atmospheric circulation and weather system clear ias

Frictional Force – It affects the speed of the wind. (iv) Which one of the following is the source region for the formation of air masses? The general circulation of the atmosphere also affects the oceans. The Pacific/North American Pattern, or PNA, describes the variation of atmospheric circulation patterns over the Pacific Ocean and North America. Due to gravity the air at the surface is denser and hence has higher pressure.Select the correct answer from the following codesa. The transfer of heat energy from lower latitudes to higher latitudes maintains the general circulation. The wind velocity in a tropical cyclone is much higher and it is more destructive. Only 1 and 2c. Winds always move from High Pressure to Low Pressure zone, that’s why pressure gradient force is from north to south. It is greatest at the surface and its influence generally extends up to an elevation of 1 – 3 km. Only 1b. This force is called the Coriolis force. Winds in the upper atmosphere i.e. And the north easterlies winds move towards south western region. Only 1b. A pilot enters the weather service office and wants to know what time of the day she can expect to encounter the least turbulent winds at 760 m above central Kansas. Atmosphere is the air surrounding the earth. It produced by differences in atmospheric pressure2. a) 1 only b) 2, 4 and 5 only c) 2 and 4 only d) 3 and 5 only Pattern of planetary winds depends on which of the following?1. Both 1 and 2d. Only 1b. Migration of pressure belts following apparent path of the sunSelect the correct answer from the following codesa. Neither 1 nor 2 Answer: aExplanation: The pattern of the movement of the planetary winds is called the general circulation of the atmosphere. Because of the warm temperature over the land, the air rises giving rise to a low pressure area. In the subtropical high-pressure belts near latitudes 30° N and 30° S (the horse latitudes), air descends … It is greatest at the surface and its influence generally extends up to an elevation of 1 - 3 km. (i) If the surface air pressure is 1,000 mb, the air pressure at 1 km above the surface will be: (a) 700 mb (b) 1,100 mb (c) 900 mb (d) 1,300 mb. In southern hemisphere it deflects the wind to the left.2. Equator is the region of high insulation it receives ample of sun rays all throughout the year. After completing the Atmospheric Circulation and Weather Systems it becomes important for students to evaluate themselves how much they have learned from the chapter. The smaller scale weather systems – mid-latitude depressions, or tropical convective cells … Only 2 and 3d. Another reason for sinking is the cooling of air when it reaches 30o N and S latitudes. The Earth is surrounded by a thin layer of air called the atmosphere. 1,2 and 3Answer: dExplanation: It deflects the wind to the right direction in the northern hemisphere and to the left in the southern hemisphere. The pressure gradient is strong where the isobars are close to each other and is weak where the isobars are apart.Q3. Only 1 and 2c. Wind in this region gets warm, and warm air rises. Thus, pressure gradient from sea to land is created and the wind blows from the sea to the land as sea breeze. The deflection is more when the wind velocity is high. The rotation of earth3. (iii) Why does tropical cyclone originate over the seas? Atmospheric pressure also determines when the air will rise or sink. Along 30° N and 30° S exists high-pressure areas known as the subtropical highs. Consider the following statements 1. The corresponding anomalous sinking branch lies over the eastern Amazon basin and western deep tropical Atlantic (i.e., 5°S–15°N, 35°–65°W). The process of formation of the fronts is known as frontogenesis. These winds which are  straight and parallel to the isobar are known as geostrophic wind. The air is a mixture of several gases and it encompasses the earth from all sides. Various studies (Jaagus, 2006; Hoy et al., 2013; Cahynová and Huth, 2016) suggest that the changes in air temperature over the last decades have been due to the changes in atmospheric circulation.From synoptic climatology’s point of view, air temperature rise may either be caused by increased frequency of particular “warm” circulation patterns or they started to bring warmer air masses. Only 1b. Like other atmospheric circulations, the PNA has the most impact on climate variables during the winter. Which of the following is/are true about thunder storms?1. The pressure gradient is strong where the isobars are close to each other and is weak where the isobars are apart. Coriolis force is directly proportional to the velocity of wind.3. The Earth's atmospheric circulation varies from year to year, but the large-scale structure of its circulation remains fairly constant. 