Temperature gradient ( $\nabla T$ )

The temperature gradient is the gradient

\nabla T

of the temperature field. It points in the direction of fastest temperature increase.

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- Ion temperature gradient Temperature gradient

Ion temperature gradient ( $L_{T_{i}}^{- 1} = - d ln T_{i} / d x$ )

Spatial variation of the ion temperature. The inverse logarithmic scale in the title is positive for an outward-decreasing profile. A nonzero value is a possible free energy source; it does not by itself establish ion-temperature-gradient instability without the appropriate dynamics and threshold.

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Temperature gradient by

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The temperature gradient is a measure of how temperature changes with distance in a specific direction. It is essentially the rate at which temperature increases or decreases over a certain distance. The concept is important in various fields, including meteorology, geology, and engineering, as it can affect processes such as heat transfer, weather patterns, and geological phenomena.

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