Original sentence: IPCC reports dispute the view that the LIA was prominent IPCC-TAR.Some versions of the reconstruction of the temperature record of the past 1000 years in the Northern Hemisphere  do not show a pronounced period of cooling.The IPCC describes the LIA as a modest cooling of the Northern Hemisphere during this period of less than 1°C, and says 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
Edited sentence: For example, some versions of the reconstruction of the temperature record of the past 1000 years in the northern hemisphere  do not show a pronounced period of cooling.It is now less clear that this is true based on evidence about past temperature trends from IPCC-TAR.It was initially believed that the LIA was a global phenomenon.Little Ice Age.Medieval Warm Period.The IPCC describes the LIA as a modest cooling of the Northern Hemisphere during this period of less than 1°C, and says current evidence does not support globally synchronous periods of anomalous cold or warmth over this timeframe, and the conventional terms of.appear to have limited utility in describing trends in hemispheric or global mean temperature changes in past centuries