Negative pressure is a rare and challenging-to-detect phenomenon in physics. Using liquid-filled optical fibers and sound waves, researchers at the Max Planck Institute for the Science of Light (MPL) in Erlangen have now ...
Optics & Photonics
Sep 25, 2023
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With its crushing atmospheric pressure, clouds of sulfuric acid, and searing surface temperature, Venus is an especially challenging place to study. But scientists know that observing its surface can provide key insights ...
Planetary Sciences
Sep 19, 2023
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When NASA astronauts return to the surface of the moon in the Artemis III mission, the plan is to use a modified SpaceX Starship as their lunar lander. NASA announced last week that SpaceX has now demonstrated an important ...
Space Exploration
Sep 18, 2023
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In work published in Science Advances, a team of researchers have determined a new pressure scale, which is critical for understanding the Earth's composition.
Earth Sciences
Sep 11, 2023
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A deep learning method developed by RIKEN researchers can accurately predict the destructive power of typhoon-induced storm surges on coastal regions in a fraction of the time of conventional models. It promises to buy precious ...
Earth Sciences
Aug 30, 2023
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A patch of ocean in the North Atlantic is stubbornly cooling while much of the planet warms. This anomaly—dubbed the "cold blob"—has been linked to changes in ocean circulation, but a new study found changes in large-scale ...
Earth Sciences
Aug 1, 2023
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The world recorded its hottest ever week two weeks ago. At the same time, the UN's weather agency declared a global El Niño.
Environment
Jul 18, 2023
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Icy planets, such as Uranus (U) and Neptune (N), are found in both our solar system and other solar systems across the universe. Nonetheless, these planets, characterized by a thick atmosphere and a mantle made of volatile ...
NASA recently used its powerful High Resolution Imaging Experiment (HiRISE) camera onboard the Mars Reconnaissance Orbiter to take a breathtaking image of a dust devil traversing Syria Planum on Mars. One unique aspect of ...
Planetary Sciences
Jun 30, 2023
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1
It has almost been 20 years since the establishment of the field of two-dimensional (2D) materials with the discovery of unique properties of graphene, a single, atomically thin layer of graphite. The significance of graphene ...
Atmospheric pressure is sometimes defined as the force per unit area exerted against a surface by the weight of air above that surface at any given point in the Earth's atmosphere. In most circumstances atmospheric pressure is closely approximated by the hydrostatic pressure caused by the weight of air above the measurement point. Low pressure areas have less atmospheric mass above their location, whereas high pressure areas have more atmospheric mass above their location. Similarly, as elevation increases there is less overlying atmospheric mass, so that pressure decreases with increasing elevation. A column of air one square inch in cross-section, measured from sea level to the top of the atmosphere, would weigh approximately 65.5 newtons (14.7 lbf). The weight of a 1 m2 (11 sq ft) column of air would be about 101 kN (10.3 tf).
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