Quick Links
Quick Links
UPSC Exams
Latest Update
Coaching
UPSC Current Affairs
Syllabus
UPSC Notes
Previous Year Papers
UPSC Mains Previous Year Question Papers Last 25 Years UPSC Prelims Question Papers Last 10 Years UPSC Question Papers UPSC CSE Prelims 2025 Question Paper UPSC Mains 2024 Model Answers UPSC 2024 Question Papers UPSC 2023 Question Papers UPSC 2022 Question Papers UPSC 2021 Question Papers UPSC 2020 Question Papers UPSC 2019 Question Papers UPSC 2018 Question Papers UPSC 2017 Question Papers UPSC 2016 Question Papers UPSC 2015 Question Papers UPSC 2014 Question Papers UPSC CSAT Question Papers UPSC IFS Previous Year Paper UPSC Assistant Labour Commissioner Previous Question Year Papers UPSC Combined Geo Scientist Previous Year Paper UPSC APFC Previous Year Question Papers UPSC CMS Previous Year Question Paper UPSC EPFO Previous Year Paper UPSC Air Safety Officer Previous Year Papers UPSC SO Steno Previous Year Paper UPSC IES ISS Previous Year Question Papers
Mock Tests
UPSC Editorial
Bilateral Ties
Albania India Relations India Algeria Relations Andorra India Relations India Angola Relations India Antigua Barbuda Relations India Argentina Relations Austria India Relations India Azerbaijan Relations Bahamas India Relations India Bahrain Relations Barbados India Relations India Belarus Relations Belgium India Relations Belize India Relations Benin India Relations Bolivia India Relations India Bosnia Herzegovina Relations India Botswana Relations Brazil India Relations Brunei India Relations Bulgaria India Relations Burundi India Relations Cabo Verde India Relations India Cambodia Relations India Cameroon Relations Canada India Relations India Cayman Islands Relations India Central African Republic Relations India Chad Relations Chile India Relations India Colombia Relations India Comoros Relations India Democratic Republic Of The Congo Relations India Republic Of The Congo Relations India Cook Islands Relations India Costa Rica Relations India Ivory Coast Relations India Croatia Relations India Cyprus Relations India Czech Republic Relations India Djibouti Relations India Dominica Relations India Dominican Republic Relations India Ecuador Relations India El Salvador Relations India Equatorial Guinea Relations India Eritrea Relations Estonia India Relations India Ethiopia Relations India Fiji Relations India Finland Relations India Gabon Relations India Gambia Relations India Georgia Relations Germany India Relations India Ghana Relations India Greece Relations India Grenada Relations India Guatemala Relations India Guinea Relations India Guinea Bissau Relations India Guyana Relations India Haiti Relations India Holy See Relations India Honduras Relations India Hong Kong Relations India Hungary Relations India Iceland Relations India Indonesia Relations India Iran Relations India Iraq Relations India Ireland Relations India Jamaica Relations India Kazakhstan Relations India Kenya Relations India Kingdom Of Eswatini Relations India Kiribati Relations India Kuwait Relations India Kyrgyzstan Relations India Laos Relations Latvia India Relations India Lebanon Relations India Lesotho Relations India Liberia Relations Libya India Relations Liechtenstein India Relations India Lithuania Relations India Luxembourg Relations India Macao Relations Madagascar India Relations India Malawi Relations India Mali Relations India Malta Relations India Marshall Islands Relations India Mauritania Relations India Micronesia Relations India Moldova Relations Monaco India Relations India Montenegro Relations India Montserrat Relations India Morocco Relations Mozambique India Relations India Namibia Relations India Nauru Relations Netherlands India Relations India Nicaragua Relations India Niger Relations India Nigeria Relations India Niue Relations India North Macedonia Relations Norway India Relations India Palau Relations India Panama Relations India Papua New Guinea Relations India Paraguay Relations Peru India Relations India Philippines Relations Qatar India Relations India Romania Relations Rwanda India Relations India Saint Kitts And Nevis Relations India Saint Lucia Relations India Saint Vincent And Grenadines Relations India Samoa Relations India Sao Tome And Principe Relations Saudi Arabia India Relations India Senegal Relations Serbia India Relations India Sierra Leone Relations India Singapore Relations India Slovak Republic Relations India Slovenia Relations India Solomon Islands Relations Somalia India Relations India South Sudan Relations India Spain Relations India Sudan Relations Suriname India Relations India Sweden Relations India Syria Relations India Tajikistan Relations Tanzania India Relations India Togo Relations India Tonga Islands Relations India Trinidad And Tobago Relations India Tunisia Relations India Turkmenistan Relations India Turks And Caicos Islands Relations India Tuvalu Relations India Uganda Relations India Ukraine Relations India Uae Relations India Uruguay Relations India Uzbekistan Relations India Vanuatu Relations India Venezuela Relations India British Virgin Islands Relations Yemen India Relations India Zambia Relations India Zimbabwe Relations
