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UH GEOL 1350 - Humidity
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Geology 1350 Lecture 7 Outline of Last Lecture I. Reasons for seasonsOutline of Current Lecture I. humidity II. condensation III. cloudsCurrent LectureClouds are outsideStructure of waterWater- hydrogen(water-2 (1 electron))2o-(oxygen heavier-1(lots of electrons)takes away hydrogen electron becomes negative) (no color) ; angle is important Molecules stay together due to the bonds of hydrogen with oxygen If there is pollution there is ions that come togetherWater is more important greenhouse gas most prominent is carbon dioxideWater has the highest heat capacity and surface tension (ants can walk on water)High albedo when snow(95%) and clouds(90%) are white Gas, liquid, iceHydrological cycle-water cycle (condensation, precipation, run off etc.Most of water in oceans (salt water)Atmosphere contains only 1 week supply of precipationAbsolute humidity-just think of an air parcel mass(doesn’t change/volume (raising vol on surface will expand)These notes represent a detailed interpretation of the professor’s lecture. GradeBuddy is best used as a supplement to your own notes, not as a substitute.Specific humidity- whatever inside balloon remains the same the size expandsMixing ration-mass of volume/mass of dry airVapor pressure e- the more gas the more pressure Saturation vapor pressure es- molecules going out and in ; when the number is equal this is saturation (leaves wet surface)Sublimation-cold ice into gas (particles goingup)More particles getting into the surface than out it is condensationMore particles getting out of the surface than in is evaporationBelow 0 degrees C we can have water and iceHigher energy in water than in ice; over ice only few saturation vapor pressure Dew point temp(morning before sunrise); when you see condensation (water on car, plants) when you cool the humidity - never higher than ambient temp, it can be equal or lower, more water vapor when there is a huge differentRelative humidity- relative percentage- decrease during the dayMore water vapor in dessert than international fallSpecific humidity vs. saturationMore water vapor in the tropics than in then poles, in the poles there are dry airQuite humid over the poles because the air in the poles cant hold much water (20 degrees)Along the equator we got a tropical jungleHumidity variable- relative humidity 20%(little humidity) 40% 60% 80% 100%(lots of humidity)Would rh increase or decr. In the afternoon from the morning? Morning is cold with dew, warms up later in day __decreaseRelative humidity in afternoon___(vapor pressure morning 12 mb/saturated vapor pressure afternoon 42 mb)*100=28%Dew decreases throughout the day because evaporation comes inRelative humidity and comfort-in order to cool down body you have to sweat and water on body has to evaporateHeat index and safety-if you cant get rid of your humidity you cannot cool downSling psychrometer-2 thermometers, contains a wet bulb once it drys it will have the same temp as the other one, if both have the same


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UH GEOL 1350 - Humidity

Type: Lecture Note
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