Tag Archives: Holocene

Holocene heat corrected

To set this up, the following is a graph of the temperature during the Holocene Era comes from a 2017 James Hansen publication, with explanatory enhancements by David Spratt:

It was thought that both the Holocene and the Eemian, 130 to 118,000 years ago, experienced an early thermal maximum reflected in the big hump in the graph.

Research done by Samantha Bova et al Seasonal origin of the thermal maxima at the Holocene and the last interglacial gives quite a different picture, one of steady warming. This has important implications for where we are at with global warming. Continue reading Holocene heat corrected

Goodbye Holocene, hello Anthropocene?

It hasn’t happened yet, not officially. The final decision rests with an august scientific body called the International Commission on Stratigraphy, which has a 36-person Working Group on the Anthropocene. Now 24 scientists, including some from the Working Group, have produced a paper advocating for the Anthropocene to be recognised as having begun in the mid-20th century. Continue reading Goodbye Holocene, hello Anthropocene?

New bigger, better hockey stick

Holocene_Temperature_Variations_Rev_300 One of the most contested graphs in climate science has been the hockey stick. Inconveniently for gain-sayers later science has confirmed the shape of the thing as sites such as Skeptical Science and New Scientist confirm.

The hockey stick was confined to temperatures for the last 1000 years. Graphs of the whole Holocene era were rare, although they did exist, as the featured image above. Now a study by Marcott et al has used 73 proxies to study average global temperature for the whole Holocene period of the last 11,300 years. You can read about it at New Scientist, Mother Jones, Climate Progress here and here. Continue reading New bigger, better hockey stick