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北溪天然气估3天内漏尽　等于1年100万辆汽车排放量

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责任编辑: 国际小编

（莫斯科30日综合电）俄罗斯从波罗的海连接至德国的北溪1、2号天然气管线疑因爆炸导致外泄。

这起事件可能成为史上最大单一甲烷外泄事故，最严重情况相当于一年100万辆汽车的排放量，但有专家认为，应该不致对气候变迁造成重大影响。

据估计，管内的天然气可能将在本周耗尽；此次泄漏将可能向大气中释放50万吨的甲烷，进而加剧气候变暖。

位于瑞典经济区的波罗的海，发生北溪2号天然气管泄漏事故。（法新社）

根据丹麦政府提供的官方最坏情况的估计，此次约有7.78亿立方公尺天然气泄漏。丹麦能源署9月28日表示，一半以上的天然气已经从受损管道中流出，而预计剩余的天然气将在10月2日流尽。

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天然气的主要成分是强效温室气体甲烷。据报道，从受损的北溪管道中释放的甲烷将可能是迄今为止有记录以来的最大一次甲烷泄漏。

丹麦能源署署长表示，“北溪-1”和“北溪-2”管道的泄漏点所产生的排放量约占丹麦每年二氧化碳排放量的32%。此外，估计泄漏排放的甲烷可能是美国阿利索峡谷天然气泄漏量的2至5倍。2015年，美国发生阿利索峡谷天然气泄漏事件，导致约10万吨甲烷泄漏，是美国历史上最大的甲烷泄漏事件。

伦敦帝国理工学院化学工程系的保罗·巴尔科姆表示，目前海洋表面出现的甲烷气泡表明天然气仍“强烈向上流动”。“即使它只释放了其中的一小部分，也会对环境和气候产生非常大的影响。”

据了解，甲烷是仅次于二氧化碳的第二大温室气体，约占全球温室气体排放量的20%。在吸收太阳热量和使地球变暖方面，它的效果是二氧化碳的82.5倍。

文: 综合报导
图:法新社

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