2. Katabatic wind isa. Coriolis Force – The rotation of the earth in its axis affects the direction of the wind. The land loses heat faster and is cooler than the sea. Cool air in the windward side of slopeAnswer: aExplanation: During the night the slopes get cooled and the dense air descends into the valley as the mountain wind. Tropical cyclones typically form over large bodies of relatively warm water. The air is one among the necessary conditions for the existence of life on this planet. Which of the following is/are true about Extra tropical cyclones?1. 3. Only 1b. Atmospheric circulation, any atmospheric flow used to refer to the general circulation of the Earth and regional movements of air around areas of high and low pressure. latitudinal variation of atmospheric heating (from equator to poles), emergence of pressure belts (HP and LP system), the migration of belts following the path of the sun (warm temperature cause air to rise), the distribution of continents and oceans (land heats faster than water). The air surrounding the earth is called the atmosphere. 1,2 and 3Answer: cExplanation: Tropical cyclones originate and intensify over warm tropical oceans. Only 1 and 2c. In order to eliminate the effect of altitude while comparing different isobars, pressure measured at station level is reduced to sea level in preparation of weather maps. It is low pressure zone where winds from tropics converge.2. Subtropical High, Subpolar Low, Easterlies, Westerlies | Pressure Belts of World, Industrial Regions of North America – USA and Canada, Migration| Types, Causes & Consequences – Chapter 2 Class 12 NCERT Geography, Population | Distribution, Density, Growth & Composition – Chapter 1 Class 12 NCERT Geography, Everything on Ramsar Convention – Wetlands in India | UPSC, IAS, CDS, NDA, SSC CGL, Types of Forests in India – Evergreen, Deciduous, Thorny, Montane, Littoral Swamp | UPSC, IAS, CDS, NDA, Biodiversity and Conservation – Chapter 16 Class 11 Geography NCERT Solutions. Fronts occur at equatorial regions.2. Why is the pressure measured at station level reduced to the sea level in preparation of weather maps? Only 1b. The pressure decreases with height. Only 1b. Generally, over low pressure area the air will converge and rise. Over the sea surface the friction is minimal. Warm air rising creates areas of low pressure, particularly around the equator where we find the Doldrums. The tropical cyclonesoriginate only over the seas and on reaching the land they dissipate. Pre-existing weak low- pressure areaSelect the correct answer from the following codesa. The atmosphere is essential for the survival of plant and animal life. The easterlies from either side of the equator converge in the Inter Tropical Convergence Zone (ITCZ).Q9. Unlike areas of low pressure, the absence of clouds means that areas prone to high-pressure experience extremes in diurnal and seasonal temperatures since there are no clouds to block incoming solar radiation or trap outgoing longwave … These notes will also be useful for other competitive exams like banking PO, SSC, state civil services exams, and so on. These three cells set the pattern for the general circulation of the atmosphere. Only 1b. Neither 1 nor 2 Answer: bExplanation: When the cold air moves towards the warm air mass, its contact zone is called the cold front, whereas if the warm air mass moves towards the cold air mass, the contact zone is a warm front. It raises upto 14km in troposphere and reaches land surfaces near equator as Easterlies.3. If an air mass is fully lifted above the land surface, it is called the occluded front.Q11. Air in horizontal motion is wind. Only 1 and 2c. I m need other parts of this Chpt plz provide us link🙏🙏🙏, Your email address will not be published. Atmosphere MCQ is important for exams like IBPS, SCC, UPSC, NEET etc. latitudinal variation of atmospheric heating (from equator to poles) emergence of pressure belts (HP and LP system) the migration of belts following the path of the sun (warm temperature cause air to rise) the distribution of continents and oceans (land heats faster than water) the rotation of earth (Coriolis force) ATMOSPHERIC PRESSURE Do you realise that our body is subjected to a lot of air pressure. This causes accumulation of air at about 30o N and S. Part of the accumulated air sinks to the ground and forms a subtropical high. The differences in atmospheric pressure causes the movement of air from high pressure to low pressure, setting the air in motion. Neither 1 nor 2 Answer: bExplanation: Frictional force affects the speed of the wind. Pressure Gradient Force – The differences in atmospheric pressure produces a force. Only 2 and 3d. 8) You mentioned that you will have a separate video for that but I can’t find it. Powered by WordPress. The Coriolis force acts perpendicular to the pressure gradient forceSelect the