Books
Government Schemes
Production Linked Incentive Scheme Integrated Processing Development Scheme Rodtep Scheme Amended Technology Upgradation Fund Scheme Saathi Scheme Uday Scheme Hriday Scheme Samagra Shiksha Scheme India Nishta Scheme Stand Up India Scheme Sahakar Mitra Scheme Mdms Mid Day Meal Scheme Integrated Child Protection Scheme Vatsalya Scheme Operation Green Scheme Nai Roshni Scheme Nutrient Based Subsidy Scheme Kalia Scheme Ayushman Sahakar Scheme Nirvik Scheme Fame India Scheme Kusum Scheme Pm Svanidhi Scheme Pmvvy Scheme Pm Aasha Scheme Pradhan Mantri Mahila Shakti Kendra Scheme Pradhan Mantri Lpg Panjayat Scheme Mplads Scheme Svamitva Scheme Pat Scheme Udan Scheme Ek Bharat Shresth Bharat Scheme National Pension Scheme Ujala Scheme Operation Greens Scheme Gold Monetisation Scheme Family Planning Insurance Scheme Target Olympic Podium Scheme
Topics
NASA Space Missions
NASA Mercury-Redstone 3 (Freedom 7) Mission NASA Mercury-Redstone 4 (Liberty Bell 7) Mission NASA Mercury-Atlas 6 (Friendship 7) Mission NASA Mercury-Atlas 7 (Aurora 7) Mission NASA Mercury-Atlas 8 (Sigma 7) Mission NASA Mercury-Atlas 9 (Faith 7) Mission NASA Gemini 3 Mission NASA Gemini 4 Mission NASA Gemini 5 Mission NASA Gemini 7 Mission NASA Gemini 8 Mission NASA Gemini 9 Mission NASA Gemini 10 Mission NASA Gemini 11 Mission NASA Gemini 12 Mission NASA Apollo 1 (AS‑204) Mission NASA Apollo 7 Mission NASA Apollo 8 Mission NASA Apollo 9 Mission NASA Apollo 10 Mission NASA Apollo 11 Mission NASA Apollo 12 Mission NASA Apollo 13 Mission NASA Apollo 14 Mission NASA Apollo 15 Mission NASA Apollo 16 Mission NASA Apollo 17 Mission NASA Skylab Orbital Workshop Mission NASA Skylab 2 Mission NASA Skylab 3 Mission NASA Skylab 4 Mission NASA Apollo–Soyuz Test Project Mission NASA STS‑1 Columbia Mission NASA STS‑3 Columbia Mission NASA STS‑7 Challenger Mission NASA STS‑8 Challenger Mission NASA STS‑41B Challenger Mission NASA STS‑41G Discovery (1st female EVA) Mission NASA STS‑51L Challenger (accident) Mission NASA STS‑26 Discovery (Return‑to‑Flight) Mission NASA STS‑31 Discovery (Hubble Launch) Mission NASA STS‑49 Endeavour (first capture EVA) Mission NASA STS‑61 Endeavour (Hubble Servicing 1) Mission NASA STS‑73 Columbia (microgravity) Mission NASA STS‑95 Discovery (John Glenn returns) Mission NASA STS‑107 Columbia (accident) Mission NASA STS‑114 Discovery (RTF‑2) Mission NASA STS‑120 Discovery (Node 2) Mission NASA STS‑125 Atlantis (Final Hubble Service) Mission NASA STS‑132 Atlantis Mission NASA STS‑135 Atlantis (Final Shuttle flight) Mission NASA Artemis I (Orion/ SLS‑1) Mission NASA Artemis II (Planned) Mission NASA Artemis III (Planned lunar landing) Mission NASA Mariner 4 Mission NASA Mariner 6 Mission NASA Mariner 7 Mission NASA Mariner 9 Mission NASA Viking 1 Orbiter/Lander Mission NASA Viking 2 Orbiter/Lander Mission NASA Mars Pathfinder & Sojourner Mission NASA Mars Global Surveyor Mission NASA 2001 Mars Odyssey Mission NASA Mars Exploration Rover – Spirit Mission NASA Mars Exploration Rover – Opportunity Mission NASA Mars Reconnaissance Orbiter Mission NASA Phoenix Mars Lander Mission NASA InSight Mars Lander Mission NASA Mars 2020 (Perseverance & Ingenuity) Mission NASA Mars Sample Return – SRL (planned) Mission NASA Pioneer 10 Mission NASA Pioneer 11 Mission NASA Voyager 1 Mission NASA Voyager 2 Mission NASA Galileo Jupiter Orbiter/Probe Mission NASA Cassini–Huygens Mission NASA New Horizons (Pluto & KBO) Mission NASA Juno Mission NASA Europa Clipper (planned) Mission NASA Parker Solar Probe Mission NASA Solar Orbiter (ESA/NASA) Mission NASA Surveyor 1 Mission NASA Lunar Orbiter 1 Mission NASA Lunar Prospector Mission NASA LCROSS Mission NASA LADEE Mission NASA Lunar Reconnaissance Orbiter (LRO) Mission NASA CAPSTONE Mission NASA VIPER Rover (planned) Mission NASA NEAR Shoemaker Mission NASA Deep Space 1 Mission NASA Stardust Mission NASA