GS PrelimsGeography (Physical)Distribution of Temperature and Pressure2010

A geographic area with an altitude of 400 metres has following characteristics : Month J F M A M J J A S O N D Average maximum temp. °C 31 31 31 31 30 30 29 28 29 29 30 31 Average minimum temp. °C 21 21 21 21 21 21 20 20 20 20 20 20 Rainfall (mm) 51 85 188 158 139 121 134 168 185 221 198 86 If this geographic area were to have a natural forest, which one of the following would it most likely be?

A

Moist temperate coniferous forest

B

Montane subtropical forest

C

Temperate forest

D

Tropical rain forest

Correct Answer: Option D

Explanation

1. The provided climate data indicates high average maximum temperatures (around 30-31°C) and high average minimum temperatures (around 20-21°C) throughout the year. This temperature regime is characteristic of tropical climates. 2. The rainfall data shows significant precipitation (over 1500 mm annually) distributed across all months, indicating consistently moist conditions. 3. An altitude of 400 metres is relatively low. 4. Typically, high temperatures and high year-round rainfall at low altitudes support Tropical rain forest (Option D). 5. However, the provided (unofficial) answer key indicates (A) Moist temperate coniferous forest. Standard climate classification does not align this forest type with the given high temperatures. Temperate forests require significantly lower average temperatures. Accepting the given answer 'A' implies a specific, non-standard interpretation possibly related to a unique microclimate or specific species at that altitude and moisture level, which deviates from general biogeographic principles. [Note: Based on data alone, Tropical Rainforest (D) appears more appropriate].

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