Title: GreenDown Protocol
1Green-Down Protocol
2Goals for the Training Session
- Provide an inquiry context for the data
collection and science content - Provide accurate science content
- Review procedures for data collection
- Review data entry and analysis
- Discuss classroom implementation ideas
- Collect feedback from participants
3Inquiry Context
- How long does green-down take for a given
species? - How does the green-down differ between different
species? - How does green-down relate to air temperature?
- Does green-down differ from year to year for the
same tree/shrub?
4Local Inquiry Example
5Why do GLOBE scientists research green-down?
- To calculate growing season length and monitor
interannual changes in growing season duration - To determine how environmental conditions such as
air and soil temperature, soil moisture, and day
length affect plant growth - To monitor the nature and extent of climate
change and its effects on plants and animals - To help interpret satellite observations of
greenness
6Science Content What is green-down?
Green-down marks the end of the growing season
for many plants. A color change is generally
associated with green-down of leaves. The color
will vary by species.
July 1987
November 1987
7Instruments Green-Down
- GPS Receiver
- Local Tree/Shrub Identification Guide
- GLOBE Plant Color Guide
- Compass
- Meter stick or tape measure (for grass study
site) - Camera
- Flagging Tape Marker
8The Measurements
- Green-Down Study Site Definition
- GPS location
- Tree/shrub species or grass genus
- Study Site pictures
- Green-Down Protocol
- For tree or shrub date, leaf condition and leaf
color on four leaves of the same branch - For grass date, shoot condition and shoot color
on the four tallest shoots
9Collecting Data Field\Lab Guides Data Sheets
- Field\Lab Guides
- Tree and Shrub Green-Up and Green-Down Site
Selection Field Guide or Grass Green-Up and
Green-Down Site Selection Field Guide - GPS Protocol Field Guide
- Tree and Shrub Green-Down Field Guide or Grass
Green-Down Field Guide - Data Sheets
- Green-Up and Green-Down Site Definition Sheet
- GPS Investigation Data Sheet
- Tree, Shrub and Grass Green-Down Data Sheet
10Collecting Data Green-Up and Green-Down Study
Site
- Site Selection
- At least 2 weeks before budburst
- Convenient location
- Native trees/shrubs or grasses that are not
watered or fertilized are preferred
- Tree and Shrub or Grass Selection
- Identify dominant tree and shrub species or grass
genus - For Tree and Shrub
- Select one dominant, native, deciduous tree/shrub
- Select and flag a healthy, good-sized branch on
the equator-facing side - For Grass
- Select a one-meter square area dominated by grass
plants
11Collecting Data Protocol
- First Time
- Photograph your site
- For Tree or Shrub
- Locate and mark leaf at end of selected branch
- Locate and mark three other closest leaves
- For Grass
- Locate the four longest green grass shoots.
- Mark the base of each grass shoot.
- Every Visit
- Determine dominant color for each leaf or grass
shoot - Or report either
- Snow Covered or Fallen
12Enter Data on the GLOBE Web Site Green-Up and
Green-Down Study Site Definition
Step 1 Select Define a Green-Up/Green-Down
Study Site from the Phenology data entry
menu Step 2 Enter the Study Site
information Step 3 Click Send Data button Step
4 Confirm data entries on verification page
13Enter Data on the GLOBE Web SiteGreen-Down
Protocol
Step 1 Confirm that a Green-Down Study Site has
been defined Step 2 Select Green-Down from the
Phenology data entry menu Step 3 Select your
Study Site, enter the date and growing season
cycle Step 4 Enter data for the status and color
of the leaves from each line of the data sheet,
one at a time Step 5 Confirm data entries on
verification page
14Looking at the Data
Leaf 1
Comparison of Green-Down Data of Two Species
Worthen C of E Primary School, Shropshire,
United Kingdom
Leaf 2
How does the green-down differ between species?
Leaf 3
Leaf 4
15Classroom Implementation
- Inquiry
- Curriculum/Standards Alignment
- Assessment
- Classroom Management
16Getting Started
- The GLOBE Web site has information
- http//www.globe.gov
- GLOBE Help Desk or your Country Coordinator can
support you as you get started. - Get your students involved doing real science!