Arcata Community Forest Barnum Tract

Arcata, California

United States

Improved Forest Management

Technical details

The Barnum Tract is part of the Arcata Community Forest, which consists of 2,350 acres of second-growth redwood forest in Northern California's Humboldt County. Much of the community forest was logged during the 1880s. Coast redwoods, the world's tallest tree, can reach heights of 100 feet in their first 50 years (and a recorded maximum of 379 feet). So even the second-growth trees soar to impressive heights.

The City of Arcata purchased the Barnum Tract in 2003 from a timber company. At the time, the city determined that the tract was at high risk of intensive harvesting. The city now manages the forest to Forest Stewardship Council management standards. That improved management means that the entire community forest sequesters approximately 2,500 more metric tons of carbon dioxide a year than equivalent neighboring forests. That's the equivalent of taking 550 cars off the road each year. The forest receives no taxpayer dollars, so income from selling carbon offsets is crucial for paying the expenses of managing the forest and keeping it open for recreational uses.

A carbon offset represents the reduction of 1 metric ton (2,205 pounds) of carbon dioxide emissions. That reduction can be accomplished in many ways. For example, a project might capture and store CO2 before it’s emitted or, as the Arcata Barnum Tract project does, absorb (sequester) CO2 from the atmosphere. Other projects might reduce the need for producing energy from fossil fuels by producing it from a clean, renewable source instead, or by decreasing energy use through improved efficiency.

Cloverly buys offsets that meet accepted standards for being real, measurable, verifiable, permanent, and additional. "Additional" means that the carbon savings would not have happened without the offset project and that the project would not have happened unless it got certified to sell carbon offsets. The Climate Action Reserve oversees verification of the Arcata Barnum Tract project. You can find verification documents at

Projects can produce many offsets during a year, depending on how many tons of carbon they avoid, offset, or sequester. So a project may appear more than once in the Cloverly portfolio. You can tell the year of the offset by the date in the web address for each project: "12-months-starting-[month]-[year]." For a list of all the projects in our portfolio and an interactive map, see

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Instrument Type

Carbon Offset