国別気候コミットメントへの整合性測定：京都・パリNDCサイクル向けギャップ・トゥ・ターゲット指標
Measuring alignment with national climate commitments: A gap-to-target indicator for Kyoto and Paris NDC cycles (原題)
Pengd-Wendé Richard Nikiema
🤖 gxceed AI 要約
日本語
各国の観測排出量をコミットメントが示す経路と比較する年次の「ギャップ・トゥ・ターゲット」指標を開発。京都第一約束期間の36カ国とパリNDC2サイクルの164カ国に適用した。土地利用会計や京都ユニット取引が整合性評価と順位を大きく左右し、NDC2では目標未達方向のギャップが増加。122カ国のうち19.7%が目標整合経路を下回る状態から上回る状態へ移行した。
English
The authors develop an annual Gap-to-Target indicator comparing observed GHG emissions with the pathway implied by each national commitment, applied to 36 countries in Kyoto CP1 and 164 countries across the first two Paris NDC cycles. Results show large heterogeneity: land-use accounting and Kyoto unit transactions materially shift measured alignment and rankings, and positive gaps are more prevalent under NDC2. Among 122 countries observed in both cycles, 19.7% moved from below to above their target-consistent pathway while only 4.9% moved the opposite way.
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
国別目標の算定・報告の一貫性を問う枠組みは、SSBJや有報での目標対比開示、日本のNDC進捗評価を投資家が読み解く際の参照軸になり得る。目標設計の差異が評価結果を左右する点は国内政策モニタリングにも示唆的。
In the global GX context
Directly relevant to global stocktake and NDC ratcheting debates under the Paris Agreement, offering a comparable metric across commitment cycles. It highlights how inconsistent target formulation, coverage, and accounting rules undermine cross-country comparability—an issue also central to ISSB/CSRD-aligned national disclosure.
👥 読者別の含意
🔬研究者:国別目標整合性を定量比較する指標設計と、目標アーキテクチャ・BAU仮定への感応度分析の手法を参考にできる。
🏢実務担当者:自社の国別目標対比での排出実績評価や、目標算定前提の差異が評価に与える影響の理解に活用できる。
🏛政策担当者:NDCの策定・算定・報告の一貫性向上が国際比較評価と効果的な気候政策に不可欠であることを示す。
📄 Abstract（原文）
Assessing whether observed emissions remain aligned with national commitments is central to evaluate international climate agreements. Yet consistent comparisons across countries and commitment cycles remain challenging because national targets differ in their formulation, coverage, and accounting rules. To address this gap, we develop an annual Gap-to-Target indicator that relates observed greenhouse gas emissions to the pathway implied by each national commitment. The indicator is applied to 36 countries during the first Kyoto commitment period and to 164 countries across the first two Paris NDC cycles. The results reveal substantial heterogeneity across countries and commitment cycles. Under Kyoto, land-use accounting and transactions in Kyoto units materially affect measured alignment and country rankings. Under the Paris Agreement, jointly considering target ambition and the Gap-to-Target identifies four ambition–alignment groups and clarifies how commitment stringency relates to countries’ positions. Positive gaps are more prevalent under NDC2. Among 122 countries observed in both cycles, 19.7% move from below to above their target-consistent pathways; only 4.9% move in the opposite direction, and 58.2% remain above in both cycles. Estimates also vary across target architectures and alternative BAU specifications. The framework provides an operational basis for tracking climate commitments and investigating the determinants of emissions alignment. The findings further suggest that greater consistency in the formulation, coverage, and reporting of national targets would strengthen comparative assessments and support more effectively targeted climate action.
🔗 Provenance — このレコードを発見したソース
- openalex https://doi.org/10.1016/j.indic.2026.101551first seen 2026-10-24 04:39:10 · last seen 2026-11-02 04:35:31
🔔 こうした論文の新着を逃したくない方は キーワードアラート に登録（無料・3キーワードまで）。
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。