‘The path we’re on is foolish and dangerous and will lead to unacceptable changes’
By Bob Berwyn
SUMMIT COUNTY —Underscoring the inexorable increase in atmospheric carbon dioxide pollution, the National Oceanic and Atmospheric Administration reported today that average monthly concentrations of CO2 in the air around Barrow, Alaska reached 400 parts per million for the first time ever.
Carbon dioxide, emitted by fossil fuel combustion and other human activities, is the most significant greenhouse gas contributing to climate change.
The record-high readings came in April and May, at a time of year when CO2 levels are highest in the northern hemisphere just before plants start to absorb the gas as part of their growing cycle, but are worrisome nonetheless as an indicator of global CO2 levels.
SUMMIT COUNTY — Studying remnants of ancient algae from seabed cores has helped scientists from Purdue and Yale universities pinpoint a link between a drastic drop in atmospheric carbon dioxide levels and formation of the Antarctic ice sheet.
Based on their research, the scientists said declining CO2 levels appear to be the driving force that led to formation of the Antarctic ice sheet.
Paleoclimate data suggest some constraints to warming trend
By Summit Voice
SUMMIT COUNTY — By reconstructing global temperatures during the peak of the last ice age, a team of researchers say they’ve narrowed down the window of climate sensitivity, helping to quantify how much temperatures will increase as carbon dioxide levels rise.
New NASA model quantifies ‘negative feedback’ effect on climate change
By Summit Voice
SUMMIT COUNTY — More carbon dioxide in the atmosphere will undoubtedly speed up plant growth — and that could help slow the rate of global warming slightly, according to a new NASA computer model that’s helping refine climate change predictions.