3.
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
4. - 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
5.
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
6. - 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
7.
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
8.
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
9.
Earth makes one full orbit around the sun
each year(tilted at an angle of 𝟐𝟑. 𝟓 𝐨
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
10.
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
11.
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