Question 3 The image below shows outgoing terrestrial long-wave radiation (OTR,

Question

Question 3 The image below shows outgoing terrestrial long-wave radiation (OTR, in units of W m2). The image represents average conditions and includes the effects of clouds. First, describe the main features of the pattern [2 marks]. Second, interpret the pattern in simple terms [2 marks]. Hint: think about which climatic parameters influence the amount of outgoing terrestrial radiation. [4 marks in total] 90-Day Average OLR 2012/10/19-2013/01/16 ON 30N 60S 905 0 30E 60E 90E 120E 150E 180 150W 120W OW 60W 30W

Explanation / Answer

The energy radiated from the earth's surface is known as Outgoing Longwave Radiation(OLR).

The figure depicts a pattern which shows a decrease in the amount of energy radiated from the earth as one moves from the equator to the poles.

The highest radiated energy is found to be at around Arabian Sea gulf and northern Africa due to the presence of desert (Sahara).This is due to the reason that deserts emit heat as quickly as they absorb.Albedo which is another factor affecting the OLR is also higher in the tropics due to all year round illumunation.

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