Explain the distribution of temperature in January.

(i) In January the isotherms deviate to north over the ocean and to the south over the continent. This can be seen on the North Atlantic Ocean.
(ii) The pressure of warm ocean currents, Gulf Stream and north Atlantic drift, make the northern Atlantic Ocean warmer and the isotherms bend towards the north.
(iii) Over the land the temperature decreases sharply and the isotherms bend towards south in Euprope.
(iv) It is much pronounced in the Siberian plan. The mean January temperature along ${60}^{\circ }E$ longitude is minus ${20}^{\circ }\text{both at}{80}^{\circ }N\text{and}{50}^{\circ }N$ latitude. The mean monthly temperature for January is over ${27}^{\circ }C$ in equatorial oceans over ${24}^{\circ }C$ in the tropics and $2^{\circ }C-0^{\circ }C$ in middle latitudes and $-{18}^{\circ }C\text{to}-{48}^{\circ }C$ in Eurasian continental interior.
(v) The effect of the ocean in well pronounced in southern hemisphere. Here, the isotherms are more or less parallel to latitudes and the variations in temperature is more gradual than in the northern hemisphere. This isotherm of ${20}^{\circ }C,{10}^{\circ }C,\text{and}{0}^{\circ }C$ run parallel to ${35}^{\circ }S,{45}^{\circ }C\text{and}{60}^{\circ }S$ latitudes respectively.