HUMIDITY Chapter 17 Test 4 material. ASSIGNMENT – 10 POINTS WRITE A 1 TO 2 PAGE REPORT ON “THE...
-
Upload
angel-wade -
Category
Documents
-
view
214 -
download
0
Transcript of HUMIDITY Chapter 17 Test 4 material. ASSIGNMENT – 10 POINTS WRITE A 1 TO 2 PAGE REPORT ON “THE...
HUMIDITY
Chapter 17Test 4 material
ASSIGNMENT – 10 POINTS WRITE A 1 TO 2
PAGE REPORT ON “THE IMPACT OF THE TRI-STATE TORNADO IN ILLINOIS”
DUE IN ONE WEEK
WATER SOURCES OCEANS ICE SHEETS & GLACIERS GROUNDWATER LAKES ATMOSPHERE STREAMS
HYDROLOGIC CYCLE ALSO KNOWN AS WATER CYCLE
WATER MOVING FROM EARTH TO ATMOSPHERE EVAPORATION - WATER CHANGES
FROM LIQUID TO VAPOR
TRANSPIRATION - WATER TAKEN UP THROUGH PLANT ROOTS
SUBLIMATION - WATER CHANGES FROM SOLID TO VAPOR
EVAPOTRANSPIRATION - SUM TOTAL OF EVAPORATION & TRANSPIRATION TOGETHER
WATER MOVES FROM ATMOSPHERE TO EARTH CONDENSATION - WATER
CHANGES FROM VAPOR TO LIQUID
DEPOSITION - WATER CHANGES FROM VAPOR TO SOLID
PRECIPITATION
HUMIDITY AMOUNT OF WATER VAPOR IN THE
AIR
DOG DAYS OF SUMMER - COMBINATION OF HEAT & HUMIDITY FROM MID-JULY THROUGH MID-AUGUST
SPECIFIC HUMIDITY ALSO KNOWN AS THE MIXING RATIO
DESCRIBED AS THE MASS (WEIGHT) OF WATER VAPOR PER MASS OF DRY AIR
GRAMS (WATER) / KILOGRAM OF AIR G/KG
RELATIVE HUMIDTY % OF THE MAXIMUM AMOUNT OF
WATER VAPOR (SATURATION) THAT AN AIR SAMPLE CAN HOLD (KEEP IN SUSPENSION) AT A GIVEN TEMPERATURE
CAN CHANGE WHEN EITHER THE TEMPERATURE OR THE AMOUNT OF WATER VAPOR CHANGES
WITH NO CHANGE IN WATER VAPOR CONTENT AS THE TEMPERATURE INCREASES
THE RELATIVE HUMIDITY WILL GO DOWN
AS THE TEMPERATURE DECREASES THE RELATIVE HUMIDITY WILL GO UP
MAXIMUM WATER VAPOR PER TEMPERATURE
TEMPERATURE GRAMS/KG OF AIR90 4080 3070 2060 1050 540 2
RELATIVE HUMIDITY CHANGES WHEN: DAILY TEMPERATURES CHANGE
AIR MOVES FROM ONE PLACE TO ANOTHER
AIR MOVES UP OR DOWN IN THE ATMOSPHERE
SATURATION WHEN THE RELATIVE HUMIDITY IS
100% FOR A GIVEN TEMPERATURE IF THE AIR IS LESS THAN 100%
RELATIVE HUMIDITY IT IS UNSATURATED AIR
IF THE AIR IS ABOVE 100% RELATIVE HUMIDITY IT IS SUPERSATURATED
DEW POINT TEMPERATURE TEMPERATURE AT WHICH
SATURATION OCCURS FOR A SPECIFIC AMOUNT OF WATER VAPOR
AS THE AMOUNT OF WATER VAPOR CHANGES SO DOES THE DEW POINT TEMPERATURE
RELATIVE HUMIDITY MEASURING INSTRUMENTS SLING PSYCHROMETER HAIR HYGROMETER HYGROGRAPH
LIFTING CONDENSATION LEVEL - LCL THE ALTITUDE TO WHICH AN AIR
PARCEL WOULD NEED TO BE LIFTED FOR CONDENSATION TO OCCUR
VISIBLE EVIDENCE IS THE CLOUD BASE
OCCURS AT SATURATION/DEW POINT TEMPERATURE
DRY ADIABATIC LAPSE RATE (DALR) TEMPERATURE DECREASE
EXPERIENCED BY A RISING UNSATURATED PARCEL – ABOUT 1 DEGREE CELSIUS PER 100 METERS OR 10 DEGREES/1000 METERS
SINKING PARCELS WARM AT THE SAME RATE
DALR
DALR PROBLEM
THE SURFACE TEMP IS 20 DEGREES C & THE DEW POINT IS 5 DEGREES C, HOW MANY METERS MUST THE AIR RISE TO REACH THE LCL?
ANSWER: 15 DEGREES X 100 METERS = 1500 METERS OR 1.5 KILOMETERS
WET ADIABATIC LAPSE RATE RATE OF TEMPERATURE CHANGE
FOR A RISING SATURATED PARCEL OF AIR
ON THE AVERAGE IT IS ABOUT 5 DEGREES C/ 1000 METERS
WALR PROBLEM AT THE SURFACE THE TEMP IS 25
DEGREES C AND THE DEW POINT IS AT 15 C, WHAT WILL THE TEMP BE AT 4000 METERS ABOVE THE SURFACE?
ANSWER: 0 CELSIUS – [25 – (DALR = 10 DEGREES/1000 METERS) = 15] 15 – (WALR = 5 DEGREES/1000 METERS) = 15 {15 – 15 = 0}
EFFECTS OF VERTICAL MOVEMENT OF AIR WHEN AIR RISES IT EXPANDS AND
COOLS. AS IT COOLS, ITS RELATIVE HUMIDITY GOES UP
WHEN AIR SINKS IT IS COMPRESSED AND WARMED. AS IT WARMS ITS RELATIVE HUMIDITY(RH) GOES DOWN
RATE DEPENDS ON THE AIR’S RH