Met 13

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Met 13
2012-08-19 22:50:53
Fronts Depressions

Met 13
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  1. An Airmass is a large expanse of air in which ??, ??, and ?? are uniform in the (horizontal/vetical) plane.
    • Temp
    • Moisture Content,
    • Temp lapse rate
  2. Airmasses are formed in ?? Regions, most of which are found at (60oN&S/30oN&S) and over (equator/poles)
    • Source Regions,
    • 30o
    • Poles
  3. Cold advection means an airmass from a (warm/cold) region moving toward (warmer/colder) latitudes.
    • Cold
    • Warmer
  4. In southern hemisphere airmassws abbreviatied TmW is travelling generally (North/South)
  5. As a polar maritime Airmass (or Airstream) moves towards Australasian latitudes, it becomes more (Stable/unstable) and as it absorbs moisture, (Cumuliform/stratiform) cloud will develop. Visibility will be (good/poor) except in (showers/rain)
    • Unstable,
    • Cumuliform
    • Good,
    • Showers
  6. As a Tropical maritime Airmass (or Airstream) moves towards NZ, it becomes more (Stable/unstable) and relative humidity within the airmass (rises/falls) Cloud development is usually (Cumuliform/stratiform) which produce (showers/rain)
    • Stable
    • Rises
    • Stratiform
    • Rain
  7. In general, when NZ is effected by a PmK airstream, the (east/west) coast experiences more (rain/showers) than the (east/west) coast, but turbulence is likely to be more pronuonced on the (east/west) coast.
    • West 
    • East
    • ??
  8. When a high level curved airflow slows down, it's vorticity will (increase/decrease) and (convergence/divergence) results. This causes low level air to (converge/diverge)
    • Decrease,
    • Divergence,
    • Convergence.
  9. Absolute vorticity is always (Cyclonic/ Anticyclonic); therefore when relative vorticity is cyclonic, absolute vorticity will (increase/decrease) and (convergence/divergence) will take place.
    • Cyclonic,
    • increase,
    • convergence
  10. The formation and development of a front has it's fundimental cause at (high/low) levels in the atmosphere.
  11. The most common depression in mid latitudes near NZ is the (Polar/Mid-latitude) depression which invariably produces a ??? and a ??? front.
    • Mid latitude,
    • Warm,
    • Cold
  12. The cloud associated with a kata-type cold front is generally (stratiform and cumuliform/cumuliform only) and precipitation (is/is not) widespread.
    • Strat and Cum
    • is widespread.
  13. An ana-type cold front generally moves (quicker/slower) than a kata-type cold front, the cloud band is rather (narrow/wide) and the predominant cloud type is (strato/cumulo)
    • Quicker,
    • Narrow,
    • Cumuliform
  14. when a cold front approaches a given region, the pressure there will initially ??? and when the front has passed overhead, it will ???. The wind will (veer/back) at the front and the temp will (drop/rise). The relative humidity will be (higher/lower) after the front than before it?
    • Fall
    • Rise
    • Back
    • Drop
    • Lower
  15. The cloud associated with a Kata-type warm front is generally (stratiform/cumuliform) which produces (persistent rain/frequent showers)
    • Stratiform
    • Persistent Rain
  16. In an ana-type warm front it (is/is not) likely that cumuliform cloud will be embedded so that precipitation will most likely be (rain/showers/rain & showers)
    • Is
    • Rain and Showers
  17. Clearance of cloud behind a warm front is generally (good/poor) but the clearance behind a kata-type cold front is often (faster/slower) than behind an ana-type warm front.
    • Poor
    • Faster
  18. When a worm front approaches a region, the pressure will initially (rise/fall) and when the front arrives overhead, pressure will (rise/fall/stabilise) and after the front it will ?? or ??.
    the Temp will (increase/decrease) at the front and the wind will (veer/back). Dew point will generally be (higher/lower)
    • Fall
    • Stabilise
    • Stay constant or rise slightly,
    • Increase,
    • Back,
    • Higher.
  19. In a cold occlusion, the temp behind the cold front is (warmer/colder) than the temp in advance of the cold front?