Clouds form as relatively warmer air carrying moisture rises within cooler air. This keeps the warm surface waters floating above the cooler deeper waters. Warm seawater expands and is thus less dense than cooler seawater. Grey skies, breezy conditions, higher humidity and cooler temperatures prevail. Autumn features warm afternoons and sharply cooler evenings. Climates during the Pliocene became cooler and drier, and seasonal, similar to modern climates. It is planted in containers in cooler temperate climates. A common commercial refrigerator is the glass fronted beverage cooler. The hot air is less dense than surrounding cooler air. Fall is marked by mild to warm days and cooler nights. However, the activity of the enzyme increases in cooler temperatures. Some species are commonly grown indoors as ornamental houseplants in cooler climates. The Peltier coefficient depends on temperature and the materials the cooler is made of. The opposite is true for the role of cholesterol in cooler temperatures. The oil cooler and radiator are also very similar.