Climate Trends二酸化炭素（CO₂）の世界平均濃度の推移
最新の月427.62 ppm2026年6月
1年前との差+1.72 ppm
1979年との比×1.261979→2025
増加が最大の年2024+3.44 ppm
年ごとの増加量
+1.60 ppm
+2.02 ppm
+2.56 ppm
+1.81 ppm
+2.04 ppm
+2.17 ppm
+1.75 ppm
+2.12 ppm
+1.48 ppm
+2.26 ppm
+1.87 ppm
+2.03 ppm
+2.75 ppm
+1.95 ppm
+2.31 ppm
+3.42 ppm
+2.15 ppm
+2.39 ppm
+2.46 ppm
+2.37 ppm
+2.26 ppm
+2.38 ppm
+2.27 ppm
+3.44 ppm
+2.83 ppm
年平均
| 年 | 年平均 | 前年差 |
|---|---|---|
| 2025 | 425.62 ppm | +2.83 |
| 2024 | 422.79 ppm | +3.44 |
| 2023 | 419.35 ppm | +2.27 |
| 2022 | 417.08 ppm | +2.38 |
| 2021 | 414.70 ppm | +2.26 |
| 2020 | 412.44 ppm | +2.37 |
| 2019 | 410.07 ppm | +2.46 |
| 2018 | 407.61 ppm | +2.39 |
| 2017 | 405.22 ppm | +2.15 |
| 2016 | 403.07 ppm | +3.42 |
| 2015 | 399.65 ppm | +2.31 |
| 2014 | 397.34 ppm | +1.95 |
| 2013 | 395.40 ppm | +2.75 |
| 2012 | 392.65 ppm | +2.03 |
| 2011 | 390.62 ppm | +1.87 |
| 2010 | 388.76 ppm | +2.26 |
| 2009 | 386.50 ppm | +1.48 |
| 2008 | 385.02 ppm | +2.12 |
| 2007 | 382.90 ppm | +1.75 |
| 2006 | 381.15 ppm | +2.17 |
| 2005 | 378.98 ppm | +2.04 |
| 2004 | 376.94 ppm | +1.81 |
| 2003 | 375.14 ppm | +2.56 |
| 2002 | 372.58 ppm | +2.02 |
| 2001 | 370.57 ppm | +1.60 |
| 2000 | 368.96 ppm | +1.17 |
| 1999 | 367.79 ppm | +2.10 |
| 1998 | 365.70 ppm | +2.66 |
| 1997 | 363.04 ppm | +1.10 |
| 1996 | 361.93 ppm | +1.76 |
| 1995 | 360.18 ppm | +1.85 |
| 1994 | 358.33 ppm | +1.49 |
| 1993 | 356.84 ppm | +0.74 |
| 1992 | 356.09 ppm | +0.70 |
| 1991 | 355.40 ppm | +1.34 |
| 1990 | 354.06 ppm | +1.27 |
| 1989 | 352.79 ppm | +1.63 |
| 1988 | 351.16 ppm | +2.48 |
| 1987 | 348.68 ppm | +1.71 |
| 1986 | 346.97 ppm | +1.43 |
| 1985 | 345.54 ppm | +1.46 |
| 1984 | 344.07 ppm | +1.54 |
| 1983 | 342.53 ppm | +1.67 |
| 1982 | 340.86 ppm | +0.75 |
| 1981 | 340.11 ppm | +1.19 |
| 1980 | 338.91 ppm | +2.06 |
| 1979 | 336.85 ppm | – |
NOAA GML の世界平均（海洋上の観測点のネットワーク）の月平均値。速報値は後から改訂されることがあります。