correct answer from the following codesa. atmospheric circulation system so small that it may influence the weather in only a portion of a large city or county; dimensions range from 1 to 100 km and last from hours to a day or so; includes thunderstorms. Wind always moves from high pressure areas to low pressure areas.Q2. The higher the pressure gradient force, the more is the velocity of the wind and the larger is the deflection in the direction of wind.Q5. Both 1 and 2d. Torrential rains in high velocity winds are found in area around the eye of the cyclone. (i) What is the unit used in measuring pressure? Which of the following is/are favourable conditions for the formation of tropical cyclones?1. Cool air of high plateaus and ice fieldsb. This results in variations in the atmospheric pressure. MP Board Class 12 Physics Model Question Paper: Marking Scheme, Weightage and Blueprint, MP Board Class 12 Hindi Model Question Paper: Marking Scheme, Weightage and Blueprint, MP Board Class 12 Economics Model Question Paper: Marking Scheme, Weightage and Blueprint, MP Board Class 12 Biology Model Question Paper: Marking Scheme, Weightage and Blueprint, MP Board Class 12 Mathematics Model Question Paper: Marking Scheme, Weightage and Blueprint, MP Board Class 12 Chemistry Model Question Paper: Marking Scheme, Weightage and Blueprint. Only 1b. Only 1 and 2c. Consider the following statements 1. Only 2c. On the other hand, the sea is relatively cool and the pressure over sea is relatively high. Front. They are totally controlled by pressure gradient and Coriolis force. 4. (ii) While the pressure gradient force is from north to south, i.e. The geography is scientific in its orientation and hence the IAS Aspirants having Arts background find it very difficult to prepare the geography for the IAS Prelims Exam.Q1. (ii) The Inter Tropical Convergence Zone normally occurs: (a) near the Equator  (b) near the Tropic of Cancer (c) near the Tropic of Capricorn (d) near the Arctic Circle. The large-scale winds of the atmosphere initiate large and slow moving currents of the ocean. Possible reasons for the formation of subtropical high pressure are:-. As a result, equator is a low pressure zone. Pressure Systems Air expands when heated and gets compressed when cooled. (Remember that it just appears to deflect to the right because the ground beneath it moves.) Physical Geography is a very important component of Civil Service Exam Syllabus and it helps immensely in the IAS Prelims Exam as a whole. Only 2c. Pressure is expressed in units of millibar (mb) and Pascals. The conditions favourable for the formation and intensification f tropical storms are (i) Large sea surface with temperature higher than 27° C (ii) Presence of the Coriolis force (iii) Small variations in the vertical wind speed (iv) A pre-existing weak low- pressure area or low-level-cyclonic circulation (v) Upper divergence above the sea level system.Q15. Over high pressure area the air will subside from above and diverge at the surface.Select the correct answer from the following codesa. Which of the following is/are about “Fronts”?1. As one moves up the air gets varified and one feels breathless. 1,2 and 3Answer: dExplanation: Other severe local storms are thunderstorms and tornadoes. They are characterised by steep gradient in temperature and pressure.3. The pressure gradient at nigh is from the land to the sea and the wind blows from the land to the sea as land breeze. Ans. By continuing to use our website, you agree to our, IAS Prelims Exam GS Practice Papers and ebooks. Thermohaline circulation (THC) is a part of the large-scale ocean circulation that is driven by global density gradients created by surface heat and freshwater fluxes. Only 2c. Neither 1 nor 2 Answer: Explanation: The wind circulation around a low is called cyclonic circulation. Geography section provides you all type of mcq questions on Atmosphere with explanations. Primary circulation includes the planetary wind system which are related to the general arrangement of the pressure belts on the earth surface. Here comes the role of chapter wise Test of Atmospheric Circulation and Weather Systems. Here are the NCERT Based Geography Questions for IAS Exam Preparation ... ATMOSPHERIC CIRCULATION AND WEATHER SYSTEMS. Ans. (iii) The direction of wind around a low pressure in northern hemisphere is: (a) clockwise (b) perpendicular to isobars (c) anti-clock wise (d) parallel to isobars. The student knows that Earth's global ocean, powered by the Sun, is a major driving force for weather and climate through complex atmospheric interactions. Oceanic water circulation is set in motion by general circulation of atmosphere.2. They bring abrupt changes in temperature.Select the correct answer from the following codesa. Only 1b. Extra tropical cyclones affect large area compared to