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科学家发现会对臭氧层造成破坏的CFC-11的排放源

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编辑: 1   作者: cnbeta   时间: 2019/05/23 12:25/00  

去年一项研究报告显示,世界上某个地方至少有一个实体可能正在生产一种名为CFC-11的化学物质,这种物质因破坏大气臭氧层被禁止生产。科学家们已经发现,尽管2010年禁止使用CFC-11,但CFC-11排放量仍在上升,这表明它仍然在世界某个地方使用,但当时没有人可以明确指出其来源。

现在,一项新研究揭示了这些排放的可能来源。根据布里斯托大学的说法,国际科学家团队利用NOAA全球监测部门和AGAGE等全球监测网络,将排放源缩小到中国东部,特别是河北和山东省。

根据《蒙特利尔议定书》的规定,2010年开始逐步淘汰CFC-11的使用。然而,据去年的研究透露,CFC-11排放量在2013年左右开始增加,这减缓恢复大气臭氧层的进程。部分资料来源已经缩小到东亚的某个地方,但没有其他细节可供使用。

位于韩国的AGAGE站点以及日本NIES运营的附属站点帮助缩小了排放源。来自韩国庆北国立大学的Sunyoung Park教授解释说:

当空气从工业区到达时,我们的测量显示污染的“高峰”。对于CFC-11,我们注意到2012年之后这些峰值的幅度增加,表明该区域的某些地方的排放量必须增加。

最终,世界各地的科学家们共同努力确定2012年以后中国东部地区的CFC-11排放量每年增加约7000吨,其中主要来自河北和山东。根据公告,这些网络监测的其他国家没有证实任何增加的CFC-11排放量。而所有迹象都表明新的生产推动了CFC-11排放量的增加,但需要额外的工作来确定哪些行业正在产生CFC-11排放。