{"id":21558,"date":"2024-01-10T12:35:23","date_gmt":"2024-01-10T12:35:23","guid":{"rendered":"https:\/\/edukemy.com\/blog\/?p=21558"},"modified":"2026-09-21T15:13:40","modified_gmt":"2026-09-21T15:13:40","slug":"what-is-geostrophic-wind-explain-the-relationship-between-barometric-slope-and-air-circulation-upsc-geography-optional-mains-2023","status":"publish","type":"post","link":"https:\/\/edukemy.com\/blog\/what-is-geostrophic-wind-explain-the-relationship-between-barometric-slope-and-air-circulation-upsc-geography-optional-mains-2023\/","title":{"rendered":"Geostrophic Wind &#038; Barometric Slope: UPSC Geography Optional Solved Answer (2023)"},"content":{"rendered":"<p>\n<figure class=\"wp-block-image size-large\"><a href=\"https:\/\/edukemy.com\/upsc\/upsc-prelims-support-program-with-test-series?type=classroom\" target=\"_blank\" rel=\"noreferrer noopener\"><img fetchpriority=\"high\" decoding=\"async\" width=\"1024\" height=\"300\" src=\"https:\/\/edukemy.com\/blog\/wp-content\/uploads\/2024\/10\/GS-Foundation-Course-for-UPSC-1280-x-300-px-1-1024x300.png\" alt=\"\" class=\"wp-image-46623\"\/><\/a><\/figure>\n<\/p>\r\n<p><\/p>\r\n<div id=\"ez-toc-container\" class=\"ez-toc-v2_0_85 counter-hierarchy ez-toc-counter ez-toc-grey ez-toc-container-direction\">\n<label for=\"ez-toc-cssicon-toggle-item-6abb52ede7c3c\" 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-6abb52ede7c3c\"  \/><nav><ul class='ez-toc-list ez-toc-list-level-1 ' ><li class='ez-toc-page-1 ez-toc-heading-level-1'><a class=\"ez-toc-link ez-toc-heading-1\" href=\"https:\/\/edukemy.com\/blog\/what-is-geostrophic-wind-explain-the-relationship-between-barometric-slope-and-air-circulation-upsc-geography-optional-mains-2023\/#Geostrophic_wind_is_a_theoretical_un-frictioned_wind_that_blows_parallel_to_straight_isobars_in_the_upper_atmosphere_above_500%E2%80%931000m_It_forms_when_the_Pressure_Gradient_Force_PGF_generated_by_a_barometric_slope_rate_of_pressure_change_over_distance_reaches_an_exact_balance_with_the_deflecting_Coriolis_Force\" >Geostrophic wind is a theoretical, un-frictioned wind that blows parallel to straight isobars in the upper atmosphere (above 500\u20131000m). It forms when the Pressure Gradient Force (PGF), generated by a barometric slope (rate of pressure change over distance), reaches an exact balance with the deflecting Coriolis Force.<\/a><ul class='ez-toc-list-level-2' ><li class='ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-2\" href=\"https:\/\/edukemy.com\/blog\/what-is-geostrophic-wind-explain-the-relationship-between-barometric-slope-and-air-circulation-upsc-geography-optional-mains-2023\/#What_is_Geostrophic_Wind\" >What is Geostrophic Wind?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"https:\/\/edukemy.com\/blog\/what-is-geostrophic-wind-explain-the-relationship-between-barometric-slope-and-air-circulation-upsc-geography-optional-mains-2023\/#Relationship_Between_Barometric_Slope_and_Air_Circulation\" >Relationship Between Barometric Slope and Air Circulation<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-4\" href=\"https:\/\/edukemy.com\/blog\/what-is-geostrophic-wind-explain-the-relationship-between-barometric-slope-and-air-circulation-upsc-geography-optional-mains-2023\/#1_Gradient_Steepness_Controls_Wind_Velocity\" >1. Gradient Steepness Controls Wind Velocity<\/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\/what-is-geostrophic-wind-explain-the-relationship-between-barometric-slope-and-air-circulation-upsc-geography-optional-mains-2023\/#2_Friction-Dependent_Air_Trajectories\" >2. Friction-Dependent Air