'Planetary boundary' is a correct term and can be used in written English.
For example, scientists have suggested a planetary boundary which must not be exceeded in order to avoid runaway climate change.
The region above the planetary boundary layer is commonly known as the free atmosphere.
The small clouds just above the PBL are known as planetary boundary layer clouds.
What seemed to be a non-negotiable planetary boundary will be subject to (more or less publicly visible) renegotiation.
Within the planetary boundary layer, in situ instrumentation includes towers, tethered balloons, and surface data collection platforms.
As a result of surface friction, winds in the planetary boundary layer are usually weaker than above and tend to blow toward areas of low pressure.
Such clouds, with their bubbly turreted shapes, exhibit the small-scale up-and-down behaviour of air in the turbulent planetary boundary layer.
"It's not as if we can keep doing business as usual until we hit a planetary boundary, and all hell will break loose," he said.
Dr. Running calls plant productivity a new "planetary boundary," a concept set forth in a much-discussed paper published in 2009 in the journal Nature.
Setting such a planetary guard rail is critical, even though our scientific planetary boundary for climate change is set at 1.5C, showing that even 2C – a political "boundary" – is a risky threshold for humanity.
The fast-moving air begins at the planetary boundary layer, about two and a half times the height of the largest surface obstruction around, he said, so if there are 80-foot trees, it would begin at roughly 200 feet.
