What is the net radiative effect of thin, high clouds like cirrus?

1. What is the net radiative effect of thin, high clouds like cirrus?

No net effect at all

A net warming effect

It varies randomly by season

A net cooling effect

2. What is the net radiative effect of thick, low clouds?

A net warming effect

A net cooling effect

An effect that is purely random

No net effect at all

3. Why do high clouds cause a net warming effect despite reflecting little sunlight?

They strongly absorb and re-emit outgoing infrared radiation

They have unusually high albedo

They contain more water than low clouds

They block all incoming sunlight

4. What effect does every cloud, regardless of height, have on incoming solar radiation?

It reflects some of it back to space

It has no effect on solar radiation

It absorbs all of it completely

Only ice clouds reflect any sunlight

5. What mainly decides whether a given cloud type causes net warming or net cooling?

The balance between its solar reflection and infrared trapping

The cloud’s color alone

The time of day alone

Local wind speed alone

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