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Question 159-1 : Where during a flight from marseille to dakar in july may the itcz be encountered ? [ MCQ aircraft ]

In the vicinity of dakar

. 593.in july when arriving from europe the itcz is most likely to be encountered in the vicinity of dakar exemple 259 In the vicinity of dakar.

Question 159-2 : Which wind systems converge on the itcz when it lies at the equator ?

Se trade winds and ne trade winds

. 596 exemple 263 Se trade winds and ne trade winds

Question 159-3 : From which direction do the trade winds blow in the southern hemisphere ?

Se

Admin . 596 exemple 267 Se

Question 159-4 : Considering the route indicates from lisbon to freetown the harmattan is a . 290 ?

Ne wind affecting north west africa during november to april reducing visibility in rising dust

Admin .way to remember .harmattan an backwards stands for november april and north africa exemple 271 Ne wind affecting north-west africa during november to april reducing visibility in rising dust.

Question 159-5 : In which month does the humid monsoon in india start ?

In june

Admin .humid monsoon begins in june in southern india to reach pakistan in july .the 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 . 592.thunderstorms and showers of heavy rain can be expected exemple 275 In june.

Question 159-6 : The intertropical convergence zone itcz particularly affects ?

Western africa between 10°n and 20°n and the northern coasts of the arabian sea in july

. 557 exemple 279 Western africa between 10°n and 20°n and the northern coasts of the arabian sea in july.

Question 159-7 : The chinook is a ?

Warm and dry wind that forms as air descends on the leeward side of the rocky mountains

Admin . 596a 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 exemple 283 Warm and dry wind that forms as air descends on the leeward side of the rocky mountains.

Question 159-8 : A dry sand and dust laden north easterly wind that blows in winter over large parts of north west africa is known as a ?

Harmattan

exemple 287 Harmattan

Question 159-9 : The transition from sw to ne monsoon in india occurs in ?

September october november

.transition occurs when the itcz intertropical convergence zone goes down to the southern hemisphere .the itcz will reach its southernmost position in january at 10°s of latitude close to bombay . 2537 exemple 291 September, october, november.

Question 159-10 : Which of the following statements concerning the intertropical convergence zone is true ?

There are frequent occurrences of cb

exemple 295 There are frequent occurrences of cb.

Question 159-11 : An easterly wave is a ?

Wave in a trade wind belt moving from east to west with severe convective activity in rear of its trough

Admin .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 ocean .approximate location amplitude and wavelength of easterly waves . 495.at 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 . 638.thunderstorms are most likely to develop on the east side of the wave exemple 299 Wave in a trade wind belt, moving from east to west, with severe convective activity in rear of its trough.

Question 159-12 : The prevailing surface wind in the area of the west coast of africa north of the equator gulf of guinea is a ?

Sw monsoon in summer and ne tradewind in winter

.se trade winds and ne trade winds converge on the itcz . 2537.in july the itcz will be to the north of ethiopia the gulf of guinea will be under the influence the summer monsoon . 592.in january the itcz will be far south of the equator near the south of tanzania the gulf of guinea will be under the influence of the ne tradewind exemple 303 Sw monsoon in summer and ne tradewind in winter.

Question 159-13 : Which of the following statements concerning trade winds is correct ?

They occur only in the lower part of the troposphere and more pronounced over the oceans

Admin .the trade winds are surface winds and are stronger over the oceans because there is less surface friction than over land above the surface friction layer the wind up to the tropopause will vary depending on the exact location and time of year as indicated on the upper wind charts exemple 307 They occur only in the lower part of the troposphere and more pronounced over the oceans.

Question 159-14 : In the central part of the atlantic ocean between 10°n and 20°n the prevailing winds are ?

Ne trade winds

Admin .take care this question exists with 10°s and 20°s answer is 'se trade winds' . 584.the question asks for the prevailing winds only between 10°n and 20°n above the atlantic ocean . 2537.se trade winds may reach 5°n above the atlantic ocean this is the reason why they ask only between 10°n and 20°n exemple 311 Ne trade winds.

Question 159-15 : Along the west coast of india the prevailing winds are the ?

Sw monsoon in july and a ne monsoon in january

.se trade winds and ne trade winds converge on the itcz . 2537.in july the itcz will be to the north of india this is the summer monsoon .in january the itcz will be to the south of india this is the winter monsoon . 576 exemple 315 Sw monsoon in july and a ne monsoon in january.

Question 159-16 : The bora is a ?

Cold catabatic wind with the possibility of violent gusts

Admin .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 strong .the 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 strengthens exemple 319 Cold catabatic wind with the possibility of violent gusts.

Question 159-17 : What is the name of the northerly cold and strong wind that sometimes blows over a certain part of europe ?

Mistral

Admin .mistral .strong cold dry and squally northerly wind that blows offshore with great frequency along the mediterranean coast from northern spain to northern italy and that is particularly frequent in the lower rhone valley in south eastern france blowing way out into the golfe du lion the wind may persist for several days and is best developed when a depression is forming in the gulf of genoa to the east of a ridge of high pressure it might also be a purely katabatic wind the airstream that feeds the mistral is commonly derived from polar air of maritime origin it is most violent in winter and spring and its strenght is increased by the funneling effect of the rhone valley . 579.the mistral might easily reach a speed of 75 kt over the rhone delta compared with the typical 40 kt experienced along the coast exemple 323 Mistral.

