العصر الجليدي الصغير
The TAR discusses "Was there a "Little Ice Age" and a "Medieval Warm Period"?" and says "Thus current evidence does not support globally synchronous periods of anomalous cold or warmth over this timeframe, and the conventional terms of "Little Ice Age" and "Medieval Warm Period" appear to have limited utility in describing trends in hemispheric or global mean temperature changes in past centuries."