AE - Clouds and fog

Question 1

Í hvaða skýji verður til freezing rain?

Answer 1

Nimbostratus

Question 2

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

Answer 2

Stratus

Question 3

Hvenær dags myndast orographic fog?

Answer 3

Hvenær sem er

Question 4

Hvernig myndast advection fog?

Answer 4

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

Question 5

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

Answer 5

Cirrus

Question 6

Í hvaða hæð eru low level clouds?

Answer 6

GND - 6500ft

Question 7

Í hvaða hæð er Altocumulus?

Answer 7

6500ft - 23000ft

Question 8

Stratocumulus, hvar gæti base verið?

Answer 8

1500 - 7000 ft.

Question 9

Hvað er frontal fog?

Answer 9

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.

Question 10

Which type of fog can not be formed over water?

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

Answer 10

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.

Question 11

Hver eru vertical mörk medium- og high level clouds?

Answer 11

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

Question 12

Hvaða fog er í raun öfugt advection fog?

Answer 12

steam fog (arctic smoke)

Question 13

Hvernig virkar steam fog (arctic smoke)?

Answer 13

Cold air moving over warmer water.

Question 14

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

Answer 14

Altocumulus lenticularis

Question 15

Main components of the altostratus is (two things)

Answer 15

ice crystals and water droplets

Question 16

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

Answer 16

Towering cumulus.

Getur munað: cauliFLOWER TOWER

Question 17

Hvað getur radiation fog náð langt upp?

Answer 17

500ft

Question 18

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

Answer 18

Nimbostratus.

Question 19

Cumulus clouds are an indication for __ and __ draughts.

Answer 19

up and down draughts.

Question 20

Hversu hátt getur CB náð?

Answer 20

20 km

Question 21

Til hvers bendir fair weather cumulus?

Answer 21

Turbulence

Question 22

Hvað er í freezing fog?

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

Answer 22

a) supercooled water droplets

Question 23

Hvað er gott til að orographic fog myndist?

a) High relative humidity
b) absolutely unstable air

Answer 23

a) High relative humidity

Question 24

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

Answer 24

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.

Question 25

Can fog be supercooled and contain ice crystals?

Answer 25

Yes

Question 26

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

Answer 26

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

Question 27

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

Answer 27

condensation

Question 28

Which favours the development of orographic fog? a) Absolutely unstable air b) high relative humdity

Answer 28

b) high relative humdity

Question 29

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

Answer 29

Advection fog.

Question 30

What will clear orographic fog? a) A change of the air flow b) Katabatic wind

Answer 30

a) A change of the air flow

Question 31

In mid-latitudes, the tops of cumulus are often limited by: a) the tropopause b) a temperature inversion

Answer 31

b) a temperature inversion

Question 32

A cumulonimbus cloud at mid-latitudes in summer contains a) ice crystals b) water droplets c) supercooled water droplets

Answer 32

everything

Question 33

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.

Answer 33

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

Question 34

Í hvaða skýji gerist "halo" effect? a) altostratus b) cirrostratus

Answer 34

b) cirrostratus

Question 35

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

Answer 35

middle.

Question 36

Hverju cancellar þú þegar aðstæðurnar hafa breyst? a) aerodrome warning b) TAF c) Trend forecast

Answer 36

a) aerodrome warning

Question 37

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

Answer 37

insolation.

Question 38

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

Answer 38

wind speed.