"Scientists studied a number of volcanic eruptions including Mount Pinatubo in the Philippines"
Volcanoes and cooling:
The Next Big Volcano Could Briefly Cool Earth. NASA Wants to Be Ready.
"A quarter-century ago, Pinatubo, a volcano in the Philippines, blew its top in a big way: It spewed a cubic mile of rock and ash and 20 million tons of sulfur dioxide gas into the atmosphere. The gas spread around the world and combined with water vapor to make aerosols, tiny droplets that reflected some sunlight away from the Earth. As a result, average global temperatures dropped by about one degree Fahrenheitfor several years."
Climate crisis 233m years ago reshaped life on Earth,
say scientists
Volcanic eruptions drove global heating, causing mass extinctions and ushering in dinosaur era
www.theguardian.com/...
Graphic explaining the cloud seeding process, the traditional method of rainmaking. Indonesia has started cloud seeding to induce rain as the archipelago moves to head off annual forest fires blamed for blanketing swathes of Southeast Asia in toxic haze.May 28, 2020
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Phys.org › Earth › Environment
Solar geoengineering could be ‘remarkably inexpensive’ – report
IPCC authors suggest there is high agreement that injection of chemicals into stratosphere could help limit rises
- Full report: We have 12 years to limit climate change catastrophe, warns UN
-
The authors of the new 1.5C study by the Intergovernmental Panel on Climate Change say there is high agreement that the injection of millions of tonnes of sulphur dioxide into the stratosphere could help limit temperature rises to the most ambitious target of the Paris accord.
But the authors warn there are major uncertainties about the social, environmental and ecological impacts, which mean the world would be far better off if policymakers strengthened natural cooling systems such as forest cover and accelerated efforts to reduce carbon emissions.
- www.theguardian.com/...
Geoengineering may be used to combat global warming, experts say
"IPCC authors suggest there is high agreement that injection of chemicals into stratosphere could help limit rises
The world may increasingly look to geoengineering in the wake of the latest UN climate report, which says it could be adopted as a temporary “remedial measure” if the world heads towards dangerous levels of warming.
The authors of the new 1.5C study by the Intergovernmental Panel on Climate Change say there is high agreement that the injection of millions of tonnes of sulphur dioxide into the stratosphere could help limit temperature rises to the most ambitious target of the Paris accord.
But the authors warn there are major uncertainties about the social, environmental and ecological impacts, which mean the world would be far better off if policymakers strengthened natural cooling systems such as forest cover and accelerated efforts to reduce carbon emissions.
The lengthy document – which was approved at the weekend by all 195 nations in the UN – mentions several options for man-made interference in climate systems, including ocean fertilisation, carbon dioxide removal, marine cloud brightening, cirrus cloud thinning and ground-based albedo modification."
theguardian.com/...
SPICE
Stratospheric Particle Injection for Climate Engineering
Investigating the feasibility, risks and governance associated with Solar Radiation Management
"SPICE (Stratospheric Particle Injection for Climate Engineering) is an EPSRC, NERC and STFC co-funded 3½ year collaboration between ... What is geoengineering and how is it goverened?"
http://www.spice.ac.uk
NASA:
"There’s no planet B. But is there a plan B? Can we save ourselves from the worst effects of climate change? Ideas exist, but there’s no magic bullet – hacking the climate may cause more harm than good. We spoke to Riley Duren, a systems engineer based at NASA’s Jet Propulsion Laboratory (JPL), to get his take on the topic. Riley looks at how we can use observations of planet Earth to make better-informed responses to climate change."
read more:
climate.nasa.gov/...
Could spraying particles into marine clouds help cool the planet?
"The idea of geoengineering, also known as climate engineering, is very controversial. But as greenhouse gases continue to accumulate in our atmosphere, scientists are beginning to look at possible emergency measures.
A new University of Washington study looks at the idea of marine cloud brightening, which a UW group is investigating as a promising strategy to offset global warming. The strategy would spray saltwater into the air to make marine clouds reflect more incoming solar rays."
Read more:
www.washington.edu/…
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On the other side:
Artificial volcanoes designed to reverse global warming could risk natural disasters, scientists warn
Geoengineering to cool the Earth’s climate by imitating volcanic eruptions is a ‘highly risky strategy’ that may increase the frequency of cyclones and droughts in some parts of the world.independent.co.uk/...
Reflecting sun's rays would cause crops to fail, scientists warn
Research shows geoengineering method intended to combat climate change would have adverse effect on agriculturewww.theguardian.com/...
"Most scientists, even those with no interest in personal publicity, are vigorous advocates for their own work. Not this group. “I don’t know how many times I have said this, but the last thing I would ever want is for the project I have been working on to be implemented,’’ Hunt said. “If we have to use these tools, it means something on this planet has gone seriously wrong.’’
www.newyorker.com/...
