Research press release





今回、Sunyoung Park、Matt Rigbyたちの研究グループは、韓国済州島Gosanと沖縄県八重山郡竹富町波照間での大気観測の結果を、全球モニタリングデータおよび大気化学輸送モデルと組み合わせて、増加の原因を調べた。著者たちは、2014~2017年の中国東部からのCFC-11排出量が、2008~2012年と比べて年間約700万キログラム増加したと報告しており、主たる排出量増加の源を中国北東部の山東省と河北省付近とし、排出の原因は未報告の新規製造と使用である可能性が非常に高いとしている。


Emissions from eastern mainland China account for at least 40-60% of the global rise in trichlorofluoromethane (CFC-11) emissions since 2013, according to a study published in Nature this week. This rise is likely to be the result of new production and use, which is contrary to the Montreal Protocol agreement to globally phase out CFC production by 2010.

The concentration of CFC-11 in the atmosphere has declined substantially since the mid-1990s. However, last year it was reported that there has been a slowdown in this decline since 2012. It was suggested that global CFC-11 emissions have increased, but the locations of the sources responsible for this rise had not been identified.

Sunyoung Park, Matt Rigby and colleagues combined atmospheric observations from Gosan, South Korea, and Hateruma, Japan, with global monitoring data and atmospheric chemical transport models to investigate the source of the increase. The authors report that CFC-11 emissions from eastern mainland China were approximately 7,000,000 kilograms per year higher between 2014 and 2017 than 2008-2012. They show that the increase in emissions arises primarily around the northeastern provinces of Shandong and Hebei, and that these emissions are probably the result of new, unreported production and use.

Further investigations will be needed to determine the processes that have led to the increase and the magnitude of any associated CFC-11 production.

doi: 10.1038/s41586-019-1193-4

「Nature 関連誌注目のハイライト」は、ネイチャー広報部門が報道関係者向けに作成したリリースを翻訳したものです。より正確かつ詳細な情報が必要な場合には、必ず原著論文をご覧ください。

メールマガジンリストの「Nature 関連誌今週のハイライト」にチェックをいれていただきますと、毎週最新のNature 関連誌のハイライトを皆様にお届けいたします。