Autor(es):
Caeiro, E. 
; Nunes, C. ; Brandao, R.M. ; Lopes, M.L. ; Gaspar, A. ; Mario Morais-Almeida
Data: 2011
Identificador Persistente: http://hdl.handle.net/10174/4284
Origem: Repositório Científico da Universidade de Évora
Assunto(s): aerobiology; pollen; portugal; grasses; outdoor environment
Descrição
657 Grasses Pollen Concentrations In The Atmosphere Of
Portugal
E. Caeiro1, C. Nunes2, R. Brandao3, L. Lopes3, A. Gaspar4, M. Almeida4;
1University of Evora, Portimao, PORTUGAL, 2Center of Allergy of Algarve,
Portimao, PORTUGAL, 3University of Evora, Evora, PORTUGAL,
4CUF Descobertas, Lisboa, PORTUGAL.
RATIONALE: To compare the main pollination season (MPS) of Poaceae
pollen from different monitoring stations of the Portuguese Aerobiology
Network (RPA): Oporto (north), Coimbra and Lisbon (center), Evora
and Portim~ao (south); 2) to analyse the interannual and diurnal variations
of Poaceae pollen concentrations in the atmosphere of each station.
METHODS: Airborne pollen was collected with Hirst-type samplers,
most of them on rooftops or meteorological platforms, 15-20 m above
ground floor. In this study, daily and hourly sampling data of Poaceae pollen
from five monitoring stations over the last seven years (2002-2008)
were used.
RESULTS: There are differences between years. Daily average concentrations
above 25 pollen grains/m3 were recorded in Oporto during 23 6 5
days, 16 6 8 days in Coimbra, in Lisbon during 34 6 15 days, in Evora
54 6 9 days and in Portim~ao 39 6 12 days. Poaceae pollen was recorded
in the atmosphere during 24 hours, with the lowest values recorded between
22h and 6h and the highest values observed in Evora between 7h
and 21h, where more than 30 pollen grains /m3 were recorded.
CONCLUSIONS: Between the stations there were differences, in terms of
quantity and other features by the different environmental conditions. The
risk of exposure to this pollen is higher in the southern inland areas and rural
areas.
