Scientists discuss geospace and what we could learn if we put some more eyes on this region in the atmosphere. Read more in our special themed issue.
Middle atmosphere: composition and chemistry
Posted inEditors' Highlights
Global Warming Intensifies Turbulence Over Northern Eurasia
A significant increasing trend of turbulence in upper atmosphere over northern Eurasia is attributed to intense anthropogenic activities.
Posted inEditors' Highlights
Measurements of Ozone-Depleting Chemicals in the Asian Monsoon
New high-altitude aircraft observations identify unexpected high levels of halogen-containing species entering the stratosphere above the summertime Asian monsoon.
![Two plots showing percent changes in TIME-GCM zonally averaged [O+] and [H+] as a function of latitude and altitude in the Northern Hemisphere between the “disturbed” and “pre-disturbance” time periods in 2012–2013](https://i0.wp.com/newspack-dev.eos.org/wp-content/uploads/2020/12/2020JA028331-Figure-12-top-row-with-legend-sized-for-Eos.png?resize=820%2C615&ssl=1)
Posted inEditors' Highlights
Stratospheric Weather Impacts Light Species at Great Heights
Sudden stratospheric warmings in the high latitude wintertime can drive changes in light species (H, He and O) all the way though the thermosphere, likely influencing ion densities in the exosphere.
Posted inResearch Spotlights
An Extraordinary Winter in the Polar North
An exceptionally strong stratospheric polar vortex coincided with a record-breaking Arctic Oscillation pattern and ozone destruction during the 2019–2020 winter season.
Posted inResearch Spotlights
Modeling Gravity Waves with Machine Learning
Researchers used neural networks to better define the parameterizations necessary for modeling the distribution and characteristics of orographic gravity waves.
Posted inEditors' Highlights
Satellite Measurements of Stratospheric Forest Fire Smoke
Intense boreal forest fires in August 2017 caused smoke plumes that reached record levels in the stratosphere; satellite measurements show that the effects rivaled a moderate volcanic eruption.
Posted inNews
Banned CFC Emissions Tracked to Eastern China
A new study indicates that better atmospheric monitoring networks are needed to enforce the Montreal Protocol.
Posted inResearch Spotlights
Satellite Observations Validate Stratosphere Temperature Models
Since the 1970s, the stratosphere has cooled as ozone levels dropped and carbon dioxide levels increased. Chemical models of the temperature decline conflicted with satellite observations—until now.
Posted inFeatures
How Sudden Stratospheric Warming Affects the Whole Atmosphere
High above Earth’s surface, air temperatures occasionally increase suddenly, producing widespread effects on weather, air chemistry, and telecommunications.