{"id":9365,"date":"2023-09-12T20:15:45","date_gmt":"2023-09-12T20:15:45","guid":{"rendered":"https:\/\/edukemy.com\/blog\/?p=9365"},"modified":"2023-12-26T09:39:59","modified_gmt":"2023-12-26T09:39:59","slug":"pressure-systems-and-wind-systems-geography-notes","status":"publish","type":"post","link":"https:\/\/edukemy.com\/blog\/pressure-systems-and-wind-systems-geography-notes\/","title":{"rendered":"Pressure Systems and Wind Systems &#8211; Geography Notes"},"content":{"rendered":"\n<figure class=\"wp-block-gallery has-nested-images columns-default is-cropped wp-block-gallery-1 is-layout-flex wp-block-gallery-is-layout-flex\"><\/figure>\n\n\n\n<p>Pressure systems and wind systems play a pivotal role in shaping the Earth&#8217;s atmospheric dynamics, influencing weather patterns and climate across the globe. These interconnected phenomena are fundamental components of atmospheric circulation, a complex and dynamic process that governs the movement of air masses. Pressure systems, characterized by variations in atmospheric pressure, drive the atmospheric flow, creating high and low-pressure areas that set the stage for the development of winds. Winds, in turn, are the horizontal movement of air from high-pressure regions to low-pressure regions, forming intricate patterns that define weather systems. Understanding the interplay between pressure systems and wind systems is essential for unraveling the mysteries of weather and climate, providing invaluable insights into the forces that drive our planet&#8217;s atmospheric behavior. This exploration delves into the fascinating world of geography, where the dance of air masses and pressure differentials choreograph the ever-changing spectacle of the Earth&#8217;s weather.<\/p>\n\n\n\n<div id=\"ez-toc-container\" class=\"ez-toc-v2_0_73 counter-hierarchy ez-toc-counter ez-toc-grey ez-toc-container-direction\">\n<label for=\"ez-toc-cssicon-toggle-item-69f6f01df04db\" class=\"ez-toc-cssicon-toggle-label\"><p class=\"ez-toc-title\" style=\"cursor:inherit\">Table of Contents<\/p>\n<span class=\"ez-toc-cssicon\"><span class=\"eztoc-hide\" style=\"display:none;\">Toggle<\/span><span class=\"ez-toc-icon-toggle-span\"><svg style=\"fill: #999;color:#999\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" class=\"list-377408\" width=\"20px\" height=\"20px\" viewBox=\"0 0 24 24\" fill=\"none\"><path d=\"M6 6H4v2h2V6zm14 0H8v2h12V6zM4 11h2v2H4v-2zm16 0H8v2h12v-2zM4 16h2v2H4v-2zm16 0H8v2h12v-2z\" fill=\"currentColor\"><\/path><\/svg><svg style=\"fill: #999;color:#999\" class=\"arrow-unsorted-368013\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"10px\" height=\"10px\" viewBox=\"0 0 24 24\" version=\"1.2\" baseProfile=\"tiny\"><path d=\"M18.2 9.3l-6.2-6.3-6.2 6.3c-.2.2-.3.4-.3.7s.1.5.3.7c.2.2.4.3.7.3h11c.3 0 .5-.1.7-.3.2-.2.3-.5.3-.7s-.1-.5-.3-.7zM5.8 14.7l6.2 6.3 6.2-6.3c.2-.2.3-.5.3-.7s-.1-.5-.3-.7c-.2-.2-.4-.3-.7-.3h-11c-.3 0-.5.1-.7.3-.2.2-.3.5-.3.7s.1.5.3.7z\"\/><\/svg><\/span><\/span><\/label><input type=\"checkbox\"  id=\"ez-toc-cssicon-toggle-item-69f6f01df04db\"  \/><nav><ul class='ez-toc-list ez-toc-list-level-1 ' ><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-1\" href=\"https:\/\/edukemy.com\/blog\/pressure-systems-and-wind-systems-geography-notes\/#Pressure_Systems\" title=\"Pressure Systems\">Pressure Systems<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-2\" href=\"https:\/\/edukemy.com\/blog\/pressure-systems-and-wind-systems-geography-notes\/#Air_Pressure\" title=\"Air Pressure\">Air Pressure<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"https:\/\/edukemy.com\/blog\/pressure-systems-and-wind-systems-geography-notes\/#Measurement_of_Air_Pressure\" title=\"Measurement of Air Pressure\">Measurement of Air