Trajectories<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-6\" href=\"https:\/\/edukemy.com\/blog\/what-is-geostrophic-wind-explain-the-relationship-between-barometric-slope-and-air-circulation-upsc-geography-optional-mains-2023\/#3_Curvature_Effects_Gradient_Winds\" >3. Curvature Effects: Gradient Winds<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-7\" href=\"https:\/\/edukemy.com\/blog\/what-is-geostrophic-wind-explain-the-relationship-between-barometric-slope-and-air-circulation-upsc-geography-optional-mains-2023\/#Climate_Change_Impact_on_Barometric_Slopes\" >Climate Change Impact on Barometric Slopes<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-8\" href=\"https:\/\/edukemy.com\/blog\/what-is-geostrophic-wind-explain-the-relationship-between-barometric-slope-and-air-circulation-upsc-geography-optional-mains-2023\/#Frequently_Asked_Questions_FAQ\" >Frequently Asked Questions (FAQ)<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-9\" href=\"https:\/\/edukemy.com\/blog\/what-is-geostrophic-wind-explain-the-relationship-between-barometric-slope-and-air-circulation-upsc-geography-optional-mains-2023\/#What_is_the_difference_between_geostrophic_wind_and_gradient_wind\" >What is the difference between geostrophic wind and gradient wind?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-10\" href=\"https:\/\/edukemy.com\/blog\/what-is-geostrophic-wind-explain-the-relationship-between-barometric-slope-and-air-circulation-upsc-geography-optional-mains-2023\/#Why_is_geostrophic_wind_absent_at_the_Equator\" >Why is geostrophic wind absent at the Equator?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-11\" href=\"https:\/\/edukemy.com\/blog\/what-is-geostrophic-wind-explain-the-relationship-between-barometric-slope-and-air-circulation-upsc-geography-optional-mains-2023\/#At_what_altitude_does_geostrophic_balance_occur\" >At what altitude does geostrophic balance occur?<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-12\" href=\"https:\/\/edukemy.com\/blog\/what-is-geostrophic-wind-explain-the-relationship-between-barometric-slope-and-air-circulation-upsc-geography-optional-mains-2023\/#In_case_you_still_have_your_doubts_contact_us_on_9773890604\" >In case you still have your doubts, contact us on 9773890604<\/a><ul class='ez-toc-list-level-4' ><li class='ez-toc-heading-level-4'><ul class='ez-toc-list-level-4' ><li class='ez-toc-heading-level-4'><a class=\"ez-toc-link ez-toc-heading-13\" href=\"https:\/\/edukemy.com\/blog\/what-is-geostrophic-wind-explain-the-relationship-between-barometric-slope-and-air-circulation-upsc-geography-optional-mains-2023\/#Visit_our_YouTube_Channel_%E2%80%93_here\" >Visit our YouTube Channel &#8211;\u00a0here<\/a><\/li><\/ul><\/li><\/ul><\/li><\/ul><\/li><\/ul><\/nav><\/div>\n<h1><span class=\"ez-toc-section\" id=\"Geostrophic_wind_is_a_theoretical_un-frictioned_wind_that_blows_parallel_to_straight_isobars_in_the_upper_atmosphere_above_500%E2%80%931000m_It_forms_when_the_Pressure_Gradient_Force_PGF_generated_by_a_barometric_slope_rate_of_pressure_change_over_distance_reaches_an_exact_balance_with_the_deflecting_Coriolis_Force\"><\/span><strong style=\"font-size: 14px; font-family: 'PT Serif', serif;\">Geostrophic wind<\/strong><span style=\"font-size: 14px; font-family: 'PT Serif', serif;\"> is a theoretical, un-frictioned wind that blows parallel to straight isobars in the upper atmosphere (above 500\u20131000m). It forms when the <\/span><strong style=\"font-size: 14px; font-family: 'PT Serif', serif;\">Pressure Gradient Force (PGF)<\/strong><span style=\"font-size: 14px; font-family: 'PT Serif', serif;\">, generated by a <\/span><strong style=\"font-size: 14px; font-family: 'PT Serif', serif;\">barometric slope<\/strong><span style=\"font-size: 14px; font-family: 'PT Serif', serif;\"> (rate of pressure change over distance), reaches an exact balance with the deflecting <\/span><strong style=\"font-size: 14px; font-family: 'PT Serif', serif;\">Coriolis Force<\/strong><span style=\"font-size: 14px; font-family: 'PT Serif', serif;\">.