The role of weather and climate in human health and activity, Christchurch, New Zealand

Abstract

A randomised telephone survey and the diaries of weather sensitive individuals were analysed to look at the influence of the Nor'Wester in Christchurch. Negative symptomatology was described in conjunction with the Nor'Wester. Residents were more at risk of suffering 'Föhn Illness' if they were female, older, unhealthy or on medication or a long-time resident of Christchurch (any combination of these factors increased the risk further). Independent data sets on suicide, attempted suicide, crime, traffic accidents and psychiatric admissions were compared with meteorological parameters. The suicides and suicide attempts formed two distinct groups in the way in which they related to the weather and climate. Psychiatric admissions showed marked variation from year to year. Admissions for mania were strongly linked with fluctuations in the SOI, fewer admissions for depression were highly correlated with low summer rainfall. Crime was inversely correlated with rainfall and also demonstrated a very close relationship to the monthly sunshine total. Traffic accidents were inversely correlated with sunshine and temperature and exhibited strong cyclical (seasonal and annual) behaviour. Weather anomalies are discussed and suggestions are made for further research.