Pressure<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-4\" href=\"https:\/\/edukemy.com\/blog\/pressure-systems-and-wind-systems-geography-notes\/#Vertical_Variation_of_Pressure\" title=\"Vertical Variation of Pressure\">Vertical Variation of Pressure<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-5\" href=\"https:\/\/edukemy.com\/blog\/pressure-systems-and-wind-systems-geography-notes\/#Horizontal_Distribution_of_Pressure\" title=\"Horizontal Distribution of Pressure\">Horizontal Distribution of Pressure<\/a><ul class='ez-toc-list-level-4' ><li class='ez-toc-heading-level-4'><a class=\"ez-toc-link ez-toc-heading-6\" href=\"https:\/\/edukemy.com\/blog\/pressure-systems-and-wind-systems-geography-notes\/#The_seven_pressure_belts_are\" title=\"The seven pressure belts are :\">The seven pressure belts are :<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-7\" href=\"https:\/\/edukemy.com\/blog\/pressure-systems-and-wind-systems-geography-notes\/#Closed_Isobars_or_Closed_Pressure_Centers\" title=\"Closed Isobars or Closed Pressure Centers\">Closed Isobars or Closed Pressure Centers<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-8\" href=\"https:\/\/edukemy.com\/blog\/pressure-systems-and-wind-systems-geography-notes\/#World_Distribution_of_Sea_Level_Pressure\" title=\"World Distribution of Sea Level Pressure\">World Distribution of Sea Level Pressure<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-9\" href=\"https:\/\/edukemy.com\/blog\/pressure-systems-and-wind-systems-geography-notes\/#Pressure_Belts\" title=\"Pressure Belts\">Pressure Belts<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-10\" href=\"https:\/\/edukemy.com\/blog\/pressure-systems-and-wind-systems-geography-notes\/#Equatorial_Low-Pressure_Belt_or_%E2%80%98Doldrums\" title=\"Equatorial Low-Pressure Belt or \u2018Doldrums\u2019\">Equatorial Low-Pressure Belt or \u2018Doldrums\u2019<\/a><ul class='ez-toc-list-level-4' ><li class='ez-toc-heading-level-4'><a class=\"ez-toc-link ez-toc-heading-11\" href=\"https:\/\/edukemy.com\/blog\/pressure-systems-and-wind-systems-geography-notes\/#Formation\" title=\"Formation\">Formation<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-4'><a class=\"ez-toc-link ez-toc-heading-12\" href=\"https:\/\/edukemy.com\/blog\/pressure-systems-and-wind-systems-geography-notes\/#Climate\" title=\"Climate\">Climate<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-13\" href=\"https:\/\/edukemy.com\/blog\/pressure-systems-and-wind-systems-geography-notes\/#Subtropical_High-Pressure_Belt_or_Horse_Latitudes\" title=\"Subtropical High-Pressure Belt or Horse Latitudes\">Subtropical High-Pressure Belt or Horse Latitudes<\/a><ul class='ez-toc-list-level-4' ><li class='ez-toc-heading-level-4'><a class=\"ez-toc-link ez-toc-heading-14\" href=\"https:\/\/edukemy.com\/blog\/pressure-systems-and-wind-systems-geography-notes\/#Formation-2\" title=\"Formation\">Formation<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-4'><a class=\"ez-toc-link ez-toc-heading-15\" href=\"https:\/\/edukemy.com\/blog\/pressure-systems-and-wind-systems-geography-notes\/#Climate-2\" title=\"Climate\">Climate<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-16\" href=\"https:\/\/edukemy.com\/blog\/pressure-systems-and-wind-systems-geography-notes\/#Horse_Latitudes\" title=\"Horse Latitudes\">Horse Latitudes<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-17\" href=\"https:\/\/edukemy.com\/blog\/pressure-systems-and-wind-systems-geography-notes\/#Frequently_Asked_Questions_FAQs\" title=\"Frequently Asked Questions (FAQs)\">Frequently Asked Questions (FAQs)<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-18\" href=\"https:\/\/edukemy.com\/blog\/pressure-systems-and-wind-systems-geography-notes\/#1_What_is_the_relationship_between_pressure_systems_and_wind_movement\" title=\"1. What is the relationship between pressure systems and wind movement?