AGRY 335 Exam I Part II

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  1. Teten’s Formula
    The empirical formula of the relation of dew point and temperature
  2. How is global warming causing more storms?
    • More moisture in air
    • more sever storms
    • same rainfall in shorter amount of time
  3. HYGRISTOR
    • Humidity sensor
    • glass/plastic strip covered with moisture sensitive film of LiCl, w/ metal edges
    • measures resistance of the chemical changes
    • outside air has to pass it
    • on radiosondes
  4. THERMISTOR
    • measures temperature
    • Ceramic covered metallic rod
    • resistance changes with air temp
  5. ASOS Modules for anaysis
    • Sensor Module: Measure parameters (temp, dewpoint, etc.)
    • Data Collection: Collects & preprocesses the data (hourly)
    • Cenetral Data Platform: Competes data processing (apply algorithms)
    • Data Distribution: Provides final output
  6. Image Upload
    • Liquid Precipitation Accumulation Sensor
    • tipping bucket
    • heated to melt frozen precip
    • ~.01 in
  7. Image Upload
    • Hygrothermometer
    • dewpoint
    • Chilled mirror and optical system
    • aspirator and transmitter
    • air temperature is easier to measure than dew point
  8. Image Upload
    • Freezing Rain Sensor
    • Vibrating probe, frequency ∆ = ice
    • checks with LED weather indicator if it is preciping
  9. Image Upload
    • Cloud Height Sensor / Ceilometer
    • invisible laser radiation to detect cloud levels
    • like sonar
  10. Image Upload
    • Visibility sensor
    • Uses forward scatter technique (Xe)
    • Photometer- day/night
  11. Image Upload
    • Light Emitting Diode Weather Indicator / Weather Sensor
    • Precip Type and amount
    • Weather-particle-induced optical scintillation
  12. Image Upload
    • Wind Sensor
    • speed & direction
    • physically aligned to north
    • Anemometer- photo interrupter counts
    • Potentiometer- direction, voltage level
    • heated
  13. Thunderstorm Sensor
    detects cloud-to-ground and cloud-cloud discharges
  14. Ground to air radio
    • GTA
    • updates pilots on conditions
    • METAR format
  15. Absolute Humidity
    • h
    • kg/m3
    • doesn't change with temp
    • amount of water vapor in the air
  16. Specific Humidity
    • Mass of water vapor existing in a given mass of air
    • kg/kg
    • g/kg
  17. Saturation specific humidity
    • hsat
    • max water vapor that can exist
    • changes with temperature
  18. Mixing ratio
    • r
    • when other gases are used
    • mass of water vapor to any other gas
    • Saturation mixing ration- maximum possible
  19. Relative humidity
    • q
    • RH = (q/qsat) x 100
    • can ∆ w/ temp
  20. Aspirated Hydrometer
    • swing around in air
    • moist and dry thermometer
  21. Vapor Pressure
    • the part of the total atmospheric pressure due to water vapor
    • depends on temp and density
  22. CAPE
    • Convectional available potential energy
    • Higher the CAPE more potential for thunderstorms
  23. CIN
    • Collective inhibitor
    • Higher CIN = stable
    • Low CIN w/ High CAPE = Thunderstorms
  24. Adiabatic
    assumes no exchange btw air parcel and atmosphere
  25. Dibatic
    • exchange of air
    • cloud growth
    • boundary layer growth
  26. Lapse Rate
    • Rate at which air temp is decreasing w/ height
    • ELR- environment for more than DALR/MALR is unstable
    • DALR- dry ariabtic, 10 C/km
    • Conditionally Stable
    • MALR- moist ariabtic, 5 C/km
  27. LCL
    • Lifting Condensation level
    • where clouds form
    • occurs where dew point = temperature
  28. Vertical Mixing
    • Frontal Lifting: warmer air pushed up by cold air
    • Convergance: land/sea breeze- H @ sea surface, L @ land surface
    • Orographic Lifting: Lifted up mountians
    • Local Convergence: N. Hemisphere- anticyclone air goes up, right hand rule
  29. Chilled Mirror Hydrometer
    Image Upload
  30. Signs for unstable:
    Lifted Index
    Showalter Index
    K-Index
    CAPE
    Total of Totals
    SWEAT Index
    • Lifted Index: Negative
    • Showalter Index: Negative
    • K-Index: Large Positive
    • CAPE: Large Positive
    • Total of Totals: Large positive
    • SWEAT Index: Large positive
  31. Cloud development
    • Horizontal: Stratus
    • Vertical: Cumulus
    • Low- 1500m Stratus
    • Mid- 5000m Alto
    • High- 8km Cirus
    • Nimbus- moisture for rain
  32. Image Upload
    Cirus
  33. Image Upload
    Altocumulus
  34. Image Upload
    Stratus
  35. Image Upload
    Stratocumulus
  36. Image Upload
    Cumulus humilis
  37. Image Upload
    Cumulus congestus
  38. Image Upload
    Cumulonimbus
  39. Entrainment
    • how clouds grow
    • when excess air is coming into area
  40. CDD & HDD
    • Heating/Cooling degree days
    • how to calculate bill
    • HDD= mean < 65, 65-mean
    • CDD= mean > 65, mean-65
  41. Decode
    KLAF 030445Z 35007KT 15SM SKC 17/13 A2986
    • KLAF: 4 Letter station ID
    • 030445Z: Date 03/Time0445Z 24hour
    • 35007KT: Wind direction, 350˚form N, 07 speed in KT (knots)
    • 15SM: visibility 15 Stratus Miles
    • SKC: Sky conditions- skyclear
    • 17/13: Temp/dew point
    • A2986: altimeter setting, in. o Hg
  42. METAR sky conditions
    • SKC- sky clear
    • FEW (1-2/8)
    • SC- scattered clouds
    • BKN- broken (5-7/8)
    • OVC- overcast
Author:
Anonymous
ID:
202847
Card Set:
AGRY 335 Exam I Part II
Updated:
2013-02-24 19:41:58
Tags:
Weather Climate
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Description:
weather and climate exam I part II
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