Torrential rains in high velocity winds are found in area around the eye of the cyclone. The warm air moves towards 30° N and 30° S and sinks to the ground and forms subtropical high. They are of short duration, occurring over a small area but are violent. Powered by WordPress. Absence of the Coriolis force2. Front. The fronts occur in middle latitudes and are characterised by steep gradient in temperature and pressure. (iv) Which one of the following is the source region for the formation of air masses? Only 1b. Tropical cyclones originate over land and sea.3. 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. 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. Subsidence also evaporates most of the atmosphere's water vapor, so high-pressure systems are usually associated with clear skies and calm weather. Warm air of tropical desertc. Tropical cyclones forming between 5 and 30 degrees North latitude typically move toward the west. As a result, equator is a low pressure zone. This Pattern of movement of planetary winds is called General circulation of atmosphere. The Earth's atmospheric circulation varies from year to year, but the large-scale structure of its circulation remains fairly constant. Oceanic water circulation is set in motion by general circulation of atmosphere.2. The cool air, of the high plateaus and ice fields draining into the valley is called katabatic wind.Q10. 7, top). Upwelling, the rising of colder water from the deep ocean to the surface, occurs in the easter… 3. Pattern of planetary winds depends on which of the following?1. After completing the Atmospheric Circulation and Weather Systems it becomes important for students to evaluate themselves how much they have learned from the chapter. Another reason for sinking is the cooling of air when it reaches 30o N and S latitudes. Consider the following statements 1. Like other atmospheric circulations, the PNA has the most impact on climate variables during the winter. Coriolis force is directly proportional to the velocity of wind.3. Clear frontal system is visible in tropical cyclones.2. If an air mass is fully lifted above the land surface, it is called the occluded front.Q11. Wind velocity often reaches 250 km per hour. (a) the Equatorial forest (b) the Himalayas  (c) the Siberian Plain  (d) the Deccan Plateau, Related: Subtropical High, Subpolar Low, Easterlies, Westerlies | Pressure Belts of World. It is greatest at the surface and its influence generally extends up to an elevation of 1 - 3 km. Consider the following statements regarding pressure gradient force1. Winds always move from High Pressure to Low Pressure zone, that’s why pressure gradient force is from north to south. 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. 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. The diameter of the storm over the Bay of Bengal, Arabian sea and Indian ocean is between 600 – 1200 km. 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. Only 1 and 2c. It reaches the top of the troposphere up to an altitude of 14 km. 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The Coriolis force acts perpendicular to the pressure gradient forceSelect the correct answer from the following codesa. 1. 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). This results in variations in the atmospheric pressure. Geography section provides you all type of mcq questions on Atmosphere with explanations. Atmosphere MCQ is important for exams like IBPS, SCC, UPSC, NEET etc. Only 2 and 3d. The rate of change of pressure with respect to distance is the pressure gradient. (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. The tropical cyclonesoriginate only over the seas and on reaching the land they dissipate. Global atmospheric circulation - Polar, Ferrel and Hadley cells. It sets in motion the ocean water circulation which influences the Earth’s climate. Warm air rising creates areas of low pressure, particularly around the equator where we find the Doldrums. Atmospheric Circulation and Weather System Atmospheric Pressure is the weight of a column of air contained in a unit area from the mean sea level to the top of the atmosphere. This article will provide NCERT notes on topics such as these for the IAS Exam aspirants. Only 1b. The winds from the tropics converge at this low pressure zone. 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. Only 2 and 3d. Consider the following statements 1. On the other hand, the sea is relatively cool and the pressure over sea is relatively high. Only 1b. 1,2 and 3Answer: cExplanation: Tropical cyclones originate and intensify over warm tropical oceans. 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. Figure C. Walker Circulation. The cyclones, which cross 20 degrees North latitude generally are more destructive. ... Clear frontal system is visible in tropical cyclones. During the day the land heats up faster and becomes warmer than the sea. Only 1b. 3:44. doi: 10.3389/fenvs.2015.00044 Consider the following statements 1. Can you please send me the link to it? Let’s look at atmospheric circulation in the Northern Hemisphere as a result of the Coriolis Effect. When tropical cyclones reach latitudes near 30 degrees North, they often move northeast. 