Spraying tiny saltwater droplets of appropriate sizes and numbers into the air, such that they move upwards under thermals and turbulence and then nucleate or thicken marine cloud that increases cloud solar reflectivity, and helps to cool the planet during daylight (but insulates it during the dark hours, partially offsetting the cooling and shading effects).

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Nature-based Ocean and Atmospheric Cooling TechniquesReferences
Marine Cloud Brightening (MCB)View
Short DescriptionSpraying tiny saltwater droplets of appropriate sizes and numbers into the air, such that they move upwards under thermals and turbulence and then nucleate or thicken marine cloud that increases cloud solar reflectivity, and helps to cool the planet during daylight (but insulates it during the dark hours, partially offsetting the cooling and shading effects).
DescriptionMCB may sustainably be generated using power from offshore wind turbines, from drone vessels, and conceptually from manned vessel emissions, seawater sprays, and waste heat. Spare energy may also be used to sublimate nano-sized iron salt aerosols (ISA) of ferric chloride that efficiently photocatalyse the destruction of the powerful, airborne greenhouse gas methane (CH4) from the same platforms.
MethodsEffectsProjects
Salter Spray Ship (SSS)
Mobility
Some evaporative potential
Possibility of wreckage
Power-limited
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Seatomisers/ISA
Minor potential to increase ocean flotsam
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Wind-powered Salter Spray Ships are used to generate cloud condensing nuclei (CCN) designed to thicken marine cloud, thus cooling both the ocean surface waters and the atmosphere.
Floating Seatomiser masts use wind turbine energy to spray seawater droplets of specific size ranges into the lower troposphere. Commercial spray nozzles are modified to work at higher tri-phasic pressures and to produce droplets for different purposes: coarse and medium sized ones to humidify air at different wind speeds, and baffle-conditioned, fine ones from flat fan spray nozzles to generate evaporating droplets that nucleate marine cloud and/or create sea salt aerosols (SSA).
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