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MapMaster 3

Insolation

WorldPhysical Environment

Average annual levels of solar radiation reaching the Earth's surface

NOAA

A map shows areas of insolation (incoming solar radiation) across the world, categorized by watts per square meter.

The map illustrates global insolation, showing variations in incoming solar radiation from the tropics to the polar regions. In the Northern Hemisphere, high insolation (220 to 280 plus watts per square meter), highlighted as dark green to dark red spans from northwestern Mexico through southern Texas, Florida, and the Caribbean, across the Atlantic to North Africa and Southwest Asia, with peaks in the eastern Sahara and Arabian Peninsula. In the Southern Hemisphere, high insolation areas stretch from East Africa to South Africa and across the Indian Ocean to most of Australia, with other high insolation zones in the Central Pacific and south-central South America. Middle insolation values (120 to 219 watts per square meter), highlighted as light blue to green, are found between 50 degrees north and 50 degrees south latitude, excluding high insolation regions. Low insolation areas (80 to 119 watts per square meter), highlighted as blue to light blue, are located north of the 50-degree lines to the poles in North America, the North Atlantic, and Eurasia, and around the Southern Ocean in Antarctica. The lowest insolation values (less than 80 watts per square meter), highlighted as dark blue, are in the ocean east of northern Greenland.

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Insolation

Oil Slicks (1990s)

240–259

220–239

200–219

180–199

160–179

140–159

120–139

100–119

80–99

Less than 80

Oil Slicks (1990s)

Arizona
44.2%33.7%22.1%
Utah
70.0%8.89%2.63%
Yukon
100%
Northwest Territories
2.63%82.4%14.9%
Idaho
78.1%21.9%
Wyoming
12.4%87.6%
Nunavut
1.36%33.1%65.5%
Montana
14.7%85.3%
North Dakota
100%
Saskatchewan
42.7%57.2%
Nebraska
9.53%90.5%
Missouri
66.4%33.6%
Oregon
96.3%3.75%
New Brunswick
47.2%52.8%
New Mexico
15.5%33.9%49.1%
Kansas
5.90%91.6%2.46%
Wisconsin
100%
Newfoundland and Labrador
29.5%69.1%1.36%
South Carolina
100%
Michigan
100%
Alberta
29.7%53.1%17.2%
Colorado
48.1%51.6%0.332%
Nevada
1.58%63.4%31.2%3.86%
Québec
10.4%38.5%41.0%10.1%
Manitoba
26.0%66.7%7.35%
Oklahoma
82.2%17.8%
California
2.69%22.7%49.4%19.9%5.25%
South Dakota
50.1%49.9%
Minnesota
99.9%
Iowa
77.7%22.3%
Alaska
28.4%69.2%2.23%0.113%
District of Columbia
100%100%
Florida
32.7%67.3%0.837%
New Hampshire
100%57.6%
Rhode Island
100%95.0%
Vermont
100%5.93%
Washington
1.22%98.8%0.496%
Maine
99.8%0.153%5.06%
Kentucky
46.4%53.6%39.9%
Nova Scotia
52.4%47.6%1.05%
Virginia
2.49%97.5%62.1%
Delaware
100%99.3%
Prince Edward Island
100%0.308%
Mississippi
82.1%17.9%29.7%
West Virginia
99.2%0.827%3.63%
Texas
5.26%58.9%35.9%19.3%
Louisiana
26.8%73.2%89.8%
Hawaii
2.67%97.3%1.73%
North Carolina
73.0%27.0%16.0%
Alabama
66.2%33.8%8.82%
British Columbia
21.7%31.5%46.8%0.210%
New Jersey
51.6%48.4%99.2%
Connecticut
100%99.9%
Pennsylvania
19.4%80.6%24.2%
Massachusetts
0.220%99.8%98.1%
Georgia
48.3%51.7%0.104%
New York
100%26.9%
Maryland
100%76.4%
Tennessee
100%1.03%
Ontario
30.4%56.0%13.7%2.30%
Arkansas
50.1%49.9%0.397%
Ohio
51.6%48.4%18.7%
Indiana
0.561%79.2%20.2%44.2%
Illinois
11.8%73.8%14.4%6.79%
0.16.0