Read here. As common sense science would surmise, the Antarctic region follows a natural cycle of cooling and warming. As the scientists have now found, new peer-research confirms these type of dominant Antarctic warming/cooling cycles - and human CO2 emissions are found not to be the relevant driving force.
"Historical records for the western Antarctic Peninsula (WAP) show that it is particularly prone to rapid climate change—change that occurs in cycles of ~200 years and ~2500 years.....ice in the Antarctic region undergoes periodic episodes of rapid melting—and it is all entirely natural, not because of human activity. The new paper echos these findings: “Paleo-records show that analogous climate variations have occurred in the past 200 to 300 years, and over longer 2500-year cycles, with rapid (decadal) transitions between warm and cool phases in the WAP."....."Their conclusion was that “variability of these parameters demonstrates the significance of both short-term cycles, which recur approximately every 200 yr, and longer term events (~2500 yr cycles) that are most likely related to global climatic fluctuations.”"
Additional climate history postings.