Genesis Mission NASA Deep Impact Mission NASA Dawn (Vesta/Ceres) Mission NASA OSIRIS‑REx Mission NASA Lucy Mission NASA DART Mission NASA Landsat‑1 (ERTS‑1) Mission NASA Landsat‑5 Mission NASA Landsat‑9 Mission NASA Terra Mission NASA Aqua Mission NASA Aura Mission NASA Suomi NPP Mission NASA Sentinel‑6 Michael Freilich Mission NASA ICESat‑2 Mission NASA GRACE‑FO Mission NASA SMAP Mission NASA GPM Core Observatory Mission NASA CALIPSO Mission NASA CloudSat Mission NASA NISAR (NASA‑ISRO) Mission NASA Explorer 1 Mission NASA COBE Mission NASA Compton Gamma Ray Observatory Mission NASA Hubble Space Telescope Mission NASA Chandra X‑ray Observatory Mission NASA Spitzer Space Telescope Mission NASA WISE Mission NASA Kepler Mission NASA TESS Mission NASA Fermi Gamma‑ray Space Telescope Mission NASA NICER Mission NASA IXPE Mission NASA Roman Space Telescope (planned) Mission NASA NuSTAR Mission NASA GALEX Mission NASA Swift Mission NASA SOHO (ESA/NASA) Mission NASA Cluster II (ESA/NASA) Mission NASA TIMED Mission NASA STEREO‑A/B Mission NASA MMS Mission NASA IRIS Mission NASA Solar Dynamics Observatory Mission NASA X‑37B OTV‑1 (USAF/NASA liaison) Mission NASA X‑59 QueSST Mission NASA Mars Helicopter Ingenuity Mission NASA Valkyrie R5 Robot Mission NASA Low‑Boom Flight Demo Mission NASA CRS‑1 Dragon Mission NASA CRS‑1 Cygnus Mission NASA Crew Dragon Demo‑2 Mission NASA Starliner OFT‑2 Mission NASA STS-2 (Shuttle flight) Mission NASA STS-4 (Shuttle flight) Mission NASA STS-5 (Shuttle flight) Mission NASA STS-6 (Shuttle flight) Mission NASA STS-41C (Shuttle flight) Mission NASA STS-41D (Shuttle flight) Mission NASA STS-51A (Shuttle flight) Mission NASA STS-61C (Shuttle flight) Mission NASA STS-26 (Shuttle flight) Mission NASA STS-27 (Shuttle flight) Mission NASA STS-29 (Shuttle flight) Mission NASA STS-30 (Shuttle flight) Mission NASA STS-32 (Shuttle flight) Mission NASA STS-34 (Shuttle flight) Mission NASA STS-38 (Shuttle flight) Mission NASA STS-45 (Shuttle flight) Mission NASA STS-60 (Shuttle flight) Mission NASA STS-70 (Shuttle flight) Mission NASA STS-71 (Shuttle flight) Mission NASA STS-73 (Shuttle flight) Mission NASA STS-88 (Shuttle flight) Mission NASA STS-92 (Shuttle flight) Mission NASA STS-97 (Shuttle flight) Mission NASA STS-99 (Shuttle flight) Mission NASA STS-100 (Shuttle flight) Mission NASA STS-104 (Shuttle flight) Mission NASA STS-106 (Shuttle flight) Mission NASA STS-110 (Shuttle flight) Mission NASA STS-112 (Shuttle flight) Mission NASA STS-115 (Shuttle flight) Mission NASA STS-116 (Shuttle flight) Mission NASA STS-117 (Shuttle flight) Mission NASA STS-118 (Shuttle flight) Mission NASA STS-120 (Shuttle flight) Mission NASA STS-122 (Shuttle flight) Mission NASA STS-123 (Shuttle flight) Mission NASA STS-126 (Shuttle flight) Mission NASA STS-130 (Shuttle flight) Mission NASA Vanguard 1 Mission NASA Transit 1B Mission NASA Echo 1 Mission NASA Telstar 1 Mission NASA Syncom 3 Mission NASA ATS‑6 Mission NASA Skynet Mission NASA Nimbus‑1 Mission NASA Nimbus‑7 Mission NASA ERS-1 Mission NASA SeaSat Mission NASA QuikSCAT Mission NASA Jason‑1 Mission NASA Jason‑3 Mission NASA ICESat Mission NASA Earth Observing‑1 Mission NASA Orbiting Carbon Observatory‑2 Mission NASA CYGNSS Mission NASA PACE Mission NASA TRMM Mission NASA Terrestrial Planet Finder (cxl) Mission NASA Laser Interferometer Space Antenna (LISA) Mission NASA Explorer 33 Mission NASA Voyager Interstellar Mission Mission NASA Helios‑A Mission NASA Helios‑B Mission NASA ISEE‑3 (ICE) Mission NASA ACE Mission NASA DSCOVR Mission NASA IBEX Mission NASA Solar Orbiter Heliospheric Imager Mission NASA SAGE‑III ISS Mission NASA SPACE Telescope Imaging Spectrograph Mission NASA ARIEL (ESA/NASA) Mission NASA OSAM‑1 (Restore‑L) Mission NASA Dragonfly (Titan rotorcraft) Mission NASA VERITAS (Venus orbiter) Mission NASA DAVINCI (Venus probe) Mission NASA SPHEREx Mission NASA MAGGIE (Mars Geophysical) Mission NASA CLPS – Peregrine Mission NASA CLPS – VIPER Delivery Mission NASA CAPSTONE Mission NASA Gateway (HALO / PPE) Mission NASA Mars Telecommunication Orbiter (cxl) Mission NASA Mars Polar Lander (MPL) Mission NASA Mars Climate Orbiter Mission NASA Pathfinder Mission Mission NASA SLS Block 1B (Exploration Upper Stage) Mission NASA Orion Crew Module Mission NASA Commercial LEO Destinations – Axiom Station Mission NASA ISS Expedition 1 Mission NASA ISS Expedition 70 Mission NASA CRS‑11 (Dragon) Mission NASA CRS‑21 (Dragon 2) Mission NASA Snoopy CubeSat Mission
Home / IAS Preparation / Atmospheric Pressure

