How much of the forest sink is passive? Case of the United States

• 成果类型: Article
• 署名作者: Davis, Eric C.; Sohngen, Brent; Lewis, David J.
• 署名单位: United States Department of Agriculture (USDA); University System of Ohio; Ohio State University; Oregon State University
• 刊物名称: PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
• ISSN/ISSBN: 0027-8424; 1091-6490
• DOI: 10.1073/pnas.2513588123
• 发表日期: 2026-01-27
• 页码: 2513588123
• 关键词: passive carbon; Forest management; attribution; carbon fertilization; climate impact; ATMOSPHERIC CARBON-DIOXIDE; land-use; CLIMATE-CHANGE; pine; increase; impacts; co2; storage; GROWTH; ecosystems

摘要

Over time, carbon sequestered in temperate forests has increased, but the relative effects of passive and active drivers remain unclear. This study uses plot-level data to disentangle the contributions of six drivers (temperature, precipitation, CO2, management, age composition, and area) to these increases in 14 forest groups of the conterminous United States. From 2005 to 2022, the passive drivers (CO2, temperature, and precipicontributing most of the change. Among the anthropogenic drivers, declining forest Changes in age composition, driven by both passive traits and anthropogenic choices, increased live tree C by 89 Tg C y-1. By quantifying the share of removals attributable to passive uptake, this approach enables nations with national forest inventories to better utilize their forests to meet net-zero requirements.