Hurling Boiling Water in Extremely Low Temperatures.
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Hurling Boiling Water in Extremely Low Temperatures.
Originally posted by Linescapes on FB.
I am dubbing 2018 the year of floating wetlands… I am super excited by these new Biohabitats babies launched last fall!
“Don’t cling to a mistake just because you spent a lot of time making it.”
— Unknown
Stop using the worst-case scenario for climate warming as the most likely outcome — more-realistic baselines make for better policy.
Excerpt from this story from Nature:
More than a decade ago, climate scientists and energy modellers made a choice about how to describe the effects of emissions on Earth’s future climate. That choice has had unintended consequences which today are hotly debated. With the Sixth Assessment Report (AR6) from the Intergovernmental Panel on Climate Change (IPCC) moving into its final stages in 2020, there is now a rare opportunity to reboot.
In the lead-up to the 2014 IPCC Fifth Assessment Report (AR5), researchers developed four scenarios for what might happen to greenhouse-gas emissions and climate warming by 2100. They gave these scenarios a catchy title: Representative Concentration Pathways (RCPs). One describes a world in which global warming is kept well below 2 °C relative to pre-industrial temperatures (as nations later pledged to do under the Paris climate agreement in 2015); it is called RCP2.6. Another paints a dystopian future that is fossil-fuel intensive and excludes any climate mitigation policies, leading to nearly 5 °C of warming by the end of the century. That one is named RCP8.5.
RCP8.5 was intended to explore an unlikely high-risk future. But it has been widely used by some experts, policymakers and the media as something else entirely: as a likely ‘business as usual’ outcome. A sizeable portion of the literature on climate impacts refers to RCP8.5 as business as usual, implying that it is probable in the absence of stringent climate mitigation. The media then often amplifies this message, sometimes without communicating the nuances. This results in further confusion regarding probable emissions outcomes, because many climate researchers are not familiar with the details of these scenarios in the energy-modelling literature.
This is particularly problematic when the worst-case scenario is contrasted with the most optimistic one, especially in high-profile scholarly work. This includes studies by the IPCC, such as AR5 and last year’s special report on the impact of climate change on the ocean and cryosphere. The focus becomes the extremes, rather than the multitude of more likely pathways in between.
Happily — and that’s a word we climatologists rarely get to use — the world imagined in RCP8.5 is one that, in our view, becomes increasingly implausible with every passing year. Emission pathways to get to RCP8.5 generally require an unprecedented fivefold increase in coal use by the end of the century, an amount larger than some estimates of recoverable coal reserves. It is thought that global coal use peaked in 2013, and although increases are still possible, many energy forecasts expect it to flatline over the next few decades. Furthermore, the falling cost of clean energy sources is a trend that is unlikely to reverse, even in the absence of new climate policies.
Assessment of current policies suggests that the world is on course for around 3 °C of warming above pre-industrial levels by the end of the century — still a catastrophic outcome, but a long way from 5 °C. We cannot settle for 3 °C; nor should we dismiss progress.
“Happily — and that’s a word we climatologists rarely get to use — the world imagined in RCP8.5 is one that, in our view, becomes increasingly implausible with every passing year. Emission pathways to get to RCP8.5 generally require an unprecedented fivefold increase in coal use by the end of the century, an amount larger than some estimates of recoverable coal reserves. It is thought that global coal use peaked in 2013, and although increases are still possible, many energy forecasts expect it to flatline over the next few decades. Furthermore, the falling cost of clean energy sources is a trend that is unlikely to reverse, even in the absence of new climate policies.”
Biking can be so much fun.
“Sometimes what you’re most afraid of doing is the very thing that will set you free.”
— Robert Tew
“I have spent my whole life terrified. Scared of things that could go wrong. Things that might happen; things that might not happen. But in time I’ve seen that it’s fear that’s the real enemy. So get up. Get out there, and live the life you want to live.”
— Unknown
If rolled out globally, the islands could offset the total global emissions from fossil fuels.
Scientists in Norway and Switzerland have proposed that “Solar Methanol Islands” could use solar energy to recycle atmospheric CO2 into methanol fuel.
The idea arose when scientists were trying to find a way to provide electricity to future off-shore fish farms without access to power grids. Solar energy could power hydrogen production and CO2 extraction from seawater, which would produce gases that could be reacted to form methanol.
The team of scientists wrote:
“Humankind must cease CO2 emissions from fossil fuel burning if dangerous climate change is to be avoided. However, liquid carbon-based energy carriers are often without practical alternatives for vital mobility applications. The recycling of atmospheric CO2 into synthetic fuels, using renewable energy, offers an energy concept with no net CO2 emission.”
Currently, the team of scientists is working on prototypes for the floating solar islands.
Thanks to @sabre-fish for sending this in!
If rolled out globally, the islands could offset the total global emissions from fossil fuels.
Scientists in Norway and Switzerland have proposed that “Solar Methanol Islands” could use solar energy to recycle atmospheric CO2 into methanol fuel.
The idea arose when scientists were trying to find a way to provide electricity to future off-shore fish farms without access to power grids. Solar energy could power hydrogen production and CO2 extraction from seawater, which would produce gases that could be reacted to form methanol.
The team of scientists wrote:
“Humankind must cease CO2 emissions from fossil fuel burning if dangerous climate change is to be avoided. However, liquid carbon-based energy carriers are often without practical alternatives for vital mobility applications. The recycling of atmospheric CO2 into synthetic fuels, using renewable energy, offers an energy concept with no net CO2 emission.”
Currently, the team of scientists is working on prototypes for the floating solar islands.
Thanks to @sabre-fish for sending this in!
Retaining/ Seating wall -- love the texture change
The Internet's favorite undersea autonomous vehicle's maiden voyage reveals how how Antarctic bottom water is affected by changing wind patt
What a great name for the sub.
“Breathe. It’s only a bad day, not a bad life.”
— Ashley Purdy
tire chairs
Figure 1. Architectural shape affecting the wind flow.