Measure the aerosol optical thickness of the atmosphere (how much of the sun’s light is scattered or absorbed by particles suspended in the air). Students point a GLOBE sun photometer at the sun and record the largest voltage reading they obtain on a digital voltmeter connected to the photometer. Students observe sky conditions near the sun, perform the Cloud, Barometric Pressure and Relative Humidity Protocols, and measure current air temperature.
Categories
GLOBE Protocols
Aerosols
Atmosphere
Scientists
Students
Teachers
HS-PS4-1
HS-PS4-5
PS: Electromagnetic Radiation
15-20 minutes / daily
PS: Wave Properties
Secondary: 9-12
MS-PS4-2
ESS: Earth Materials and Systems
Middle: 6-8
HS-ESS2-2
English
ESS: Weather and Climate
MS-ESS2-5
Protocol Instructions
Supporting Water Vapor