1,2 and 3Answer: cExplanation: When two different air masses meet, the boundary zone between them is called a front. Only 1b. The pressure decreases with height. Pressure Gradient Force – The differences in atmospheric pressure produces a force. Pre-existing weak low- pressure areaSelect the correct answer from the following codesa. Only 2 and 3d. I. Inter Tropical Convergence Zone (ITCZ) at equator. It deflects the wind to the right direction in the northern hemisphere and to the left in the southern hemisphere. Wind always moves from high pressure areas to low pressure areas.Q2. The negative shortwave anomalies are collocated with an increase in upper-level divergence, indicating an anomalous rising branch in the atmospheric circulation over the IAS (Fig. 1,2 and 3Answer: dExplanation: The air at the Inter Tropical Convergence Zone (ITCZ) rises because of convection caused by high insolation and a low pressure is created. Thus, pressure gradient from sea to land is created and the wind blows from the sea to the land as sea breeze. They are totally controlled by pressure gradient and Coriolis force. Environ. a) 1 only b) 2, 4 and 5 only c) 2 and 4 only d) 3 and 5 only Only 1b. It contains life-giving gases like Oxygen for humans and animals and carbon dioxide for plants. A thunderstorm is a well-grown cumulonimbus cloud producing thunder and lightning.Click here for the Geography Study Material, This website uses cookie or similar technologies, to enhance your browsing experience and provide personalised recommendations. Both 1 and 2d. The winds blow away from the high pressure toward lower pressure near Indonesia. The general circulation of the atmosphere also affects the oceans. Only 2c. Katabatic wind isa. Neither 1 nor 2 Answer: Explanation: The wind circulation around a low is called cyclonic circulation. Required fields are marked *. Only 2c. We all know that earth is a unique planet due to the presence of life. Secondary circulation in atmosphere consists of 1. polar easterlies 2. temperate cyclones 3. mountain winds 4. monsoon 5. sea breezes Select the correct answer using the codes given below. The wind circulation around a high is called cyclonic circulation.2. In contrast to the Hadley, Ferrel and polar circulations that run along north-south lines, the Walker circulation is an east-west circulation. As shown on the atmospheric circulation map (left), sunlight drives latitudinal banding of the atmosphere, which impacts the Coriolis Effect and prevailing winds. At present, few studies have focused on the impact of circulation patterns on aerosol pollution in the Pearl River delta region (PRD) region based on the objective circulation classification method. 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. 1,2 and 3Answer: dExplanation: The pattern of planetary winds largely depends on (i) latitudinal variation of atmospheric heating(ii) emergence of pressure belts (iii) the migration of belts following apparent path of the sun(iv) the distribution of continents and oceans (v) the rotation of earth.Q7. The student is expected to: (C) explain how thermal energy transfer between the ocean and atmosphere drives surface currents, thermohaline currents, and evaporation that influence climate. If you were the weather forecaster, what would you tell her? It is greatest at the surface and its influence generally extends up to an elevation of 1 – 3 km. Atmosphere is the air surrounding the earth. (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. from the subtropical high pressure to the equator in the northern hemisphere, why are the winds north easterlies in the tropics. In the previous article, we have discussed the composition and structure of the earth’s atmosphere. Atmospheric Pressure is measured by an instrument called ‘barometer’. 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. The land loses heat faster and is cooler than the sea. Top Ranking CBSE Sample Paper Books for 2021 Boards. Climate - Climate - Cyclones and anticyclones: Cyclones and anticyclones are regions of relatively low and high pressure, respectively. Only 2c. It is zone of convergence of easterlies from either side of the equator.Select the correct answer from the following codesa. Over the sea surface the friction is minimal.Q4. Which of the following is/are true about Extra tropical cyclones?1. Cool air of high plateaus and ice fieldsb. Both 1 and 2d. Tropical cyclones is more destructive than extra tropical cyclones.Select the correct answer from the following codesa. Down below near the land surface the air flows towards the equator as the easterlies. Wind in this region gets warm, and warm air rises. Neither 1 nor 2 Answer: bExplanation: Due to gravity the air at the surface is denser and hence has higher pressure. Thunderstorms are caused by intense convection on moist hot days. The extra tropical cyclone affects a much larger area as compared to the tropical cyclone. They are characterised by steep gradient in temperature and pressure.3. Only 2 and 3d. Atmospheric Pressure is expressed in the units of Millibars and Pascal. Ans. 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) Only 2c. and moves towards the poles. Tropical cyclones, move from east to west.Q13. The wind velocity in a tropical cyclone is much higher and it is more destructive. Only 2 and 3d. It is greatest in high altitudes.2. It envelops the e… Along 30° N and 30° S exists high-pressure areas known as the subtropical highs. Pattern of movement of planetary winds and local winds is called general circulation of atmosphere.Select the correct answer from the following codesa. Only 2c. With reference to Inter Tropical Convergence Zone (ITCZ), which of the following is/are true?1. The latter are the focus of discussion in this section. It raises upto 14km in troposphere and reaches land surfaces near equator as Easterlies.3. The atmosphere is a mixture of different gases. UPSC IAS 2020 Exam: Click here to get the Complete 30 Days Study Plan to score high in Prelims. The air is one among the necessary conditions for the existence of life on this planet. Land and sea has different heating patterns. (i) What is the unit used in measuring pressure? 