联合国环境规划署周三首次正式承认，将全球气温升幅控制在工业化前水平以上1.5°C以内的目标已不可行1。这一立场标志着国际气候政策的重大转变。2015年，全球几乎所有国家都同意为实现这一目标而努力1。
面对升温已接近或超过1.5°C的现实1，联合国环保规划署调整了策略方向。新的目标不再追求完全避免超过1.5°C的限值，而是转向最小化超过该阈值的时长和幅度1。要实现这一目标，全球需要在当下大幅削减排放，并在本世纪末之前从大气中移除数百吉吨的二氧化碳1。当前强劲的厄尔尼诺事件几乎肯定意味着全球气温已经突破了1.5°C这一里程碑1。
The United Nations Environment Programme made an unprecedented admission on Wednesday, acknowledging that the global community will overshoot the 1.5 degrees Celsius warming threshold above pre-industrial levels 1. The agency abandoned efforts to keep temperature rise below this benchmark, which nearly every nation committed to pursuing under the 2015 Paris Agreement 1.
Instead of attempting to prevent crossing the 1.5°C limit, the UN has recalibrated its approach to minimizing how long global temperatures remain above this threshold and how far they exceed it 1. Achieving this revised objective requires substantial immediate emissions reductions and the removal of hundreds of gigatons of carbon dioxide from the atmosphere by the end of this century 1. The shift in strategy reflects the current intensity of El Niño conditions, which make it nearly certain that the 1.5°C milestone has already been breached 1.
评论
还没有评论，欢迎留下第一条。