w.

]]>Fixed.

It’s just easier to read in LaTeX than trying to guess from text.

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]]>If changes in ice thickness are ignored, the average accumulation rate a(ij) between the dated depth horizons zi and zj (where i, and j, are any two dated horizons) is given by:

Aij = {1/dt(ij)} * (Integral from zi to zj) (1 – z/H)^-p dz

where H is the ice thickness, z is the ice-equivalent depth, p is a constant, and dt(ij) is the

number of years between zi and zj.

I’m too tired right now to do the math to see how that relates to your formula above.

w.

]]>snow “¢’¬? 3.3m

ice equiv. “¢’¬? 1.4m

h2o equiv. “¢’¬? 1.3m

Unfortunately, neither your formula above nor the Quelccaya text file you link to above say what kind of accumulation they’re talking about … I suspect the desired figure is h2o equivalent, but Quelccaya doesn’t say what they’re using … OK, I found it, they do say it’s h20 equivalent.

I just looked up the Sajama core information. No accumulation information, but I did a Solver solution and got a value of 0.02 to match with their dates/depths … doesn’t make sense. Likely this is because the accumulation rates change over time, as described in TROPICAL GLACIER AND ICE CORE EVIDENCE OF CLIMATE CHANGE ON ANNUAL TO MILLENNIAL TIME SCALES.

Unfortunately, they do not give absolute accumulation rates for the various dates, just deviations in sigma from zero … I’ll have to read more to figure out why.

w.

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