Causes and effects of climate change

CAUSES AND

EFFECTS OF

CLIMATE CHANGEDate: 24th November 2012

Presented by: NARAINO MAJIE Nabiilah

CONTENT

Definition of Climate Change

Causes of Climate Change-

Natural Causes & Human Causes

Effects of Climate Change

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

NATURAL CAUSES

Volcanic eruptions

Ocean currents

Earth orbital changes- More tilt = warmer summers & colder

winters

Less tilt = cooler summers & milder winters

Solar Variation

HUMAN CAUSES (Anthropogenic or Man-made

causes)

Greenhouse gases

Deforestation

Coal mining

Burning of fossil fuels

Industrial processes

Agriculture

Deforestation

Coal Mining

Burning of Fossil Fuels

Industrial processes

Agriculture

EFFECTS OF CLIMATE CHANGE

RISE IN SEA LEVEL

Melting ice sheets Sea level rise

HEAVY RAINFALL ACROSS THE GLOBE

EXTREME DROUGHT

DECLINE IN CROP PRODUCTIVITY

ECOSYSTEMS ARE CHANGING

HURRICANES

RISE IN TEMPERATURE

CARBON DIOXIDE ACIDIFIES SEAWATER

CO2 and carbonate (which plankton use to make

shells) combine in the ocean.

The ocean is already more acidic than it was 50

years ago.

Source: Alfred-Wegener-Institute

CO2 CO2

Ocean

Atmosphere

“shelled-critters”

THANK YOU