On Mon, 16 May 2005 13:45:54 -0500, "MnMikew"
wrote:



Highest CO2 concentrations in hundreds of thousands of years.
Unprecedented.

More junk science. Just how did we measure the CO2 hundreds of thousands of
years ago anyway?



Arctic and Antarctic Research Institute, Beringa Street 38, 199397,
St. Petersburg, Russia
Period of Record
417,160 - 2,342 years BP


Methods
In January 1998, the collaborative ice-drilling project between
Russia, the United States, and France at the Russian Vostok station in
East Antarctica yielded the deepest ice core ever recovered, reaching
a depth of 3,623 m (Petit et al. 1997, 1999). Ice cores are unique
with their entrapped air inclusions enabling direct records of past
changes in atmospheric trace-gas composition. Preliminary data
indicate the Vostok ice-core record extends through four climate
cycles, with ice slightly older than 400 kyr (Petit et al. 1997,
1999)...

....The extension of the Vostok CO2 record shows the present-day levels
of CO2 are unprecedented during the past 420 kyr.

http://cdiac.esd.ornl.gov/trends/co2/vostok.htm