\">1. What is the relationship between pressure systems and wind movement?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-19\" href=\"https:\/\/edukemy.com\/blog\/pressure-systems-and-wind-systems-geography-notes\/#2_How_do_local_wind_systems_such_as_sea_breezes_form_and_influence_weather_patterns\" title=\"2. How do local wind systems, such as sea breezes, form and influence weather patterns?\">2. How do local wind systems, such as sea breezes, form and influence weather patterns?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-20\" href=\"https:\/\/edukemy.com\/blog\/pressure-systems-and-wind-systems-geography-notes\/#3_How_do_global_wind_belts_such_as_the_trade_winds_and_westerlies_impact_climate_and_navigation\" title=\"3. How do global wind belts, such as the trade winds and westerlies, impact climate and navigation?\">3. How do global wind belts, such as the trade winds and westerlies, impact climate and navigation?<\/a><ul class='ez-toc-list-level-4' ><li class='ez-toc-heading-level-4'><a class=\"ez-toc-link ez-toc-heading-21\" href=\"https:\/\/edukemy.com\/blog\/pressure-systems-and-wind-systems-geography-notes\/#In_case_you_still_have_your_doubts_contact_us_on_9811333901\" title=\"In case you still have your doubts, contact us on 9811333901.&nbsp;\">In case you still have your doubts, contact us on 9811333901.&nbsp;<\/a><\/li><\/ul><\/li><\/ul><\/li><\/ul><\/nav><\/div>\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Pressure_Systems\"><\/span>Pressure Systems<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<ul class=\"wp-block-list\"><li>Air expands when heated and gets compressed when cooled. This results in variations in the atmospheric pressure.<\/li><li>Conversely, when air is cooled, it becomes dense and sinks, creating an area of high pressure.&nbsp;<\/li><li>The movement of air from high pressure to low pressure is what causes wind.<\/li><li>Without this process, there would be large temperature differences between different latitudes, leading to more extreme weather conditions and potentially even making the planet uninhabitable.<\/li><li>The wind is the movement of air horizontally from high-pressure areas to low-pressure areas, and it plays a crucial role in redistributing heat and moisture across the planet.<\/li><li>When moist air rises, it cools as it gains altitude, and the water vapor in the air condenses into tiny droplets, forming clouds.&nbsp;<\/li><\/ul>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Air_Pressure\"><\/span>Air Pressure<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<ul class=\"wp-block-list\"><li>Air has mass, and therefore, it also has weight. The weight of the air above a particular point on the Earth&#8217;s surface exerts a force in all directions, which is what we refer to as atmospheric pressure.&nbsp;<\/li><li>The weight of the column of air that extends from the mean sea level to the top of the atmosphere is referred to as the atmospheric column, and the pressure exerted by this column on a unit area of the Earth&#8217;s surface is what we call atmospheric pressure.&nbsp;<\/li><li>The choice of the unit often depends on the country or region in which the measurement is being made, as well as the discipline or application in which the measurement is being used.<\/li><\/ul>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Measurement_of_Air_Pressure\"><\/span>Measurement of Air Pressure<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<ul class=\"wp-block-list\"><li>Atmospheric pressure is indeed measured using an instrument called a barometer, which measures the weight of the column of air above it at any given place and time.