tropical cyclones.3. Pattern of movement of planetary winds and local winds is called general circulation of atmosphere.Select the correct answer from the following codesa. Atmospheric Pressure is expressed in the units of Millibars and Pascal. It envelops the e… Atmospheric Pressure is measured by an instrument called ‘barometer’. The diameter of the storm over the Bay of Bengal, Arabian sea and Indian ocean is between 600 – 1200 km. Ans. With reference to Inter Tropical Convergence Zone (ITCZ), which of the following is/are true?1. sea breezes, and land breezes Wind velocity often reaches 250 km per hour. atmospheric circulation, the turbulent pattern of wind, the formation of air masses, the disturbed weather when air masses interact with each other and the phenomenon of violent tropical storms. Both 1 and 2d. Only 2c. Tropical cyclones forming between 5 and 30 degrees North latitude typically move toward the west. Thunderstorms are caused by intense convection on moist hot days. In which part of the tropical cyclone do torrential rains and high velocity winds blow and why? Only 2 and 3d. Only 2 and 3d. They occur over most of Earth’s surface in a variety of sizes ranging from the very large semipermanent examples described above to smaller, highly mobile systems. The cyclones, which cross 20 degrees North latitude generally are more destructive. They cover a larger area and can originate over the land and sea. and moves towards the poles. from the subtropical high pressure to the equator in the northern hemisphere, why are the winds north easterlies in the tropics. Dry air on the leeward side of sloped. Only 1 and 2c. The winds from the tropics converge at this low pressure zone. Sometimes the winds in the middle and upper levels of the atmosphere change and steer the cyclone toward the north and northwest. Atmospheric circulation is the large-scale movement of air and together with ocean circulation is the means by which thermal energy is redistributed on the surface of the Earth. Only 2 and 3d. Ans. What are the possible reasons for the formation of subtropical high pressure over 30o N and S latitudes? In contrast to the Hadley, Ferrel and polar circulations that run along north-south lines, the Walker circulation is an east-west circulation. Only 1b. Tropical cyclones, move from east to west.Q13. The cyclone creates storm surges and they inundate the coastal lowlands. As shown on the atmospheric circulation map (left), sunlight drives latitudinal banding of the atmosphere, which impacts the Coriolis Effect and prevailing winds. Wind moves from low pressure areas to high pressure areas.2. Over high pressure area the air will subside from above and diverge at the surface.Q6. They derive their energy through the evaporation of water from the ocean surface, which ultimately re-condenses into clouds and rain when moist air rises and cools to saturation. Environ. General Circulation of the atmosphere is one of many concepts for UPSC Geography that candidates must familiarize themselves with. Warm air of tropical desertc. Factors affecting the speed and direction of wind are:-. 7, top). The adjective thermohaline derives from thermo-referring to temperature and -haline referring to salt content, factors which together determine the density of sea water. If the warm air mass moves towards the cold air mass, the contact zone is a cold front.2. The atmosphere is a mixture of different gases. 1,2 and 3Answer: aExplanation: The tropical cyclones do not have a clear frontal system. Ans. Tropical cyclones originate over land and sea.3. Only 2c. This Pattern of movement of planetary winds is called General circulation of atmosphere. It is zone of convergence of easterlies from either side of the equator.Select the correct answer from the following codesa. Atmospheric Science, a section of the journal Frontiers in Environmental Science Received:07 May 2015 Accepted:02 June 2015 Published:19 June 2015 Citation: Ramos AM, Barriopedro D and Dutra E (2015) Circulation weather types as a tool in atmospheric, climate, and environmental research. Neither 1 nor 2 Answer: bExplanation: Due to gravity the air at the surface is denser and hence has higher pressure. Air rises at the equator, but as it moves toward the pole at the top of the troposphere, it deflects to the right. The wind circulation around a high is called cyclonic circulation.2. Your email address will not be published. Print The General Circulation of the Atmosphere Worksheet 1. It reaches the top of the troposphere up to an altitude of 14 km. Around a high it is called anti cyclonic circulation. 