Laser-assisted water condensation in the atmosphere: a step towards modulating precipitation?

Field measurements suggest the mechanism of laser-assisted water condensation

Because of the potential impact on agriculture and other key human activities, efforts have been dedicated to the local control of precipitation. The most common approach consists of dispersing small particles of dry ice, silver iodide, or other salts in the atmosphere. Here we show, using field experiments conducted under various atmospheric conditions, that laser filaments can induce water co...

Condensation and Water Drops Formation due to Endothermic Reaction by Laser Pulse through Natural Lighting Phenomena in the atmosphere

After lightning, precipitation formed, these lightning phenomena occur in the atmosphere by high power laser pulse. After striking the laser pulse, condensation and water drop formation take place in the atmosphere. It is well known that, for water drop formation, condensation must occurred (condensation is the basic need for water drops formation).Condensation means, heat energy subtraction. H...

Femtosecond laser filament induced condensation and precipitation in a cloud chamber

A unified picture of femtosecond laser induced precipitation in a cloud chamber is proposed. Among the three principal consequences of filamentation from the point of view of thermodynamics, namely, generation of chemicals, shock waves and thermal air flow motion (due to convection), the last one turns out to be the principal cause. Much of the filament induced chemicals would stick onto the ex...

Water in the atmosphere

A First Step Towards GPU-assisted Query Optimization

Modern graphics cards bundle high-bandwidth memory with a massively parallel processor, making them an interesting platform for running data-intensive operations. Consequently, several authors have discussed accelerating database operators using graphics cards, often demonstrating promising speed-ups. However, due to limitations stemming from limited device memory and expensive data transfer, G...