<\/li><li>The standard unit used by meteorologists for measuring atmospheric pressure is the millibar (mb). One millibar is equal to the force of one gram on a square centimeter.<\/li><li>A pressure of 1000 millibars is equivalent to a weight of 1.053 kilograms per square centimeter.<\/li><li>In terms of the height of a column of mercury, a pressure of 1000 mb is equal to the weight of a column of mercury that is 75 centimeters high.&nbsp;<\/li><li>Therefore, the normal pressure at sea level, which is approximately 1013.25 millibars, is equivalent to a column of mercury that is about 76 centimeters high.<\/li><li>It&#8217;s worth noting that atmospheric pressure can vary widely depending on factors such as weather patterns, altitude, and geographic location.<\/li><\/ul>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Vertical_Variation_of_Pressure\"><\/span>Vertical Variation of Pressure<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<ul class=\"wp-block-list\"><li>This variation in pressure with height creates a pressure gradient, which is the driving force for the movement of air from high pressure to low pressure.&nbsp;<\/li><li>The vertical pressure gradient force, as you mentioned, is much larger than the horizontal pressure gradient force, but it is generally balanced by the gravitational force, resulting in the absence of strong upward winds.<\/li><li>The decrease in pressure with height is not constant and depends on several factors, including temperature, amount of water vapor, and gravity.&nbsp;<\/li><li>On average, however, the atmospheric pressure decreases at a rate of about 34 millibars for every 300 meters of height.<\/li><li>It&#8217;s also worth noting that temperature and density play a crucial role in determining atmospheric pressure.&nbsp;<\/li><li>The variation in atmospheric pressure is a critical factor in determining the movement of air in the atmosphere, and its effects can be seen in weather patterns, air circulation, and other atmospheric phenomena.<\/li><li>A rising pressure indicates fine, settled weather, while a falling pressure indicates unstable and cloudy weather.<\/li><\/ul>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Horizontal_Distribution_of_Pressure\"><\/span>Horizontal Distribution of Pressure<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<ul class=\"wp-block-list\"><li>Small pressure differences are significant in determining wind direction and velocity, and isobars are a way to represent the horizontal distribution of pressure.<\/li><li>Isobars are drawn on weather maps to connect areas of equal atmospheric pressure, allowing meteorologists to visualize areas of high and low pressure and track their movement over time.<\/li><li>The seven pressure belts on Earth&#8217;s surface are the Equatorial Low-Pressure Belt, Subtropical High-Pressure Belts (two belts &#8211; one in each hemisphere), the Subpolar Low-Pressure Belts (two belts &#8211; one in each hemisphere), and the Polar High-Pressure Belts (two belts &#8211; one in each hemisphere).\u00a0<\/li><li>These belts are formed due to differences in solar heating and the rotation of the Earth, and they play a major role in determining global wind patterns and weather conditions.\u00a0<\/li><\/ul>\n\n\n\n<h4 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"The_seven_pressure_belts_are\"><\/span>The seven pressure belts are :<span class=\"ez-toc-section-end\"><\/span><\/h4>\n\n\n\n<ol class=\"wp-block-list\"><li>Equatorial low-pressure belt.<\/li><li>Sub-Tropical high-pressure belt \u2013 Northern hemisphere.<\/li><li>Sub-Tropical high-pressure belt \u2013 Southern hemisphere.<\/li><li>Sub-polar low-pressure belt \u2013 Northern hemisphere.<\/li><li>Sub-polar low-pressure belt \u2013 Southern hemisphere.