2. Climate includes patterns of temperature, precipitation,
humidity, wind and seasons. "Climate change" affects more
than just a change in the weather, it refers to seasonal
changes over a long period of time. These climate patterns
play a fundamental role in shaping natural ecosystems, and
the human economies and cultures that depend on them. For
example, a change in the usual timing of rains or
temperatures can affect when plants bloom and set fruit,
when insects hatch or when streams are their fullest. This
can affect historically synchronized pollination of crops,
food for migrating birds, spawning of fish, water supplies for
drinking and irrigation, forest health, and more. Some short-
term climate variation is normal, but longer-term trends now
indicate a changing climate. A year or two of an extreme
change in temperature or other condition doesn’t mean a
climate change trend has been "erased.”
Worldwide, people are paying serious attention to climate
change. In Washington state, climate change is already
disrupting our environment, economy and communities. We
can help slow it down, but we must take action now.
3. CAUSES OF CLIMATE CHANGE
On the broadest scale, the rate at which energy is received from
the sun and the rate at which it is lost to space determine the
equilibrium temperature and climate of Earth. This energy is
distributed around the globe by winds, ocean currents, and other
mechanisms to affect the climates of different regions.
Factors that can shape climate are called climate forcings or
"forcing mechanisms".[4] These include processes such as
variations in solar radiation, deviations in the Earth's
orbit, mountain-building and continental drift, and changes
in greenhouse gas concentrations. There are a variety of climate
change feedbacks that can either amplify or diminish the initial
forcing. Some parts of the climate system, such as the oceans
and ice caps, respond slowly in reaction to climate forcings,
while others respond more quickly.
4. Forcing mechanisms can be either "internal" or
"external". Internal forcing mechanisms are natural
processes within the climate system itself (e.g.,
thethermohaline circulation). External forcing
mechanisms can be either natural (e.g., changes in
solar output) or anthropogenic (e.g., increased
emissions of greenhouse gases).
Whether the initial forcing mechanism is internal or
external, the response of the climate system might
be fast (e.g., a sudden cooling due to
airbornevolcanic ash reflecting sunlight), slow
(e.g. thermal expansion of warming ocean water), or
a combination (e.g., sudden loss of albedo in the
arctic ocean as sea ice melts, followed by more
gradual thermal expansion of the water). Therefore,
the climate system can respond abruptly, but the full
response to forcing mechanisms might not be fully
developed for centuries or even longer.
6. The effects of global warming are the ecological and social
changes caused by the rise inglobal temperatures.
Evidence of climate change includes the instrumental
temperature record,
rising sea levels, and decreased snow cover in theNorthern
Hemisphere. Most of the observed increase in global average
temperatures since the mid-20th century is very likely due to
the observed increase in human greenhouse
gas concentrations[7]. Projections of future climate change
suggest further global warming, sea level rise, and an
increase in the frequency of some extreme weather events.[8]
7. TERRIFYING IMAGE
Many people seem to have gotten a little comfortable with the concept of
global warming. That's not to say anyone's alright with it—in fact, most people
actively want to help fight climate change. But gone are the days when the
concept of climate change first terrified the public as a kind of looming,
inevitable apocalypse.
8. GREENHOUSE EFFECT IMAGE
These gases, mainly water vapor ( ), carbon dioxide (), methane (), and
nitrous oxide (), all act as effective global insulators. To understand
why, it's important to understand a few basic facts about solar radiation
and the structure of atmospheric gases.
9. San Rafael Natinal High School
San Rafael,Tigaon,Camarines Sur
In Partial Fulfillment of Requirements
In
Science and Technology 2
The Impact of Climate Change in the Society
Presented by:
Miguel Louis G.Faurillo
2 Newton
Presented to:
Jose Rizal
Instructor
