In theory, aerial vehicles such as drones could be used to deliver and then inject solid aerosol particles, such as desert dust or pollen,
into cirrus clouds.
Long, white vapor trails blending
into cirrus clouds and cooling over southeastern England during World War II have led researchers to believe that contrails could influence climate.
Not exact matches
Besides SSCE, scientists have also been investigating stratospheric sulfur injections — firing sun - reflecting aerosols
into the air, similar to the cooling effect after a volcanic eruption — and
cirrus cloud thinning, where you thin the top level of
clouds, which have a warming effect on the planet.
Small details, like the tiny knobs of yellow popping out of the mist in «Profile (Orb)» (2015), seem to blossom
into revelations, enticing you to peer more deeply
into the surface, as if the picture plane were an aerial view high above
cirrus clouds, offering hazy glimpses of the Earth below.
The premise of Lindzen's hypothesis was that as the climate warms, the area in the atmosphere covered by high
cirrus clouds will contract to allow more heat to escape
into outer space, similar to the iris in a human eye contracting to allow less light to pass through the pupil in a brightly lit environment.
The report considers all the gases and particles emitted by aircraft
into the upper atmosphere and the role that they play in modifying the chemical properties of the atmosphere and initiating the formation of condensation trails (contrails) and
cirrus clouds.
The third experiment would explore the potential for making
cirrus clouds in the upper atmosphere more porous to radiation bouncing back
into space from Earth.
They found that in the central Pacific region when the sea surface temperature rises there is less
cirrus cloud cover and thus more energy radiates out
into space.
The idea, Lohmann said, is to inject solid particles, like desert dust,
into the atmosphere at spots slightly lower than where
cirrus clouds would naturally form.
Persisting contrails can spread
into extensive
cirrus clouds that tend to warm the Earth, because they reflect less sunlight than the amount of heat they trap.
As to the effect mentioned in your comment, as I understand it, cumulus
clouds reflect infrared radiation back
into space while
cirrus clouds catch infrared radiation leaving earth and reflect it back to earth.
As these cumulus convective
clouds grow taller,
cloud water droplets collide and combine
into raindrops and fall out of the
cloud or continue to rise until they freeze
into ice crystals and form
cirrus clouds.
This is because planes emit mono - nitrogen oxides
into the upper troposphere, form contrails, and seed
cirrus clouds with aerosols from fuel combustion.
Contrails can evolve
into extended
cirrus clouds.