Map of Glaciers – Global Ice Sheets, Glacier Regions & Climate
Map of Glaciers - Global Ice Sheets, Glacier Regions and Climate Guide
Explore where glaciers are found around the world, from the ice sheets covering Antarctica and Greenland to mountain glaciers in Alaska, the Himalayas, the European Alps and Patagonia. This guide explains glacier locations, ice types, movement, melting and how to read glacier maps.
Quick answer: Where are the world's main glaciers?
The largest stores of glacial land ice are the Antarctic and Greenland ice sheets. Other major glacier regions include Alaska, Arctic Canada, Iceland, Svalbard, the Himalayas and Karakoram, the European Alps, New Zealand's Southern Alps and the Patagonian Andes. Glaciers form where snow persists long enough to compact into ice that moves under its own weight.
Explore an Interactive World Glacier Map
The Global Land Ice Measurements from Space (GLIMS) Glacier Viewer offers mapped glacier outlines from research datasets. It is useful for identifying glacier locations, comparing mapped extents and exploring information about individual glaciers.
Global Glacier Viewer - GLIMS
Explore glacier outlines, locations and available mapping records across the world.
Explore the glacier mapGlacier outlines are observations and interpretations from particular dates, not a live display of current ice edges.
How to Read a Glacier Map
- Choose a region: Start with Greenland, Alaska, the Himalayas, Patagonia or another glacier area.
- Zoom in: Look for glacier outlines and related geographic features.
- Check the record date: Different outlines may represent different observations and years.
- Compare carefully: Differences between outlines can reflect real changes or different mapping methods and source images.
- Distinguish ice types: Glacier inventories are not always comprehensive maps of ice sheets, seasonal snow, sea ice or ice shelves.
Major Glacier Regions Around the World
| Region | Ice features | Why it matters |
|---|---|---|
| Antarctica | Vast ice sheet, outlet glaciers and ice shelves | Earth's largest land-ice reservoir |
| Greenland | Ice sheet and peripheral glaciers | Major contributor to observed sea-level change |
| Alaska and western Canada | Mountain glaciers, icefields and tidewater glaciers | Important glacier research and regional water systems |
| Himalayas and Karakoram | High-altitude valley and mountain glaciers | Influence seasonal river flows in parts of Asia |
| Patagonia | Southern and Northern Patagonian Icefields | Large temperate glacier systems in South America |
| Iceland and Svalbard | Ice caps, outlet and tidewater glaciers | Northern glacier and climate observation regions |
| European Alps | Mountain and valley glaciers | Visible records of changes in Alpine ice |
| New Zealand Southern Alps | Alpine glaciers including Tasman Glacier | Southern Hemisphere mountain glaciation |
These are selected major regions, not a complete inventory. Glaciers also exist in other mountain systems and high-latitude islands.
What Is a Glacier and How Does It Form?
A glacier forms when snowfall accumulates over many years and survives seasonal melting. Buried snow becomes denser firn and eventually glacier ice. Where the ice grows thick enough, it deforms and flows under gravity. Some glaciers also slide over the ground beneath them.
Glaciers can advance or retreat depending on snow accumulation, ice loss and flow. A retreating glacier may still be moving downhill; retreat means its terminus is moving uphill overall because ice loss exceeds the ice supplied to its end.
Types of Glaciers and Ice Features
| Type | Description |
|---|---|
| Valley glacier | Flows down a mountain valley |
| Cirque glacier | Occupies a bowl-shaped hollow in mountainous terrain |
| Icefield | Broad interconnected ice mass, strongly influenced by underlying topography |
| Ice cap | Dome-like land ice covering less than 50,000 square kilometres |
| Ice sheet | Glacial land ice covering more than 50,000 square kilometres |
| Tidewater glacier | A glacier that reaches the sea, often releasing icebergs through calving |
| Ice shelf | Floating extension of land-based glacier or ice-sheet ice |
Glaciers, Ice Sheets, Ice Shelves and Sea Ice: What Is the Difference?
