The research drew lessons from paleoclimate studies of the Last Glacial Maximum, the cold peak of the last ice age, that relate to the extent of warmth possible in an era of accumulating greenhouse gases: (dotearth.blogs.nytimes.com)
However, the separation of char from soot has rarely been applied in paleoclimate studies using sediment analysis, much less in investigations of long - term records of paleo - fires. (giss.nasa.gov)
The finding that the last century has seen an exceptional rise in global temperatures at the same time that physics indicates that extra energy is being retained by the rising CO2 is common to many paleoclimate studies. (wattsupwiththat.com)