Research press release


Nature Communications

Environmental health: Cleaner marine fuels may reduce associated childhood asthma



今回、James Corbettたちの研究グループは、2020年に船舶用燃料の硫黄分の規制値が引き下げられることによる地域住民の健康に対する利益と気候に対する影響を全球レベルで評価した。Corbettたちは、高分解能の排出物目録、統合大気モデル、および健康に関するリスク関数を組み合わせて、クリーンな燃料の使用によって全世界の船舶関連の若年死症例が年間403,300例から266,300例へ減少する(34%減)という予測を示している。また、船舶による大気汚染に関連した小児喘息の症例数も年間1400万例から640万例へ減少する(54%減)と予測している。


Cleaner, lower-sulphur fuels for ships will halve the number of childhood asthma cases associated with ship air pollution, suggests a new analysis in Nature Communications. However, this comes with trade-offs for climate change as the reduction in aerosols removes the radiative cooling effect they have, suggesting that air-pollution and climate-mitigation policies should go hand in hand.

Ships emit sulphate aerosols, which are detrimental for human health and terrestrial and aquatic environments. At the same time these aerosols also cool the climate through their radiative effects. The International Maritime Organization has proposed to reduce the sulphur content of fuel oils used in shipping to 0.5% by 2020. This should result in increased health benefits, but will also reduce the radiative cooling from ship emissions.

James Corbett and colleagues present a global assessment of the regional health benefits and climate consequences of implementing lower-sulphur standards for marine fuels in 2020. The authors combine high resolution emissions inventories, integrated atmospheric models and health risk functions and find that cleaner fuels will reduce ship-related premature mortality by 34% to 266,300 cases per year from 403,300, globally. Childhood asthma associated with ship air pollution will be reduced by 54% from 14 million cases annually to 6.4 million.

However, the positive health impacts of cleaner fuel standards are accompanied by 80% reduction in radiative cooling of aerosols. Therefore, the authors suggest, international policy efforts should jointly consider reduction of greenhouse gases and air pollution.

doi: 10.1038/s41467-017-02774-9

「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。