a laboratory setting.
The study, led by scientists from the British Antarctic Survey and Bangor University, involved collecting 288 sea urchins and and transporting them to the British Antarctic Survey in Cambridge, UK. Continue reading
Filed under: Antarctica, Environment, global warming, ocean acidification | Tagged: Antarctica, British Antarctic Survey, global warming, ocean acidification | Leave a comment »
Posted on December 26, 2014 by Bob Berwyn
Summit Voice environmental coverage in January 2014
Glowing sea anemones cling to the bottom of the Ross Ice Shelf in Antarctica. Photo courtesy Frank Rack, ANDRILL Science Management Office, University of Nebraska-Lincoln.
FRISCO — We started 2014 by reporting on some recent research in Antarctica, where scientists recently found colonies of cold-tolerant sea anemones literally hanging from the bottom of the sea ice with food-gathering tentacles dangling beneath — a “mind-blowing” discovery, according some of the researchers involved. Above all, it shows how much more remains to be discovered in some of the most remote reaches of our fragile blue marble. Read the full story here: ‘Mind-blowing’ anemones found beneath Antarctic ice. Continue reading
Filed under: Antarctica, biodiversity, climate and weather, Environment | Tagged: 2014 environmental news, Antarctic sea anemones, climate hacking, Environment, independent journalism | Leave a comment »
Posted on December 5, 2014 by Bob Berwyn
New research shows signs of a major meltdown in Antarctica. bberwyn photo.
Ocean temperatures increasing steadily near West Antarctica
FRISCO — Warming seawater around parts of Antarctica is speeding the melting and sliding of glaciers, and that there is no indication that this trend will reverse, according to researchers with the University of East Anglia.
The study, published in the journal Science, tracked ocean temperatures in the shallow shelf seas of West Antarctica for the last 50 years. The findings also suggest the areas of warmer seawater are spreading, and that other Antarctic areas, which have not yet started to melt, could experience melting for the first time, which would increase the pace of global sea level rise. Continue reading
Filed under: Antarctica, climate and weather, Environment, global warming | Tagged: climate change, global warming, sea level, Southern Ocean warming, University of East Anglia, West Antarctic Ice Sheet | 1 Comment »
Posted on November 12, 2014 by Bob Berwyn
Detailed measurements to help pinpoint rate of ice shelf melt
Melting Antarctica ice shelves are raising global sea level. bberwyn photo.
FRISCO — The Southern Ocean, surrounding Antarctica, is mostly separated from the rest of the world’s oceans by a sharp temperature boundary and swift currents. But the border between the different masses of water is regularly blurred by giant swirls of water that may be transporting warmer water to the edge of the frozen continent.
Knowing how that process works could help scientists understand how fast Antarctic ice shelves will melt and raise global sea level, according to Caltech scientists who used robotic gliders to track the movement of water in the region. Continue reading
Filed under: Antarctica, climate and weather, Environment, global warming | Tagged: climate change, global warming, sea level rise, Southern Ocean, West Antarctic ice shelf | Leave a comment »
Posted on November 8, 2014 by Bob Berwyn
Warm October weather leads to rapid melting in Ross Sea region
FRISCO — Persistent warm winds from the north have eaten away at the record sea ice extent around Antarctica the past few weeks.
After reaching a new record in September, the ice extent is now back to the levels of about a year ago, according to the National Snow and Ice Data center’s monthly update.
Along Antarctica’s Pacific coast, including around the Ross Ice Shelf and northern West Antarctic Ice Sheet, air temperatures in October ran 7 to 11 degrees Fahrenheit above average. Temperatures were also warmer than average in the eastern Weddell Sea south of Africa. Continue reading
Filed under: Antarctica, climate and weather, Environment, extreme weather | Tagged: antarctic sea ice, Antarctica, climate change, Nimbus satellites | Leave a comment »