Page 235 - Geosystems An Introduction to Physical Geography 4th Canadian Edition
P. 235
CriTiCaLthinking 7.3 Identify Two Kinds of Fog
in Figure CT 7.3.1, can you tell which two kinds of fog are pictured? These questions may help: How does the tem- perature of the river water compare with that of the overly- ing air, especially beyond the bend in the river? Could the temperature of the moist farmlands have changed over- night, and if so, how? Might that contribute to fog forma- tion? Can you see any evidence of air movement, such as a light breeze? How might this affect the presence of fog? •
60°
180°
170°
160°
150°
140°
Barrow
60°
Bering Sea
Nome
Kodiak
Gulf of Alaska
ARCTIC OCEAN
Beaufort Sea
Inuvik
Baffin Bay
Hudson Bay
60
60
40 30 20
40 30
20
60
60
20
60
60
60
Arctic Circle
90
60
120
30
60
30
120
90
90
150
50°
30
30
90
30
60
20
50°
40
90
180
90
20
20 30
30
30
30
20
60
90 120
60
20
150
60
60
20
60
60
30
30
10
20
40°
20
30
80
20
30
40
80
60
10
40
200
o
80
i
60
r
e
p
20
40°
u
r
80
40
S
.
40
L
30
PACIFIC OCEAN
DAYS WITH HEAVY FOG
80 and over 60–79 40–59 20–39 10–19 Under 10
Roseburg Eureka
S. St. Marie Lansing
60°
Fort Yukon
Fairbanks Anchorage
Resolute
Baker Lake
30°
40°
50° St.
John's
Halifax
20 30
60
L
30
n
.
H
10
40
n
80
u
r
o
100
a
30
20
g
i
h
20
c
60
i
M
20
20 40
20 30
.
L
40
20
20
Pt. ReSyaecsramento over 200
Chicago Lincoln Springfield
Kansas St. Louis City
Dodge City
Oklahoma City
ATLANTIC
60
San Francisco Fresno
Grand Junction
Denver
Charleston Lexington
Knoxville
Memphis Little
Rock
Richmond Norfolk
20 40
80
20
30
60
20
80 40
Pt. Arguello 140
Raleigh Hatteras Wilmington
30°
40
20
10
Santa Catalina
Albuquerque Amarillo Abilene
Atlanta Charleston Birmingham
Whitehorse Juneau
Labrador Sea
Vancouver
Regina
Havre
Great Falls Billings
Seattle WashingtPonrtland
Cape Disappointment, over 200
Portland Concord Toronto Albany Boston
Los Angeles
Columbia
San Diego
158
120°
Fort Worth
Del Rio San
Antonio Brownsville
Jackson Jacksonville
20 Edmonton
30 60
20 30
Spokane
Missoula Pendleton
Burns Boise
Pocatello Winnemucca
Reno Salt Lake
Tonopah City
Milford Las
Vegas
Yuma Phoenix
110°
Churchill
L. Winnipeg
Winnipeg International
Williston Falls Fargo Duluth
Bismarck Green Bay Minneapolis
Caribou Quebec
Montreal Ottawa
40
30
10 10
20
El Paso
Shreveport Pensacola
Rapid City Huron
Dubuque
Hartford
New York
Philadelphia Washington
Chapter 7 Water and Atmospheric Moisture
199
▲Figure CT 7.3.1 Two kinds of fog. [Bobbé Christopherson.]
Detroit Cheyenne Platte Moines Indianapolis Columbus
10
30
20
20
10
5
20°
▲Figure 7.24 Mean annual number of days with heavy fog in Canada and the United States. The foggiest spot in the United States is the mouth of the Columbia River, where it enters the Pacific Ocean at Cape Disappointment, Washington. One of the foggiest
places in the world is Newfoundland’s Avalon Peninsula, specifically Argentia and Belle isle, which regularly exceed 200 days of fog each year. [Data courtesy of NWS; Climatic Atlas of Canada, Atmospheric environment Service Canada; and The Climates of Canada, environment Canada, 1990.]
North Des
Pittsburgh
0
250
500 KILOMETRES
Houston
New Orleans
Tampa Miami
90° 80° 70°
Avalon Peninsula, Newfoundland over 200
30°
OCEAN
10
60
20
2
10
20
10
2
40
30
Tropic of Cancer
