How cold was the Last Glacial Maximum?

Other

Scientific paper

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

17

Biogeosciences: Climate Dynamics (1620), Biogeosciences: Paleoclimatology And Paleoceanography (3344, 4900), Global Change: Earth System Modeling (1225)

Scientific paper

We present a new approach to estimate the magnitude of global-mean cooling (dTLGM) at the Last Glacial Maximum (LGM) relative to the pre-industrial climate, by combining an ensemble of coupled climate model simulations with empirical constraints on regional cooling inferred from proxy data. We have generated a large ensemble of paired runs (~100) for pre-industrial and LGM boundary conditions with different versions of the same climate model of intermediate complexity. The model ensemble covers a broad range of climate sensitivities and produces a similarly broad range of dTLGM (4.3-9.8°C). Using reconstructed tropical SST cooling, we constrain the range of dTLGM to 5.8 +/- 1.4°C, which is corroborated by proxy data from other regions. This cooling is considerably larger than most estimates of previous LGM simulations. The reason is that most models did not account for the effect of atmospheric dust content and vegetation changes, which yield an additional 1.0-1.7°C global cooling.

No associations

LandOfFree

Say what you really think

Search LandOfFree.com for scientists and scientific papers. Rate them and share your experience with other people.

Rating

How cold was the Last Glacial Maximum? does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with How cold was the Last Glacial Maximum?, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and How cold was the Last Glacial Maximum? will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFWR-SCP-O-1791993

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.