Near-surface warming in the Arctic has been almost twice as large as the global average over the past few decades. The vertical structure of temperature change in this region during the late twentieth century is examined and evidence is found for temperature amplification well above the surface. The causes of this amplification aloft remain uncertain, as feedbacks associated with the recent reduction in snow and ice cover are unlikely to be the cause.
- Rune G. Graversen
- Thorsten Mauritsen
- Gunilla Svensson
