According to the agency, which runs the WMO World Data Centre for Greenhouse Gases on behalf of the World Meteorological Organization, the global average concentrations of carbon dioxide, methane and nitrous oxide each surpassed all previous observations ^[1].

Carbon dioxide reached 426.8 ppm, up 2.8 ppm from the previous year, methane reached 1,948 ppb, up 6 ppb, and nitrous oxide reached 339.1 ppb, up 1.1 ppb, the agency reported ^[1]. The agency also noted that, despite year-to-year ups and downs, the annual increases of carbon dioxide and nitrous oxide have been trending upward in recent years compared with the average pace since monitoring began in 1984 ^[1]. Over the most recent decade, CO2 rose by an average of 2.63 ppm a year and nitrous oxide by 1.08 ppb a year, both faster than their 41-year averages of 2.00 ppm and 0.87 ppb respectively, while methane's recent annual rise of 10.2 ppb also outpaced its long-term average of 7.1 ppb ^[1].

These findings appear in the WMO's Greenhouse Gas Bulletin No. 22, released on October 27, and are due to be reported at the COP31 climate conference in Antalya, Turkey, running November 9 to 20, where they will serve as reference data for international climate discussions ^[1]. The Japan Meteorological Agency has also published a Japanese-language summary translation of the bulletin for those who want the details without wading through the English original ^[1]. Readers wanting the full figures or background graphs can check the agency's linked data pages directly ^[1].

Source credit 出典：「世界の主要な温室効果ガス濃度は観測史上最高を更新」（気象庁）（https://www.jma.go.jp/jma/press/2610/27b/GHG_Bulletin_22.html）、PDL1.0（https://www.digital.go.jp/resources/open_data/public_data_license_v1.0）を加工してJapan News (j.apan.news)が作成 This article is Japan News's own English summary of the Japanese original. It has been translated and edited by Japan News; it is not an official translation, and the Japan Meteorological Agency did not write or review it.