▲加拿大艾伯塔省(Alberta)的野火情况。
加拿大各地野火持续延烧,13日累计上百起火灾,不仅迫使数千人撤离,铁路在部分地区暂停服务,浓浓烟雾也往南飘到美国境内,威斯康辛州、明尼苏达州、爱荷华州都发布了空气品质警报。
CNN报导,截至13日,加拿大各地发生超过100起火灾,其中39处更被认为火势失控,极端干燥的天气,加上时速25英里(约时速40公里)的阵风,预计将在未来几天加剧情况。
东部曼尼托巴省(Manitoba)逾8.6万英亩(近3.5万公顷)土地被毁,该省野火管理局局长西蒙斯(Earl
Simmons)坦言,「我从事野火工作40年,从没看过火势这样蔓延。」西部英属哥伦比亚省(British
Columbia)帕克湖火灾(Parker Lake
Fire)周末期间扩大至3倍、延烧面积达1.3万英亩(约5260公顷)。艾伯塔省(Alberta)野火蔓延超过1.6万英亩(近6500公顷)。
▲英属哥伦比亚省的帕克湖火灾(Parker Lake Fire)周末进一步蔓延。
加拿大环境部发布的空气品质警告范围,从英属哥伦比亚省到中部的萨斯克彻温省(Saskatchewan)。与此同时,美国威斯康辛州、明尼苏达州、爱荷华州13日的空气品质都达到「不健康」的程度,并且预计持续一整天,纷纷发布相关警报。
CNN报导,人类活动引发的气候变迁与暖化,为野火创造有利条件,而加拿大今年野火的远因,早在冬天与去年就种下。英属哥伦比亚省野火服务部门的火灾专家博格汉(Ben
Boghean)表示,「这个地区历经多年干旱,去年冬天的积雪又低于正常值,因此纳尔森堡(Fort
Nelson)的森林非常容易被新火势引燃,并且快速蔓延。」
加拿大环境部也指出,降雪减少、温度升高、干旱恶化等气候变迁指标,在该国各地引起更大规模、更猛烈的火灾,去年是加拿大有纪录以来最具破坏性的野火季,野火余烬冬季时被积雪埋住,在地下深处持续闷烧,等到春天气温升高时,再度被引燃,被称为「残余火灾」(holdover
fires)或「僵尸火灾」(zombie fires)。
-->
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