Dec 14, 2014 · The realization that large volcanic eruptions can trigger climatic cooling has inspired some to call for stratospheric geoengineering projects, which mimic volcanic eruptions
Forest fires:
Cloud seeding
Here’s how it works: Silver iodide particles are dropped into clouds by planes or cannons where they collide with drops of supercooled water and form ice. En route to the ground, the ice melts, creating rain. There are a couple different formulas and ways of doing this, but you get the gist.If you’re a billionaire planning a party, you’d order this done pre-event, meaning you’d have rain and then it would give you clear skies to show off — at a cost of around $131,000, according to Oliver’s Travels, a U.K. based concierge company.
“The evidence is strong that under certain conditions, we can increase rainfall by 10 to 15 percent,” Roelof Bruintjes, a physicist with the National Center for Atmospheric Research told the Scientific American.
Other rain-inducing techniques include rain rockets, popular in China, where rocket launchers fire particles into clouds to encourage rainfall (important for crops) and Thailand’s Bureau of Royal Rainmaking has a number of cloud seeding methods, aimed at clouds of different types — relieving drought was the impetus for the program, which they now license out. “The operation is expected to ease the side impact of climate change suffered by the country,” they said in a press release.
www.google.com/...
More links:
climate.nasa.gov/...
www.geoengineeringmonitor.org/...
www.scmp.com/...
www.theguardian.com/…
www.theguardian.com/…
New Yorker article:
The Climate Fixers
Is there a technological solution to global warming?
www.newyorker.com/...
World Needs to Set Rules for Geoengineering Experiments,
Experts Say
With interest in such research rising, and the risks uncertain, that conservation needs to start now
www.scientificamerican.com/…
Startups have figured out how to remove carbon from the air. Will anyone pay them to do it?
Three startups, Carbon Engineering, Global Thermostat and Climeworks, are making strides with technology that can directly remove carbon dioxide from the air. What they need now is a viable business modelwww.theguardian.com/...
Rising temperatures shrink Arctic sea ice to second-lowest level on record
Sea ice minimum has fallen below 4m sq km for the second time in 40 years as the climate crisis rapidly transforms the region
Don't look away now: are viewers finally ready for the truth about nature?
For decades David Attenborough delighted millions with tales of life on Earth. But now the broadcaster wants us to face up to the state of the planet
www.theguardian.com/...
Be sure to read, recommend and comment in Meteor Blade’s valuable "Spotlight on Green News & Views,” every Saturday at 3pm Pacific Time on the Daily Kos front page.
"SPOTLIGHT ON GREEN NEWS & VIEWS"
EVERY SATURDAY AT 3:00 PM PACIFIC TIME ON THE DAILY KOS FRONT PAGE.
IT'S A GREAT WAY TO CATCH UP ON DIARIES YOU MIGHT HAVE MISSED. BE SURE TO RECOMMEND AND COMMENT IN THE DIARY.
Link at:
dailykos.com
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Save the Planet:
*Turn out the lights *Don't waste water *Avoid creating nighttime light pollution *Avoid burning wood (or other things), as wood fires are both pollutant and carcinogenic *Don't use harmful pesticides *Limit your use of cars and planes (if possible) *Don't use gas powered vehicles *Take out grass and put in a garden or pond (or xeriscape ) *Mow, blow, and whack with electric *Plant for the animals (bees, birds etc) *Plant a tree *Don't micro manage yards, go wilder *Try to use solar *Take a trolley or train *Use energy efficient products or products that work on clean fuels *Reduce dependence on non-biodegradable items* Walk or carpool *Turn down the heat or AC *Reuse items- give to Goodwill or Craig's list rather than dumping *Ride bikes instead of using cars *Cut down or cease eating meat *Use reusable carry bags for groceries not their plastic; second choice, paper bags *Compost *Save the bees *Be an insect friend *Be informed *Write your representative *Elect pro-environment candidates and demand action *Support the Green New Deal *Sign petitions *Get involved *March *Blog about the environment *Tell a friend!
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Friday, Sep 25, 2020 · 12:41:44 AM +00:00
·
Angmar
Greenhouse gas emissions
Lockdowns trigger dramatic fall in global carbon emissions
Responses to coronavirus crisis cause sharpest drop in carbon output since records began
Carbon dioxide emissions have fallen dramatically since lockdowns were imposed around the world due to the coronavirus crisis, research has shown.
Daily emissions of the greenhouse gas plunged 17% by early April compared with 2019 levels, according to the first definitive study of global carbon output this year.
The findings show the world has experienced the sharpest drop in carbon output since records began, with large sections of the global economy brought to a near standstill. When the lockdown was at its most stringent, in some countries emissions fell by just over a quarter (26%) on average. In the UK, the decline was about 31%, while in Australia emissions fell 28.3% for a period during April.