It corresponds to the vertical component of the spatial gradient of temperature. Diffusion is driven by a gradient in concentration. The exchange of gases occurs as a result of diffusion down a concentration gradient. The winds also have a strong vertical gradient. Palettes made of a continuous color gradient from darkest to lightest arbitrary hues. If a zone undergoes a strong, vertical chemistry gradient with depth, it contains a chemocline. The climatic condition varies along with the elevation gradient. Magnets are drawn along the magnetic field gradient. The Blend tool can be used to fill a selection with a color gradient. A tailwind increases takeoff distance required and decreases the climb gradient. Thermotaxis is movement along a gradient of temperature. Each gradient direction applied measures the movement along the direction of that gradient. A thermometer is a device that measures temperature or a temperature gradient. Frontogenesis is the process of creating or steepening the temperature gradient of a front. As the loss is convex the optimum solution lies at gradient zero.