<\/span><span class=\"ez-toc-section-end\"><\/span><\/h1>\r\n<h2><span class=\"ez-toc-section\" id=\"What_is_Geostrophic_Wind\"><\/span><strong>What is Geostrophic Wind?<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\r\n<p>In climatology and meteorology, <strong>Geostrophic Wind<\/strong> represents a state of hydrostatic horizontal equilibrium in the upper atmosphere. When air moves at altitudes where surface friction is virtually zero, it is acted upon primarily by two opposing forces:<\/p>\r\n<ul>\r\n<li><strong>Pressure Gradient Force (PGF):<\/strong> Drives air perpendicular to isobars, from high pressure to low pressure.\u00a0<\/li>\r\n<li><strong>Coriolis Force ($CF$):<\/strong> An apparent force caused by Earth&#8217;s rotation that deflects moving air to the right in the Northern Hemisphere and to the left in the Southern Hemisphere.<\/li>\r\n<\/ul>\r\n<p><img decoding=\"async\" class=\"alignnone size-full wp-image-51096 lazyload\" data-src=\"https:\/\/edukemy.com\/blog\/wp-content\/uploads\/2024\/01\/tmp_2f96baea-e26c-42f2-8760-1404fc463725.png\" alt=\"\" width=\"1060\" height=\"1086\" data-srcset=\"https:\/\/edukemy.com\/blog\/wp-content\/uploads\/2024\/01\/tmp_2f96baea-e26c-42f2-8760-1404fc463725.png 1060w, https:\/\/edukemy.com\/blog\/wp-content\/uploads\/2024\/01\/tmp_2f96baea-e26c-42f2-8760-1404fc463725-585x599.png 585w\" data-sizes=\"(max-width: 1060px) 100vw, 1060px\" src=\"data:image\/gif;base64,R0lGODlhAQABAAAAACH5BAEKAAEALAAAAAABAAEAAAICTAEAOw==\" style=\"--smush-placeholder-width: 1060px; --smush-placeholder-aspect-ratio: 1060\/1086;\" \/><\/p>\r\n<h2><span class=\"ez-toc-section\" id=\"Relationship_Between_Barometric_Slope_and_Air_Circulation\"><\/span><strong>Relationship Between Barometric Slope and Air Circulation<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\r\n<p>The term <strong>barometric slope<\/strong> refers to the spatial gradient of atmospheric pressure across horizontal distances. The steepness of this slope directly regulates the dynamics, speed, and patterns of atmospheric air circulation.<\/p>\r\n<pre><code>Steep Barometric Slope (Closely Spaced Isobars)<br \/>\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u2502<br \/>\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u25bc<br \/>Strong Pressure Gradient Force (PGF)<br \/>\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u2502<br \/>\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u25bc<br \/>Rapid Air Acceleration &amp; High Velocity<br \/>\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u2502<br \/>\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u25bc<br \/>Proportionally Stronger Coriolis Force Deflection<br \/>\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u2502<br \/>\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u25bc<br \/>Equilibrium Reached Parallel to Isobars (Geostrophic Balance)<\/code><\/pre>\r\n<h3><span class=\"ez-toc-section\" id=\"1_Gradient_Steepness_Controls_Wind_Velocity\"><\/span>1. <strong>Gradient Steepness Controls Wind Velocity<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\r\n<ul>\r\n<li><strong>Steep Barometric Slope:<\/strong> Indicates closely spaced isobars and rapid pressure changes over short distances. This produces a powerful PGF, generating high-velocity winds (e.g., Jet Streams, Rossby Waves).