Chapters 4-5
Chapter 4
For the most part I will only link the data once. Since most captions contain the name of the data source (EPICA for example), I won’t clutter the page up with redundant links.
Illustration 24: Temperature reconstruction using deep sea sediment cores. (Raymo, 2005)
L. E., and M. E. Raymo (2005), A Pliocene-
Pleistocene stack of 57 globally distributed benthic d18O records,
Paleoceanography,20, PA1003, doi:10.1029/2004PA001071.
Illustration 25: Weather.com has a useful way of showing how each month behaves over the course of the year. This is their view of Manhattan, Kansas.
Illustration 26: EPICA ice core for the Eemian and Holocene interglacials. Holocene is this summer and Eemian is last summer.
Illustration 27: Throughout the year the temperature can drastically change from day to day. Spring and Autumn experience the most variable temperature.
Illustration 28: June-September show the least year to year variation in temperature. December- February are the most unpredictable.
Chapter 5:
Illustration 29: Modern Day Tree Line. Primarily it was only Greenland that was north of the tree line during the Eemian. Source: Map The M Factory Smithsonian Institution
Illustration 30: The EPICA and Vostok ice core temperature reconstructions for the Eemian
Vostok Ice Core Data for 420,000 Years, IGBP PAGES/World Data Center
for Paleoclimatology Data Contribution Series #2001-076.
NOAA/NGDC Paleoclimatology Program, Boulder CO, USA.
Illustration 34: CO2 levels dropped ~8,000 years AFTER the temperature dropped. The cooling could not have been caused by dropping levels of CO2.
Illustration 35: Heavy Oxygen Cycle: NASA Earth Observatory
My Article on the Heavy Water Cycle.
Excellent images, John.
They really help to make the book easier to understand.
Thank you for your work on this.
Hey John,
Just had a question regarding the Interglacial Comparison chart – http://theinconvenientskeptic.com/wp-content/uploads/2012/02/Chap_4-Illustration_26.png
Are the Holocene interglacial temp. anomalies up to present? The reason I ask is because the temp. chart at the top of your website shows a gradual cooling the past 6,000 years, while that Interglacial comparison chart shows temps steady from the end of the last glacial. Don’t see the 6,000 year cooling on that chart. Can you please explain this?
Joe,
The Holocene temperatures are from the same ice core as the Eemian. They go up to ~1900 AD. You are correct that this particular proxy doesn’t show cooling. The primary cooling has been in the NH, but other ice cores from Antarctica do show the cooling. I used the EPICA core because it is one of the few that show both interglacials at good resolution.
The Taylor Ice Dome is also in Antarctica and it shows some of the strongest cooling of all.
http://theinconvenientskeptic.com/2010/10/taylor-dome-ice-core-analysis/