Significant Influence of Lateral Carbon Fluxes on Regional U.S. Carbon Budgets
横断的な炭素フラックスが米国地域の炭素収支に与える有意な影響 (AI 翻訳)
B. Byrne, J. Liu, G. Domke, S. Ogle, G. D. Ferreira, Y. Bar-On, H. Nesser, E. Bilir, A. A. Bloom, D. Hayes, B. Poulter, K. Bowman, K. Davis
🤖 gxceed AI 要約
日本語
この研究は、2015～2020年の米国本土7地域の炭素収支を構築し、横断的な炭素移動（伐採木材や河川炭素埋没）が地域の正味表面-大気CO2フラックスの解釈に大きく寄与することを示した。トップダウン推定とインベントリベースの炭素蓄積変化を一致させる上で、横断的フラックスを考慮することが重要である。
English
This study constructs regional carbon budgets for seven U.S. regions from 2015–2020, showing that lateral carbon fluxes (e.g., harvested wood, riverine burial) significantly impact the interpretation of net surface-atmosphere CO2 fluxes. Accounting for these fluxes improves consistency between top-down atmospheric inversions and inventory-based estimates by 31%.
Unofficial AI-generated summary based on the public title and abstract. Not an official translation.
📝 gxceed 編集解説 — Why this matters
日本のGX文脈において
米国地域を対象とするが、サブナショナルレベルでのインベントリと大気逆解析の整合手法を示しており、日本の温室効果ガスインベントリの精緻化やMRV（計測・報告・検証）の改善に応用可能な知見を提供する。
In the global GX context
This paper provides a roadmap for reconciling top-down and bottom-up carbon budgets at sub-national scales, which is crucial for the MRV framework under the Paris Agreement and for improving national greenhouse gas inventories globally.
👥 読者別の含意
🔬研究者:This study offers a methodological framework for integrating lateral carbon fluxes into regional carbon budget reconciliation, useful for carbon cycle modelers and inventory scientists.
🏢実務担当者:National inventory compilers can apply the approach to reconcile atmospheric observations with inventory-based estimates, enhancing the accuracy of carbon accounting.
🏛政策担当者:The paper informs MRV best practices by demonstrating how to incorporate lateral carbon flows, which is relevant for countries developing sub-national carbon budgets.
📄 Abstract（原文）
Observations of atmospheric carbon dioxide (CO2) are expected to play a critical role in monitoring, reporting, and verification designed to track progress toward the reduction goals of greenhouse gas emissions. In this study, we construct a comprehensive regional carbon budget for seven National Climate Assessment regions of the contiguous United States (CONUS) over 2015–2020. We demonstrate that lateral carbon movement across regions, along with their resulting endpoint CO2 emissions, represent a major contributor to the interpretation of regional net surface‐atmosphere fluxes of CO2. When accounting for lateral carbon fluxes, “top‐down” flux estimates from v10 Orbiting Carbon Observatory 2 (OCO‐2) Modeling Intercomparison Project (MIP) agree, within uncertainty, with inventory‐based carbon stock change estimates in six out of seven National Climate Assessment regions ‐ except for the Southwest. The total net carbon exchange from the top down is 925 ± 339 Tg carbon per year (Tg C/year), consistent with the 974 Tg C/year estimate from the inventory. Notably, lateral carbon flows in the form of harvested wood products and riverine carbon burial are responsible for an estimated 16% of the total carbon stock changes occurring across CONUS. Averaged over the seven regions, accounting for lateral transport and their endpoint carbon emissions improves the consistency between inventory and top‐down estimates by 31%. Our study presents a roadmap for reconciling the inventories and top‐down atmospheric inversions at sub‐national scale and highlights the importance of accurate representation of lateral carbon flows for using top‐down estimates with national inventories.
🔗 Provenance — このレコードを発見したソース
- semanticscholar https://doi.org/10.1029/2025gb009020first seen 2026-05-06 00:47:39
gxceed は公開メタデータに基づく研究支援データセットです。要約・翻訳・解説は AI 支援で生成されています。 最終的な解釈・検証は利用者が原典資料に基づいて行うことを前提とします。