... in a conditionally
unstable atmosphere over the Great
Plains. Notice that, in the distance, the
cumulonimbus with the anvil top has
reached the stable part of the
atmosphere.
to peer into a tornado-generating ... lingering close to the ground. As
the day progresses, sunlight warms the surface and the
surface warms the air above. As the air temperature near
the...
... Baker ski
Tamarack, CA, January, 19 11
Silverlake, Boulder, CO
April 14 15 , 19 21
Bagdad, CA
August 19 09 to May 19 12
11
12
area, WA ,19 98
sunlight that reaches the surface is reflected by snow and
ice, ... period, the earth
began to cool slightly over the next 25 years or so. In the
late 19 60s and 19 70s, the cooling trend ended over most
of the Northern Hemispher...
... changes.
376 Chapter 14 Climate Change
0.6
0.5
0.3
0.2
0.4
0.0
0 .1
Temperature Change (°
C)
–0 .1
–0.2
–0.3
–0.4
–0.5
–0.6
18 50 18 75
Year
19 25 19 50 19 75 2000
19 20
FIGURE 14 .5
Changes in the average global ... (eccentricity) of the earth’s orbit
about the sun
2. precession of the earth’s axis of rotation, or wobbling
3. changes in the tilt (obliquity) of the...