Downwell

Some of the northward-flowing waters turn eastward and enter the Throughflow sponge above 1300 m (Figure 5b), where they downwell and return to the interior and spread both to the south and the north (Figure 5c).

Ozone in the upper troposphere which downwells to the surface can also result from photochemical production enhanced by high levels of NOx from the natural stratosphere, aircraft emissions of NOx in the upper troposphere [Liu et al., 1980],

This cold water downwells and flows below the saltier but warmer surface water.

This measurement, as Region 4 stated, has been "commonly used to measure marine turbidity; it does not measure downwelling ambient light."

There is a practical depth limit from which the radiance is reflected. Gordon & McCluny (1975) call the depth at which the spectral radiance downwelled from the surface falls to 1/e of its initial energy 'the first optical attenuation length'.

For those animals living in the mesopelagic zone, where some light downwells from the surface, a visual predator looking up at them could see a silhouette.

In other words, the signal always weakens while it downwells.

The proposed work includes enlarging the basin and installing downwells for percolation.