Global S&T Development Trend Analysis Platform of Resources and Environment
Ozone layer recovery could be delayed by a rise in a gas commonly used in paint strippers | |
admin | |
2017-06-28 | |
发布年 | 2017 |
语种 | 英语 |
国家 | 英国 |
领域 | 资源环境 |
正文(英文) | If recent and rapid increases in a gas commonly used as a paint stripper and in the food industry to decaffeinate coffee and tea continue, the recovery of the ozone hole could be delayed by up to 30 years, say researchers. Antarctic ozone hole: 1979 to 2008 Their findings, published this week in the scientific journal Nature Communications, suggest that a previously ignored chemical called dichloromethane, not controlled by the Montreal Protocol, may now be contributing to ozone depletion and should be considered to improve future predictions of ozone recovery. The Montreal Protocol is heralded by many as one of the most successful international agreements ever. Introduced in 1987, the agreement followed many decades of monitoring of the ozone hole over Antarctica by researchers at NERC's British Antarctic Survey. The agreement led to the regulation of emissions of ozone-depleting gases, after which stratospheric ozone began to recover. The ozone hole, which is largest around October every year, is projected to return to pre-1980 levels in the second-half of this century, and fully recover sometime between 2046 and 2057. Lead author of the study, Dr Ryan Hossaini of Lancaster University, who is funded by NERC, said:
Dr Hossaini and colleagues used sophisticated computer models of the atmosphere to show that the gas's effect on ozone has increased significantly in recent years. They also analysed measurements of dichloromethane in the atmosphere over the past two decades, provided by scientists from the National Oceanic & Atmospheric Administration (NOAA) in the United States. Study co-author Dr Stephen Montzka from NOAA said:
The researchers projections show that continued dichloromethane increases at the average trend seen from 2004 to 2014 would delay ozone recovery over Antarctica by 30 years. If dichloromethane concentrations stay at current levels, the delay in recovery would be only five years. Although the future trajectory of dichloromethane is uncertain, without any regulations on emissions, it is likely concentrations will fall somewhere in between these ranges. The ozone layer shields Earth's surface from certain wavelengths of harmful solar ultraviolet radiation that would otherwise be detrimental to human, animal and plant health. Ozone also absorbs terrestrial infrared radiation and changes in its abundance can influence climate. A NERC-commissioned analysis in 2015 found that NERC's ozone research has spared thousands of lives and led to lower food prices, leading to savings of £1·3 billion every year for the UK, thanks to the early implementation of the Montreal Protocol. The analysis estimated that, had NERC-funded scientists at NERC's British Antarctic Survey not reported their discovery of a hole in the ozone layer in 1985, its discovery might have been delayed by five to ten years. By 2030, the cost of this delay would have resulted in 300 more skin cancer cases every year in the UK, costing the country around £550 million a year in today's money. The analysis, by Deloitte, estimates the discovery also led to avoided losses in farm production worth up to £740 million a year. NERC's Associate Director of Research, Dr Ned Garnett, said:
Further informationTamera Jones Notes1. NERC is the UK's main agency for funding and managing research, training and knowledge exchange in the environmental sciences. Our work covers the full range of atmospheric, Earth, biological, terrestrial and aquatic science, from the deep oceans to the upper atmosphere and from the poles to the equator. We coordinate some of the world's most exciting research projects, tackling major issues such as climate change, environmental influences on human health, the genetic make-up of life on Earth, and much more. NERC is a non-departmental public body. We receive around £330 million of annual funding from the Department for Business, Energy & Industrial Strategy (BEIS). |
URL | 查看原文 |
来源平台 | Natural Environment Research Council |
文献类型 | 新闻 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/103784 |
专题 | 资源环境科学 |
推荐引用方式 GB/T 7714 | admin. Ozone layer recovery could be delayed by a rise in a gas commonly used in paint strippers. 2017. |
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