Question 173-1 : Which one of the following statements is correct concerning the movement of the itcz intertropical convergence zone in the region of west africa ? [ Practice protocol ]

Question 173-2 : What is the name of the wind or air mass which gives to the main part of india its greatest proportion of precipitation ?

South west monsoon.

Humid monsoon begins in june in southern india to reach pakistan in julythe areas of the northern and central indian subcontinent heats up considerably during the hot summers which causes a low pressure area over the northern and central indian subcontinent to fill this void the moisture laden winds the se trade winds from the indian ocean rush in to the subcontinent the wind veers it will be the south west monsoon 592thunderstorms and showers of heavy rain can be expected

Question 173-3 : What is the type intensity and seasonal variation of precipitation in the equatorial region ?

Rainshowers hail showers and thunderstorms occur the whole year but frequency is highest during two periods april may and october november.

Question 173-4 : Assuming a generalised zonal system of world wind circulation the se trade winds are applicable to zone 318 ?

W.

584

Question 173-5 : Assuming a generalised zonal system of world climatic and wind circulation zone 't' is an area of 318 ?

Subtropical high pressure systems.

584

Question 173-6 : Considering melbourne c in july the weather is predominantly influenced by the zone of 2538 ?

Subtropical high pressure with the occasional passage of fronts originating in the adjacent zone of westerly waves.

July is the southern hemisphere winter 2537 584the itcz is well north the southern hemisphere sub tropical high pressure is over the centre of australia and the polar front is just south of melbourne 596westerlies average latitude are 50°n and 50°s

Question 173-7 : Assuming a generalised zonal system of world climatic and wind circulation zone 'y' is an area of 318 ?

Travelling low pressure systems.

584travelling low pressure systems = travelling depressions

Question 173-8 : Assuming a generalised zonal system of world wind circulation the ne trade winds are applicable to zone 318 ?

U.

584

Question 173-9 : Assuming a generalised zonal system of world climatic and wind circulation zone 'u' is in area of 318 ?

Ne trade winds.

584

Question 173-10 : The dotted line labelled y represents the 322 ?

Mean position of the intertropical convergence zone itcz during january.

2537

Question 173-11 : What weather conditions are most likely to affect an approach to dakar during july 323 ?

Wet and thundery due to the proximity of the intertropical convergence zone itcz.

2537in july the itcz is in the vicinity of dakar frequent and widespread thunderstorms are to be expected within the area of the itcz

Question 173-12 : Weather conditions at bombay during early july are mainly influenced by the 324 ?

Sw monsoon.

Se trade winds and ne trade winds converge on the itcz in july the itcz will be to the north of bombay 2537indian ocean will be affected by se trade windsthe areas of the northern and central indian subcontinent heats up considerably during the hot summers which causes a low pressure area over the northern and central indian subcontinent to fill this void the moisture laden winds the se trade winds from the indian ocean rush in to the subcontinent the wind veers it will be the sw monsoon 592

Question 173-13 : Weather conditions at bombay during january are mainly influenced by the 325 ?

Ne monsoon.

Se trade winds and ne trade winds converge on the itcz in january the itcz will be to the south of bombay 593bombay will be affected by ne trade winds it will be the ne monsoon

Question 173-14 : Which one of the following local winds is a foehn wind ?

Chinook.

A foehn wind is a warm dry wind on the lee side of a mountain range when the humid air goes over a mountain it loses its moisture and cools down a bit but when it descends down the slope the temperature rises because of the compression result is a strong warm and dry wind it develops all over the world such as the chinook rocky mountains over southern alberta in canada the bora comes from the yugoslavian mountains to the adriatic sea it is a katabatic wind meaning 'going downhill' which means that it is cold dry and often strongthe air from the bora wind comes from the top of the mountains and it is set in motion because of the warmth below because the wind moves down the mountain it strengthensthe bora develops during the winter the word 'bora' means wind from the mountain in greek greece lies just below yugoslavia the scirocco blows from southerly directions and can carry dust and sand which may reach europe it is a hot and subsequently humid southeast to southwest winds originating as hot dry desert air over northern africa flowing northward into the southern mediterranean basinthe harmattan is a dry and dusty west african trade wind it blows south from the sahara into the gulf of guinea between the end of november and the middle of march winter it is a cold wind

Question 173-15 : During the approach to mumbai 19°n 73°e on the west coast of india you are listening to the atis on 15 july at 0700 ltwhich of the following reports is most likely ?

