Wood Romances

CO2 Coalition 's " Fact #22 " and " Fact #24 " are designed to make you think that warm is better than cold for global temperatures and climate scientists like Michael Mann we should return the Earth's temperature to an "ideal" temperature during the Little Ice Age (LIA). In their "fact #22," they claim that "The most dramatic advances in civilization took place during the last four warm periods—including our own. The advancement of science, technology and the arts have been directly linked to warmer weather." To support this, they show a graph of Greenland Summit temperatures from the GISP2 ice core.   I've  pointed out elsewhere  many of the problems they have when they use this graph to confuse local with global temperatures and misplot "current temperatures" from Box 2009. But here they add another layer of confusion to the claims they've made before because none of these "advancements in science, tech...

Once common refrain I hear among contrarians is that current warming shouldn't be considered exceptional or caused human activity because we're just "coming out of the Little Ice Age." The problem with this can be seen immediately by looking at the Pages2K reconstruction of global temperatures. There was likely a cooling of global temperatures that led to the LIA, normally thought to be from 1450-1850. All treatments of the LIA that I'm aware of place the end of the LIA at or near 1850. So since 1850 it's more accurate to say that we came out of the LIA in ~1850, not that we're coming out of the LIA in 2024. Beyond this, the years between 1850 and 1900 were essentially flat. I calculated the trend with uncertainty for the three GMST datasets for 1850-1900: HadCRUT5:           -0.012 ± 0.023°C/decade (2σ) Berkeley Earth:     0.011 ± 0.028°C/decade (2σ) NOAA:                      -0.006 ± 0...