<\/li><li>Polar high-pressure belt \u2013 Northern hemisphere.<\/li><\/ol>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter\"><img decoding=\"async\" data-src=\"https:\/\/lh3.googleusercontent.com\/6McFj72tqsVO_6K3tw-xJJXVpof4NE12obwYDJEJb0kY6Jx1k_w3ikpAj5O9tfGAUIzjqKYlsA6HrmRnFvkWYjX1hFeULfwFIFu4a9Y6XUnuqSLmcKkDktkGW_BrzI9vnYBQpC_tSENN5Id1tIDhmNE\" alt=\"\" src=\"data:image\/gif;base64,R0lGODlhAQABAAAAACH5BAEKAAEALAAAAAABAAEAAAICTAEAOw==\" class=\"lazyload\" \/><\/figure><\/div>\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Closed_Isobars_or_Closed_Pressure_Centers\"><\/span>Closed Isobars or Closed Pressure Centers<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<ul class=\"wp-block-list\"><li>In a low-pressure system, the pressure decreases outward from the center and is enclosed by isobars with progressively increasing pressure.&nbsp;<\/li><li>On the other hand, in a high-pressure system, the pressure increases outward from the center and is enclosed by isobars with progressively decreasing pressure.&nbsp;<\/li><\/ul>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter\"><img decoding=\"async\" data-src=\"https:\/\/lh5.googleusercontent.com\/b3VWqZA-jU8fs1-ITqnMLuZ7WTvJQ8Zyiq2KPlZHf6bCBQDHcttbBQmUJi2SL8iAQOZFuU9Q0BbvJvs5fjvPSJAbEiKT4ZuUwg2ePW1CdDMAwaRh4rFRFR6E91ouqO60iE_ymlRDflP6ugO_67e-RIc\" alt=\"\" src=\"data:image\/gif;base64,R0lGODlhAQABAAAAACH5BAEKAAEALAAAAAABAAEAAAICTAEAOw==\" class=\"lazyload\" \/><\/figure><\/div>\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"World_Distribution_of_Sea_Level_Pressure\"><\/span>World Distribution of Sea Level Pressure<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<ul class=\"wp-block-list\"><li>It&#8217;s important to note that the standard atmospheric pressure at sea level is actually about 1013.25 millibars or 1 atmosphere (atm), which is equivalent to 1.01325 x 10^5 pascals (Pa) or 14.7 pounds per square inch (psi).<\/li><li>This amount of pressure is exerted by the atmosphere at sea level on all animals, plants, rocks, etc.<\/li><li>The equatorial low-pressure belt is also known as the Intertropical Convergence Zone (ITCZ) and is characterized by rising warm air, abundant rainfall, and thunderstorms.<\/li><li>30\u00b0 N and 30\u00b0 S are found in high-pressure areas known as subtropical highs.<\/li><li>Further pole wards along 60\u00b0 N and 60\u00b0 S, the low-pressure belts are termed as the subpolar lows.&nbsp;<\/li><li>The polar highs are areas of descending cold air and dry weather, characterized by high pressure and low temperatures.<\/li><\/ul>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Pressure_Belts\"><\/span>Pressure Belts<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Equatorial_Low-Pressure_Belt_or_%E2%80%98Doldrums\"><\/span>Equatorial Low-Pressure Belt or \u2018Doldrums\u2019<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<ul class=\"wp-block-list\"><li>The equatorial low-pressure belt is also known as the Intertropical Convergence Zone (ITCZ) and is located between 10\u00b0N and 10\u00b0S latitudes.&nbsp;<\/li><li>The width of the belt can vary between 5\u00b0N and 5\u00b0S and 20\u00b0N and 20\u00b0S. It is the zone of convergence of trade winds from two hemispheres from subtropical high-pressure belts, resulting in low pressure and rising air.&nbsp;<\/li><li>The rising air leads to the formation of clouds and precipitation.&nbsp;<\/li><li>The belt is also called the Doldrums because of the light and variable winds that make sailing difficult.&nbsp;<\/li><li>The position of the belt varies with the apparent movement of the Sun.