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Atmospheric Dynamics

All articles tagged with #atmospheric dynamics

Webb Spots Dramatic Day-Night Atmosphere Split on WASP-121 b
astronomy24 days ago

Webb Spots Dramatic Day-Night Atmosphere Split on WASP-121 b

JWST transit observations of WASP-121 b reveal a clear day–night atmospheric split: the evening terminator is hotter and expands more, absorbing more starlight, likely driven by eastward winds; CO signals rise with temperature, while water is depleted at the upper atmosphere, hinting at clouds cooling the morning side. By tracking the planet's rotation during transit, researchers map atmospheric conditions by longitude and aim to study more ultra-hot Jupiters with this method.

via SciTechDaily|
#astronomy#atmospheric-dynamics#exoplanets
Hot Jupiters Harbor Jovian-Strength Magnetic Fields, Study Finds
science1 month ago

Hot Jupiters Harbor Jovian-Strength Magnetic Fields, Study Finds

High-resolution transit spectroscopy of seven ultrahot Jupiters with MAROON-X and ESPRESSO measured planetary Fe I line Doppler shifts to infer wind speeds, revealing faster wind decay with higher equilibrium temperatures consistent with magnetic drag. From this trend, the study estimates magnetic field strengths for hot giant exoplanets of at most a few gauss, comparable to Jupiter’s field, supporting magnetic effects in atmospheric circulation and providing benchmarks for magnetic-field scaling laws across exoplanets.

via Nature|
#atmospheric-dynamics#exoplanets#magnetic-field
Jupiter's Mysterious Dark Spots Linked to Magnetic Tornadoes
science1 year ago

Jupiter's Mysterious Dark Spots Linked to Magnetic Tornadoes

Scientists have observed large dark ovals on Jupiter's poles in ultraviolet light, believed to be caused by 'magnetic tornadoes' stirring up stratospheric haze. These ovals, first seen in the 1990s, absorb more UV light and suggest strong atmospheric forces at play. The research, published in Nature Astronomy, highlights the importance of understanding atmospheric dynamics across different planets, offering insights into Earth's climate systems.

via Futurism|
#astronomy#atmospheric-dynamics#hubble-space-telescope
New Study Challenges Optimistic Claims of Ozone Hole Recovery
environment2 years ago

New Study Challenges Optimistic Claims of Ozone Hole Recovery

A new study published in Nature Communications challenges the widely accepted belief that the ozone layer is recovering. The study suggests that the ozone hole above Antarctica may not be shrinking as expected and may even be expanding. The researchers found that ozone levels have decreased by 26% since 2004 at the core of the hole during the Antarctic spring. They attribute this depletion to changes in the Antarctic polar vortex, although they did not explore the specific causes. Some scientists are skeptical of the study's findings, pointing to other factors such as smoke from wildfires and volcanic eruptions, as well as the influence of the El Niño Southern Oscillation.

via Yahoo! Voices|
#antarctic-ozone-hole#atmospheric-dynamics#environment
Unveiling the Truth: The Ozone Hole's Recovery Questioned
environment2 years ago

Unveiling the Truth: The Ozone Hole's Recovery Questioned

A new study published in Nature Communications challenges the widely accepted belief that the ozone layer is recovering. The study suggests that the ozone hole above Antarctica may not be shrinking as expected and may even be expanding. The researchers found that ozone levels have reduced by 26% since 2004 at the core of the hole during Antarctic spring. They attribute this to changes in the Antarctic polar vortex, although other factors such as planet-warming pollution and volcanic eruptions could also contribute. Some scientists are skeptical of the study's findings, citing exceptional events and a short period of analysis.

via CNN|
#antarctic-ozone-hole#atmospheric-dynamics#environment
"James Webb Space Telescope Reveals Powerful Jet Stream on Jupiter"
science-and-astronomy2 years ago

"James Webb Space Telescope Reveals Powerful Jet Stream on Jupiter"

NASA's James Webb Space Telescope has discovered a high-speed jet stream over Jupiter's equator, measuring more than 3,000 miles wide and traveling at about 320 mph. This finding, observed using the telescope's Near-Infrared Camera, provides new insights into Jupiter's turbulent atmosphere and may help researchers understand the planet's extreme weather patterns. By comparing the data with previous observations from the Hubble Space Telescope, scientists hope to gain a clearer understanding of the wind speeds and atmospheric dynamics on Jupiter.

via Space.com|
#atmospheric-dynamics#james-webb-space-telescope#jet-stream
JWST discovers intense equatorial jet in Jupiter's lower stratosphere
astronomy2 years ago

JWST discovers intense equatorial jet in Jupiter's lower stratosphere

The James Webb Space Telescope (JWST) has observed an intense and narrow equatorial jet in Jupiter's lower stratosphere. The observations reveal a distinct central jet at the equator, similar to Saturn's equatorial jet, but with a stronger vertical wind shear. The jet increases in altitude up to the tropopause and is located in a region of elevated hazes above the main cloud deck. The findings highlight the similarities and differences in the equatorial dynamics of Jupiter and Saturn and provide new insights into the atmospheric dynamics of gas giants.

via Nature.com|
#astronomy#atmospheric-dynamics#equatorial-jet
Perseverance Rover Films Massive 1.2-Mile-High Dust Devil on Mars
space2 years ago

Perseverance Rover Films Massive 1.2-Mile-High Dust Devil on Mars

NASA's Perseverance rover captured images of a dust devil while exploring the Jezero Crater on Mars. The dust devil, spotted at Thorofare Ridge, measured about 60 meters in diameter and was estimated to be 1.2 miles high. Dust devils are common on Mars and play a role in moving and redistributing dust. The rover routinely monitors the atmosphere for these phenomena to study Mars' atmospheric dynamics.

via ScienceAlert|
#atmospheric-dynamics#dust-devil#jezero-crater
Unexplained Oxygen Anomaly Baffles Scientists on Callisto
space-science2 years ago

Unexplained Oxygen Anomaly Baffles Scientists on Callisto

A recent study published in The Journal of Geophysical Research: Planets has revealed that Jupiter's moon, Callisto, has a higher concentration of molecular oxygen in its atmosphere than previously believed. This discovery challenges previous assumptions and raises new questions about the moon's atmospheric dynamics, defying its reputation as a "dead body" in our celestial neighborhood.

via Interesting Engineering|
#atmospheric-dynamics#callisto#jupiters-moon
Unraveling Saturn's Enigmatic 100-Year Megastorms
space-science2 years ago

Unraveling Saturn's Enigmatic 100-Year Megastorms

Scientists studying Saturn's mega storms have found evidence that fallout from these storms can last for centuries, challenging current theories of planetary formation. Radio emissions from Saturn's atmosphere revealed that the storms cause ammonia vapor to condense into "ammonia-rich mushballs" that rain down into the planet's depths, affecting its inner atmosphere. The storms, which resemble giant hurricanes, are different from their terrestrial counterparts as they form without the energy supply from a warm surface. The researchers also discovered that Saturn's atmospheric dynamics are substantially different from Jupiter's, with the bands on Saturn being dominated by the giant storms rather than temperature differences. The findings suggest a need to revise current theories of planetary formation.

via The Register|
#ammonia#atmospheric-dynamics#mega-storms