25014kt 4500 shra sct015 bkn025cb 2524 q1006 nosig=.

Over west india mumbai is located over west coast of india tropical revolving storms cylcones occur from may to november 602you can expect rain showers shra cb and reduced visibility due to precipitation

Question 173-16 : On the west coast of india it can be said in general that the wind blows ?

For six month from the north east and for six month from the south west.

Question 173-17 : What name is given to the low level wind system between the subtropical high pressure belt and the equatorial trough of low pressure itcz ?

Trade winds.

596the subtropical high pressure belt is located at 30°nsitcz moves along the year around the equatorne and se trade winds are the low level wind systems located between the subtropical high pressure belt and the itcz

Question 173-18 : What is a favourable synoptic situation for the development of a scirocco ?

Low pressure area in the western part of the mediterranean sea.

Sirocco is a mediterranean wind that comes from the sahara and reaches hurricane speeds in north africa and southern europeit arises from a warm dry tropical airmass that is pulled northward by low pressure cells moving eastward across the mediterranean sea with the wind originating in the arabian or sahara deserts the hotter drier continental air mixes with the cooler wetter air of the maritime cyclone and the counter clockwise circulation of the low propels the mixed air across the southern coasts of europethe sirocco causes dusty dry conditions along the northern coast of africa storms in the mediterranean sea and cold wet weather in europe the sirocco's duration may be as short as half a day or may last several days many people attribute health problems to the sirocco either because of the heat and dust along the african coastal regions or because of the cool dampness in europe the dust within the sirocco winds can cause abrasion in mechanical devices and penetrate buildingssirocco winds reach a peak in march and in november when it is very hot with a maximum speed of about 55 kt 612low pressure area in the western part of the mediterranean is a favourable synoptic situation for the development of a sirocco

Question 173-19 : What weather conditions are indications of the summer monsoon in india ?

Thunderstorms showers of heavy rain.

Question 173-20 : Where do the trade winds blow ?

Between the horse latitudes and the doldrums.

The doldrums is a colloquial expression derived from historical maritime usage for the area affected by the intertropical convergence zone 609the trade winds blow between the horse latitudes and the itcz

Question 173-21 : Where are easterly waves found ?

Between subtropical high pressure cells and itcz.

Easterly waves are long waves that occur within the trade wind belt start over north western africa and propagate toward the west in the lower tropospheric tradewind flow across the atlantic oceanapproximate location amplitude and wavelength of easterly waves 495at first an easterly wave has a small amplitude and produces mild rain showers powerful thunderstorms and the force of high altitude winds amplify the wave when atmospheric conditions are favourable several severe thunderstorms begin to form and eventually a tropical storm may develop 638thunderstorms are most likely to develop on the east side of the wave

Question 173-22 : Which statement concerning the scirocco is correct ?

It blows from southerly directions and can carry dust and sand which may reach europe.

Sirocco is a mediterranean wind that comes from the sahara and reaches hurricane speeds in north africa and southern europeit arises from a warm dry tropical airmass that is pulled northward by low pressure cells moving eastward across the mediterranean sea with the wind originating in the arabian or sahara deserts the hotter drier continental air mixes with the cooler wetter air of the maritime cyclone and the counter clockwise circulation of the low propels the mixed air across the southern coasts of europethe sirocco causes dusty dry conditions along the northern coast of africa storms in the mediterranean sea and cold wet weather in europe the sirocco's duration may be as short as half a day or may last several days many people attribute health problems to the sirocco either because of the heat and dust along the african coastal regions or because of the cool dampness in europe the dust within the sirocco winds can cause abrasion in mechanical devices and penetrate buildingssirocco winds reach a peak in march and in november when it is very hot with a maximum speed of about 55 kt 612low pressure area in the western part of the mediterranean is a favourable synoptic situation for the development of a sirocco

Question 173-23 : What winds and air mass characteristics are mainly associated with the winter monsoon in the monsoon regions of the indian sub continent ?

