Air humidity

    Said the amount of water vapor the air is dry degree of physical quantities, known as air humidity. Humidity size commonly used vapor pressure, absolute humidity, relative humidity and dew point temperature said. Public weather forecast is the most commonly used relative humidity.
    Air relative humidity is the actual water vapor content (absolute humidity) and with the saturation temperature and humidity (maximum possible water vapor content) The percentage of the value. It is a comparative figure, it does not mean that the air humidity absolute size. 
    In a certain temperature conditions, a certain volume of air that can only accommodate a certain amount of water vapor. If the amount of water vapor in the air to accommodate the water vapor to the limit when the air reached saturation point, relative humidity of 100%. The saturation point, the water is no longer evaporation. Summer heat encountered such weather, the secretion of sweat to evaporate and sultry feel intolerable. Instead, the fall will sometimes encounter high temperatures this "hot", but significantly lower humidity, Chang Han people felt they could not "boring." If the winter weather encountered low temperature and high humidity, it will feel damp cold. Air humidity is too small, the same people would feel uncomfortable. Beginning southerners north, the coastal people shout to the northwest region often feel Kousao dry lips, and even nosebleed. Of course, this is the problem of adaptation.
    In general, the relative humidity and temperature variation of the diurnal variation contrary, the maximum value before and after sunrise. minimum in around 14:00. Of course, when a certain weather mutations, such changes in humidity law will be undermined. Such as high temperature and low humidity afternoon, dark clouds suddenly rolling, moist air highway, which the local humidity will quickly shocks.
    Relative humidity changes, the more complex, often rainy season high humidity, sunny weather with low humidity, But around the geographical conditions and the temperature conditions of the rainy season and very different, difficult to outline a universal law.
    Viewers friends will note, when a precipitation forecasting imminent, Forecasters often is a high-altitude situation forecast map, the map used red arrows indicate the moist southwest flow, blue arrows indicate the dry and cold from the north wind, and the prediction that this two incoming intersection in a district, have a strong rainfall.
    Of course, this is a lot of rainfall the two factors, is a visual icon. However, it at least shows that the two meanings : First, the warm air flow from the South in general, when cold, dry air from the north; Second, warm air generated precipitation is the indispensable basic conditions.
    In fact, water vapor in the air from the part of the surface on its rivers, lakes and moist soil evaporation, Another part (in many cases is a major part) from tropical areas, especially tropical sea surface. Located in southeastern China and Europe, therefore, south or southwest wind normally carry warm air, Northwest and the dry and cold air is synonymous with. From spring to summer, hot and humid in the West Pacific subtropical high northward march, China from the south to the north has entered the hot and humid rainy season. From autumn to winter, from the Siberian cold air dry gradually southward invasion The country also from north to south, low humidity has gone through the drier time.

"Air humidity," by definition refers to air vapor contained the size, the greater the humidity of the atmosphere is more humid, saturated vapor from the more recent. Normally, we used to express the relative humidity of air humidity size. Certain temperature conditions, the smaller the relative humidity of the air, the faster the evaporation of human sweat, the more cool feeling. Winter season, humidity is low, and people often had the feeling of not SHU, sometimes there chapped lips, nose bleeding, dry throat tickle and so on. However, in the summer, air humidity over 80%, due to slow evaporation Sweat, people will be feeling the heat intolerable. sometimes trigger sunstroke or kidney problems, tuberculosis, arthritis and other diseases.

¡¡¡¡Chamber more comfortable weather conditions : 25 ¡ã C to room temperature, the relative humidity should be 40-50% in the appropriate control, at room temperature up to 18 ¡ã C, relative humidity of 30-40% should be in control. A humidifier, the family should always pay attention to regulate indoor humidity, in order fully to your health services.