Question 159-18 : What are the characteristics of the bora ?

It is a cold and very strong wind that blows mainly in winter from a tableland downwards to the adriatic

Admin .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 strong .the 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 strengthens exemple 327 It is a cold and very strong wind that blows mainly in winter from a tableland downwards to the adriatic

Question 159-19 : Which one of the following statements is correct concerning the movement of the itcz intertropical convergence zone in the region of west africa ?

It reaches its maximum northerly position of 15° 20°n in july

. 580. 2537.in the region of west africa dakar the itcz reaches its maximum northerly position of 15° 20° n in july exemple 331 It reaches its maximum northerly position of 15° - 20°n in july.

Question 159-20 : 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

Admin .humid monsoon begins in june in southern india to reach pakistan in july .the 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 . 592.thunderstorms and showers of heavy rain can be expected exemple 335 South-west monsoon.

Question 159-21 : 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

exemple 339 Rainshowers, hail showers and thunderstorms occur the whole year, but frequency is highest during two periods: april-may and october-november.

Question 159-22 : Assuming a generalised zonal system of world wind circulation the se trade winds are applicable to zone . 318 ?

W

Admin . 584 exemple 343 W

Question 159-23 : Assuming a generalised zonal system of world climatic and wind circulation zone 't' is an area of . 318 ?

Subtropical high pressure systems

Admin . 584 exemple 347 Subtropical high pressure systems.

Question 159-24 : 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. 584.the 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 . 596.westerlies average latitude are 50°n and 50°s exemple 351 Subtropical high pressure, with the occasional passage of fronts originating in the adjacent zone of westerly waves.

Question 159-25 : Assuming a generalised zonal system of world climatic and wind circulation zone 'y' is an area of . 318 ?

Travelling low pressure systems

Admin . 584.travelling low pressure systems = travelling depressions exemple 355 Travelling low pressure systems.

Question 159-26 : Assuming a generalised zonal system of world wind circulation the ne trade winds are applicable to zone . 318 ?

U

Admin . 584 exemple 359 U.

Question 159-27 : Assuming a generalised zonal system of world climatic and wind circulation zone 'u' is in area of . 318 ?

Ne trade winds

Admin . 584 exemple 363 Ne trade winds.

Question 159-28 : The dotted line labelled y represents the . 322 ?

Mean position of the intertropical convergence zone itcz during january

. 2537 exemple 367 Mean position of the intertropical convergence zone (itcz) during january.

Question 159-29 : 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

. 2537.in july the itcz is in the vicinity of dakar frequent and widespread thunderstorms are to be expected within the area of the itcz exemple 371 Wet and thundery due to the proximity of the intertropical convergence zone (itcz)

Question 159-30 : 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 . 2537.indian ocean will be affected by se trade winds .the 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 exemple 375 Sw monsoon.

Question 159-31 : 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 . 593.bombay will be affected by ne trade winds it will be the ne monsoon exemple 379 Ne monsoon

Question 159-32 : Which one of the following local winds is a foehn wind ?

Chinook

Admin .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 strong .the 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 strengthens .the 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 basin .the 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 exemple 383 Chinook.

Question 159-33 : 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 lt .which of the following reports is most likely ?

25014kt 4500 shra sct015 bkn025cb 25/24 q1006 nosig=

Admin .over west india mumbai is located over west coast of india tropical revolving storms cylcones occur from may to november . 602.you can expect rain showers shra cb and reduced visibility due to precipitation exemple 387 25014kt 4500 shra sct015 bkn025cb 25/24 q1006 nosig=

Question 159-34 : 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

exemple 391 For six month from the north east and for six month from the south west

Question 159-35 : 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

. 596.the subtropical high pressure belt is located at 30°n/s .itcz moves along the year around the equator .ne and se trade winds are the low level wind systems located between the subtropical high pressure belt and the itcz exemple 395 Trade winds.

Question 159-36 : What is a favourable synoptic situation for the development of a scirocco ?

Low pressure area in the western part of the mediterranean sea

Admin .sirocco is a mediterranean wind that comes from the sahara and reaches hurricane speeds in north africa and southern europe .it 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 europe .the 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 buildings sirocco winds reach a peak in march and in november when it is very hot with a maximum speed of about 55 kt . 612.low pressure area in the western part of the mediterranean is a favourable synoptic situation for the development of a sirocco exemple 399 Low pressure area in the western part of the mediterranean sea.

Question 159-37 : What weather conditions are indications of the summer monsoon in india ?

Thunderstorms showers of heavy rain

exemple 403 Thunderstorms, showers of heavy rain.

Question 159-38 : 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 . 609.the trade winds blow between the horse latitudes and the itcz exemple 407 Between the “horse latitudes” and the doldrums.

Question 159-39 : 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 ocean .approximate location amplitude and wavelength of easterly waves . 495.at 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 . 638.thunderstorms are most likely to develop on the east side of the wave exemple 411 Between subtropical high pressure cells and itcz.

Question 159-40 : Which statement concerning the scirocco is correct ?

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

Admin .sirocco is a mediterranean wind that comes from the sahara and reaches hurricane speeds in north africa and southern europe .it 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 europe .the 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 buildings sirocco winds reach a peak in march and in november when it is very hot with a maximum speed of about 55 kt . 612.low pressure area in the western part of the mediterranean is a favourable synoptic situation for the development of a sirocco exemple 415 It blows from southerly directions and can carry dust and sand which may reach europe.


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