Question

Diurnal range of temperature is ___________.
1. Difference between maximum and minimum temperature of different days.
2. Difference between maximum and minimum temperature on the same days.
3. Both A and B
4. None of these

Answer 1

Hint:
In Meteorology, the diurnal temperature variation is the difference in the temperature on the same day and the difference in temperature recorded over a year is called the annual range of temperature.
Desert regions have the greatest diurnal-temperature

Complete answer:
The diurnal temperature range (DTR) is the difference between the maximum and minimum temperature on the same day. The changes occurring in DTR have multiple causes such as aerosols, water vapour, greenhouse gasses cloud cover, change in the land use and urban heat.

The effects in different regions are because of different factors. The net photosynthesis is mostly related to the high day time, large diurnal temperature and low nighttime temperatures.

The range of diurnal temperature increases with the distance from the sea level and to the places where the solar radiation is strongest, this is mostly in the dry tropical climates and on the high mountain plateaus. This reduces the thickness of the atmosphere to be traversed by the Sun’s rays.

The usual difference between the day’s highest and lowest temperatures is 3-degree celsius In January.

Therefore the answer is 2. Difference between maximum and minimum temperature on the same days.

Note:
According to some researchers, the diurnal temperature range (DTR) is evidence of “Climate Change” and other scientists say that the decrease in the diurnal temperature range (DTR) is levelled in the 1990s.
Usually, high desert regions have the greatest diurnal-temperature variability, while usually low-lying humid areas have the least.