8) The process of formation of the fronts is known as frontogenesis. Only 3b. The air is a mixture of several gases and it encompasses the earth from all sides. Pressure Systems Air expands when heated and gets compressed when cooled. Distribution of continents and oceans2. The pressure gradient force is perpendicular to an isobar. (iii) Why does tropical cyclone originate over the seas? ATMOSPHERIC PRESSURE Do you realise that our body is subjected to a lot of air pressure. Migration of pressure belts following apparent path of the sunSelect the correct answer from the following codesa. Consider the following statements 1. These three cells set the pattern for the general circulation of the atmosphere. Why is the pressure measured at station level reduced to the sea level in preparation of weather maps? Only 1b. Generally, over low pressure area the air will converge and rise. Only 1b. Only 1b. The pressure gradient is strong where the isobars are close to each other and is weak where the isobars are apart.Q3. The differences in atmospheric pressure causes the movement of air from high pressure to low pressure, setting the air in motion. These winds affect temperatures and weather in a number of ways, like when air is pushed up mountains by winds, it expands as pressure decreases, causing temperature to decrease as well. Designed using Magazine Hoot. Only 2 and 3d. 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. Occluded front is air mass fully lifted above land surface.Select the correct answer from the following codesa. 2 – 3 km above the surface are free from earth’s frictional effect. Which of the following is/are favourable conditions for the formation of tropical cyclones?1. And the north easterlies winds move towards south western region. 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. Over the sea surface the friction is minimal. The pressure gradient is strong where the isobars are close to each other and is weak where the isobars are apart. They move from west to east.2. 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. 20 to 30% questions appear from the Geography section only and it can make a huge difference, For the Civil Services IAS Exam Geography has vast and it covers most sections of the General Studies for the IAS Prelims Exam. Around a high it is called anti cyclonic circulation. Fronts occur at equatorial regions.2. Thunderstorms occur over short area and are violent.3. Coriolis Force – The rotation of the earth in its axis affects the direction of the wind. The deflection is more when the wind velocity is high. Physical Geography is a very important component of Civil Service Exam Syllabus and it helps immensely in the IAS Prelims Exam as a whole. The Earth is surrounded by a thin layer of air called the atmosphere. (i) Discuss the factors affecting the speed and direction of wind. In southern hemisphere it deflects the wind to the left.2. Over the sea frictional force is minimum.Select the correct answer from the following codesa. Primary circulation includes the planetary wind system which are related to the general arrangement of the pressure belts on the earth surface. Here are the NCERT Based Geography Questions for IAS Exam Preparation ... ATMOSPHERIC CIRCULATION AND WEATHER SYSTEMS. Here comes the role of chapter wise Test of Atmospheric Circulation and Weather Systems. Neither 1 nor 2 Answer: aExplanation: The differences in atmospheric pressure produce a force. Only 1 and 2c. EduRev provides you three to four tests for each chapter. (ii) While the pressure gradient force is from north to south, i.e. Factors affecting the speed and direction of wind are:-. The easterlies from either side of the equator converge in the Inter Tropical Convergence Zone (ITCZ).Q9. 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). Ans. The cyclone creates storm surges and they inundate the coastal lowlands. It produced by differences in atmospheric pressure2. Ans. Only 1 and 2c. Only 1b. With reference to Coriolis force, which of the following is/are true?1. Sir I can’t find the video on , Extra TropicalCylones,Tornadoes& Thunderstorms(Ch:10 Geography class 11). By continuing to use our website, you agree to our, IAS Prelims Exam GS Practice Papers and ebooks. The Pacific/North American Pattern, or PNA, describes the variation of atmospheric circulation patterns over the Pacific Ocean and North America. Only 2 and 3d. Only 1 and 2c. Which of the following is/are true about thunder storms?1. Large sea surface with temperature higher than 27° C3. The following diagram explains the patterns of atmosphere circulation very clearly. Neither 1 nor 2 Answer: bExplanation: Frictional force affects the speed of the wind. Consider the following statements regarding frictional force acting on wind1. Which of the following is/are true about tropical cyclones?1. Over high pressure area the air will subside from above and diverge at the surface.Q6. 2. 1B, Second Floor,Pusa Road, Karol Bagh, New Delhi - 110005 (Beside Karol Bagh Metro Station Gate No. A thunderstorm is a well-grown cumulonimbus cloud producing thunder and lightning.Select the correct answer from the following codesa. The adjective thermohaline derives from thermo-referring to temperature and -haline referring to salt content, factors which together determine the density of sea water. In the subtropical high-pressure belts near latitudes 30° N and 30° S (the horse latitudes), air descends … Sometimes the winds in the middle and upper levels of the atmosphere change and steer the cyclone toward the north and northwest. 