Ice Ages - Solving the Mystery

John Imbrie and Katherine Palmer Imbrie PSU QE697.I45 1979

Nice history of ice age science. Did not read whole book, no time.

Correlation of histories of sea level change

1906 Bernard Brunhes learns bricks and then rocks freeze in Earth's magnetic field as they cool
1930's? Motonori Matuyama finds reversals in lava flows in Japan and Korea
1955-1965 proof of worldwide correlation
Vruhes-Matuyama boundary 700 kya, later found in deep-sea cores

ice sheets large, central Europe polar climate, windy with loess deposits.
- ice sheets small, warm and wet with broadleaf trees
oxygen-isotope ratio varies from 0 to -2 (something), 6 times in 400 Ky

1971 CLIMAP project
- International Decade of Ocean Exploration IDOE. Columbia, Brown, OSU; later Maine and Princeton, later worldwide

Photocopy on file
Fig 43 shows temperature variation over last 11 ky, with a climatic peak ("optimum") at 6.5 kya, and a 6C colder minimum at 10.5 kya. The "little ice age" is shown. No citation for the data source, it may be illustrative rather than a direct plotting of data.
Fig 45 is the last 1000 years, with the "little ice age" featured, adapted from H.H. Lamb 1969
p185 "effects will endure for 1000 years, Fig 47 temperature hockey stick graph, 6 F per century,
p186 Fig 48 175 kY window, showing 140 kY climate cycle and CO2 "superglacial" as a 3 F extra peak, citation JM Mitchell Jr 1977, perhaps "Carbon Dioxide and Future Climate" pp 3-9, Environmental Data Service, March, U.S. Dept. Commerce, but not this JM Mitchell Jr 1977

IceAges