Losing Earth & Hothouse Earth

Flash Droughts Are Becoming More Common.

I wanted to bookmark two well-written articles on climate change that contain useful information. Nothing better than a blog post for making a record.

Here is a link to download Trajectories of the Earth System in the Anthropocene. The article describes the apocalypse that will probably occur if Earth warms by two degrees Celsius.

“Our study suggests that human-induced global warming of two degrees Celsius may trigger other Earth system processes, often called “feedbacks,” that can drive further warming – even if we stop emitting greenhouse gases,” –Will Steffen, lead author of the study published in the journal PNAS.

The article is catching lots of attention, but not as much as the Sunday NY Times article by Nathaniel Rich. All the major news media are discussing that article: Losing Earth; the Decade We Almost Stopped Climate Change.

“Like most human questions, the carbon-dioxide question will come down to fear. At some point, the fears of young people will overwhelm the fears of the old. Some time after that, the young will amass enough power to act. It will be too late to avoid some catastrophes, but perhaps not others” — Nathaniel Rich, NYT.

Reading Losing Earth followed by Trajectories provides excellent context for the need for climate action.

Gradual CO2 buildup can trigger sudden climate tipping points

GR:  Turning points, cascading failures, tipping points, and positive feedback loops are some of the terms used to describe our precarious thin-ice position. This story describes more evidence that devastating sudden events can occur. We are in danger folks, and the source is one that we have created ourselves. Greed is limiting the vision of our leaders. We must use every available means to show them what might happen.

A new study links rising CO2 concentrations with disruptions to key climate-controlling currents during ice age climate shifts.

Ice age ocean current disruptions linked with greenhouse gas changes

“Scientists say they’ve discovered another huge climate warning sign in the Arctic. Past increases in CO2 levels in the air drove ocean currents to a tipping point had a big impact on hemispheric weather patterns.

“Within the span of just a few decades, rising CO2 concentrations drove temperatures in Greenland up by 10 degrees Celsius, according to a new study led by researchers with the Alfred Wegener Institute and the University of Cardiff.

“The study, published in the journal Nature Geoscience, confirms that, in the past, gradually rising CO2 concentrations have set off abrupt changes in ocean circulation. These sudden changes, referred to as Dansgaard-Oeschger events, have been observed in ice cores collected in Greenland.” –Bob Berwyn (Continue reading: Gradual CO2 buildup can trigger sudden climate tipping points – Summit County Citizens Voice.)