Analyzing Statement 1: Tropical Zone and Diurnal Temperature Range

Statement 1 claims that due to Southern India being in the tropical zone, the diurnal range of temperature is high. This is incorrect.

Regions in the tropical zone, especially coastal areas like much of Southern India, typically experience a low diurnal temperature range. This is because:

• High humidity and cloud cover moderate daytime heating and nighttime cooling.
• Proximity to the equator results in consistent solar insolation throughout the year.
• The moderating influence of the nearby seas prevents extreme temperature fluctuations between day and night.

High diurnal ranges are generally characteristic of continental interiors or arid/semi-arid regions, not typically the tropical coastal areas of Southern India.

Analyzing Statement 2: Continental Influence and Coastal Annual Temperature Range

Statement 2 suggests that due to continental influence, the annual mean range of temperature is greater in the coastal regions of Southern India. This statement is also incorrect.

Coastal regions are primarily influenced by the sea, not the continent. The sea has a high heat capacity, moderating temperature changes.

• This maritime influence leads to a relatively low annual mean temperature range in coastal areas (i.e., cooler summers and milder winters compared to inland areas).
• Continental influence, conversely, results in greater annual temperature ranges, with hotter summers and colder winters, typically observed in interior landmasses far from oceanic effects.

Therefore, the annual mean temperature range is generally lower, not greater, in the coastal regions of Southern India due to maritime influence.

Conclusion on Statements

Since both statement 1 and statement 2 are incorrect regarding temperature variation in Southern India, the correct option is that neither statement is correct.