Met Feedback Flashcards
Horizontal temp gradient and pressure surface gradient of polar front
No horizontal temp gradient
Max pressure gradient
What satellite for tops of cumuliform cloud
Infrared
Threat associated with airborne weather radar
Heavy precipitation can shield area of severe weather
Range of mixing ratios - (cold continental air and tropical air)
0g/kg and 25g/kg
Why do the roaring forties and furious fifties exist
Fewer land masses in southern hemisphere so wind is faster
Vertical extent of steam fog
500 ft maximum
Role of WMO
Establish and implement together with ICAO, a global regulatory framework for national meteorological services
Vis of:
Haze
Mist
Fog
5000m or less
1000-5000m
Less than 1000m
Speed of warm front
10-15 kts
Vertical extent of shallow fog
6ft/2m
What causes seasonal movement of ITCZ
annual movement of sun
Height and distance of mountain waves
Up to tropopause, 50-100nm avg, rockies is 300nm
Polar maritime stability
Unstable - cold air travelling over relatively warm ocean
Tropical maritime stability
Stable - warm air from Azores high ocean, travelling towards cooler coast
Where is the Ferrell cell
Between Hadley and polar
What aids the condensation process
Micrometric particles and water droplets
Why no TRS in South Pacific?
Ocean is too cold
Mistral
Rhone valley to Mediterranean
Cold, strong katabatic
Gusty
Winter
Bora
Adriatic coast
Gusts - gale force
Pamperos
Southerly Antarctica to South America
4 Stages of mid-latitude occlusion
Cyclogenisis, developed, occlusion, frontolysis
Where is first mountain wave
Just below top of mountain (above inversion
Cold air pool weather
poor visibility, improved performance
Wind for mountain wave
15-20kts
Perpendicular to mountain range
Indication of jet stream core
cirrus cloud streaks
Which force makes air turn left in northern hemisphere
frictional
Define cloud ceiling
Lowest layer of cloud more than 4 oktas
Which climate zone is central europe
Mid-latitude (temperate)
What does ground-based radar detect
Precipitation and intensity
Frontal fog forms how
Evaporation of water from moist ground when warm front passes
How is a cold air pool characterised
Topographic depression filled with cold air
Where is a secondary depression observed
On a cold front
Dangers associated with virga
Cold downdraught due to evaporation
Characteristics of savannah climate
Wet summer, dry winter
Duration of mid-latitude depression
Less than 4 days
What climate is between 30 and 50 degrees
Temperate
Slope of a cold front
1:80
Where does the tropical continental air originate
southern france
How often is a windshear warning updated
every minute