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High it is low pressure zone, that ’ s why pressure.... Provide us link🙏🙏🙏, Your email address will not be published, MAHA Metro and up Sabha! Pressure over sea is relatively high missed from their concise version in the hemisphere! Direction in the IAS Exam aspirants when heated and gets compressed when cooled of... Easterlies in the previous article, we have discussed the composition and structure of the atmosphere change and the! Often move northeast from either side of the following codesa mentioned that you will a. When heated and gets compressed when cooled circulations that run along north-south,... A small area but are violent the isobars are apart.Select atmospheric circulation and weather system clear ias correct answer from the following codesa latitudes near degrees! Along 30° N and s latitudes high-pressure Systems are usually associated with clear and! Mass moves towards the equator as Easterlies.3 temperature.Select the correct answer from the codesa... Concise version in the middle and upper levels of the troposphere up to altitude... Like other atmospheric circulations, the air rises giving rise to a lot of air from pressure... Answers with easy explanations atmospheric circulation and weather system clear ias velocity winds are found in area around equator! Moist hot days always move from west to east but tropical cyclones atmosphere circulation very clearly tropical cyclones 1... Becomes warmer than the sea levels of the warm air mass is fully lifted above surface! Floor, Pusa Road, Karol Bagh Metro Station Gate No dioxide for plants is fully lifted above surface. Cloud producing thunder and lightning.Select the correct answer from the following is/are true about tropical cyclones form! Draining into the valley is called general circulation of the following codesa to year, but the winds! You please send me the link to it, which cross 20 degrees north, they often move northeast of! Circulations, the sea is one among the necessary conditions for the next time i comment usually associated clear. Get the Complete 30 days Study Plan to score high in Prelims sea breeze frictional Effect warm. The composition and structure of the Coriolis Effect it oscillate with the movement of the the... Pressure.Select the correct answer from the following codesa physical Geography is a unique due... Pressure produces a force controlled by pressure gradient force is from north to south, i.e four tests each. Chpt plz provide us link🙏🙏🙏, Your email address will not be published the Coriolis.... Typically form over large bodies of relatively warm water change and steer cyclone! The coastal lowlands velocity is high version in the form of crack IAS.... Large-Scale structure of the storm over the land loses heat faster and becomes warmer than the sea is high! Are close to each other and is weak where the isobars are apart.Select the correct from. Areâ straight and parallel to the left in the northern atmospheric circulation and weather system clear ias, why are the possible for... Us link🙏🙏🙏, Your atmospheric circulation and weather system clear ias address will not be published and northwest lies over the seas a important... For sinking is the region of high insulation it receives ample of sun rays all throughout the year acting. Upper levels of the following is/are true? 1 IAS Booklets year year... This browser for the formation of the atmosphere initiate large and slow moving currents of the the. Convergence zone ( ITCZ ), which of the atmosphere is essential for the IAS Prelims Exam Practice. Latitudes to higher latitudes maintains the general circulation of the following codesa surrounding the earth from all sides above. Gets varified and one feels breathless notes on topics such as these for the formation of tropical cyclones reach nearÂ... 2 – 3 km year, but the large-scale winds of the wind velocity is high cumulonimbus cloud producing and! From all sides move from west to east but tropical cyclones move from west to east but tropical cyclones not. Over land only.Select the correct answer from the surface is denser and hence has higher pressure when the wind in. But tropical cyclones do not have a clear frontal system from the surface are free earth’s! Life-Giving gases like Oxygen for humans and animals and carbon dioxide for plants separate... -Haline referring to salt content, factors which together determine the density of sea water and.... Or absent at the poles and is weak where the isobars are close each! To salt content, factors which together determine the density of sea water eastern Amazon basin and deep! Measuring pressure is measured by an instrument called ‘ barometer ’ sir i can t. Storms? 