1 hr ago
Rocket Growth Raises Concerns About Ozone Layer Protection
Rockets release pollution high in the atmosphere, close to the ozone layer.
This pollution can behave differently from pollution released near the ground.
Scientists studied what might happen if rocket launches become much more common.
Their model assumed ten times more soot from rockets than is emitted today.
It found that temperatures and air movement in the upper atmosphere could change.
It also found that ozone could decrease in parts of the Northern Hemisphere.
Ozone helps protect people, animals, plants, and oceans from harmful ultraviolet sunlight.
The article does not say current launches will destroy the ozone layer.
Instead, it says future space activity should grow while using cleaner fuels and carefully checking environmental effects.
A NOAA and Aerospace Corporation study modeled the atmospheric effects of sharply increased rocket launches.
The model examined annual stratospheric soot emissions rising tenfold, from about 1,000 to 10,000 metric tonnes.
Under that scenario, stratospheric temperatures rose by about 0.5 to 2°C and circulation patterns changed.
The model found ozone reductions north of roughly 30 degrees north latitude, with a maximum decline of about 4% at the North Pole in June.
Researchers and the article’s author call for environmental assessments of rocket fuels and consideration of cleaner propulsion systems.
- Who
- Scientists from the U.S. National Oceanic and Atmospheric Administration and The Aerospace Corporation, along with governments and space agencies considering future launches.
- What
- A warning that rapid growth in rocket launches, especially those using kerosene-based fuels, could affect stratospheric temperatures, circulation, and ozone concentrations.
- Where
- The potential effects occur in the stratosphere, including ozone reductions north of approximately 30 degrees north latitude.
- When
- The study was conducted a few years ago; the modeled scenario considered emissions continuing for five decades.
- Why
- To assess the atmospheric consequences of an expanding space economy and encourage more environmentally responsible rocket design and launch policies.
Space Expansion
Atmospheric Protection
Value of rocket and satellite activity
Space Expansion
More launches can support satellite deployment, commercial spaceflight, communications, agriculture, disaster management, climate science, and future Moon or Mars missions.
Atmospheric Protection
The benefits of space activity should not be measured only by launch numbers or distance traveled; its broader environmental footprint must also be considered.
Rocket fuel choices
Space Expansion
The expanding launch industry relies substantially on kerosene-fuelled rockets and seeks greater launch capacity, efficiency, and payload performance.
Atmospheric Protection
Fuel choice affects atmospheric chemistry, so rocket systems should be assessed for emissions and cleaner options, including hydrogen-fuelled designs.
Future regulation and responsibility
Space Expansion
Continued space development is presented as a legitimate human ambition, including commercial spaceflight, space tourism, and exploration beyond Earth.
Atmospheric Protection
Governments and space agencies should require systematic environmental assessments because atmospheric effects can cross national borders and affect the shared ozone layer.
Key facts
- Organizations involved
- U.S. National Oceanic and Atmospheric Administration and The Aerospace Corporation
- Modeled soot increase
- From approximately 1,000 to 10,000 metric tonnes entering the stratosphere annually
- Modeled duration
- Five decades
- Temperature change
- Approximately 0.5 to 2°C increase in annual stratospheric temperatures
- Jet-stream effect
- Subtropical jet streams slowed by as much as 3.5% in the model
- Maximum modeled ozone reduction
- About 4% at the North Pole in June
- Potentially affected area
- Regions north of about 30 degrees north latitude
Sources
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