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Green-Down Protocol

This training session aims to provide an inquiry context for green-down data collection, accurate science content, review of data collection procedures, data entry and analysis, classroom implementation ideas, and collect feedback from participants.

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Green-Down Protocol

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  1. Green-Down Protocol

  2. Goals 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

  3. Inquiry 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?

  4. Local Inquiry Example

  5. Why 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

  6. Science 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

  7. Instruments: 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

  8. The 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

  9. Collecting 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

  10. Collecting 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

  11. . : : . : : Collecting 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

  12. Enter Data on the GLOBE Web SiteGreen-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

  13. Enter 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

  14. Looking 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

  15. Classroom Implementation • Inquiry • Curriculum/Standards Alignment • Assessment • Classroom Management

  16. Getting 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!

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