GLOBE Equipment - Biosphere

GLOBE Instrument Specifications

All GLOBE instrument specifications described below represent the minimum specifications necessary to collect scientifically valid data. GLOBE schools may use instruments that meet or exceed these specifications. For example, the GLOBE specifications for pH paper call for a range of 2 to 9 pH units. A pH paper with a range of 1 to 14 exceeds specifications and may be used by GLOBE schools.

Land Cover

Biometry - All Skill Levels

Layout of a Land Cover Site

Instrument Specifications: Tape Measure

Tree Circumference

Instrument Specifications: Tape Measure

Tree Height

Instrument Specifications: Clinometer

Canopy Cover

Instrument Specifications: Densiometer

Ground Cover

Grass Biomass

Species Identification

Phenology

Green-Down – All Skill Levels

Instrument Specifications: Local Plant Identification Guide

Instrument Specifications: Camera

Green-Up – All Skill Levels

Land Cover

Biometry - All Skill Levels

Layout of a Land Cover Site

Instrument Specifications: Tape Measure

50 m tape, graduated one side, marked in 2 mm or smaller units.

Tree Circumference

Instrument Specifications: Tape Measure

The tape measure described in Layout of a Land Cover Site can be used for this measurement. Smaller metric tape measures can also be used for this measurement.

Tree Height

Instrument Specifications: Tape Measure

The tape measure described in Layout of a Land Cover Site can be used for this measurement.

Instrument Specifications: Clinometer

The clinometer as described in the Biosphere Investigation can be made by students. See Investigation Instruments: Clinometer for instructions. Alternative clinometers may consist of a moveable dial within a metal case and lens viewer. For the moveable dial version, the scale must be graduated from 0-90˚ in 1˚ units.

Canopy Cover

Instrument Specifications: Densiometer

The densiometer as described in the Biosphere Investigation can be made by students. See Investigation Instruments: Densiometer for instructions.

Ground Cover

Instrument Specifications: None

Grass Biomass

Instrument Specifications: Balance

This balance must have the capacity to weigh 300 grams with an accuracy of +/- 0.1 gram. It can be either mechanical or electronic. It is assumed that a balance is available locally, for example in a high school science laboratory.

Instrument Specifications: Drying Oven (plants)

This oven must be capable of holding samples at 50-70 C for up to two days and must be ventilated to allow moisture to escape. The interior dimensions of the oven must be at least 25 cm x 30 cm x 25 cm. It is assumed that an oven is available locally, for example in a high school science laboratory. The oven should be designed for drying biological samples or food and should not be a conventional cooking oven, which could present a fire hazard in this application.

Species Identification

Instrument Specifications: Dichotomous Keys

Acquire dichotomous keys for tree identification locally.

Phenology

Green-Down – All Skill Levels

Instrument Specifications: Plant Color Guide

A guide made of weather-resistant paper that contains reference color chips based on the Munsell System of Color Notation. The following colors should be displayed: 5G 8/4, 5G 7/4, 5G 6/2, 5G 4/2, 5GY 3/2, 5GY 4/8, 2.5Y 8/6, 2.5Y 8/12, 5YR 7/12, 5GY 7/12, 5GY 6/10, 5GY 5/10, 2.5Y 6/6, 5Y 8/4, 7.5YR 8/4, 7.5YR 6/4, 7.5YR 5/4, 7.5YR 3/4, 5R 3/4, 2.5R 4/2, 2.5R 4/4, 2.5R 4/6, 2.5R 4/8, 2.5R 4/12. Each color chip must be positioned near a cutout that allows color comparison between plant leaves and the reference chips.

Instrument Specifications: Local Plant Identification Guide

Local Plant Identification Guides for tree identification are not available from a central supplier; they need to be acquired locally.

Instrument Specifications: Camera

A digital camera or a camera with color film. Mobile phone cameras can also be used.

Green-Up – All Skill Levels

Instrument Specifications: Dichotomous Keys

Acquire dichotomous keys for tree identification locally.

Instrument Specifications: Camera

A digital camera or a camera with color film. Mobile phone cameras can also be used.