Retreat of glaciers since 1850 doing so due to transient local weather conditions, which have brought more precipitation and cloudier, cooler summers since 2002. Tropical glaciers are located between the Tropic of Cancer and the Tropic of Capricorn, in the region that lies 23° 26′ 22″ north or south of the equator. Strictly, a tropical glacier is located within the astronomical tropics; the area where the annual temperature variation is less than the daily variation, and is within the oscillation area of the Intertropical Convergence Zone. Tropical glaciers are the most uncommon of all glaciers for a variety of reasons. Firstly, the regions are the
Capricorn and Bunker Group Additional to these are several reef structures separate from the individual island but still part of the Capricorn Group of islands including A tourist Resort and Marine Scientific Research Station have been established on Heron Island. A manned lighthouse operates at North Island and the Australian Museum conducts a field research station on One Tree Island. The Bunker Group consists of five coral cays: In association with During Captain James Cook's first voyage of discovery he sailed well inside the island group between 21 and 25 May 1770, typically 2 to 5 miles offshore. He then made his second landing