Summary of 07 Geomorfología glaciar 1de2
Scientific Concepts and Discoveries
- Glacial Geomorphology: The study of landforms created by glaciers and the processes involved in their formation.
- Cryosphere: The part of the Earth's surface where water is in solid form, including glaciers, sea ice, and permafrost.
- Glacier Formation: Glaciers form from the accumulation, compaction, and recrystallization of snow, with movement driven by gravity.
- Mass Balance: The dynamic balance between accumulation (snowfall) and ablation (melting), which determines glacier size.
- Types of Glaciers:
- Active Glaciers: Continuously fed by ice streams, advancing in size.
- Passive Glaciers: Stationary fronts with limited snow accumulation.
- Dead Glaciers: No ice flow, receding fronts due to lack of accumulation.
- Thermal Classification:
- Polar Glaciers: No melting in accumulation zones, frozen bases.
- Subpolar Glaciers: Some melting in summer.
- Temperate Glaciers: Melting occurs, allowing for liquid water and increased movement.
Glacier Mobility and Dynamics
- Movement Mechanisms: Ice flows due to gravity, with mobility influenced by temperature and pressure.
- Internal Structure: Alternating layers of winter and summer ice create stratification.
- Deformation Structures: Ice can undergo plastic deformation, leading to folds, faults, and fractures.
Glacier Types and Characteristics
- Ice Caps: Large, dome-shaped ice masses not confined by terrain.
- Ice Shelves: Floating extensions of glaciers formed from Ice Caps.
- Mountain Glaciers: Include cirque glaciers, valley glaciers, and niche glaciers, characterized by their confined nature and varying shapes.
Importance of Glaciers
Glaciers are crucial for ecosystems and human resources, acting as water reserves and regulating river flows. Their fragility and potential disappearance due to climate change and human activity necessitate monitoring and study.
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Category
Science and Nature