The heliograph
Insolation is when the Sun shines above the horizon on a given point of the Earth. This is measured by means of a helio-phano-graph, which consists of a spherical lens that concentrates the Sun’s rays on to a strip of special thermal paper that blackens when hit by the Sun’s rays that have been concentrated by the lens.
The energy received from a given surface, instead, is called global radiation, and is measured with an instrument called pyranometer or solarimeter, and is expressed in calories per unit of time per surface unit.
Special reports
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29 April 2020
Lightning
Man has always been afraid of lightning, in fact in the past lightning was considered a sign of the anger…
11 December 2013
Typhoons, hurricanes and cyclones
On November 8, 2013 typhoon Haiyan hit the Philippines with winds...
29 April 2014
What will the climate be like?
Latest news regarding the Fifth Assessment Report (Part 1)...
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30 May 2014
Latest news regarding the climate
Most salient news from the Fifth Assessment Report(Part 2)
27 March 2012
Rio and the Conventions
In the past years we have heard and read a lot about climate change...
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10 February 2014
Coral turns pale!
The coral reef is one of the ecosystems with the richest biodiversity...
15 November 2021
How did Cop26 end?
On Saturday afternoon in Glasgow, representatives of more than 200 countries attending the COP26 United Nations climate change conference reached…
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29 April 2020
Lightning
Man has always been afraid of lightning, in fact in the past lightning was considered a sign of the anger…
11 December 2013
Typhoons, hurricanes and cyclones
On November 8, 2013 typhoon Haiyan hit the Philippines with winds...
-
29 April 2014
What will the climate be like?
Latest news regarding the Fifth Assessment Report (Part 1)...
30 May 2014
Latest news regarding the climate
Most salient news from the Fifth Assessment Report(Part 2)
-
27 March 2012
Rio and the Conventions
In the past years we have heard and read a lot about climate change...
-
29 April 2020
Lightning
Man has always been afraid of lightning, in fact in the past lightning was considered a sign of the anger…
-
11 December 2013
Typhoons, hurricanes and cyclones
On November 8, 2013 typhoon Haiyan hit the Philippines with winds...
-
29 April 2014
What will the climate be like?
Latest news regarding the Fifth Assessment Report (Part 1)...
From the Multimedia section
Facts
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Radars in meteorology
Radar (acronym for radio detection and ranging) monitoring techniques are used to...
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7 April 2011
Weather over the Mediterranean Sea
The weather in the Mediterranean areas is generally...
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13 May 2011
Meteorological satellites
Meteorological observations from satellites are at present the most...
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7 April 2011
GOES meteorological satellites
The numerous civil and military satellites orbiting around us...
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13 May 2011
Meteorological satellites
Meteorological observations from satellites are at present the most...