\u00a0<\/li>\r\n<li><strong>Gentle Barometric Slope:<\/strong> Indicates widely spaced isobars, weak PGF, and low wind speeds.\u00a0<\/li>\r\n<\/ul>\r\n<h3><span class=\"ez-toc-section\" id=\"2_Friction-Dependent_Air_Trajectories\"><\/span>2. <strong>Friction-Dependent Air Trajectories<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\r\n<div class=\"pcrstb-wrap\"><table>\r\n<thead>\r\n<tr>\r\n<th><strong>Characteristic<\/strong><\/th>\r\n<th><strong>Upper Troposphere (Free Atmosphere)<\/strong><\/th>\r\n<th><strong>Planetary Boundary Layer (Surface)<\/strong><\/th>\r\n<\/tr>\r\n<\/thead>\r\n<tbody>\r\n<tr>\r\n<td><strong>Primary Forces<\/strong><\/td>\r\n<td>$text{PGF} + text{Coriolis Force}$<\/td>\r\n<td>$text{PGF} + text{Coriolis Force} + text{Friction}$<\/td>\r\n<\/tr>\r\n<tr>\r\n<td><strong>Friction Level<\/strong><\/td>\r\n<td>Negligible ($sim 0$)<\/td>\r\n<td>High (Terrain, vegetation, water friction)<\/td>\r\n<\/tr>\r\n<tr>\r\n<td><strong>Flow Direction<\/strong><\/td>\r\n<td>Parallel to isobars ($90^circ$ deflection from PGF)<\/td>\r\n<td>Crosses isobars at an acute angle ($10^circ text{&#8211;} 45^circ$)<\/td>\r\n<\/tr>\r\n<tr>\r\n<td><strong>Resulting Winds<\/strong><\/td>\r\n<td>Upper Tropospheric Westerlies, Jet Streams<\/td>\r\n<td>Surface trade winds, local land\/sea breezes<\/td>\r\n<\/tr>\r\n<\/tbody>\r\n<\/table><\/div>\r\n<h3><span class=\"ez-toc-section\" id=\"3_Curvature_Effects_Gradient_Winds\"><\/span>3. <strong>Curvature Effects: Gradient Winds<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\r\n<p>When isobars are curved around high- or low-pressure centers, centripetal force alters the geostrophic balance, giving rise to <strong>gradient winds<\/strong>:<\/p>\r\n<ul>\r\n<li><strong>Subgeostrophic Flow (Cyclones \/ Low Pressure):<\/strong> Centripetal force acts in the same direction as PGF, opposing the Coriolis force. Wind speeds are <strong>lower<\/strong> than purely geostrophic calculations.\u00a0<\/li>\r\n<li><strong>Supergeostrophic Flow (Anticyclones \/ High Pressure):<\/strong> Centripetal force acts in the direction of the Coriolis force, countering PGF. Wind speeds are <strong>higher<\/strong> than purely geostrophic calculations.\u00a0<\/li>\r\n<\/ul>\r\n<h2><span class=\"ez-toc-section\" id=\"Climate_Change_Impact_on_Barometric_Slopes\"><\/span><strong>Climate Change Impact on Barometric Slopes<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\r\n<p>In recent decades, anthropogenic climate change has altered global barometric slopes through <strong>Arctic Amplification<\/strong>:<\/p>\r\n<ol>\r\n<li>Rapid warming in polar regions reduces the temperature differential between the equator and the poles.\u00a0<\/li>\r\n<li>This weakens the poleward <strong>barometric slope<\/strong> in the upper troposphere.\u00a0<\/li>\r\n<li>As a result, the <strong>Polar Jet Stream<\/strong> slows down and meanders, leading to prolonged atmospheric blocking patterns such as <strong>Omega Blocks<\/strong>, <strong>Mid-Latitude Heatwaves in Europe<\/strong>, and <strong>Bomb Cyclones in North America<\/strong>.\u00a0<\/li>\r\n<\/ol>\r\n<h2><span class=\"ez-toc-section\" id=\"Frequently_Asked_Questions_FAQ\"><\/span><strong>Frequently Asked Questions (FAQ)<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\r\n<h3><span class=\"ez-toc-section\" id=\"What_is_the_difference_between_geostrophic_wind_and_gradient_wind\"><\/span><strong>What is the difference between geostrophic wind and gradient wind?