An air mass which originates over the North Atlantic between 50 and 70 degrees north and is moving in over Scandinavia is called ?
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Which of the following statements is correct concerning the typical weather in a warm sector in mid and high latitudes over continental areas during summer ?
The air mass affecting position 'S' is most likely to be 377 ?
In a westerly situation mean time interval between polar frontal waves in western europe Maritime tropical stable. . 
What change in temperature will occur at point a during next hour 380 A drop in temperature. a cold front passing over point a the air behind a cold front noticeably colder drier than air ahead of it. 
The air mass type advected from a direction indicated arrow number 6 designated 381 A drop in temperature. a cold front passing over point a the air behind a cold front noticeably colder drier than air ahead of it. 
What change in pressure will occur at point f during next hour 382 A drop in temperature. as warm front approaches pressure falls during passage of warm sector pressure steady after cold front has passed pressure will rise. Question 140-8
During winter air mass type advected from a direction indicated arrow number 1 designated 384 A drop in temperature. ecair16 what are difference(s) between 'maritime polar' 'maritime arctic'? polar air masses (maritime artic) air masses come from polar cap maritime polar air masses are those which begin their life over cold polar seas. Question 140-9
Which of following front types most known gusty winds A drop in temperature. ecair16 what are difference(s) between 'maritime polar' 'maritime arctic'? polar air masses (maritime artic) air masses come from polar cap maritime polar air masses are those which begin their life over cold polar seas. Question 140-10
What average geographical latitude assumed the zone of subtropical high A drop in temperature. ecair16 what are difference(s) between 'maritime polar' 'maritime arctic'? polar air masses (maritime artic) air masses come from polar cap maritime polar air masses are those which begin their life over cold polar seas. Question 140-11
Which of these statements about air masses are correct or incorrect 1 the polar ice caps are source regions of polar air 2 tropical air may have cold air mass properties A drop in temperature. ecair16 what are difference(s) between 'maritime polar' 'maritime arctic'? polar air masses (maritime artic) air masses come from polar cap maritime polar air masses are those which begin their life over cold polar seas. Question 140-12
Which of following correct regarding a cold high pressure area It will decrease in intensity with increasing altitude. Easa 2014 a cold high pressure area one in which temperatures on horizontal plane decrease toward center the pressure deceases rapidly with height. Question 140-13
What change in temperature will occur at point b during next hour 391 Approximately constant temperature. Easa 2014 without a scale we can't tell if cold front will pass through this position during next hour but question statement during next hour not 'in one hour' spacing of isobars at point b in front of cold front are same therefore temperature at point b should remain constant during next hour because pressure will not change in about one a half hours we can expect to see a drop in temperature when cold front will pass above point b. Question 140-14
What are typical weather conditions in a warm anticyclone over land Fine weather dominates in summer. during summer in centre of a warm anticyclone over land (stationary high pressure zone = flat pressure pattern) we have light or no wind weather fine but you can get thunderstorms in afternoon or evening due to convective activity (the land warms causing convective lifting = cb). Question 140-15
for this question use annex 050 061 the weather most likely to be experienced at position ' 394 Frequent heavy showers of rain or snow. during summer in centre of a warm anticyclone over land (stationary high pressure zone = flat pressure pattern) we have light or no wind weather fine but you can get thunderstorms in afternoon or evening due to convective activity (the land warms causing convective lifting = cb). Question 140-16
Regarding thermodynamic stability and ground visibility what are difference between a warm air mass and a cold air mass in central europe during summer The cold air mass unstable the visibility better in warm air mass. during summer in centre of a warm anticyclone over land (stationary high pressure zone = flat pressure pattern) we have light or no wind weather fine but you can get thunderstorms in afternoon or evening due to convective activity (the land warms causing convective lifting = cb). Question 140-17
What change in height of cloud base will be observed when flying in vmc from cold air side towards a warm front The cloud base descends gradually. during summer in centre of a warm anticyclone over land (stationary high pressure zone = flat pressure pattern) we have light or no wind weather fine but you can get thunderstorms in afternoon or evening due to convective activity (the land warms causing convective lifting = cb). Question 140-18
