In the carbon cycle, it's not just about the individual tree-the entire forest plays a role. Leaves take in carbon dioxide, converting it to sugar, which is carbon-based. Some of the sugar is used immediately for energy, converted back to CO2, and released into the atmosphere. The rest is stored in living wood or dead matter, such as fallen leaves and branches. Old-growth forests, in particular, store vast amounts of carbon while continuing to absorb CO2. More
A Douglas fir forest near the Marys River in Oregon serves as a site for carbon research.
These core samples from Oregon’s 2002 Biscuit Fire, the biggest in the state’s history, provide scientists with valuable data on tree density, age, and growth rates. Scott Jackson
A fir tree is tagged so that its diameter can be measured.Scott Jackson
Kent Davis, a research assistant at Oregon State University, shins up an eddy flux tower to check on instruments that measure the flow of carbon dioxide and water vapor through the forest.Scott Jackson
Measuring the rate of carbon dioxide entering and leaving a leaf.Scott Jackson
High-tech wizard: In her laboratory at Oregon State University, Bev Law’s equipment includes a LiCor 6400 infrared gas analyzer, a device that measures the flow of carbon dioxide into and out of the soil.Scott Jackson
Air samples from different heights in the forest canopy will be sent to the University of Utah for analysis.Scott Jackson
A sonic anemometer measures wind speed from three different directions.Scott Jackson