Unknown post type
Unknown post type
Australia’s bushfires wiped out a billion animals, California’s fire season wreaks more havoc every year, and record-setting storms are tearing through our communities like never before.
Scientists tell us we have 10 years left to dramatically reduce emissions. We have no room for meek half-measures wrapped up inside giant handouts to the fossil fuel industry.
We deserve a world without fossil fuels. A world in which workers and communities thrive and our shared climate comes before industry profits. Working together, I know we can make it happen. We have no time to waste.
Here the scientists are studying the ‘translational’ or forward motion of hurricanes, rather than the eye of the storm wind speeds. Because no matter how fast wind speeds are, the storm can still be slow moving.
It is estimated that the world has a remaining carbon budget of around 1,000 gigatonnes of carbon dioxide, meaning that this is the absolute limit to our future emissions if we want to prevent a 2°C rise in global temperatures compared to pre-industrial levels. Yet after analyzing more than 40 different climate models, the study authors found that the Arctic will sometimes be ice-free in summer even if we stick to this budget.
“If we reduce global emissions rapidly and substantially, and thus keep global warming below 2°C relative to preindustrial levels, Arctic sea ice will nevertheless likely disappear occasionally in summer even before 2050. This really surprised us,” said study author Dirk Notz, from the University of Hamburg in Germany, in a statement.
In an attempt to cool waters around the reef by making clouds reflect more sunlight, researchers said they used a boat-mounted fan similar to a snow cannon to shoot salt crystals into the air.
Results from the trial were “really, really encouraging”, the project’s lead scientist Daniel Harrison from Southern Cross University said on Friday.
“All the research is theoretical… so this an absolute world first to go out and actually try and take seawater and turn it into these cloud condensation nuclei,” he told AFP.
Harrison stressed that despite the success of the experiment, at least four years of further research would be needed to prove the theory.
When they examined the projections, the researchers were surprised that sudden collapses appeared across almost all species — fish, reptiles, amphibians, birds and mammals — and across almost all regions.
“It’s not that it happens in some places,” said Cory Merow, an ecologist at the University of Connecticut and one of the study’s authors. “No matter how you slice the analysis, it always seems to happen.”
If greenhouse gas emissions remain on current trajectories, the research showed that abrupt collapses in tropical oceans could begin in the next decade. Coral bleaching events over the last several years suggest that these losses have already started, the scientists said. Collapse in tropical forests, home to some of the most diverse ecosystems on earth, could follow by the 2040s.