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  2. Planetary boundaries - Wikipedia

    en.wikipedia.org/wiki/Planetary_boundaries

    The Planetary Boundaries framework contributes to an understanding of global sustainability because it brings a planetary scale and a long timeframe into focus. [ 7 ] The framework described nine "planetary life support systems" essential for maintaining a "desired Holocene state", and attempted to quantify how far seven of these systems had ...

  3. 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 ...

  4. Convective planetary boundary layer - Wikipedia

    en.wikipedia.org/wiki/Convective_planetary...

    The convective planetary boundary layer (CPBL), also known as the daytime planetary boundary layer (or simply convective boundary layer, CBL, when in context), is the part of the lower troposphere most directly affected by solar heating of the Earth's surface.

  5. Numerical model of the Solar System - Wikipedia

    en.wikipedia.org/wiki/Numerical_model_of_the...

    In essence this mathematical simulation of the Solar System is a form of the N-body problem. The symbol N represents the number of bodies, which can grow quite large if one includes the Sun, 8 planets, dozens of moons, and countless planetoids, comets and so forth. However the influence of the Sun on any other body is so large, and the ...

  6. The Limits to Growth - Wikipedia

    en.wikipedia.org/wiki/The_Limits_to_Growth

    This improved parameter set results in a World3 simulation that shows the same overshoot and collapse mode in the coming decade as the original business-as-usual scenario of the Limits to Growth standard run. The main effect of the recalibration update is to raise the peaks of most variables and move them a few years into the future.

  7. 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

  8. Jet Propulsion Laboratory Development Ephemeris - Wikipedia

    en.wikipedia.org/wiki/Jet_Propulsion_Laboratory...

    JPL uses the ephemerides for navigation of spacecraft throughout the Solar System. Typically, a new ephemeris is computed including the latest available observations of the target planet(s), either for planning of the mission(s), or for final contact of the spacecraft with the target. See below, Recent ephemerides in the series.

  9. Alpine planetary boundary layer - Wikipedia

    en.wikipedia.org/wiki/Alpine_planetary_boundary...

    The alpine planetary boundary layer is the planetary boundary layer (PBL) associated with mountainous regions. Due to its high spatial and temporal variability, its behavior is more complex than over a flat terrain.