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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

Petroleum and Natural Gas Production

British Empire, Early 1920s

280 and above

260–279

240–259

220–239

200–219

180–199

160–179

140–159

120–139

100–119

80–99

Less than 80

Petroleum and Natural Gas Production

Aden

Anglo-Egyptian Sudan

Bahama Islands

Basutoland

Bechuanaland

British Guiana

British Honduras

British North Borneo

Cameroons

Canada

Ceylon

Cyprus

Egypt

Falkland Islands

Fiji

Gambia

Gold Coast

India

Iraq

Irish Free State

Jamaica

Kenya

Kuwait

Malay States

Mauritius

New Hebrides

New Zealand

Newfoundland

Nigeria

North East New Guinea

Northern Rhodesia

Nyasaland

Oman

Palestine

Qatar

Samoa

Sarawak

Sierra Leone

Solomon Islands

South Georgia and the South Sandwich Islands

South West Africa

Southern Rhodesia

Swaziland

Tanganyika

Territory of Papua

Togo

Transjordan

Trinidad and Tobago

Trucial Oman

Uganda

Union of South Africa

United Kingdom

22.2%39.2%38.8%23.0%48.3%29.3%25.0%
24.2%10.8%32.1%20.0%10.7%2.32%
67.9%1.54%1.15%23.6%32.7%37.1%3.32%37.1%
30.3%51.5%53.3%37.8%31.4%29.4%3.01%25.1%87.3%96.9%45.3%46.0%64.8%75.6%51.6%
53.8%71.3%64.6%100%29.4%40.9%94.0%84.3%
100%3.17%20.4%20.7%37.8%46.8%34.8%33.8%79.7%12.5%17.7%95.6%25.7%88.8%
8.19%16.7%28.7%36.0%25.2%9.12%9.14%13.1%10.2%98.8%96.9%
39.9%47.7%8.87%62.1%61.7%100%1.47%98.6%100%99.6%9.11%85.3%82.8%43.0%
16.8%5.48%11.6%14.6%1.79%17.2%14.4%23.3%28.2%21.2%7.93%95.5%3.10%
4.91%9.95%44.8%47.2%1.63%98.5%97.8%
44.2%25.1%71.7%22.0%21.9%97.5%39.6%38.0%
44.5%47.7%12.8%13.5%24.0%29.3%31.0%47.4%4.39%37.8%98.5%93.1%26.1%30.2%96.8%76.6%56.6%
3.98%12.4%32.2%38.6%22.5%44.2%32.5%10.8%59.9%98.3%99.7%6.31%94.1%84.5%98.1%94.9%99.5%98.2%96.4%99.3%99.7%97.2%96.9%12.1%99.3%96.0%
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