Helium HOWTO
J.-Cl. Dutay, M.-F. Weirig, P. Jean-Baptiste, E. Maier-Reimer, and
J. Orr
$Revision: 1.9 $, $Date: 2001/04/27 13:22:11 $
This document provides step-by-step guidelines to make a steady-state
simulation for mantle Helium-3 and Helium-4 according to the standard
OCMIP-2 protocols. This simulation has two boundary conditions: (1) a
loss term due to the sea-to-air flux of mantle helium, and (2) a
source term due to emission of rich He-3/He-4 water along ocean ridges
on the seafloor. Globally integrated, the source term amounts to 1000
moles of He-3 per year; regionally, sources are partitioned as a
function of ridge position, length, and spreading
rate).