碳排放引发的全球暖化持续导致极地冰融,在均温不断上升的状况下,影响层面相当广泛。
最新一份研究报告显示,若北美洲永久冻土持续融化,多种有毒物质将排放北美洲主要水系“育空河流域”,使其中孕育的水产均无法食用,影响相当严重。
综合外媒报道,最新发表在学术期刊《自然通讯》的研究指出,若按当前的碳排放速度计算,育空河流域的永久冻土将融化至一定程度,导致土壤中原本冰封的有毒物质释放至河中,进而影响河内生物,使其死亡或不适宜人类食用。
研究人员发现,永久冻土一旦融化,会有大量水银注入育空河流域,使当地鱼虾蟹的水银含量在2050年超出联邦安全准则,到了世纪末更会增加逾1倍,届时这条贯穿北美的主要河系,其中所产水生生物恐不再适宜人类食用。
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