Atmospheric Pressure: Causes, Variations, Pressure Belts & More | UPSC Notes

Last Updated on Feb 08, 2025
Also Read Atmospheric Pressure in Hindi
Download As PDF
IMPORTANT LINKS
Agriculture Notes For UPSC Public Administration UPSC Notes Modern History Books For UPSC Overseas Citizen Of India Caste System & Panchayati Raj Godavari River Federalism Indira Point New Development Bank Battle Of Sinhagad Sankalp And Strive Schemes Digital India High Yielding Varieties Economic Growth Development League Of Nations Ease Of Doing Business Mid Day Meal Scheme Wildlife Protection Act 1972 UPSC Notes International Union Conservation Nature

Atmospheric pressure is a fundamental concept in meteorology and the study of Earth's atmosphere. It refers to the force exerted by the weight of the air above a specific area. It plays a crucial role in weather patterns, air circulation, and climate dynamics. Understanding atmospheric pressure is essential for comprehending various atmospheric phenomena and predicting weather conditions.

Questions related to pressure systems, weather patterns, global circulation, and climate dynamics regularly appear in the UPSC Civil Services Examination. The topic atmospheric pressure UPSC is specifically relevant for the General Studies paper, particularly in the section covering Environmental Science, Climate Change, and Geography.

This article will cover key factors influencing atmospheric pressure, including altitude, temperature, air masses, rotation of the Earth, and solar heating.

Check the article on the Types of Rainfall – NCERT Notes for UPSC here!

