University of Manchester scientists have identified the most energy-efficient way to make clouds more reflective to the sun in a bid to combat climate change.
Marine Cloud Brightening is a reversible geoengineering method proposed to mitigate rising global temperatures. It relies on propelling a fine mist of salt particles high into the atmosphere to increase the albedo of clouds – the amount of sunlight they reflect back into space. This would then reduce temperatures on the surface, as less sunlight reaches the Earth.
Clouds form when water droplets gather on dust or other particles in the air. Increasing the amount of salt particles in the atmosphere allows more of these water droplets to form, making the clouds denser and therefore more reflective.
A new paper, published in the journal Philosophical Transactions of the Royal Society A, has looked at four different ways of getting the particles into the sky, to compare how effective they may be. The researchers found that a technique called the ‘Rayleigh Jet’ proved to be best.
Named after Lord Rayleigh, who provided the theory, the technique relies on spraying a fine jet of water that breaks down into small droplets into the sky. The liquid droplets evaporate quickly, leaving behind just the salt particles.
These particles, say the paper’s authors, could be generated from specially built ships that could travel the world’s oceans spraying salt particles into the air where they then hang in the atmosphere for several days until they return to Earth as rain.
Previous studies have optimised the size of the salt particles needed to produce the best increase in cloud reflectance but haven’t taken into account how much energy the technique would need and how much it would cost to operate. This new paper, by teams at the universities of Manchester, Washington and Edinburgh, tackled this question. The researchers tested each technique so there was an increase in reflection of 5%, a figure that would combat the predicted effects of increased carbon dioxide levels over the rest of this century. They then looked at how much energy each would consume.
The scientists say that the Rayleigh jet method could produce the desired effect using 30 megawatts of energy, about the same energy that two large ships produce.
The Latest on: Cloud brightening
via Google News
The Latest on: Cloud brightening
- Pictures from space! Our image of the dayon August 3, 2020 at 6:06 am
Hanneke Weitering Friday, March 27, 2020: Comet C/2019 Y4 Atlas is slowly brightening in the night ... Known as LHA 120-N 150, this bright pink space cloud is located more than 160,000 light ...
- Scientists May Have Just Found The Youngest Neutron Star Everon August 2, 2020 at 11:06 pm
For years, scientists examined this cataclysm’s afterglow, observing the bright, expanding gaseous shells. But inside, embedded within dusty clouds, a remnant core must exist. SN 1987A was a type II ...
- Skylum Luminaron July 30, 2020 at 10:44 pm
SEE ALSO: Adobe June Creative Cloud Update: InDesign Edit Shares ... There's also a Dodge & Burn local adjustment brush for brightening or toning down specific areas. The Accent AI Filter ...
- Christine Lampard thanks Brian Blessed for ‘brightening’ her day with virus ranton July 30, 2020 at 9:54 am
Christine Lampard has thanked Brian Blessed for “brightening up our morning” after the actor turned the air blue ranting about Covid-19 on live TV. The 83-year-old actor told the virus to ...
- The Future of Skincare Looks Bright: Perricone MD Introduces its Most Powerful and Potent Vitamin C Technologyon July 17, 2020 at 6:06 am
The powerful trio works in synergy to protect against free radicals, boost the look of collagen-rich skin and penetrate deep into skin's surface for maximum brightening benefits. To stabilize and ...
- I've Tried Basically Every Glossier Product—This Is What I Really Thinkon July 16, 2020 at 5:00 pm
Glossier claims the extra-tiny droplets are 33% smaller than the average spray, and it certainly delivers a fine rose-scented cloud to the skin ... minimising the appearance of breakouts and ...
- Coalition backs 'cloud-brightening' trial on Great Barrier Reef to tackle global heatingon July 14, 2020 at 10:32 am
The announcement confirms the development of a technique known as marine cloud brightening, trialled on the reef in March, will be backed as part of the government’s $443m grant being ...
- The Brightening Outlook for S&P 500 Bullson July 13, 2020 at 9:48 am
I doubted that Thursday’s downswing was a shot across the bow courtesy of the bears, and instead laid out the case for why the stock upswing is likely to renew itself when I looked at the big ...
- Vonage Contact Center Helps Homeless Link Handle 250% Increase in Calls During COVID-19on July 7, 2020 at 5:00 pm
Vonage (Nasdaq: VG), a global leader in cloud communications helping businesses accelerate their digital transformation, today announced that Homeless Link has been able to handle a 250 percent ...
via Bing News