Global Warming or Global Cooling in the Holocene?
Tuesday, 16 December 2014: 4:00 PM
A recent temperature reconstruction of global annual temperature shows early Holocene warmth followed by a cooling trend through the middle to late Holocene. This global cooling is puzzling because it is opposite to the expected and simulated global warming trend due to the retreating ice sheets and rising atmospheric greenhouse gases (GHGs). Our critical re-examination of this contradiction between the reconstructed cooling and the simulated warming points to potentially significant biases in both the seasonality of the proxy reconstruction and the climate sensitivity of current climate models.