Climatic Environments (Leaving Cert Geography): Flashcards
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13 cards from this deck
Ice age definition
Ice age definition
Extended period of low temperatures with massive ice sheets on Earth
Most recent major ice age name
Most recent major ice age name
Pleistocene Ice Age
When did Pleistocene Ice Age start
When did Pleistocene Ice Age start
Approximately 2.6 million years ago
When did Pleistocene Ice Age end
When did Pleistocene Ice Age end
About 11,700 years ago
Interglacial periods
Interglacial periods
Warm periods between ice ages; retreating ice, rising sea levels
Current interglacial period
Current interglacial period
Holocene
Milankovitch cycles
Milankovitch cycles
Long-term orbital variations affecting Earth's climate
Eccentricity cycle length
Eccentricity cycle length
~100,000 years
Axial tilt (obliquity) cycle length
Axial tilt (obliquity) cycle length
~41,000 years
Earth's current axial tilt
Earth's current axial tilt
23.5°
Precession cycle length
Precession cycle length
~26,000 years
Key factor triggering ice ages
Key factor triggering ice ages
Reduced summer solar radiation in polar regions
Evidence for Milankovitch theory
Evidence for Milankovitch theory
Ice cores & ocean sediments showing orbital-climate links