Long term trends of Arctic surface temperature and its possible causality over the last 100 years

The rapid warming of Arctic surface temperature has exceeded the global surface temperature in recent decades. However, the long term underlying process and its causality of the warming conditions still remain uncertain according to the state-of-the-art. In this paper, we explored the underlying variations of the Arctic mean surface temperature anomalies (AMTA) using a piecewise linear trend model from 1920 to 2018.