{"id":67838,"date":"2024-05-03T12:20:46","date_gmt":"2024-05-03T17:20:46","guid":{"rendered":"https:\/\/olduvai.ca\/?p=67838"},"modified":"2024-05-03T12:20:46","modified_gmt":"2024-05-03T17:20:46","slug":"analysis-how-low-sulphur-shipping-rules-are-affecting-global-warming","status":"publish","type":"post","link":"https:\/\/olduvai.ca\/?p=67838","title":{"rendered":"Analysis: How low-sulphur shipping rules are affecting global warming"},"content":{"rendered":"
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Analysis: How low-sulphur shipping rules are affecting global warming<\/a><\/h3>\n<\/div>\n<\/div>\n<\/div>\n
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In 2020, international\u00a0regulations<\/a>\u00a0to reduce air pollution from shipping imposed strict limits on the sulphur content of marine fuels.<\/p>\n

The International Maritime Organization (IMO)<\/a>\u00a0rules have had some success in improving public health. Global emissions of sulphur dioxide (SO2) \u2013 a health-damaging air pollutant \u2013 have dropped by about 10% as a result.<\/p>\n

But the shift to low-sulphur shipping fuel has had an additional consequence.<\/p>\n

Sulphur particles contained in ships\u2019 exhaust fumes have been counteracting some of the warming coming from greenhouse gases. But lowering the sulphur content of marine fuel has weakened the masking effect, effectively giving a boost to warming.<\/p>\n

Some researchers have\u00a0proposed<\/a>\u00a0that the drop in SO2 as a result of the IMO\u2019s clean air regulations could be behind a recent\u00a0spike<\/a>\u00a0in global sea surface temperature.<\/p>\n

Carbon Brief analysis shows that the likely side-effect of the 2020 regulations to cut air pollution from shipping is to increase global temperatures by around 0.05C by 2050. This is equivalent to approximately two additional years of emissions.<\/p>\n

While this will contribute to warming and make it even more difficult to avoid exceeding\u00a01.5C<\/a>\u00a0in the coming decades, a number of other factors are likely contributing to the ocean heatwave.<\/p>\n

These include a\u00a0massive eruption<\/a>\u00a0of an underwater volcano in the south Pacific, an unusual absence of\u00a0Saharan dust<\/a>\u00a0and a\u00a0growing El Ni\u00f1o<\/a>.<\/p>\n

Phasing down<\/strong><\/p>\n

Nearly all SO2 emissions today are a by-product of fossil fuel combustion.<\/p>\n

Globally, SO2 emissions from marine fuel increased from around 6 million tonnes (MtSO2) per year in the 1970s to more than 10MtSO2 per year in the 2000s and 2010s.<\/p>\n

SO2 emissions from fossil fuels have long contributed to severe health impacts through the formation of particulate matter known as\u00a0PM2.5<\/a>.<\/p>\n

…click on the above link to read the rest of the article…<\/p>\n<\/div>\n<\/div>\n","protected":false},"excerpt":{"rendered":"

Analysis: How low-sulphur shipping rules are affecting global warming In 2020, international\u00a0regulations\u00a0to reduce air pollution from shipping imposed strict limits on the sulphur content of marine fuels. The International Maritime Organization (IMO)\u00a0rules have had some success in improving public health. Global emissions of sulphur dioxide (SO2) \u2013 a health-damaging air pollutant \u2013 have dropped by […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_monsterinsights_skip_tracking":false,"_monsterinsights_sitenote_active":false,"_monsterinsights_sitenote_note":"","_monsterinsights_sitenote_category":0,"footnotes":""},"categories":[3,4],"tags":[30093,369,386,34470,30091,4856],"class_list":["post-67838","post","type-post","status-publish","format-standard","hentry","category-energy-2","category-environment","tag-dr-zeke-hausfather","tag-global-warming","tag-greenhouse-gases","tag-low-sulphur-diesel","tag-prof-piers-forster","tag-shipping"],"_links":{"self":[{"href":"https:\/\/olduvai.ca\/index.php?rest_route=\/wp\/v2\/posts\/67838","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/olduvai.ca\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/olduvai.ca\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/olduvai.ca\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/olduvai.ca\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=67838"}],"version-history":[{"count":1,"href":"https:\/\/olduvai.ca\/index.php?rest_route=\/wp\/v2\/posts\/67838\/revisions"}],"predecessor-version":[{"id":67839,"href":"https:\/\/olduvai.ca\/index.php?rest_route=\/wp\/v2\/posts\/67838\/revisions\/67839"}],"wp:attachment":[{"href":"https:\/\/olduvai.ca\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=67838"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/olduvai.ca\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=67838"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/olduvai.ca\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=67838"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}