Use this chart to help you determine what types of contrails you have (if any), cloud type, cloud height, and cloud opacity.

This is a dichotomous key useful in narrowing down what type(s) of clouds you are observing.

This pdf will take you through the essentials of all you ever wanted to know about contrails and why it is important that we investigate and study them.

A quick chart to help you identify each of the three (3) different categories of contrails that we track when submitting data through the GLOBE Observer App.

Please go through this PowerPoint very carefully BEFORE making any cloud observations. It's pretty technical but please get out of it what you can. The more you read and understand, the better your cloud observations will be!

This is an abbreviated version of the above PowerPoint with specific screenshots to help walk you through the process. If you have any questions about this citizen science project, don't be afraid to ask for some help!

This is a very important video to watch as it takes you through all the various observations you will need to make of the sky besides just what kinds of clouds are present.

Why scientists are interested in clouds and how citizen observations can help further cloud science.

A quick video to give you some historical perspective on how we first named clouds.

Monitoring clouds and cloud cover helps us to be understand climate change.

A TED video on why cloud watching is good for you.