GS Paper

General Studies Paper I

Topics for UPSC Prelims

Atmospheric Pressure, High and Low-Pressure Systems, Barometer, Pressure Gradients, Weather Patterns, Influence on Climate, Cyclones

Topics for UPSC Mains

Role of High and Low-Pressure Systems in Weather Formation, Pressure Gradients and Their Effects on Wind Patterns, Impact on Cyclone and Anticyclone Development, Influence on Climate and Weather Variability

What is Atmospheric Pressure?

Atmospheric pressure is also known as barometric pressure. It is expressed as the force per unit area exerted by an atmospheric column. Atmospheric column is defined as the air above the per unit area of the surface. And there is change in the atmospheric column with an increase in height or altitude. Because of this pressure is maximum at sea level and minimum at the end of the troposphere. Every second we are surrounded by atmospheric pressure like the air we inhale has weight. The device which measures atmospheric pressure is called a barometer. The reading of barometric pressure is done either in centimeters or inches and the pressure in the barometer is determined by the movement of the mercury column. One of the major causes of change in atmospheric pressure is air motion i.e., wind which moves from high pressure area to low pressure area.

Causes of Atmospheric Pressure

The atmospheric pressure is primarily caused by the weight of the air above a given location and is influenced by several factors. Here are the key causes of atmospheric pressure:

  • Gravity: The force of gravity pulls the Earth's atmosphere towards its center, resulting in the weight of the air exerting pressure on the surface below. The higher the column of air above a location, the greater the atmospheric pressure.
  • Altitude: Atmospheric pressure decreases with increasing altitude. As one moves higher in the atmosphere, there are fewer air molecules above, leading to lower atmospheric pressure. This is because the weight of the air decreases with altitude.

  • Temperature: Temperature variations affect atmospheric pressure. Warmer air tends to expand and become less dense, leading to lower pressure. Conversely, cooler air contracts and becomes denser, resulting in higher pressure.
  • Air Masses: Differences in temperature and moisture content between air masses contribute to variations in atmospheric pressure. When warm air rises and forms a low-pressure area, surrounding air flows towards it, causing a drop in pressure. Conversely, when cool air sinks and forms a high-pressure area, surrounding air diverges and results in increased pressure.
  • Rotation of the Earth: The rotation of the Earth induces the Coriolis effect, which influences wind patterns. The Coriolis effect causes air to deflect from its original path, creating areas of low and high pressure.
  • Solar Heating: Unequal heating of the Earth's surface by the Sun leads to variations in temperature. This, in turn, affects atmospheric pressure. The equatorial regions receive more direct sunlight, resulting in warmer air and lower pressure. The polar regions receive less sunlight and have cooler air, leading to higher pressure.

Read the article on Heating and Cooling of the Atmosphere!

FREEMentorship Program by
Ravi Kapoor, Ex-IRS
UPSC Exam-Hacker, Author, Super Mentor, MA
100+ Success Stories
Key Highlights
Achieve your Goal with our mentorship program, offering regular guidance and effective exam strategies.
Cultivate a focused mindset for exam success through our mentorship program.
2 Lakh+ Students Mentored Get
Get Free Mentorship Now
UPSC Beginners Program

Get UPSC Beginners Program SuperCoaching @ just

₹50000

Claim for free
Want to know more about this pass ?
Explore SuperCoaching

Vertical Variation of Atmospheric Pressure

In the lower atmosphere there is a decrease in pressure rapidly with height. For example: at the Mt. Everest, the pressure of air is two-thirds less than what it is at sea level. The level of decrease in pressure with altitude is not the same everywhere. Since there are changes in factors like temperature, amount of water vapour, gravity which control air density. Because of this variability in different factors, there is no simple relationship between altitude and pressure. Decrease in atmospheric pressure is seen on an average at the rate of about 34 millibars every 300 metres of height.

Gradient force of vertical pressure is much larger than that of gradient force of horizontal pressure. But is balanced by approximately equal but opposite gravitational force. Because of this strong upward wind is not experienced. Because of the presence of gravity air is denser at the surface and has high pressure. As pressure is inversely proportional to density and temperature. So, change in either temperature or density will lead to change in pressure. Increasing pressure indicates fine, settled weather whereas decreasing pressure indicates unstable and cloudy weather.

Check the article on the Types of Clouds: Geography NCERT Notes for UPSC here

Horizontal Variation of Atmospheric Pressure

Minute difference in pressure is also considered very important in terms of direction of winds and velocity. Distribution of pressure horizontally is studied by drawing isobars at a constant level. Line which connects places having equal pressure is called isobars. But for reducing the effect of altitude on pressure, it is measured at any station after being reduced to sea level for purposes of comparison.

