I know that black layer is due to compaction and lack of oxygen in the rootzone, but what type of equipment will be best to alleviate the problem in a bowling green?

You are right that black layer — so called because of its dark colour — is due to anaerobic conditions in the soil. The problem is often accompanied by a vile smell, sometimes like rotten eggs, and is almost certainly a sign that stagnation is occurring in the rootzone. These are not the conditions in which roots want to grow. Problems above ground will soon become apparent due to shallow rooting.
Compaction — common on well played surfaces — has the effect of reducing the pore spaces to such an extent that soil-air supply is restricted, drainage is reduced and root growth is physically impeded. A solution is to break up the compaction, so allowing water trapped above it to drain out of the larger pores and be replaced by air. Aerating the green will literally give the roots room to breathe.
Bowling greens, because of their size and limited access, demand the use of pedestrian equipment. Although there is a lot of aeration equipment on the market, you really need to aerate as deep as possible and preferably 100mm or deeper. Sisis of Macclesfield is one company to offer machinery ideal for bowling-green aeration. The company’s vertical-action Dart will take a range of tines, including solid, pencil, hollow, chisel and flute, so there should be something to suit — whatever the time of year.
With recurring problems accompanied by standing water at the surface, it may also be appropriate to investigate existing drainage systems or look at the  possibility of installing a system to
remove excess water.
After aeration you may consider investigating the use of microbial treatments in order to put the “good bugs” back into the soil system.

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