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Climate Change

There are 3 cycles of climate change. The Quaternary period is the period from today to 2.588 million years ago.

Quaternary vs Neogene

Quaternary vs Neogene

  • The Earth was warmer than it is now in the period before the Quaternary period (called the Neogene period).
  • The Quaternary period has lasted for the last 2.588 million years.
  • The Neogene period lasted 21.4 million years.
Within the Quaternary period

Within the Quaternary period

  • Over the last 300,000 years, there is a cycle between glacial periods and interglacial periods.
  • Glacial periods are cold and last for roughly 100,000 years.
  • Interglacial periods are about 7 degrees warmer on average and last about 8,000-12,000 years.
Within the last 200 years

Within the last 200 years

  • Interglacial periods usually last 8,000-12,000 years.
  • 200 years is very small on this timescale.
  • NASA scientists find that the Earth has warmed by 0.8 degrees Celsius since 1880. Most of this warming has happened since 1970.
  • Without changes to our current behaviour, some studies expect the Earth's temperature to be 4.1°C – 4.8°C higher than in 1880 by 2100, which is 4°C more of warming by 2100.
  • The behaviour of the last 150 years is what we call climate change.
The greenhouse effect

The greenhouse effect

  • The scientific consensus is that human activities are responsible for the recent increase in global temperatures because they are strengthening the greenhouse effect.
    • The greenhouse effect happens when greenhouse gases (e.g. carbon dioxide, methane) absorb heat that has been reflected off the Earth and re-radiate this heat back towards Earth.
Jump to other topics
1

The Challenge of Natural Hazards

1.1

Natural Hazards

1.2

Tectonic Hazards

1.3

Weather Hazards

1.4

Climate Change

2

The Living World

2.1

Ecosystems

2.2

Tropical Rainforests

2.3

Hot Deserts

2.4

Tundra & Polar Environments

3

Physical Landscapes in the UK

3.1

The UK Physical Landscape

3.2

Coastal Landscapes in the UK

3.3

River Landscapes in the UK

3.4

Glacial Landscapes in the UK

4

Urban Issues & Challenges

5

The Changing Economic World

5.1

The Changing Economic World

5.2

Economic Development in the UK

6

The Challenge of Resource Management

6.1

Resource Management

6.2

Food

6.3

Water

6.4

Energy

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