Many are of an ephemeral nature, such as ring n, 1966,
a simple pile of sand, being remade for the exhibition, and Light on light on sacks, 1969, comprising a pile of hessian sacks illuminated by a beam of light.
An image
of El Ninos that intrigues me and I haven't seen it discussed in precisely these terms, though the idea seems pretty obvious and directly connects El Nino to 1 / f noise is this: [and, Atmoz, Eli, the following is just chit - chat and whether this makes any sense has NOTHING to do with the validity
of my criticisms
of Mann and the 1000 year proxies — so please don't read any further) one
of the
simple models
of 1 / f noise are sandpile avalanches under steady drips
of sand onto a
pile.