Glaciers and ice sheets form on land from accumulated snow and flow under their own weight. Ice shelves are floating extensions of land-based ice, commonly around Antarctica. Sea ice forms when seawater freezes and is not itself a glacier.
This distinction matters for sea-level rise. Melting land-based ice adds water to the ocean, whereas melting sea ice already afloat has little direct effect on global sea level. Ice shelves can nonetheless help restrain glaciers behind them; changes to those shelves can influence land-ice flow.
How Glaciers Shape the Landscape
Glaciers erode, transport and deposit rock and sediment. Over long periods they can create recognisable landforms:
- U-shaped valleys: Broad valleys carved by moving ice.
- Moraines: Ridges or accumulations of material transported by glaciers.
- Cirques: Bowl-shaped hollows in mountain landscapes.
- Glacial lakes: Lakes formed by ice erosion, meltwater or natural sediment dams.
- Crevasses: Deep cracks that form as glacier ice stretches and flows.
Glaciers, Freshwater and Climate Change
Glaciers and ice sheets store freshwater in frozen form. Glacier meltwater contributes to streams and rivers in some regions, especially during warm or dry seasons. These effects vary by catchment and glacier size.
Glacier mass balance describes gains from snowfall and other accumulation compared with losses from melting, sublimation and calving. Long-term warming has contributed to widespread glacier mass loss, although individual glaciers respond differently depending on snowfall, topography and ocean conditions.
Changes in land-based ice affect sea level, freshwater availability, landscapes and some local hazards. Glaciers are monitored using satellite imagery, aerial surveys, ground measurements and models.
Can Glaciers Grow or Advance?
Yes. Glaciers can gain ice mass during favourable conditions, and their fronts can advance. A single cold or snowy year, however, does not establish a long-term trend. Scientists assess changes over multiple years using measurements of ice thickness, area, movement and mass balance.
Frequently Asked Questions
Where are most of Earth's glaciers located?
Antarctica and Greenland hold by far the largest volumes of glacial land ice. Mountain glaciers also occur on many continents and high-latitude islands.
What is the difference between a glacier and an ice sheet?
An ice sheet is an exceptionally large body of glacial land ice covering more than 50,000 square kilometres. Earth currently has two: one in Antarctica and one in Greenland.
Do glaciers move?
Yes. Glacier ice deforms and can slide over the ground. Rates differ greatly between glaciers and even between parts of the same glacier.
Does Australia have glaciers today?
Mainland Australia has no surviving modern glaciers. Ancient glaciation shaped parts of the Australian landscape, and New Zealand has present-day mountain glaciers.
Are glaciers and sea ice the same thing?
No. Glaciers are formed from compacted snowfall, generally on land. Sea ice forms directly from freezing seawater.
Why do glaciers look blue?
Dense glacier ice can transmit blue wavelengths more effectively than red light. The appearance also depends on air bubbles, surface snow, lighting and viewing conditions.
How do scientists measure glacier retreat?
They compare dated photographs, satellite observations, mapped outlines, elevation measurements and field surveys. Retreat of the terminus is not identical to loss of ice mass.
Are all glaciers shrinking?
No. Some glaciers can temporarily stabilise or grow, but observations show widespread global glacier mass loss over recent decades.
Trusted Glacier Map and Research Resources
- GLIMS Glacier Database - Interactive glacier viewer
- National Snow and Ice Data Center - Glacier information
- NASA Earth Observatory - Satellite imagery and research
- World Glacier Monitoring Service - Glacier observations
Related Fosmore Maps and Guides
Disclaimer
This page is for general educational and reference purposes only. Glacier outlines, measurements and ice conditions change over time and may vary by observation date, mapping method and scientific dataset. Linked maps do not necessarily show current ice conditions. This guide is not suitable for glacier travel, mountaineering, navigation or safety-critical decisions. Seek current local guidance and appropriate professional expertise for field activities. Fosmore is not affiliated with or endorsed by the external research organisations listed here.