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  2. Planetary boundaries - Wikipedia

    en.wikipedia.org/wiki/Planetary_boundaries

    The basic idea of the Planetary Boundaries framework is that maintaining the observed resilience of the Earth system in the Holocene is a precondition for humanity's pursuit of long-term social and economic development. [9] The Planetary Boundaries framework contributes to an understanding of global sustainability because it brings a planetary ...

  3. Breaking Boundaries - Wikipedia

    en.wikipedia.org/wiki/Breaking_Boundaries

    Breaking Boundaries tells the story how humans are pushing Earth beyond the boundaries that have kept the planet stable for 10,000 years, following scientific journey of Rockström and his team's discovery of the nine planetary boundaries. [1]

  4. Doughnut (economic model) - Wikipedia

    en.wikipedia.org/wiki/Doughnut_(economic_model)

    The Doughnut, or Doughnut economics, is a visual framework for sustainable development – shaped like a doughnut or lifebelt – combining the concept of planetary boundaries with the complementary concept of social boundaries. [1] The name derives from the shape of the diagram, i.e. a disc with a hole in the middle.

  5. Humanity Has Overstepped Six of the Earth’s Nine Planetary ...

    www.aol.com/humanity-overstepped-six-earth-nine...

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  6. Doughnut Economics: Seven Ways to Think Like a 21st-Century ...

    en.wikipedia.org/wiki/Doughnut_Economics:_Seven...

    The Doughnut is an attempt to provide such a compass. The inner ring sets out 12 social foundations for humanity identified as sustainable development goals; the outer ring is formed of 9 planetary boundaries that earth system scientists have identified as being necessary for planetary

  7. Planet Nine - Wikipedia

    en.wikipedia.org/wiki/Planet_Nine

    Planet Nine is a hypothetical ninth planet in the outer region of the Solar System. [4] [2] Its gravitational effects could explain the peculiar clustering of orbits for a group of extreme trans-Neptunian objects (ETNOs), bodies beyond Neptune that orbit the Sun at distances averaging more than 250 times that of the Earth i.e. over 250 astronomical units (AU).

  8. Planetary boundary layer - Wikipedia

    en.wikipedia.org/wiki/Planetary_boundary_layer

    A convective planetary boundary layer is a type of planetary boundary layer where positive buoyancy flux at the surface creates a thermal instability and thus generates additional or even major turbulence. (This is also known as having CAPE or convective available potential energy; see atmospheric convection.) A convective boundary layer is ...

  9. Atmosphere of Earth - Wikipedia

    en.wikipedia.org/wiki/Atmosphere_of_Earth

    The planetary boundary layer is the part of the troposphere that is closest to Earth's surface and is directly affected by it, mainly through turbulent diffusion. During the day the planetary boundary layer usually is well-mixed, whereas at night it becomes stably stratified with weak or intermittent mixing.