0 the temperature at which air can no longer hold all the water in it, and the water starts to form drops on surfaces -- 露點，露點溫度（空氣中所含的氣態水達到飽和而凝結成液態水所需要降至的溫度）
But local conditions within the flues and chimneys may bring the temperature of the surfaces below the acid dewpoint while the emission temperature may be above any practical specified minimum.
As the temperature is cooled to the dewpoint, water vapor condenses upon available cloud condensation nuclei, and forms a cloud.
Areas with small dewpoint depressions and are below freezing indicate the presence of icing conditions for aircraft.
Extratropical cyclones are classified mainly as baroclinic, because they form along zones of temperature and dewpoint gradient known as frontal zones.
Where exactly the dewpoint will fall in (or out) of those thickened wallsand in what climate zonebecomes crucial.
The roadway has implanted devices that measure surface condition, dewpoint, wind speed and direction, visibility, air temperature and other parameters.
The term dry-bulb is customarily added to temperature to distinguish it from wet-bulb and dewpoint temperature.
Elements in the plot show the key weather elements, including temperature, dewpoint, wind, cloud cover, air pressure, pressure tendency, and precipitation.
