CAUSES

CLIMATE CHANGE

of

A long-term shift in the weather

conditions identified by changes in temperature, precipitation, winds, and other indicators.

Can involve both changes in average conditions and variability

Can be determine in two types. The Human Causes and the Natural Causes

CLIMATE CHANGE

- Climate change can also be caused by human activities such as burning of fossil fuels and conversion of land for forestry and agriculture.

- In the beginning of the Industrial Revolution, the human influences on the climate system increases, and other environmental impacts.

- The overall effect of human activities since the Industrial Revolution has been a warming effect, by emissions of carbon dioxide and enhanced by emission of other greenhouse gases to cause Global Warming.

HUMAN CAUSES

Greenhouse gases build-up enhance the

natural greenhouse effect.-It’s a human-induced enhancement of

green house gases. Ongoing emissions of greenhouse gases has a potential to warm the planet to the highest level. Such climate change could have far-reaching

and/or unpredictable environmental, social, and economic consequences.

HUMAN CAUSES

- The Earths climate can be affected by natural factors that are external to the climate system.

- Such us; - a. VOLCANIC ACTIVITY- b. OCEAN CURRENT- c. EARTH ORBITAL CHANGES- d. SOLAR VARIATIONS- e. CURRENT GLOBAL WARMING

NATURAL CAUSES

It throws out large volumes of sulphur

dioxide(SO2), water, dust, and ash to the atmosphere.

Large volumes of gases and ash can influence climate patterns causing atmospheric cooling.

AEROSOLS produced by volcanoes reflect the solar energy back into space and cause a cooling effect to the world.

a. VOLCANIC ERUPTIONS

Oceans, major component of the

climate system. Ocean currents move vast amounts of heat across the planet.

Interactions between the Ocean and the Atmosphere produce El Niño(occur 2 to 6 years).

Deep ocean circulation; movement of cold water from poles towards the equator and movement of warm water from the equator back towards the poles.

b. OCEAN CURRENT

Earth makes one full orbit around

the sun each year(tilted at an angle of to the perpendicular plane of its orbital path.)

Changes in tilt can lead to small but climatically changes the strength of seasons.

More tilt-warmer summers colder winters.

Less tilt-cooler summers milder winters

c. EARTH ORBITAL CHANGES

Sun is the source of energy for

the Earths climate system. Although the Sun’s energy output appears constant from an everyday point of view.

Small changes over an extended period of time can lead to climate changes.

Changes in the Sun’s energy output would cause the climate change.

d. SOLAR VARIATIONS

Global warming is caused by more

active sun. There’s a cooling in the upper

atmosphere, a warming at the surface and in the lower parts of the atmosphere. - due to Greenhouse gasses capturing heat in the lower atmosphere.

Climate models that include solar irradiance changes cannot reproduce last century’s observed temperature trend without including a rise in GREENHOUSE GASES.

e. CURRENT GLOBAL WARMING

Fossil fuels, Global warming and Climate change are all interwoven with each other. We all have to play a vital role in controlling their ill-effects. If we take some small measures from our side, then we can save our planet from major disaster. For this, we have to bring down our huge demand for energy. We should reduce energy consumption in our homes and use our vehicles only for traveling short distances. We also have to stop cutting down trees and plant more number of saplings regularly. This is because plants use up carbon dioxide from the atmosphere and thus check its level from rising. Our activities have put the planet at risk, and it’s now our responsibility to reverse the trend.

THE END THANK YOU