IPCC: “worst case scenarios are being realised”

Key Message 1: Climatic Trends

Recent observations confirm that, given high rates of
observed emissions, the worst-case IPCC scenario
trajectories (or even worse) are being realised. For many
key parameters, the climate system is already moving beyond
the patterns of natural variability within which our society
and economy have developed and thrived. These parameters
include global mean surface temperature, sea-level rise,
ocean and ice sheet dynamics, ocean acidification, and
extreme climatic events. There is a significant risk that
many of the trends will accelerate, leading to an increasing
risk of abrupt or irreversible climatic shifts.