Multiple choice questions. The warm surface conditions result in locally low pressure. In this video - Anirudh Malik will discuss Class 11 NCERT Geography - Atmospheric Circulation and Weather System. ATMOSPHERIC PRESSURE The pressure exerted by (the weight) of the air in the atmosphere 1sq.inch of air column taken at sea level measures 14psi Air pressure decreases with an increase in altitude because the amount of air above decreases with an increase in height Standard atmosphere … • the General Circulation of the atmosphere • ocean currents. 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.On average, this circulation corresponds to large-scale wind systems arranged in several east–west belts that encircle the Earth. Wind movement in the atmosphere may be classified into 3 broad categories: Primary, secondary and tertiary circulation. • In brief, the seasons, climates, climatic belts, vegetation belts, and the life style of people in the different regions of the world are directly or indirectly influenced by the Tricellular atmospheric circulation. Scales of Motion • Microscale –e.g. 1. Wind Examples Fig. ATMOSPHERIC CIRCULATION- PRESSURE BELTS 2. (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 (ii) The Inter Tropical Convergence Zone normally occurs: Primary circulation includes the planetary wind system which are related to the general arrangement of the pressure belts on the earth surface. Actions taken under the Montreal Protocol have led to decreases in the atmospheric abundance of controlled ozone-depleting substances (ODSs) and the start of the recovery of stratospheric ozone. The circulation cell closest to the equator is called the Hadley cell. • The formation of hot deserts, horse latitudes, roaring forties are because of the meridional circulation of the atmosphere. The warm air rises at the equator producing clouds and causing instability in the atmosphere. 7.1: Scales of atmospheric motion. The driving force behind atmospheric circulation is solar energy , which heats the atmosphere with different intensities at the equator, the middle latitudes, and the poles. Microscale →mesoscale →synoptic scale. This video contains detail explanation about Atmospheric circulation.it includes detail explanation about advection and convection and it's impact jet … The planet is unequivocally warming due to human influence [].Whilst the basic physics of global warming is clear, the response of the atmospheric circulation at the regional scale is less well known [2, 3].This poses a challenge to the attribution of past climate change to human influence and is a large source of uncertainty in climate projections. 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. Key findings of the Scientific Assessment of Ozone Depletion | UPSC – IAS. Atmospheric Circulation (Geography for IAS) Lesson 14 1. Formation of clear air … Atmospheric Circulation: Atmospheric circulation is the movement of air at all levels of the atmosphere over all parts of the planet . 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