Hausmann Henry, Cai Qixiang, Zeng Ning
Department of Atmospheric and Oceanic Science and Earth Systems Science Interdisciplinary Center, University of Maryland, College Park, MD, USA.
Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing, China.
Carbon Balance Manag. 2024 Sep 28;19(1):34. doi: 10.1186/s13021-024-00270-4.
Wood Harvesting and Storage (WHS) is a form of Biomass Carbon Removal and Storage (BiCRS) that utilizes a combined natural and engineered process to harvest woody biomass and put it into long term storage, most frequently in the form of subterranean burial. This paper aims to quantify the availability of woody biomass for the purposes of WHS in the continental United States using a carbon cycle modeling approach. Using a regional version of the VEGAS terrestrial carbon cycle model at 10 km resolution, this paper calculates the annual woody net primary production in the continental United States. It then applies a series of constraints to exclude woody biomass that is unavailable for WHS. These constraints include fine woody biomass, current land use, current wood utilization, land conservation, and topographical limitations. These results were then split into state by state and regional totals.
In total, the model projects the continental United States could produce 1,274 MtCOe (CO equivalent) worth of coarse woody biomass annually in a scenario with no anthropogenic land use or constraints. In a scenario with anthropogenic land use and constraints on wood availability, the model projects that 415 MtCOe of coarse woody biomass is available for WHS annually. This is enough to offset 8.5% of the United States' 2020 greenhouse gas emissions. Of this potential, 20 MtCOe is from the Pacific region, 77 MtCOe is from the Western Interior, 91 MtCOe is from the Northeast region, and 228 MtCOe is from the Southeast region.
There is enough coarse woody biomass available in the continental United States to make WHS a viable form of carbon removal and storage in the country. There is coarse woody biomass available across the continental United States. All four primary regions analyzed have enough coarse woody biomass available to justify investment in WHS projects.
木材采伐与储存（WHS）是生物质碳去除与储存（BiCRS）的一种形式，它利用自然与工程相结合的过程来采伐木质生物质并将其长期储存，最常见的形式是地下掩埋。本文旨在使用碳循环建模方法，量化美国大陆用于WHS目的的木质生物质的可利用量。本文使用分辨率为10公里的区域版VEGAS陆地碳循环模型，计算了美国大陆的年度木质净初级生产力。然后应用一系列限制条件，排除无法用于WHS的木质生物质。这些限制条件包括细木质生物质、当前土地利用、当前木材利用、土地保护和地形限制。然后将这些结果按州和地区总计进行划分。
总体而言，该模型预测，在没有人为土地利用或限制的情况下，美国大陆每年可生产价值1274 MtCOe（碳当量）的粗木质生物质。在有人为土地利用和木材可用性限制的情况下，该模型预测每年有415 MtCOe的粗木质生物质可用于WHS。这足以抵消美国2020年温室气体排放量的8.5%。在这一潜力中，20 MtCOe来自太平洋地区，77 MtCOe来自西部内陆，91 MtCOe来自东北地区，228 MtCOe来自东南地区。
美国大陆有足够的粗木质生物质，使WHS成为该国可行的碳去除与储存形式。美国大陆各地都有粗木质生物质。所分析的所有四个主要地区都有足够的粗木质生物质，足以证明对WHS项目进行投资是合理的。
