Posted on July 12, 2013 by Bob Berwyn
Higher CO2 levels reduce biodiversity
What’s the future of our oceans? Bob Berwyn photo.
By Summit Voice
FRISCO — Studying volcanic vents near the Italian coast has helped scientists gain a glimpse of how increasingly acidic waters could impoverish ecosystems by reducing biodiversity. The study focused in differing levels of acidity around the vents, where carbon dioxide gas bubbles into the water naturally.
“The background, low-grade stress caused by ocean acidification can cause a whole shift in the ecosystem so that everything is dominated by the same plants, which tend to be turf algae,” said lead author Kristy Kroeker, a postdoctoral researcher at the Bodega Marine Laboratory at UC Davis. Continue reading
Filed under: biodiversity, climate and weather, Environment, global warming, Marine biology, ocean acidification, ocean conservation | Tagged: carbon dioxide, climate change, global warming, greenhouse gases, ocean acidification, Proceedings of the National Academy of Sciences of the United States of America, Volcano | 2 Comments »
Posted on May 1, 2013 by Bob Berwyn
UBC geologists examine pyroclastic deposits near summit of tephra cone on south side of Kima’Kho. Key attributes of these deposits established that they were deposited above the level of a surrounding englacial lake. Photo courtesy UBC Science.
Ancient tuyas hold climate clues
By Summit Voice
FRISCO —In what must have been incredible displays of fire and ice, ancient volcanoes once erupted under massive glacial ice sheets, leaving deposits that could help paleoclimatologists unravel some ice age puzzles.
In a recent study, University of British Columbia researchers surveyed those deposits at the Kima’ Kho tuya, which erupted under an ice sheet about 1.8 million years ago. Their findings suggest that he ancient regional ice sheet through which the volcano erupted was twice as thick as previously estimated. Continue reading
Filed under: climate and weather, Environment | Tagged: climate science, Earth Sciences, Geology, Ice sheet, Kawdy Plateau, Kima'Kho, Tuya, University of British Columbia, Volcano | Leave a comment »