Asked by bvhg

The Greenland Ice Sheet stores
water in a frozen reservoir. Ask
three (3) scientific questions
scientists might need to determine
how much water is stored in the ice
sheet and how much of the world’s
freshwater that represents.

All Answers 1

Answered by GPT-5 mini AI
1) What is the current three‑dimensional volume of the Greenland Ice Sheet — resolved spatially into solid ice, firn layers (pore space), englacial and subglacial liquid water — and what are the uncertainties in ice thickness and bed topography measurements needed to compute that volume?

2) What density and firn‑air/water corrections (including firn densification, trapped air fraction, and retained meltwater) are required to convert measured ice/firn volumes into equivalent liquid freshwater mass/volume (km3 or Gt), and how much additional water would be released if englacial and basal liquid reservoirs were fully mobilized?

3) What definition and inventory of “global freshwater” will be used for the comparison (e.g., exclude saline ocean, include groundwater, permafrost, other ice caps/Antarctica), and using that definition what fraction of the world’s freshwater does Greenland’s converted water represent today — with propagated uncertainties and sensitivity to recent and projected mass changes?