Rate and direction of pressure changes which is called as pressure gradient is expressed by spacing present in isobar. By this we can define pressure gradient as the decrease in pressure per unit distance in the direction in which the pressure decreases most rapidly. There are several distinct identifiable zones of homogeneous horizontal pressure regimes or ‘pressure belts’. There are seven pressure belts on the Earth surface, they are:

  • equatorial low,
  • the subtropical highs,
  • the subpolar lows, and
  • the polar highs.

Also study the topic: Forces Affecting Velocity And Direction Of Wind!

Pressure Belts of the Earth

Pressure belts of the Earth refer to zones or bands of atmospheric pressure that encircle the planet. These pressure belts are created by the unequal heating of the Earth's surface by the Sun, which leads to variations in air density and pressure. The main pressure belts are the Equatorial Low Pressure Belt (also known as the Intertropical Convergence Zone or ITCZ), the Subtropical High Pressure Belts (North and South), the Subpolar Low Pressure Belts, and the Polar High Pressure Belts. These pressure belts play a crucial role in shaping global wind patterns and weather systems.

Equatorial Low Pressure Belt or ‘Doldrums’

This belt lies between 10°N and 10°S latitudes. The width of this pressure belt may vary between 5°N and 5°S and 20°N and 20°S. This belt is known as Doldrums because of the extremely calm air movements. There is variation in the position of this belt based on the movement of the Sun.

Subtropical High Pressure Belt or Horse Latitudes

The height of this belt extends from near the tropics to about 35°N and S. In this belt subsiding air is warm and dry and that’s why most of the deserts are present along this belt, in both hemispheres.

Sub-Polar Low Pressure Belt

This belt is located between 45°N and S latitudes along with the Arctic and the Antarctic circles (66.5° N and S latitudes). As temperature is low in these latitudes the sub polar low pressure belts are not very well pronounced year long. In the southern hemisphere such belts surround the periphery of Antarctica and are not as well differentiated.

Polar High Pressure Belt

This belt is small in areas and extends around the poles. This belt is situated around poles between 80 – 90° N and S latitudes. In this belt the lowest temperature is found over the poles.

Key Takeaways for UPSC Aspirants

  • Definition: The force exerted by the weight of air above a given point on Earth's surface.
  • Measurement: Measured by a barometer, units are millibars (mb) or inches of mercury (inHg).
  • Sea Level Pressure: Standard atmospheric pressure at sea level is 1013.25 mb.
  • Altitude Effect: Atmospheric pressure decreases as altitude increases because there is less air above the measurement point.
  • Weather Patterns: In general, high pressure means fine and still weather, while low pressure is associated with cloudiness and rain.
  • Pressure Systems: Anticyclones, otherwise known as high pressure systems, and cyclones, otherwise known as low-pressure systems, are of the main elements in meteorology.
  • Isobars: Lines appearing on a weather map joining all places of equal pressure; close spacing indicates a strong wind, and wide spacing, a light breeze.
  • Pressure Belts: The Earth has a number of major pressure belts, including the equatorial low-pressure belt and the subtropical high-pressure belts, that determine global climate and weather patterns.

Testbook is constantly on the top rank among e-learning platforms. As we give the best quality products like live tests, mocks, Content pages,GK and current affairs videos and much more. Quality which we provide is really helpful in making your preparation journey a successful story.

Download the Testbook App to get the best quality product for different competitive exams specially government exams.

More Articles for IAS Preparation

Atmospheric Pressure UPSC FAQs

Atmospheric pressure can be expressed in bar by dividing the pressure value in pascals by 100,000, as 1 bar is equal to 100,000 pascals.

1 atmospheric pressure, or 1 atm, is approximately equal to 101.3 kilopascals (kPa) or 1,013 millibars (mbar).

Atmospheric pressure refers to the force exerted by the weight of the Earth's atmosphere on a given area.

Atmospheric pressure is measured by an instrument called a barometer.

Yes, 1 atm (atmosphere) is a unit commonly used to represent average atmospheric pressure value at sea level.

Atmospheric pressure at sea level is approximately 101.3 kilopascals (kPa) or 1,013 millibars (mbar).

The unit of atmospheric pressure is often expressed in pascals (Pa), but other common units include kilopascals (kPa) and millibars (mbar).
Report An Error
Exams Tests Super Practice