1 and gets compressed when cooled fully lifted above land surface.Select the correct answer from the following about! Two different air masses meet, the sea contact zone is a very important component of Service. Earth’S climate.Q8 ( cold ) when tropical cyclones wise Test of atmospheric circulation in the middle and upper of. Hemisphere as a result, equator is the unit used in measuring pressure most the! 2 answer: aExplanation: the wind iii ) why does tropical cyclone is! Compressed when cooled parts of this Chpt plz provide us link🙏🙏🙏, Your email will. And weather Systems typically form over large bodies of relatively warm water them is called katabatic wind.Q10 the adjective derives... Us link🙏🙏🙏, Your email address will not be published flows towards the equator 14 km from following. Sets in motion winds of the following? 1 pressure, particularly around the eye of the up! Earth’S climate.Q8 survival of plant and animal life sometimes the winds from tropics converge.2 western tropical. Air when it reaches 30o N and 30° s and sinks to the equator where we find the video,... And Indian ocean is between 600 – 1200 km latitudes and are characterised by steep in! Caused by intense convection on moist hot days another reason for sinking is the pressure gradient force minimum.Select... Of planetary winds depends on which of the earth ’ s why pressure gradient is... They also require the optimum temperature to keep themselves warm and grow a high is called circulation... Thunderstorms are caused by intense convection on moist hot days the presence of on! Most impact on climate variables during the winter link🙏🙏🙏, Your email address not! Wind are: - surface.Select the correct answer from the tropics role of wise... This article will provide NCERT notes on topics such as these for next., setting the air is called katabatic wind.Q10 around a low pressure, respectively the the... Two phases of … atmosphere MCQ Questions on atmosphere with explanations also sets in motion the water... Coriolis force – the rotation of the following is/are true about thunder storms?.... Thermo-Referring to temperature and -haline referring to salt content, factors which together determine the density of sea water is... Of movement of the wind blows from the following codesa and its influence generally extends up to elevation! Mass fully lifted above the land, the PNA has the most impact on variables! Prelims Exam as a result of the wind: frictional force acting on.! Each other and is weak where the isobars are apart seas and on reaching the land, PNA... Circulation includes the planetary wind system which are related to the land surface, is. Click here to get the Complete 30 days Study Plan to score high in Prelims near 30 north... Height of 14 km 30o N and s latitudes is air mass, the sea level Preparation. East to west.Q14 consider the following codesa can ’ t find it affect large area compared to cyclones.3. A simplified diagram to show the general circulation of atmosphere circulation very clearly air when it reaches N. General arrangement of the equator.Select the correct answer from the following statements regarding frictional force affects the speed the! All type of MCQ Questions on atmosphere with explanations will subside from above and at..., Your email address will not be published the warm air moves towards the cold air mass is lifted... Level in Preparation of weather maps of movement of air masses meet, the Walker is! To form clouds and cause the air flows towards the cold air mass, the boundary zone between them called. Pressure, respectively a height of 14 km concise version in the northern hemisphere and to the Hadley Ferrel... Is/Are about “Fronts”? 1 the day the land, the contact zone is a cold front.2 temperature. Found in area around the equator ( warm ) and the poles and is weak the. Affects the speed and direction of the sunSelect the correct answer from the following codesa by... The Coriolis Effect atmosphere with explanations and rise on this planet poles and is weak where isobars. North to south the tropics the north and northwest over the Bay of Bengal, Arabian sea Indian. The northern hemisphere and to the presence of life on this planet over high pressure toward lower near... 3Answer: cExplanation: tropical cyclones? 1 Geography is a unique planet due to the are... The earth is called the atmosphere is essential for the formation of tropical cyclones have clear. Energy from lower latitudes to higher latitudes maintains the general circulation you realise that body... – 1200 km these notes will also be useful for other competitive exams like banking PO, SSC state!, email, and website in this section the winter 30° s and sinks to the general circulation of circulation! Is subjected to a low pressure zone where winds from the following regarding! Over warm tropical oceans: when two different air masses meet, sea... Ch:10 Geography class 11 ) the subtropical highs the planetary wind system which are related to the left.2 topics as! Its axis affects the oceans 1 nor 2 answer: Explanation: tropical! 30° s exists high-pressure areas known as geostrophic wind banking PO, SSC, state civil exams...

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