Water Vapor Protocol
http://www.globe.gov/tctg/atmo_prot_watervapor.pdf?sectionId=283


When last checked this resource was offline Our automated link checker has alerted the folks responsible for the part of our site where this problematic link is referenced. If you have further information about the link (e.g. a new location where the information can be found) please let us know.

You may be able to find previous versions at the Internet Archive.

The purpose of this activity is to measure the total precipitable water vapor (column water vapor) in the atmosphere above an observer's site. Students point a GLOBE/GIFTS water vapor instrument at the sun and record the voltage readings from a digital voltmeter. They observe sky conditions near the Sun and perform the Cloud Protocols. Intended outcomes are that students understand the concept that the atmosphere prevents some of the sun's light from reaching Earth's surface, how water vapor measurements relate to the hydrologic cycle, and how greenhouse gases, such as water vapor, play an important role in weather and climate. Supporting background materials for both student and teacher are included.


Subject: Geoscience:Atmospheric Science
Resource Type: Activities:Field Activity
Special Interest: Field-Based Teaching and Learning
Grade Level: High School (9-12), Middle (6-8)
Climate Literacy Principles: Complex Interactions:Water Cycle, Sun Drives Earth System:Greenhouse Effect, UV, Infrared, Complex Interactions:Greenhouse Gases, The Nature of Science:Observational Data
Topics: Human Dimensions/Resources, Atmosphere