Using the isotherm maps of average January and July sea level temperatures they are influenced by latitude, season, land-water contracts and ocean currents on global tempature patterns. Using complete sentences explain why the following isotherms vary in temperature in the northern hemp i sphere on the maps between the two times of years:
January -1 C (30 degree F) isotherm in the northern hemisphere
July 21 C (70 degree F) isotherm in the northern hemisphere