The cal prefix indicates that the dates are the result of radiocarbon calibration using tree ring data. These values should correspond exactly to normal historical years BC and AD. The term cal BP means the number of years before 1950 and can be directly compared to calendar years.

What does BP mean on a timeline?

Before the Present B.P. (Before the Present) is the number of years before the present. Because the present changes every year, archaeologists, by convention, use A.D. 1950 as their reference. So, 2000 B.P. is the equivalent of 50 B.C.

What are Cal years?

English translation: Calibrated years before present (cal years B.P.)

What does BP and BCE mean?

Dates can be expressed as AD, BC, BCE (before common era), and BP (before present).

What does Ybp mean in Noom?

Your Big Picture When you sign up, Noom takes you through a series of questions to better understand your goals, determine your level of activity and find out about any conditions that could impact your progress. Next, its time to design “Your Big Picture,” or your “YBP,” as Noom calls it. This YBP is made up of three parts: 1.