- Main Tower
- View of Main Tower through a canopy gap
- Main Tower from the air
- Main Tower
- Main Tower in winter
- Holly on top of the Main Tower
- View of the Howland forest canopy from the top of the Main Tower
- Cloudy skies over the tower wind guage
- Sonic anemometer
- Webcam on Main Tower
- Instrumentation on the tower
- Instrumentation secured to the Main Tower for data collection
- Howland Forest canopy
- Instrument buildings at the Main Tower site (tower behind)
- Picarro analyzers in the Main instrument building
- Data loggers at Main tower building
- Instruments in Main tower building
- East Tower from the path
- East Tower
- Sonic, intake, Tair, net rad on the East Tower
- West Tower from helicopter
- West Tower
- West Tower
- Solar radiation instruments on the West Tower
- Sonic and irga on top of West Tower
- “Swamp shack” by the West Tower
- Instruments and computer in shed at West Tower
- View of Howland from the skies
- Helicopter taking off
- Helicopter nitrogen application
- John atop the Main Tower
- Dave coring a tree
- Dave helps dig a soil pit
- Holly in the swamp
- Julie performs nutrient analysis
- Bob safely climbing a tower
- Holly sitting at the base of a large white pine
- Holly adjusting instrumentation
- Debjani and Lio
- Holly and Kathleen by soil respiration autochamber
- Researchers enjoy lunch in the forest
- Aaron and Olivia take a break from vegetation mapping
- Howland Cooperators Meeting 2008
- Howland Retreat 2016
- John and Holly at Howland
- Holly at the top of main tower
- Carbon trapping
- Soil respiration autochambers
- Soil respiration autochambers at the Main Tower site
- Soil moisture sensors
- Young moose on Seed Orchard Rd
- Hollow down woody debris
- Forest at Howland
- Recent contributions of deadwood to the soil carbon pool
- NASA plot established in 1989
- Winter day at Howland
- Canopy cover in the NASA plot (fisheye photo)
- Map of Howland tower sites
- Stem map of the NASA plot. Each circle represents one tree, each color a species