Fronts And Frontal Depression

Question 1

Cyclogenesis

Answer 1

Is the-name used to describe a development of low pressure

High level divergence is the main issue of low pressure

Jet streams forms due high level divergnce

Answer 2

Wave of polar fronts
(Travel to east)
Locationtion in the westerly ,can expect waves of rain (1-2 days breaks in between)

Question 3

Polar air depression (over water)

Answer 3

Most polar air depressions are in&raquo_space;norwegian sea, barents sea, sea of japan,gulf of alska
Because of the difference between cold air masses and warm seas

Question 4

Frontogenesis

Frontolysis

Answer 4

FRONTOGENESIS»formation of a fronty

Frontolysis»decay /dissipation of a front

Answer 5

In. A polar front check the warm sector lines to see the direction of the front

Answer 6

~Warm front»warmer air advances on colder air
~cold front» cold air adavnces on warmer air
~occluded front» cold front rises or undercuts the warm fron

Question 7

Warm front

Answer 7

Moves relatively slow (10kts)
Slope 1:150
CI,CS,AS,NS,ST

Question 8

Warm fron t hazards

Answer 8

~freezing rain in winter
~low cloud over large area
~icing in cloud
~poor visibilty in heavy rain/low cloud/frontal fog
~aquaplanning  on wet runways
~cat areound jet sttrream

Question 9

Passage warm front

Answer 9

800km ahead of the surface front
~warm front approaches»pressure reduces ,lowering cloud with -ra
~warm front»RA/DZ,pressure minimum ,wind veers,increase in temperature
~after warm front»warm sectro ocnditions,pressure slight increase

WARM SECTOR
~LOW CLOUD,INTERMITTENT,DRIZZLE,POOR VISIBILTY
~TEMPERATURE IS OFTEN MILD
~IN SUMMER ,CLOUD MAY BURN OFF,POSSIBLE FORM OVER CONTINENTAL AREAS
~A DEPRESSION MOVES IN THE DIRECTION OF THE GEOSTROPHIC WIND BLOWING PARALLEL TO HE ISOBARS INSIDE THE WARM SECTOR

COLD SECTOR
~typical cumuls copuld develpment just ahead of cold front
~tyhe slope is steeper than the warm front. 1:50
~travels quicker 20-20kts
200/300km from the surface
St,cb,as,cs,ci.
Rememeber after cold front there a CU

Question 10

Flying hazard in cold front

Answer 10

~severe turbulence in cb
~sevre icing in cb
~lightning from thnuderstorm
~abrupt change in wind direction passing through front
~windshear associated with gust
~poor visubity
~cat
~aquaplaning

Cold front approaches&raquo_space;slight pressure reduction
At cold front»+RA with cb ,pressure minimum ,wind veers,decreases in temp
after cold front»pressure increase,good visibility but isolated TCU/CU

Question 11

Warm occlusion

Answer 11

When the coldest air is in front,the warm air is aloft and the less cold air is behind.
More likely in winter

Question 12

Cold occlusion

Answer 12

Cold air is in front and the warm air is aloft and the coldest air is behind.

More likely in summer

Question 13

Stationary front

Answer 13

~caused by isobars being parallel to the warm /cold air boundary

~the weather can persist for several days

Question 14

Passage warm front

Passage cold front

Answer 14

Warm front»
~warm front approches: pressure reduces from high (because replacing cold air with warm air),lowering clopud,
-RA
~at warm front:RA/DZ,pressure minimum,wind veers,increase in temp
~after warm front:warm sector conditions ,pressure slight increase
~warm sector:low cloud,intermittent drizzle,poor visibility,temp mild

COLD FRONT»
~cold front approaches slight pressure reduction
~+RA with CB,pressure minimum,wind vees,decrease in temp
~pressure increase ,good visibility but TCU/CU