Q. Why are cloud droplets larger over the ocean?

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Presentation transcript:

Q. Why are cloud droplets larger over the ocean?

Most collide on forward edge Some collide on backside Terminal velocity: Almost 10 m/s for largest raindrops

Q. Why can a cumuliform cloud produce heavier precipitation than a stratiform cloud?

Supercooled water droplets

Ice forms directly on ice nuclei Promote freezing of supercooled droplets (contact nuclei)

Higher saturation vapour pressure Ice crystals grow at the expense of water droplets

Riming causes snow pellets (graupel) -supercooled droplets freeze on contact Snowflakes form through aggregation

Source: Desert Research Institute, Nevada, USA Source: North Dakota Cloud Modification Project, USA

Remember the paper cup experiment

CHAPTER 10

Sonic transducers SOUND WAVES DETERMINE WIND SPEED, DIRECTION & TEMPERATURE

Also SW Ontario

VANCOUVERLETHBRIDGE 8°C8°C 12°C X X Cooling At MALR 6°C/km Warming At DALR 10 °C/km Cooling At DALR 10 °C/km Cooling At MALR 6°C/km Warming At DALR 10 °C/km More sensible heat

Santa Ana Winds

Buried Portion Exposed section Entrained Particle

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