IPCC: It is very likely that the global warming of 4 °C to 7 °C since the Last
Glacial Maximum occurred at an average rate about 10 times slower than the warming of the 20th century.
However, going back several centuries and reconstructing the entire process of glacier shrinkage from the «little ice age» — the last
glacial maximum occurred in this part of the Andes between the 17th and 18th centuries — Andean glaciers began to retreat around AD1730 - 50.
Not exact matches
In terms of the comments about the Holocene record, etc, and Gavin's saying that there is «no evidence» of such methane burps then: first, let us all also acknowledge that some of the world's major paleoclimate and methane experts HAVE seen evidence of exactly that [i.e., Nisbet, Have sudden large releases of methane from geological reservoirs
occurred since the Last
Glacial Maximum, and could such releases
occur again?
These reconstructions resolve the warming from the last
glacial maximum, the occurrence of mid-Holocene warm period, a MWP and LIA, and the rapid warming of the 20th century, all
occurring at times consistent with a broad array of paleoclimatic proxy data.
Here, we review terrestrial evidence for changes in ice geometry that
occurred in the Ross Sea sector of Antarctica at the Last
Glacial Maximum (LGM) and during subsequent deglaciation.
During the Last
Glacial Maximum, δ13Catm and atmospheric CO2 concentration were essentially constant, which suggests that the carbon cycle was in dynamic equilibrium and that the net transfer of carbon to the deep ocean had
occurred before then.