Daily hospital respiratory admissions and winter air mass types, Birmingham, UK

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Abstract
A synoptic climatological approach is used to investigate linkages between air mass types (weather situations), the daily mean particulate matter with a size of 10 µm or less (PM10) concentrations and all respiratory hospital admissions for the Birmingham area, UK. Study results show distinct differential responses of respiratory admission rates to the six winter air mass types identified. Two of the three air masses associated with above average admission rates (continental anticyclonic gloom and continental anticyclonic fine and cold) also favour high PM10 levels. This association is suggestive of a possible linkage between weather, air quality and health. The remaining admissions-sensitive air mass type (cool moist maritime) does not favour high PM10 levels. This is considered to be indicative of a direct weather-health relationship. A sensitising mechanism is proposed to account for the linkages between air mass type, PM10 concentrations and respiratory response.

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