The Holocene Thermal Maximum
The timing, dynamics, and cause of the Holocene Thermal Maximum in the Arctic
Project Methods
We compiled a database of published and unpublished records of Holocene
paleoenvironmental change in the Arctic from the western Arctic. The database has:
-
140 sites
-
data from a variety of sources (lake and, marine sediments, peat, and glacier ice)
-
data from a variety of proxies (pollen, macrofossils, chironomids, diatoms, geochemistry, oxygen isotopes, etc.)
-
identifications of the initiation and termination of the thermal maximum as it was either explicitly stated by the original author, or interpreted from that author's data by a project contributor.
-
timing of the peak warmth, intensity of warmth, or effective moisture change where explicitly stated by the original author.
-
14C ages calibrated using a third-order polynomial fit to intcal98 dataset, which yields estimates within ~150 years of the calibrated age.