Q. Which of the following is/are correct inference/inferences from isothermal maps in the month of January?
1. The isotherms deviate to the north over the ocean and to the south over the continent.
2. The presence of cold ocean currents, Gulf Stream and North Atlantic Drift make the isotherms bend towards the north.
Select the answer using the code given below:
Exp) option a is the correct answer.
The isotherms are generally parallel to the latitude. The deviation from this general trend is more pronounced in January than in July, especially in the northern hemisphere.
Statement 1 is correct. In the northern hemisphere, the land surface area is much larger than the southern hemisphere. Hence, the effects of land mass and the ocean currents are well pronounced. In January the isotherms deviate to the north over the ocean and to the south over the continent. This can be seen on the North Atlantic Ocean.
Statement 2 is incorrect. The presence of warm ocean currents, Gulf Stream and North Atlantic drift, make the Northern Atlantic Ocean warmer and the isotherms bend towards the north. Over the land the temperature decreases sharply, and the isotherms bend towards south in Europe.
Source – NCERT – Fundamentals of Physical Geography – Chapter : Solar Radiation, Heat Balance and Temperature
