Reducing global emissions in line with the Paris Agreement’s goals would have a clear impact on global temperatures within two decades, a new study says. While climate research often focuses on the impacts of global emissions cuts in the second half of this century and beyond, the new analysis suggests there are also “substantial near-term benefits”. Shifting to a pathway in line with 1.5C of global warming, for example, would reduce the risk of seeing “unprecedented warming rates” in the next 20 years by a factor of 13 compared to a no-mitigation scenario, the researchers say.
Carbon Brief 7th Dec 2020 read more »
The grasslands of northern China and Mongolia could be about to lurch into a climate tipping point, an irreversible sequence of heat and drought. This is a landscape that helped shape world history. The Hun forces that humbled the western Roman Empire 16 centuries ago, and the conquering hordes led by Genghis Khan that commanded most of the Asian continent and threatened Europe eight centuries later, both emerged from tribes of nomad herdsmen from its grasslands. Now it could itself be about to be reconfigured by human-driven climate change. And that same anthropogenic climate tipping point poses the same threat to great tracts of south-east Australia: water could become more scarce, bush fires could become more frequent, and winds could begin to blow away the parched soils in droughts that could last decades, or even centuries. Both studies are based on evidence from the past, and both on the story told by preserved annual growth rings. The warning from inner East Asia is based on the testimony of tree stumps and timbers from the last 260 years, say researchers in the journal Science.
Climate News Network 8th Dec 2020 read more »
The Arctic’s rapid transformation into a less frozen, hotter and biologically altered place has been further exacerbated by a year of wildfires, soaring temperatures and loss of ice, US scientists have reported. The planet’s northern polar region recorded its second hottest 12-month period to September 2020, with the warmest temperatures since 1900 all now occurring within the past seven years, according to an annual Arctic report card issued by the National Ocean and Atmospheric Administration (Noaa). The Arctic is heating up at a rate around double that of the global average, due to the human-caused climate crisis.
Guardian 8th Dec 2020 read more »