What the average width of precipitation zone of a cold front The cloud base descends gradually. during summer in centre of a warm anticyclone over land (stationary high pressure zone = flat pressure pattern) we have light or no wind weather fine but you can get thunderstorms in afternoon or evening due to convective activity (the land warms causing convective lifting = cb). Question 140-19
Which part of a frontal system corresponds to following description wind nw gustyclouds cumulus cumulonimbusprecipitation showers occasional thunderstormsvisibility very good apart from precipitation areas Weather behind cold front. during summer in centre of a warm anticyclone over land (stationary high pressure zone = flat pressure pattern) we have light or no wind weather fine but you can get thunderstorms in afternoon or evening due to convective activity (the land warms causing convective lifting = cb). Question 140-20
During summer in centre of a warm anticyclone over land what are cloudiness and visibility like The sky clear or with few clouds visibility moderate to poor. during summer in centre of a warm anticyclone over land (stationary high pressure zone = flat pressure pattern) we have light or no wind weather fine but you can get thunderstorms in afternoon or evening due to convective activity (the land warms causing convective lifting = cb). Question 140-21
The first clouds are thin wispy cirrus followed sheets of cirrus and cirrostratus and altostratus the s is obscured as altostratus thickens and rain begins to fall the cloud base lowering as nimbostratus arrives these phenomena describe approach of a The sky clear or with few clouds visibility moderate to poor. Revised ecqb03 july 2016. Question 140-22
What average geographical latitude assumed the zone of travelling frontal depressions The sky clear or with few clouds visibility moderate to poor. Ecqb03 august 2016 an area of low pressure found together with a surface front a 'frontal depression' frontal depressions are mid latitude weather systems formed due to differences in temperature pressure of adjacent or converging air masses those frontal depression born on front between polar temperate air masses create a warm front where warmer air rises over colder one then trail a cold front behind it. Question 140-23
Which meteorological system causes a general collapse of flight levels and makes dangerous overflight of mountains A cold air pool (cold low). Ecqb03 august 2016 an area of low pressure found together with a surface front a 'frontal depression' frontal depressions are mid latitude weather systems formed due to differences in temperature pressure of adjacent or converging air masses those frontal depression born on front between polar temperate air masses create a warm front where warmer air rises over colder one then trail a cold front behind it. Question 140-24
Which thunderstorms generally develop in afternoon in summer over land in moderate latitudes Airmass thunderstorms. Ecqb03 august 2016 an area of low pressure found together with a surface front a 'frontal depression' frontal depressions are mid latitude weather systems formed due to differences in temperature pressure of adjacent or converging air masses those frontal depression born on front between polar temperate air masses create a warm front where warmer air rises over colder one then trail a cold front behind it. Question 140-25
Strong airmass thunderstorms most often occur during summertime in central europe with arrival of Maritime tropical air. Ecqb03 august 2016 an area of low pressure found together with a surface front a 'frontal depression' frontal depressions are mid latitude weather systems formed due to differences in temperature pressure of adjacent or converging air masses those frontal depression born on front between polar temperate air masses create a warm front where warmer air rises over colder one then trail a cold front behind it. Question 140-26
Refer to chart correct statement 412 The front north of frankfurt moving north east at about 5 kt. Ecqb03 august 2016 an area of low pressure found together with a surface front a 'frontal depression' frontal depressions are mid latitude weather systems formed due to differences in temperature pressure of adjacent or converging air masses those frontal depression born on front between polar temperate air masses create a warm front where warmer air rises over colder one then trail a cold front behind it. Question 140-27
What are meteorological prerequisites at low level thunderstorms formed lifting processes over land High temperatures high humidity. Ecqb03 august 2016 an area of low pressure found together with a surface front a 'frontal depression' frontal depressions are mid latitude weather systems formed due to differences in temperature pressure of adjacent or converging air masses those frontal depression born on front between polar temperate air masses create a warm front where warmer air rises over colder one then trail a cold front behind it. Question 140-28