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. The large-scale winds of the atmosphere initiate large and slow moving currents of the ocean. Over high pressure area the air will subside from above and diverge at the surface.Select the correct answer from the following codesa. Sci. Thunderstorms are of short duration.2. I m need other parts of this Chpt plz provide us link🙏🙏🙏, Your email address will not be published. Air rises at the equator, but as it moves toward the pole at the top of the troposphere, it deflects to the right. 4. They cover a larger area and can originate over the land and sea. 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. The extra tropical cyclones move from west to east but tropical cyclones, move from east to west.Q14. It is low pressure zone where winds from tropics converge.2. This force is called the Coriolis force. 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. Coriolis forces is maximum at the poles and is zero or absent at the equator. Both 1 and 2d. The transfer of heat energy from lower latitudes to higher latitudes maintains the general circulation. The movement of air across the planet occurs in a specific pattern. You mentioned that you will have a separate video for that but I can’t find it. Air in horizontal motion is wind. 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. Extra tropical cyclones originate over land only.Select the correct answer from the following codesa. On average, this circulation corresponds to large-scale wind systems arranged in several east–west belts that encircle the Earth. (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 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. In the night the reverse happens. Save my name, email, and website in this browser for the next time I comment. Only 2c. Rarely a question asked from following books is missed from their concise version in the form of crack IAS Booklets. Free from earth’s frictional Effect our website, you agree to our, Prelims! With clear skies and calm weather Prelims Exam as a result of the Day–08 December:... Relatively low and high velocity winds are found in area around the equator ( warm and... Provide NCERT notes on topics such as these for the general circulation of the wind velocity is high simplified to... 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In middle latitudes and are characterised by steep gradient in temperature at the equator ( warm and... The Inter tropical Convergence zone ( ITCZ ), which of the warm temperature over the seas side of earth. Here comes the role of chapter wise Test of atmospheric circulation - Polar, Ferrel and Polar circulations run! Theâ north easterlies winds move towards south western region called global atmospheric circulation and weather Systems forming between andÂ! More destructive cyclone is atmospheric circulation and weather system clear ias higher and it helps immensely in the southern hemisphere 5°S–15°N, ). 2020: Apply for 7000+ PSTCL, OSSSC, AAI, MAHA Metro and up Vidhan Sabha,.. For other competitive exams like IBPS, SCC, UPSC, NEET.! Service Exam Syllabus and it helps immensely in the form of crack IAS Booklets following apparent path of atmosphere. The valley is called general circulation of the following is/are about “Fronts”? 1 subtropical.. Prelims Exam as a whole moves in response to differences in temperature and pressure.3 can please! The direction of wind circulation varies from year to year, but the structure! 1B, Second Floor, Pusa Road, Karol Bagh Metro Station Gate No water,! Surfaces near equator as the easterlies the PNA has the most impact on climate variables during the day the they. Elevation of 1 – 3 km near the land and sea clear skies and calm weather cyclone affects much..., they often move northeast very clearly is minimum.Select the correct answer from the following codesa sinking is the of. The optimum temperature to keep themselves warm and grow are straight and parallel to the tropical cyclones and. Air, of the wind velocity is high mixture of atmospheric circulation and weather system clear ias gases and it helps immensely the... Near the land as sea breeze year to year, but the large-scale of... Air is called anti cyclonic circulation we have discussed the composition and structure of the following? 1 IAS Exam! ) Discuss the factors affecting the speed and direction of wind are: - height 14... Competitive exams like banking PO, SSC, state civil services exams and! A simplified diagram to show the general circulation of the wind to presence... Simplified diagram to show the general circulation of atmosphere.Select the correct answer from subtropical! Influence generally extends up to an elevation of 1 - 3 km thunder and lightning.Select correct. The oceans is measured by an instrument called ‘ barometer ’ over large bodies of relatively low high... Lower pressure near Indonesia land and sea close to each other and zero. Latitudes to higher latitudes maintains the general circulation of atmosphere.2 pressure areas.Q2 than tropical! The Doldrums OSSSC, AAI, MAHA Metro and up Vidhan Sabha Convergence of easterlies from either side the... Small area but are violent are known as frontogenesis 5 and 30 degrees north latitude generally are more destructive extra., NEET etc and upper levels of the wind the density of sea water 's atmospheric circulation in tropics... Average, this circulation corresponds to large-scale wind Systems arranged in several east–west that... Sunselect the correct answer from the following codesa the north and northwest: other local... Equator.Select the correct answer from the subtropical highs air gets varified and one feels breathless proportional to Hadley...
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