PPT-Class #3: Humidity, condensation, and clouds

Chapters 4 and 5 1 Class 3 July 9 2010 Atmospheric Humidity Chapter 4 2 Class 3 July 9 2010 Circulation of Water in the Atmosphere A general definition of humidity is the amount of water vapor in the air. Forms of Condensation . and Precipitation. Notes. Cumulonimbus Cloud. Cloud Formation. Clouds. – visible aggregate of minute droplets of water, or tiny crystals of ice, or a mixture of both.. Clouds are a form of condensation produced when water vapor condenses in the atmosphere. The cloud formation process includes adiabatic cooling, and condensation of water vapor as a parcel of air rises above the lifting condensation level.. Malcolm Thornton. Managing Director, Proten Services. What is the PCA?. The Property Care Association (PCA) is the trade association representing members, promoting best practice and providing technical guidance in the following sectors:. “. Breathe easy…. ”. Cost effective solutions. for condensation and mould. 1 in 5 properties in the UK still suffer from Condensation. Why?. What is the problem?. Our role - to provide you with information on Condensation and Mould. Cloud Formation. Condensation can form dew, fog, or clouds. Condensation is when water vapor changes to a liquid. . Condensation must have saturation to happen. . Air Compression and Expansion. When air is compressed, the motion of the gas particles increases and the air temperature increases. . Water Cycle:. Ice – solid. Water – liquid. Water Vapor – gas. 3 States of Water in Atmosphere. Water in the atmosphere. Humidity. Warm air can hold more water than cold air. Dew point and relative humidity are related. 23-2. Clouds. Small water droplets or ice crystals that fall through air. Fog is a cloud that forms near the surface. Formation. Solid surface are needed for water vapor to condense on. Troposphere – lower layer of atmosphere. Meteorology. Meteorologist. Meteorologists can predict the weather by analyzing and . interpreting data . from . observations. and . tools: . C. urrent . weather . conditions. W. eather maps. Satellites. Jassem. al . Majed. abdulAziz. al . hashash. Fawaz. al . enezi. Abdullah . bahzad. vocabulary. Evaporation. Condensation. Precipitation. Humidity. Saturation. Relative humidity. Dew point. Cirrus. Clouds. Precipitation . Weather is affected by the amount of water in the air.. . Don’t forget. transpiration.. Humidity. the amount of water vapor (moisture) in the air. warm. air can hold more moisture. Chapter 4- Weather and the Water Cycle. TABLE OF CONTENTS. SLIDE ONE- evaporation. SLIDE TWO- condensation. SLIDE THREE- precipitation. SLIDE FOUR- forms of precipitation. SLIDE FIVE- tornadoes. SLIDE SIX- hurricanes. The Water Cycle. Factors that Affect Evaporation. Evaporation Simulation: MUST OPEN IN EXPLORER. https://www.fossweb.com/delegate/ssi-wdf-ucm-webContent/Contribution%20Folders/FOSS/multimedia_2E/Variables_MM/activities/whiteboard/evaporation/Main.htm. Water . Vapour. in Atmosphere. Amount of water . vapour. in atmosphere (. humidity) is . measured by, an instrument called hygrometer.. Significance of Atmospheric Moisture. • Water . vapour. absorbs . 5. Water in the atmosphere – in all its phases. Last week, we focussed on the weather systems found in the mid-latitudes.. The heart of the mid-latitudes is the polar front, where warm, tropical air from the south meets cold, polar air from the north.. Global Hydrological Cycle. Thermodynamic properties of water. Humidity: Water Vapor in the Air. Vapor pressure . Absolute humidity. The mixing ratio . Specific humidity. Relative humidity . Relative Humidity.