<\/li><\/ul>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter\"><img decoding=\"async\" data-src=\"https:\/\/lh4.googleusercontent.com\/YML7PafD8d_hLdkoOkjlNr5y961tEZ-o8BnXOMRsgsegbDuXa7gIkNlB8FkIlu_io3_bjHEhNgJ_VbJu-AWm0_nfRpV0xvtODAnmpWJNFU53O37XwOiY5BUM1Ndy1Jbw9enw-5IOhLmDA5j35D3tv0I\" alt=\"\" src=\"data:image\/gif;base64,R0lGODlhAQABAAAAACH5BAEKAAEALAAAAAABAAEAAAICTAEAOw==\" class=\"lazyload\" \/><\/figure><\/div>\n\n\n<h4 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Formation\"><\/span>Formation<span class=\"ez-toc-section-end\"><\/span><\/h4>\n\n\n\n<ul class=\"wp-block-list\"><li>The intense heating over the equatorial region causes the air to rise, which creates an area of low pressure at the surface.&nbsp;<\/li><li>This low-pressure area is known as the equatorial low-pressure belt or the inter-tropical convergence zone (ITCZ).&nbsp;<\/li><li>The rising air cools as it ascends and forms clouds, leading to frequent precipitation in the region.<\/li><\/ul>\n\n\n\n<h4 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Climate\"><\/span>Climate<span class=\"ez-toc-section-end\"><\/span><\/h4>\n\n\n\n<ul class=\"wp-block-list\"><li>This belt is characterized by extremely low pressure with calm conditions.<\/li><li>The low-pressure belt along the equator is characterized by high humidity as a result of the large amounts of moisture carried by the winds over the oceans.&nbsp;<\/li><li>As the warm, moist air rises in the equatorial low-pressure belt, it cools and water vapor condenses to form cumulonimbus clouds, which are often associated with thunderstorms. This process of rainfall is called convectional rainfall.<\/li><li>The Coriolis force, which is caused by the rotation of the earth, deflects moving objects to the right in the Northern Hemisphere and to the left in the Southern Hemisphere. At the equator, the Coriolis force is zero because the rotational speed of the earth is highest at the equator and decreases towards the poles.&nbsp;<\/li><\/ul>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter\"><img decoding=\"async\" data-src=\"https:\/\/lh4.googleusercontent.com\/gFNR_cNajeBqg-tLq3YPXPApVkMV1FKULby4YkA0YXS9822uXvs0tcE6_SU76hrj40poV0bCKeTPJtl3SUE6RMsrE7ETYdpb1KmPlaB51iHdXFGqPXkuMT-Gp5hqmRqjZZ1IL-3L32v2lb1euVP6pag\" alt=\"\" src=\"data:image\/gif;base64,R0lGODlhAQABAAAAACH5BAEKAAEALAAAAAABAAEAAAICTAEAOw==\" class=\"lazyload\" \/><\/figure><\/div>\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Subtropical_High-Pressure_Belt_or_Horse_Latitudes\"><\/span>Subtropical High-Pressure Belt or Horse Latitudes<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<ul class=\"wp-block-list\"><li>The subtropical highs extend from near the tropics to about 35\u00b0N and S.<\/li><\/ul>\n\n\n\n<h4 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Formation-2\"><\/span>Formation<span class=\"ez-toc-section-end\"><\/span><\/h4>\n\n\n\n<ul class=\"wp-block-list\"><li>After saturation (complete loss of moisture) at the ITCZ, the air moving away from equatorial low-pressure belts in the upper troposphere becomes dry and cold.<\/li><li>This dry and cold wind subsides at 30\u00b0N and S.<\/li><li>So the high pressure along this belt is due to the subsidence of air coming from the equatorial region which descends after becoming heavy.<\/li><li>The subsiding air from the equator is deflected towards the poles, creating a circulation cell known as the Hadley cell.&nbsp;<\/li><li>The high-pressure belts at around 30\u00b0N and S are due to a combination of factors, including the subsidence of dry and cold air from the equatorial region and the Coriolis force, which deflects the subsiding air toward the poles.<\/li><\/ul>\n\n\n\n<h4 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Climate-2\"><\/span>Climate<span class=\"ez-toc-section-end\"><\/span><\/h4>\n\n\n\n<ul class=\"wp-block-list\"><li>The subsiding air is warm and dry, therefore, most of the deserts are present along this belt, in both hemispheres.