• The mass flux of a glacier is amount of ice that flows through a cross section in a given amount of time.

For instance on the Llewellyn glacier in British Columbia the measured the surface velocities are seen below. The average of these velocities is .24m/day. According to The Physics of Glaciers is is within a few per cent of the mean cross sectional velocity. Seismic reflection methods were then used to determine the depth and shape of the glacier and a cross sectional area could then be estimated.

• The cross sectional area was determined to be approximately 2060 square meters.
• Mass flux equals cross sectional area times mean cross sectional velocity.

Mass flux = 495 cubic meters per day. Or 180,000 cubic meters per year.