Tropical Cyclones: Determinants of Pattern and Structure in New Zealand's Indigenous Forests

Abstract

Tropical cyclones usually form between 10° and 20° latitude but frequently move as far south as New Zealand. Cyclone Bernie, in April 1982, caused extensive damage in central North Island forests. Four other severe tropical cyclone s since 1936, are known to have caused damage to indigenous forests throughout the North Island and in parts of the South Island. Severe storms of extratropical origin also affect New Zealand, and many also result in significant forest damage. The storm regime to which New Zealand is subject is severe enough so that storms themselves could be a major factor in molding stand composition and structure in many, or even most , parts of the country.