<\/li><li>A calm condition (anticyclonic) with feeble winds is created in this high-pressure belt.<\/li><li>The descending air currents feed the winds blowing towards adjoining low-pressure belts.<\/li><li>This belt is frequently invaded by tropical and extratropical disturbances.<\/li><\/ul>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Horse_Latitudes\"><\/span>Horse Latitudes<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<ul class=\"has-normal-font-size wp-block-list\"><li>The corresponding latitudes of sub-tropical high-pressure belts are called horse latitudes.<\/li><li>In the early days, sailing vessels with a cargo of horses found it difficult to sail under the calm conditions of this high-pressure belt.<\/li><li>They used to throw horses into the sea when fodder ran out. Hence the name horse latitudes.<\/li><\/ul>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Frequently_Asked_Questions_FAQs\"><\/span>Frequently Asked Questions (FAQs)<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"1_What_is_the_relationship_between_pressure_systems_and_wind_movement\"><\/span><strong>1. What is the relationship between pressure systems and wind movement?<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p><em>Answer:<\/em> Pressure systems and wind movement are closely interconnected. Differences in atmospheric pressure create pressure gradients, causing air to move from high-pressure areas to low-pressure areas. Winds result from the Earth&#8217;s attempt to balance these pressure differences. In high-pressure systems, air descends and diverges at the surface, creating anticyclonic (clockwise in the Northern Hemisphere, counterclockwise in the Southern Hemisphere) wind patterns. In low-pressure systems, air converges and ascends, leading to cyclonic (counterclockwise in the Northern Hemisphere, clockwise in the Southern Hemisphere) wind patterns.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"2_How_do_local_wind_systems_such_as_sea_breezes_form_and_influence_weather_patterns\"><\/span><strong>2. How do local wind systems, such as sea breezes, form and influence weather patterns?<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p><em>Answer:<\/em> Local wind systems, like sea breezes, form due to temperature differences between land and water. During the day, land heats up more quickly than water. This temperature contrast leads to lower pressure over the land and higher pressure over the water, causing a sea breeze to develop. Sea breezes typically blow from the cooler sea towards the warmer land during the day, providing relief in coastal areas. At night, the process reverses as land cools faster than water, creating a land breeze. These local wind systems influence weather patterns by moderating temperatures along coastlines and affecting cloud formation and precipitation.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"3_How_do_global_wind_belts_such_as_the_trade_winds_and_westerlies_impact_climate_and_navigation\"><\/span><strong>3. How do global wind belts, such as the trade winds and westerlies, impact climate and navigation?<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p><em>Answer:<\/em> Global wind belts play a crucial role in shaping climate and navigation. The trade winds, blowing towards the equator from subtropical high-pressure zones, influence tropical climates by bringing warm, moist air. Westerlies, flowing from subtropical high-pressure zones to subpolar low-pressure areas, affect mid-latitudinal climates. These wind belts influence the distribution of rainfall and temperature. In terms of navigation, historic trade routes were often strategically chosen to take advantage of prevailing winds. Understanding global wind patterns is essential for efficient maritime navigation and has historically influenced the exploration and trade routes of sailors.