1. In winter when the sun is low or absent, primary production at the ocean surface is minimal.

2. The Brocken spectre is a magnified shadow of an observer, typically surrounded by rainbow-like bands, thrown on to a bank of cloud in high mountain areas when the sun is low.

3. Brocken spectre, also called anticorona, glory, Brocken bow, or mountain spectre, the apparently enormously magnified shadow that an observer casts, when the Sun is low, upon the upper surfaces of clouds that are below the mountain upon which the observer stands