the air mass over the ocean is warm
thermals is rising_currents_of_warm_air. air_mass is atmosphere. air_mass is not atmosphere. high is air_mass. ocean is not great_mass_of_water. sun is hotter_than_ocean. ocean is deep_body_of_water. ocean is great_mass_of_water. sun is not hotter_than_ocean. ocean is large_open_body_of_water.