<\/p>\n\n\n<h4><span class=\"ez-toc-section\" id=\"In_case_you_still_have_your_doubts_contact_us_on_9811333901\"><\/span><strong>In case you still have your doubts, contact us on 9811333901.<\/strong>&nbsp;<span class=\"ez-toc-section-end\"><\/span><\/h4>\n<p><!-- \/wp:heading --><!-- wp:paragraph --><\/p>\n<p>For UPSC Prelims Resources, <a href=\"https:\/\/edukemy.com\/upsc-cse-prelims-resource-centre\" target=\"_blank\" rel=\"noreferrer noopener\">Click here<\/a><\/p>\n<p><!-- \/wp:paragraph --><!-- wp:paragraph --><\/p>\n<p>For Daily Updates and Study Material:<\/p>\n<p><!-- \/wp:paragraph --><!-- wp:paragraph --><\/p>\n<p>Join our Telegram Channel &#8211; <a href=\"https:\/\/t.me\/WithEdukemy4IAS\" target=\"_blank\" rel=\"noreferrer noopener\">Edukemy for IAS<\/a><\/p>\n<p><!-- \/wp:paragraph --><!-- wp:list --><\/p>\n<ul>\n<li>1. Learn through Videos &#8211; <a href=\"https:\/\/bit.ly\/3vOD8sU\" target=\"_blank\" rel=\"noreferrer noopener\">here<\/a><\/li>\n<li>2. Be Exam Ready by Practicing Daily MCQs &#8211; <a href=\"https:\/\/bit.ly\/3Q9z2nF\" target=\"_blank\" rel=\"noreferrer noopener\">here<\/a><\/li>\n<li>3. Daily Newsletter &#8211; Get all your Current Affairs Covered &#8211; <a href=\"https:\/\/bit.ly\/3bE2y5J\" target=\"_blank\" rel=\"noreferrer noopener\">here<\/a><\/li>\n<li>4. Mains Answer Writing Practice &#8211; <a href=\"https:\/\/bit.ly\/3mZuVxl\" target=\"_blank\" rel=\"noreferrer noopener\">here<\/a><\/li>\n<\/ul>\n<p><!-- \/wp:list --><!-- wp:paragraph --><\/p>\n<p>Visit our YouTube Channel &#8211; <a href=\"https:\/\/www.youtube.com\/@ShabbirsEduKemyforIAS\" target=\"_blank\" rel=\"noreferrer noopener\">here<\/a><\/p>","protected":false},"excerpt":{"rendered":"<p>Pressure systems and wind systems play a pivotal role in shaping the Earth&#8217;s atmospheric dynamics, influencing weather patterns and climate across the globe.<\/p>\n","protected":false},"author":17,"featured_media":10201,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_eb_attr":"","om_disable_all_campaigns":false,"_monsterinsights_skip_tracking":false,"_monsterinsights_sitenote_active":false,"_monsterinsights_sitenote_note":"","_monsterinsights_sitenote_category":0,"_uf_show_specific_survey":0,"_uf_disable_surveys":false,"_lmt_disableupdate":"","_lmt_disable":"","footnotes":""},"categories":[261],"tags":[264,1100,232,140],"class_list":["post-9365","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-geography-general-studies","tag-geography","tag-pressure-systems","tag-upsc","tag-upsc_preparation_strategy"],"aioseo_notices":[],"_links":{"self":[{"href":"https:\/\/edukemy.com\/blog\/wp-json\/wp\/v2\/posts\/9365","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/edukemy.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/edukemy.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/edukemy.com\/blog\/wp-json\/wp\/v2\/users\/17"}],"replies":[{"embeddable":true,"href":"https:\/\/edukemy.com\/blog\/wp-json\/wp\/v2\/comments?post=9365"}],"version-history":[{"count":5,"href":"https:\/\/edukemy.com\/blog\/wp-json\/wp\/v2\/posts\/9365\/revisions"}],"predecessor-version":[{"id":20166,"href":"https:\/\/edukemy.com\/blog\/wp-json\/wp\/v2\/posts\/9365\/revisions\/20166"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/edukemy.com\/blog\/wp-json\/wp\/v2\/media\/10201"}],"wp:attachment":[{"href":"https:\/\/edukemy.com\/blog\/wp-json\/wp\/v2\/media?parent=9365"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/edukemy.com\/blog\/wp-json\/wp\/v2\/categories?post=9365"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/edukemy.com\/blog\/wp-json\/wp\/v2\/tags?post=9365"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}