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  2. Atmospheric circulation - Wikipedia

    en.wikipedia.org/wiki/Atmospheric_circulation

    The atmospheric circulation pattern that George Hadley described was an attempt to explain the trade winds. The Hadley cell is a closed circulation loop which begins at the equator. There, moist air is warmed by the Earth's surface, decreases in density and rises.

  3. General circulation model - Wikipedia

    en.wikipedia.org/wiki/General_circulation_model

    A general circulation model (GCM) is a type of climate model. It employs a mathematical model of the general circulation of a planetary atmosphere or ocean. It uses the Navier–Stokes equations on a rotating sphere with thermodynamic terms for various energy sources ( radiation , latent heat ).

  4. Hadley cell - Wikipedia

    en.wikipedia.org/wiki/Hadley_cell

    The Hadley cell, also known as the Hadley circulation, is a global-scale tropical atmospheric circulation that features air rising near the equator, flowing poleward near the tropopause at a height of 12–15 km (7.5–9.3 mi) above the Earth's surface, cooling and descending in the subtropics at around 25 degrees latitude, and then returning ...

  5. Troposphere - Wikipedia

    en.wikipedia.org/wiki/Troposphere

    The three-cell model of the atmosphere of the Earth describes the actual flow of the atmosphere with the tropical-latitude Hadley cell, the mid-latitude Ferrel cell, and the polar cell to describe the flow of energy and the circulation of the planetary atmosphere. Balance is the fundamental principle of the model — that the solar energy ...

  6. Walker circulation - Wikipedia

    en.wikipedia.org/wiki/Walker_circulation

    The Walker circulation, also known as the Walker cell, is a conceptual model of the air flow in the tropics in the lower atmosphere (troposphere). According to this model, parcels of air follow a closed circulation in the zonal and vertical directions. This circulation, which is roughly consistent with observations, is caused by differences in ...

  7. Template:Cell biology - Wikipedia

    en.wikipedia.org/wiki/Template:Cell_biology

    Setting a value for any of the cell or organelle attributes will make its diagram visible Any number and combination of diagram attributes may be set When multiple diagrams are activated, the title is suppressed

  8. Biological system - Wikipedia

    en.wikipedia.org/wiki/Biological_system

    On the organ and tissue scale in mammals and other animals, examples include the circulatory system, the respiratory system, and the nervous system. On the micro to the nanoscopic scale, examples of biological systems are cells , organelles , macromolecular complexes and regulatory pathways.

  9. Cellular model - Wikipedia

    en.wikipedia.org/wiki/Cellular_model

    A better representation which can handle the large number of variables and parameters is called a bifurcation diagram (bifurcation theory): the presence of these special steady-state points at certain values of a parameter (e.g. mass) is represented by a point and once the parameter passes a certain value, a qualitative change occurs, called a ...