The isotherms in the northern hemisphere are more curved while those in the southern hemisphere are almost parallel to the Equator. Why?

The isotherms in the northern hemisphere are more curved while those i

1.	The isotherms in the northern hemisphere are more curved while those in the southern hemisphere are almost parallel to the Equator. Why?
Answer» There are both continents and oceans in the northern hemisphere. There exists difference in the heating of land and water. Compared to the oceans, the land area becomes hot soon. So the isotherms in the northern hemisphere are more curved. Oceans constitute the most part of the southern hemisphere. Land area is very small there. So the isotherms in the southern hemisphere are almost parallel to the Equator.