Unkotare
Diamond Member
- Aug 16, 2011
- 131,279
- 25,588
- 2,180
CO2 Science
"More specifically, the Swedish scientist's study includes a sample of 455 radiocarbon-dated mega-fossils (258 Pinus, 172 Betula, 25 Alnus) that originated from the present-day tree line ecotone and above, thirteen of which had not previously been published. And the resulting history he developed indicates that "summer temperatures during the early Holocene thermal optimum may have been 2.3°C higher than present," which difference, in Kullman's words, "corresponds to a general cooling trend of 0.24°C/century, which matches the Milankovitch model of orbitally-driven climate forcing (cf. Berger, 1988; Esper et al., 2012) and indicates that this mechanism has operated as the ultimate driver of climate change throughout the Holocene.""
"More specifically, the Swedish scientist's study includes a sample of 455 radiocarbon-dated mega-fossils (258 Pinus, 172 Betula, 25 Alnus) that originated from the present-day tree line ecotone and above, thirteen of which had not previously been published. And the resulting history he developed indicates that "summer temperatures during the early Holocene thermal optimum may have been 2.3°C higher than present," which difference, in Kullman's words, "corresponds to a general cooling trend of 0.24°C/century, which matches the Milankovitch model of orbitally-driven climate forcing (cf. Berger, 1988; Esper et al., 2012) and indicates that this mechanism has operated as the ultimate driver of climate change throughout the Holocene.""