Campus Carbon Emissions Inventory: Commuter Contributions and Campus-Land Offsets Paul Tanes...
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Transcript of Campus Carbon Emissions Inventory: Commuter Contributions and Campus-Land Offsets Paul Tanes...
Campus Carbon Emissions Inventory: Commuter Contributions and Campus-Land OffsetsPaul Tanes
[email protected] Boellstorff, Ph.D. [email protected] Department of GeographyBridgewater State College, Bridgewater, MA
• Public, primarily undergraduate – 10,000 students,
350 faculty• ACU Presidents
Climate Commitment (ACUPCC)– National initiative – Greenhouse gas
inventory, short term efforts and long term plans
– Service learning opportunities
Bridgewater State College (BSC) and ACUPCC
Clean Air-Cool Planet© (CA-CP) Calculator
• Purchased electricity, steam, and chilled water
• On-campus cogeneration plant
• On-campus stationary energy use
• Transportation: Fleet and air travel
• Student commuter habits • Faculty and staff commuter
habits • Agriculture • Solid Waste • Refrigeration and other
chemicals • Emission offsets
Commuting Profile at BSC
• 7000+ student commuters – 320+ towns in
Massachusetts and Rhode Island
– Average of 4.5 trips per week
• 3000+ summer student commuters
• 1400+ employees
Students
Faculty/Staff
CA-CP© Inputs for Commuter Habits
– Number of students– Average fuel efficiency– Percent commuting by car
– Miles per trip– Trips per day– Days per year
Miles Per Trip• Town hall locations to campus• Path determined by distance and
also by speed
Trips Per Day
1. Assume all students make same number of trips per week (4.5)?
2. Trips per week varies by distance – Using the known average:
– Where: • sc = # students within 25 miles of campus,
• sm = # students 25-50 miles of campus,
• sf = # students > 50 miles of campus
• xc trips for close students
• xm for medium-distance students
• xf for far students
A
fmc
s
xsxsxs )()()(5.4 321
Annual Commuter Contribution - Automobile• 54.2 million miles (113 round trips
to the moon) using 2.5 million gallons of gasoline
• 25,000 metric tons eCO2
– Or, the amount absorbed in a year by about 5500 acres of mature trees (24 campuses)
• Contributions not yet included– Commuter rail– College fleet– College-funded travel
Offsets
– Renewable energy credit
– Composting – Forest
preservation
Forest Preservation
Forest Preservation
Forest Preservation
• 97 acres of forest• 4.5 metric tons eCO2 per acre per
year• the campus forested land offsets
437 metric tons eCO2 per year– 1.7% of automobile commuting– Need about 5400+ acres of additional forest land
Next Steps
• Regarding future estimates: More detailed survey information on commuters
• The big picture will show where we stand• Short-term action and long-term goals• GIS students and service-learning
– Web-mapping applications– Improved campus land use inventories
• Clean Air-Cool Planet©, 2006. Conducting a campus greenhouse gas emissions inventory on your campus, including instructions and documentation for CA-CP Calculator v5.0
• Stavins, R. and K. Richards, 2005. The cost of U.S. forest-based carbon sequestration. Report for the Pew Center on Climate Change.
• Duke University, 2004. Greenhouse Gas Inventory.
• American College and University Presidents Climate Commitment, http://www.presidentsclimatecommitment.org/index.php
Resources