<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\r\n<p>Geostrophic wind occurs along <strong>straight isobars<\/strong> where only PGF and Coriolis forces are balanced. Gradient wind occurs along <strong>curved isobars<\/strong> and incorporates a third force: <strong>centripetal force<\/strong>.<\/p>\r\n<h3><span class=\"ez-toc-section\" id=\"Why_is_geostrophic_wind_absent_at_the_Equator\"><\/span><strong>Why is geostrophic wind absent at the Equator?<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\r\n<p>At the equator ($phi = 0^circ$), the Coriolis force ($sin 0^circ = 0$) drops to zero. Without Coriolis deflection to balance the Pressure Gradient Force, geostrophic equilibrium cannot form.<\/p>\r\n<h3><span class=\"ez-toc-section\" id=\"At_what_altitude_does_geostrophic_balance_occur\"><\/span><strong>At what altitude does geostrophic balance occur?<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\r\n<p>Geostrophic balance typically occurs above the planetary boundary layer, generally at altitudes between <strong>500 meters and 1,000 meters<\/strong> above ground level and extending up into the upper troposphere.<\/p>\r\n<p>\r\n\r\n\n<figure class=\"wp-block-image size-full is-resized\"><a href=\"https:\/\/edukemy.com\/upsc\/upsc-essay?utm_source=Blog&amp;utm_medium=Banner&amp;utm_campaign=Essay\" target=\"_blank\" rel=\"noreferrer noopener\"><img decoding=\"async\" data-src=\"https:\/\/edukemy.com\/blog\/wp-content\/uploads\/2024\/06\/UPSC-Essay-Course-1280\u00d7300-1-3.svg\" alt=\"\" class=\"wp-image-42688 lazyload\" width=\"781\" height=\"182\" src=\"data:image\/gif;base64,R0lGODlhAQABAAAAACH5BAEKAAEALAAAAAABAAEAAAICTAEAOw==\" style=\"--smush-placeholder-width: 781px; --smush-placeholder-aspect-ratio: 781\/182;\" \/><\/a><\/figure>\n\r\n\r\n<\/p>\r\n<p>\r\n\r\n<\/p>\r\n<h2><span class=\"ez-toc-section\" id=\"In_case_you_still_have_your_doubts_contact_us_on_9773890604\"><\/span><strong>In case you still have your doubts, contact us on 9773890604<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\r\n<p>\r\n\r\n<\/p>\r\n<p>Enrol in Geography Optional by Shabbir Sir: <a href=\"https:\/\/edukemy.com\/upsc\/geography-optional-by-shabbir-sir-foundation-course\">Here<\/a><\/p>\r\n<p>Enrol in GS Mentorship Program: <a href=\"https:\/\/edukemy.com\/upsc\/gs-foundation-mentorship-program-led-by-shabbir-sir\">Here<\/a><\/p>\r\n<p>Enrol In GS Mains Mentorship Program<a href=\"https:\/\/edukemy.com\/upsc\/gs-mains-mentorship-program-led-by-shabbir-sir\">: Here<\/a><\/p>\r\n<p>Explore One Integrated Platform for UPSC Prep: <a 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12:29:06","updated":"2026-09-21 16:46:29","ai":{"faqs":[],"keyPoints":[],"schemas":[],"titles":[],"descriptions":[],"socialPosts":{"email":{"subject":"","preview":"","content":""},"linkedin":[],"twitter":[],"facebook":[],"instagram":[]}},"breadcrumb_settings":null,"seo_analyzer_scan_date":null},"aioseo_breadcrumb":"<div class=\"aioseo-breadcrumbs\"><span class=\"aioseo-breadcrumb\">\n\t\t\t<a href=\"https:\/\/edukemy.com\/blog\" title=\"Home\">Home<\/a>\n\t\t<\/span><span class=\"aioseo-breadcrumb-separator\">&raquo;<\/span><span class=\"aioseo-breadcrumb\">\n\t\t\t<a href=\"https:\/\/edukemy.com\/blog\/category\/upsc-geography-optional-mains-solved-paper-2023\/\" title=\"UPSC Geography Optional Mains Solved Paper 2023\">UPSC Geography Optional Mains Solved Paper 2023<\/a>\n\t\t<\/span><span class=\"aioseo-breadcrumb-separator\">&raquo;<\/span><span class=\"aioseo-breadcrumb\">\n\t\t\tGeostrophic Wind &amp; Barometric Slope: UPSC Geography Optional Solved Answer 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