North easterly winds bringing dry and hazy air.

Se trade winds and ne trade winds converge on the itcz and in january the itcz will be to the south of india this is the winter monsoon 620north easterly winds will bring dry and hazy air from the northern and central indian subcontinent

Question 173-24 : The dotted line designated z represents the 330 ?

Mean position of the intertropical convergence zone itcz during july.

2537

Question 173-25 : Which is true of nairobi kenya 331 ?

There are two wet seasons.

Question 173-26 : The typical weather conditions affecting the darwin area during july are 349 ?

Dry season mainly se winds visibility reduced by dust and haze.

The itcz reaches its most northerly position in july 618red lines show the maximum extreme positions 596winds affecting darwin in july are the se trade winds se trade winds and ne trade winds converge at the itcz this is the dry season and dust and haze coming from the inland desert blown by the se trade winds will affect visibility

Question 173-27 : The sw monsoon starts in the month of ?

June in southern india to reach pakistan in july.

Se trade winds and ne trade winds converge on the itcz 2537in july the itcz will be to the north of india this is the summer monsoon sw monsoon in january the itcz will be to the south of india this is the winter monsoon ne monsoon 620

Question 173-28 : In the trade wind belt between the surface and the 500 hpa level which of the following is true ?

The air is relatively moist in the lower part and dry in the upper part.

500 hpa = fl 180se trade winds and ne trade winds converge at the itcz intertropical convergence zone they occur only in the lower part of the troposphere and are more pronounced over the oceans in the trade winds there is a maximum of humidity as a result of the trade winds long sea passagein the upper part the air originates from the sub tropical high pressure belt is sinking warming adiabatically if temperature increases relative humidity will decrease the upper part is relatively dry

Question 173-29 : Which climatic type is to be expected between 10°n and 10°s ?

Tropical rain climate.

Cqb15 july 2011

Question 173-30 : The position of the intertropical convergence zone ?

Shows more variation over the continents than over the oceans.

593the intertropical convergence zone shows more variation in position over the continents than over the oceans

Question 173-31 : Which of the following statements is correct concerning the mediterranean climate ?

The annual rainfall is significantly below 700 mm.

Question 173-32 : In which areas are easterly waves most likely to form ?

In the trade wind zone.

Cqb15 august 2011similar to q855 answer between subtropical high pressure cells and itcz

Question 173-33 : Concerning the following statements 1 south india summer monsoon is a ne monsoon2 the dominant climate of australia is a dry climatefor those statements ?

1 is wrong 2 is right.

Question 173-34 : Which of the following statements concerning a cold air pool is correct ?

Direction and speed of movements of cold air pools are difficult to forecast.

Question 173-35 : Which of the following is typical for the snow tundra climate ?

High pressure weather dominates in winter with the sub soil being frozen.

Question 173-36 : The weather activity within a cold air pool is usually greatest ?

In the afternoon.

Question 173-37 : On which side of an easterly wave are thunderstorms most likely to develop ?

On the east side of the wave.

Easterly waves are 'long waves' that occur within the trade wind belt start over north western africa and propagate toward the west in the lower tropospheric tradewind flow across the atlantic oceanapproximate location amplitude and wavelength of easterly waves 495at first an easterly wave has a small amplitude and produces mild rain showers powerful thunderstorms and the force of high altitude winds amplify the wave when atmospheric conditions are favourable several severe thunderstorms begin to form and eventually a tropical storm may develop 638thunderstorms are most likely to develop on the east side of the wave

Question 173-38 : In january an extended high pressure area is normally observed over ?

Siberia.

Question 173-39 : How is the mediterranean climate best described ?

Anticyclonic and hot in summer frontal depressions in winter.

Question 173-40 : Which of the following statements is correct concerning the savannah climate ?