The air mass affecting position 'p' most likely to be 418 High temperatures high humidity. the wind (in northern hemisphere) leaves low pressures on its left from that we deduce a northeasterly wind hence a continental polar air mass. Question 140-29
Refer to annex 050 10872a by time front 'z' has passed point 'q' surface wind will have 421 High temperatures high humidity. the wind (in northern hemisphere) leaves low pressures on its left from that we deduce a northeasterly wind hence a continental polar air mass. Question 140-30
At what time of year are paths of north atlantic lows moving from west to east generally at their most southerly position High temperatures high humidity. in winter north atlantic lows moving from west to east are in their most southerly position having moved from florida to sw england. Question 140-31
An aircraft flying in southern hemisphere at low altitude less than 2000 feet and going directly away from a centre of low pressure what direction relative to aircraft does wind come from From left slightly on nose. the wind in southern hemisphere rotates clockwise around a low at 2000 ft surface friction will cause wind to veer blow across isobars if you go directly away from centre wind comes from left slightly on nose. Question 140-32
Which weather condition lowers true altitude as compared to pressure altitude to a position where flight over mountains could be dangerous From left slightly on nose. when qnh lower than 1013 25 hpa altitude lower than pressure altitude (based on 1013 25 hpa datum) when ambient temperature less than isa aircraft's true altitude lower than indicated altitude the aircraft could be dangerously lower than its pressure altitude (flight level) in a cold depression. Question 140-33
In southern hemisphere what wind effect would you expect when flying from a high pressure area towards a low pressure area at fl 100 From left slightly on nose. flying from a high pressure area towards a low pressure area at fl100 wind comes from right. Question 140-34
How do you recognize a cold air pool As a low pressure area aloft (e g on 5 hpa chart). a cold pool a meteorologic term a cold air block the cold air pool synoptic situation can be identified in synoptic charts because they show a low pressure area in 500 hpa chart which not obvious in surface chart indicating a concentration of cold air. Question 140-35
What type of air movement associated with centre line of a trough Convergence with lifting. a pressure system in which isobars around a low pressure become elongated such that pressure lower along axes of trough than on its two sides sometimes isobars at a trough have a pronounced v shape active weather fronts always lie in troughs but not all troughs are frontal the air in centre of a low pressure centre trough or heat trough lifted convergence widespread ascent as the air in intertropical convergence zone. Question 140-36
What the correct term the descending air flow in a large high pressure area Convergence with lifting. a pressure system in which isobars around a low pressure become elongated such that pressure lower along axes of trough than on its two sides sometimes isobars at a trough have a pronounced v shape active weather fronts always lie in troughs but not all troughs are frontal the air in centre of a low pressure centre trough or heat trough lifted convergence widespread ascent as the air in intertropical convergence zone. Question 140-37
What surface weather associated with a stationary high pressure region over land in winter A tendency fog low st. high pressure associated with stable sinking air without convective or frontal lifting there will be little or no cloud precipitation any cloud formation in winter will be stratus rather than cumulus the precipitation will be drizzle (or granular snow) rather than rain (or snow). Question 140-38
Where the most dangerous zone in a tropical revolving storm In wall of clouds around eye. high pressure associated with stable sinking air without convective or frontal lifting there will be little or no cloud precipitation any cloud formation in winter will be stratus rather than cumulus the precipitation will be drizzle (or granular snow) rather than rain (or snow). Question 140-39
In month of august you prepare a flight cruising level fl 370 from bombay 19°n 73°e to bangkok 13°n 100°e what wind conditions can you expect In wall of clouds around eye. you will face tropical easterly jet at fl370. Question 140-40
Tropical revolving storms do not occur in southeast pacific and south atlantic mainly because Of low water temperature. by elimination there no coriolis force at equator only the coriolis force varies with latitudes in southeast pacific wind comes from nw (the 'westerlie) se trade winds cross over into northern hemisphere only between dakar indian ocean (up to philippines) in end tropical revolving storms do not occur in southeast pacific the south atlantic mainly because of low water temperature.
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