Reconstruction of climate and ecology of Skagit Valley, Washington, from 27.7 to 19.8 ka based on plant and beetle macrofossils, 2021

The last glacial maximum (LGM) represents an extreme state of climate from 26.5 to 19 cal ka BP, when Northern Hemisphere solar insolation and CO2 levels in the atmosphere were low, global mean temperature was 4 ± 0.8°C cooler than today, and continental glaciers were near their maximum extents

Reconstruction of climate and ecology of Skagit Valley, Washington, from 27.7 to 19.8 ka based on plant and beetle macrofossils, 2021

by Jon L. Riedel , Alice Telkab, Andy Bunnc and John J. Clagued

Glacial lake sediments exposed at two sites in Skagit Valley, Washington, encase abundant macrofossils dating from 27.7 to 19.8 cal ka BP. At
the last glacial maximum (LGM) most of the valley floor was part of a regionally extensive arid boreal (subalpine) forest that periodically
included montane and temperate trees and open boreal species such as dwarf birch, northern spikemoss, and heath.

Categories: Climate