We are independent & ad-supported. We may earn a commission for purchases made through our links.
Advertiser Disclosure
Our website is an independent, advertising-supported platform. We provide our content free of charge to our readers, and to keep it that way, we rely on revenue generated through advertisements and affiliate partnerships. This means that when you click on certain links on our site and make a purchase, we may earn a commission. Learn more.
How We Make Money
We sustain our operations through affiliate commissions and advertising. If you click on an affiliate link and make a purchase, we may receive a commission from the merchant at no additional cost to you. We also display advertisements on our website, which help generate revenue to support our work and keep our content free for readers. Our editorial team operates independently of our advertising and affiliate partnerships to ensure that our content remains unbiased and focused on providing you with the best information and recommendations based on thorough research and honest evaluations. To remain transparent, we’ve provided a list of our current affiliate partners here.

What is Surface Pressure?

Marjorie McAtee
By
Updated Jun 04, 2024
Our promise to you
All Things Nature is dedicated to creating trustworthy, high-quality content that always prioritizes transparency, integrity, and inclusivity above all else. Our ensure that our content creation and review process includes rigorous fact-checking, evidence-based, and continual updates to ensure accuracy and reliability.

Our Promise to you

Founded in 2002, our company has been a trusted resource for readers seeking informative and engaging content. Our dedication to quality remains unwavering—and will never change. We follow a strict editorial policy, ensuring that our content is authored by highly qualified professionals and edited by subject matter experts. This guarantees that everything we publish is objective, accurate, and trustworthy.

Over the years, we've refined our approach to cover a wide range of topics, providing readers with reliable and practical advice to enhance their knowledge and skills. That's why millions of readers turn to us each year. Join us in celebrating the joy of learning, guided by standards you can trust.

Editorial Standards

At All Things Nature, we are committed to creating content that you can trust. Our editorial process is designed to ensure that every piece of content we publish is accurate, reliable, and informative.

Our team of experienced writers and editors follows a strict set of guidelines to ensure the highest quality content. We conduct thorough research, fact-check all information, and rely on credible sources to back up our claims. Our content is reviewed by subject-matter experts to ensure accuracy and clarity.

We believe in transparency and maintain editorial independence from our advertisers. Our team does not receive direct compensation from advertisers, allowing us to create unbiased content that prioritizes your interests.

Surface pressure, also known as atmospheric pressure, is the pressure that the air exerts on the surface of the Earth. Air has mass, and the effects of gravity on that mass cause air pressure. Air pressure differs by geographical region and by season. Changes in air pressure, throughout the year and over different parts of the Earth, are largely responsible for changes in weather. Atmospheric pressure is typically measured with a barometer, and it is most often measured in units called Pascals (Pa).

As a whole, the atmosphere of the Earth exerts pressure on the surface of the Earth equal to 100,000 Pascals or 100 kilopascals (kPa). This number represents the average surface pressure of the atmosphere on the Earth. In reality, surface pressure can vary widely over different geographical areas. Variances in air pressure depend largely on the seasons of the year, and they are considered responsible for most weather phenomenon.

From the months of December to February, areas of of high atmospheric pressure typically exist over Northern Africa and Spain, in the Pacific Ocean off the Californian coast, over central Asia, over central North America, and over subtropical ocean waters in the Southern Hemisphere. The southernmost regions of Greenland and the Aleutian Islands can usually be expected to experience low surface pressure during these months of the year.

From the months of June through August, these pressure systems typically change. The high pressure systems over central Asia, as well as the low pressure systems over Greenland and the Aleutian Islands, generally vanish. The high pressure systems of the Pacific Ocean, Spain, North Africa, and subtropical Southern Hemisphere waters, generally grow stronger and extend to the north. High pressure systems tend to appear over Antarctica and Australia during these months, while central and southwest Asia develop the low surface pressure said to contribute to that continent's rainy season.

Weather usually occurs when air moves from an area of high surface pressure to an area of low surface pressure. The movement of air is commonly known as wind, and it typically moves in spiral-shaped patterns caused by the Earth's rotation. Air subjected to higher levels of surface pressure is usually more dense than air subjected to low levels of surface pressure; this difference in density normally contributes to the movement of air from high to low pressure areas. Air generally becomes less dense as it moves into areas of low atmospheric pressure. This change in air density often contributes to the development of atmospheric depressions, which are characterized by clouds and precipitation.

All Things Nature is dedicated to providing accurate and trustworthy information. We carefully select reputable sources and employ a rigorous fact-checking process to maintain the highest standards. To learn more about our commitment to accuracy, read our editorial process.
Marjorie McAtee
By Marjorie McAtee
Marjorie McAtee, a talented writer and editor with over 15 years of experience, brings her diverse background and education to everything she writes. With degrees in relevant fields, she crafts compelling content that informs, engages, and inspires readers across various platforms. Her ability to understand and connect with audiences makes her a skilled member of any content creation team.
Discussion Comments
By anon1004278 — On Jan 04, 2021

Please note that the average surface atmospheric pressure for the Earth is 101.325 kilopascals. Pressure of 1 atmosphere does NOT equal 100,000 Pascals

Marjorie McAtee
Marjorie McAtee
Marjorie McAtee, a talented writer and editor with over 15 years of experience, brings her diverse background and education to everything she writes. With degrees in relevant fields, she crafts compelling content that informs, engages, and inspires readers across various platforms. Her ability to understand and connect with audiences makes her a skilled member of any content creation team.
All Things Nature, in your inbox

Our latest articles, guides, and more, delivered daily.

All Things Nature, in your inbox

Our latest articles, guides, and more, delivered daily.