EXIT CHAPTER CHAPTER 21.1 What Is Climate? 21.2 Climate Zones 21.3 Climate Change CHAPTER OUTLINE...
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EXIT CHAPTER 21 21 CHAPTER 21.1 What Is Climate? 21.2 Climate Zones 21.3 Climate Change CHAPTER OUTLINE Climate and Climate Change
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Transcript of EXIT CHAPTER CHAPTER 21.1 What Is Climate? 21.2 Climate Zones 21.3 Climate Change CHAPTER OUTLINE...
EXIT CHAPTER
2121CHAPTER
21.1 What Is Climate?
21.2 Climate Zones
21.3 Climate Change
CHAPTER OUTLINECHAPTER OUTLINE
Climate and Climate Change
CHAPTER HOME
The climate of a region is its long-term weather. The
two main characteristics of climate are temperature
and precipitation, which can be described by
averages and ranges.
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VOCABULARY
Many other factors act together to determine Earth’s
climate: latitude, elevation, distance from large
bodies of water, ocean currents, topography,
prevailing winds, and vegetation.
21.1 What Is Climate?2121 Climate and Climate Change
climate
climate controls
CHAPTER HOME
Some climate controls have a greater effect than
others at different locations.
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VOCABULARY21.1 What Is Climate?
2121 Climate and Climate Change
Beijing, China and Valdivia, Chile had the same average temperature but different climates.
climate
climate controls
CHAPTER HOME
Earth has a great diversity of climates. Scientists
categorize Earth’s many climates into zones: polar,
dry, humid tropical, moist mid-latitude with mild
winters, and moist mid-latitude with severe winters.
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Most climate zones are further divided into
subclimates. In mountainous regions, climates can
vary greatly within a small area.
21.2 Climate Zones2121 Climate and Climate Change
click here toenlarge
CHAPTER HOME
Earth’s climate is constantly changing.
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21.3 Climate Change2121 Climate and Climate Change
Antarctic Temperatures for Past 420,000 Years
Thousands of years ago
Te
mp
era
ture
dif
fere
nc
e (
°C)
co
mp
are
d t
o p
res
en
t
CHAPTER HOME
Earth’s climate is constantly changing.
CHAPTER
21.3 Climate Change2121 Climate and Climate Change
Global climate changes can be caused by changes
in Earth’s energy budget and by the interactions
among Earth’s spheres.
Causes for climate change include variations in
Earth’s motions, the location of the continents,
variations in sunspots, and gases and ash ejected
into the atmosphere by volcanoes.
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CHAPTER HOMECHAPTER
21.3 Climate Change2121 Climate and Climate Change
Human activities are increasing the amount of
greenhouse gases in the atmosphere, and there is
evidence that the increase is contributing to current
global warming.
Global Surface Temperature Change
Year
Tem
per
atu
re d
iffe
ren
ce
(°C
)co
mp
ared
to
ave
rag
e fo
r 19
51–1
980
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CHAPTER HOMECHAPTER
21.3 Climate Change2121 Climate and Climate Change
Human activities are increasing the amount of
greenhouse gases in the atmosphere, and there is
evidence that the increase is contributing to current
global warming.
The causes of climate change are complex, so
predicting climate change is difficult.
Scientists study past climate change by analyzing
sea-floor sediments, glacier samples, tree rings, and
other indirect evidence.
SECTION OUTLINESECTION OUTLINE
CHAPTER
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2121 Climate and Climate Change
This is the end of the chapter presentation of lecture notes. Click the CHAPTER HOME button or exit the presentation.
