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An Airmass is a large expanse of air in which ??, ??, and ?? are uniform in the (horizontal/vetical) plane.
- Moisture Content,
- Temp lapse rate
Airmasses are formed in ?? Regions, most of which are found at (60oN&S/30oN&S) and over (equator/poles)
Cold advection means an airmass from a (warm/cold) region moving toward (warmer/colder) latitudes.
In southern hemisphere airmassws abbreviatied TmW is travelling generally (North/South)
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)
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)
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.
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)
Absolute vorticity is always (Cyclonic/ Anticyclonic); therefore when relative vorticity is cyclonic, absolute vorticity will (increase/decrease) and (convergence/divergence) will take place.
The formation and development of a front has it's fundimental cause at (high/low) levels in the atmosphere.
The most common depression in mid latitudes near NZ is the (Polar/Mid-latitude) depression which invariably produces a ??? and a ??? front.
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.
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)
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?
The cloud associated with a Kata-type warm front is generally (stratiform/cumuliform) which produces (persistent rain/frequent showers)
- Persistent Rain
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)
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.
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)
- Stay constant or rise slightly,
In a cold occlusion, the temp behind the cold front is (warmer/colder) than the temp in advance of the cold front?