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MET > AE - Clouds and fog > Flashcards

AE - Clouds and fog Flashcards

1
Q

Í hvaða skýji verður til freezing rain?

A

Nimbostratus

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2
Q

Hvaða ský? “Sometimes appears in the form of ragged patches.”

A

Stratus

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3
Q

Hvenær dags myndast orographic fog?

A

Hvenær sem er

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4
Q

Hvernig myndast advection fog?

A

Warm moist air flows over colder surface. Loftið snöggkólnar og nær daggarmörkum.

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5
Q

Hvaða ský hefur þessa lýsingu? “Fibrous (hair-like) appearance, or a silky sheen, or both.”

A

Cirrus

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6
Q

Í hvaða hæð eru low level clouds?

A

GND - 6500ft

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7
Q

Í hvaða hæð er Altocumulus?

A

6500ft - 23000ft

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8
Q

Stratocumulus, hvar gæti base verið?

A

1500 - 7000 ft.

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9
Q

Hvað er frontal fog?

A

þegar heitt regn frá heita loftinu sem er að leggjast yfir það kalda (warm front), fellur niður í kaldara loft þar sem það þéttist og myndar frontal fog.

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10
Q

Which type of fog can not be formed over water?

a) radiation fog
b) frontal fog
c) advection fog
d) arctic smoke

A

a) radiation fog.

Radiation fog gerist þegar landið snögg kælist og loftið fyrir ofan er heitara (og þéttis og myndar þoku). Sjórinn getur ekki snögg kælst.

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11
Q

Hver eru vertical mörk medium- og high level clouds?

A

Medium 6500 - 23000ft og high level clouds eru talin byrja 16500 ft.

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12
Q

Hvaða fog er í raun öfugt advection fog?

A

steam fog (arctic smoke)

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13
Q

Hvernig virkar steam fog (arctic smoke)?

A

Cold air moving over warmer water.

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14
Q

Af “cumulu” skýjunum, hvað er mest stable af þeim?

A

Altocumulus lenticularis

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15
Q

Main components of the altostratus is (two things)

A

ice crystals and water droplets

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16
Q

Hvaða ský hefur þessa lýsingu “it’s upper part resembles a cauliflower” ?

A

Towering cumulus.

Getur munað: cauliFLOWER TOWER

17
Q

Hvað getur radiation fog náð langt upp?

A

500ft

18
Q

Hvaða ský hefur þessa lýsingu? “Low, ragged clouds frequently occur below the layer, with which they may or may not merge.”

A

Nimbostratus.

19
Q

Cumulus clouds are an indication for __ and __ draughts.

A

up and down draughts.

20
Q

Hversu hátt getur CB náð?

A

20 km

21
Q

Til hvers bendir fair weather cumulus?

A

Turbulence

22
Q

Hvað er í freezing fog?

a) supercooled water droplets
b) ice crystals
c) frozen water droplets

A

a) supercooled water droplets

23
Q

Hvað er gott til að orographic fog myndist?

a) High relative humidity
b) absolutely unstable air

A

a) High relative humidity

24
Q

Radiation fog occurs most frequently in high/low pressure systems over land/sea

A

High pressure over land.
Ímyndaðu þér bara radiation fog yfir Lúxemborg yfir sumarið þegar þessi huge High pressure svæði liggja yfir. High = Clear sky, calm winds = No mixing = kjöraðstæður fyrir radiation fog.

25
Q

Can fog be supercooled and contain ice crystals?

A

Yes

26
Q

Rétt eða rangt? Mist and haze consist of water droplets.

A

Rangt, mist contains water droplets but haze contains small solids particles such as smoke, dust, sand.

27
Q

A layer of stratus is most likely to be dispersed by insolation resulting in the lifting of the ____ level.

A

condensation

28
Q

Which favours the development of orographic fog?

a) Absolutely unstable air
b) high relative humdity

A

b) high relative humdity

29
Q

Hvaða þoka finnst í coastal region of Newfoundland in spring time?

A

Advection fog.

30
Q

What will clear orographic fog?

a) A change of the air flow
b) Katabatic wind

A

a) A change of the air flow

31
Q

In mid-latitudes, the tops of cumulus are often limited by:

a) the tropopause
b) a temperature inversion

A

b) a temperature inversion

32
Q

A cumulonimbus cloud at mid-latitudes in summer contains

a) ice crystals
b) water droplets
c) supercooled water droplets

A

everything

33
Q

Which of the following statements is true concerning advection fog?

a) it forms when unstable air is adiabatically cooled.
b) it can appear suddenly by day or by night.

A

b) it can appear suddenly by day or by night.

34
Q

Í hvaða skýji gerist “halo” effect?

a) altostratus
b) cirrostratus

A

b) cirrostratus

35
Q

The presence of Altocumulus Castellanus indicates instability in the ___ troposphere.

A

middle.

36
Q

Hverju cancellar þú þegar aðstæðurnar hafa breyst?

a) aerodrome warning
b) TAF
c) Trend forecast

A

a) aerodrome warning

37
Q

A layer of stratus is most likely to be dispersed by ___ resulting in the lifting of the condensation level.

A

insolation.

38
Q

As a result of diurnal variation, radiation fog is lifted and a cloud cover is formed. Low stratus will develop caused by increasing ___ ___.

A

wind speed.

MET (11 decks)

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