* Glaciers are not uniform: Some glaciers are thick and massive, while others are thinner and smaller.
* Ice density varies: Ice isn't a uniform substance. Its density can be affected by factors like air bubbles trapped within it, making some ice less dense than others.
* Water depth: The depth of the water the glacier is floating in plays a crucial role. A glacier in a shallow lake will have more of its mass above water than a glacier floating in a deep fjord.
Think of it like an iceberg: You've likely heard the saying "only the tip of the iceberg is visible." The same principle applies to glaciers. The amount of ice submerged beneath the water surface is usually much greater than what's visible.
To understand a specific glacier's situation, you'd need to consider:
* The glacier's total volume: This tells you how much ice is present.
* The depth of the water it's in: This affects how much of the glacier is submerged.
If you're interested in a particular glacier, you can find this information from scientific research or organizations like the National Snow and Ice Data Center.