Polar amplication is
of global concern due to the potential effects
of future warming on
ice sheet stability and, therefore, global sea level (see Sections 5.6.1, 5.8.1 and Chapter 13) and carbon cycle feedbacks such as those linked with permafrost melting (see Chapter 6)... The magnitude
of polar amplification depends on the relative strength and duration
of different climate feedbacks, which determine the transient and equilibrium
response to external forcings.
Rather, it both offers a tool for exploring the sea level implications
of polar ice sheets» complex physical
responses to global warming and highlights the deep uncertainty that characterizes sea level change in a high - emissions future.