yBP

This corresponds to a period in which we went through the industrial revolution and greatly increased our use of carbon which has basically been sequestered since the Carboninferous period 300,000,000 yBP.

More Unthreaded « Climate Audit 2007

This corresponds to a period in which we went through the industrial revolution and greatly increased our use of carbon which has basically been sequestered since the Carboninferous period 300,000,000 yBP.

More Unthreaded « Climate Audit 2007

My recollection is that the area wa not free from ice until after 10,000 yBP.

Gajewski, Mann and Warm Ice Age Arizona « Climate Audit 2007

The estimated divergence date for the two haplogroup P sequences (22,401 yBP) is 1. 3-fold higher than that for macro-haplogroup T

PLoS ONE Alerts: New Articles Ceiridwen J. Edwards et al. 2010

This sample was radiocarbon dated, as part of the analysis undertaken by Troy et al. [8] to 5,936±34 yBP (uncalibrated radiocarbon age).

PLoS ONE Alerts: New Articles Ceiridwen J. Edwards et al. 2010

Haplogroup P is a sister clade of the super-haplogroup QT with a previously estimated divergence time of 71,000 yBP

PLoS ONE Alerts: New Articles Ceiridwen J. Edwards et al. 2010

This sample was excavated in 1998 from Carsington Pasture Cave in Derbyshire, England, and has been radiocarbon dated to 6,738±68 calibrated (cal.) yBP.

PLoS ONE Alerts: New Articles Ceiridwen J. Edwards et al. 2010

This pre-dates the start of the Neolithic period in Britain (5,900-5,580 cal. yBP)

PLoS ONE Alerts: New Articles Ceiridwen J. Edwards et al. 2010

Molecular clock estimates based on ancient sequences indicate that haplogroup P underwent an expansion between 10,050 and 30,230 years prior to sample deposition, or approximately 16,000 to 36,000 years before present (yBP).

PLoS ONE Alerts: New Articles Ceiridwen J. Edwards et al. 2010

Adding half of this time difference gives a coalescence time of 22,401 yBP (95% confidence interval range 13,135-34,652 yBP).

PLoS ONE Alerts: New Articles Ceiridwen J. Edwards et al. 2010