The contraction of the Hadley cells at the SGM explains the southward displacement (weakening) of the monsoons associated with the Hadley circulation (figure 54 f), and the decrease in wind strength at the Santa Barbara basin that increases precipitation (figure 54 e). The expansion of the polar cells explains the increase in wind strength over Iceland (figure 52 d), that appears to depend on Milankovitch forcing. With the expansion of the polar cells there is an increase in polar circulation driven by the strengthening of the Siberian high, that produces an increase in salt deposition over Greenland (figure 52 a & b).
Attack defines how long it takes to reach maximum compression once a signal exceeds the threshold. The Attack knob’s values are in milliseconds. Release sets how long it takes for the compressor to return to normal operation after the signal falls below the threshold. The Release knob’s values are in seconds. When Release is set to A (Auto), the release time will adjust automatically based on the incoming audio. The Glue Compressor’s Auto Release actually uses two times - a slow one as a base compression value, and a fast one to react to transients in the signal. Auto Release may be too slow to react to sudden changes in level, but generally is a useful way to tame a wide range of material in a gentle way.