Introduction to Infrared Spectroscopy

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Seminar
On
Climate Change

CONTENT

• Introduction
• Definition of Climate Change
• Causes of Climate Change- Natural Causes & Human Causes
• Effects of Climate Change
• Are humans responsible for climate change?
• Conclusion
• References

Introduction

• Climate change is the change in our weather patterns that are occurring because of an increase in the earth's average temperature.
• It is also known as global warming.
• Climate change may result from both natural and human causes though the human causes appear to be increasingly responsible for climate change over the past few decades

Definition of Climate Change

• “ It is a change which is attributed directly or indirectly to human activity that alters the composition of the global atmosphere and which is in addition to natural climate variability observed over comparative time periods”

Causes of Climate Change

• Human causes of climate change
• Greenhouse gases
• Deforestation
• Coal mining
• Industrial processes
• Agriculture
• Natural changes to the climate
• Volcanic eruptions
• Solar irradiance
• El Niño Southern Oscillation (ENSO)
• Milankovitch cycles

Natural changes to the climate

• Volcanic eruptions
• Solar irradiance
• El Niño Southern Oscillation (ENSO)
• Milankovitch cycles

Volcanic eruptions

• Volcanoes have a mixed effect on our climate. Eruptions produce aerosol particles that cool Earth, but they also release carbon dioxide, which warms it. Volcanoes produce 50 times less carbon dioxide than humans do, so we know they are not the leading cause of global warming.
• On top of this, cooling is the dominant effect of volcanic eruptions, not warming.