By Andy May In 2000, Richard Alley released an ice core temperature reconstruction for Central Greenland using Oxygen isotope ratios. He describes the technique used here. I used this ice core proxy data in a previous post “Climate and Civilization for the past 4,000 years.” Since Alley’s data stops at 1855, I spliced the GreenlandContinue reading “Comparing the Kobashi and Alley Central Greenland Temperature Reconstructions”
Present warming is not unusual.
By Andy May This is an updated timeline of climatic events and human history for the last 18,000 years. The original timeline was posted in 2013. The updated full size (Ansi E size or 34×44 inches) Adobe Reader version 8 PDF can be downloaded here or by clicking on Figure 1. It prints pretty wellContinue reading “Climate and Human Civilization over the last 18,000 years, updated”