2.warming oceans are a warning of the chaos ahead

Climate models have always allowed for uncertainty. For decades, scientists have been certain of the direction of travel: towards increased heat, risk and instability. But how precisely the crisis would manifest, in what order systems would break down, and how the knock-on effects would unfold, remains a subject for research and discussion. Currently, there is a debate between experts about whether the pace of global heating is accelerating or stable. The likelihood of vital ocean currents, known as the Atlantic meridional overturning circulation, collapsing this century is also contested. One new study has suggested that a tipping point could be approaching, and that the analysis of the Intergovernmental Panel on Climate Change has, in this respect, been too conservative.

have always  一直都      ；  uncertainty  不确定   ；   instability  不稳定性   ；precisely  精确地  ；   manifest  v.显示  ；   break down  崩溃，分解  ；   unfold v.展开  ，展现出来 ；   

pace  n.速度  ；    accelerating  v. 加速    ；  stable  adj.稳定的    ；likelihood  n.可能性 

vital adj.至关重要的  ； current  n.水流，洋流   ；Atlantic n.大西洋 ；  overturn  v.推翻  

circulation   n.循环，流通  ；  collapse  v.倒塌，崩溃   ;  contest  v.争论，竞争  ，suggest v.表明   ；  tipping point  n.临界点  ；  analysis  n.分析   ；   panel  n.专家小组  ;  in this respect  在这个方面   conservative adj.保守的