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Comparison of temperature-mortality associations using observed weather station and reanalysis data in 52 Spanish
Dominic Royé1, Carmen Íñiguez2, Aurelio Tobías3
1Department of Geography, University of Santiago de Compostela, Santiago de Compostela, Spain; Spanish Consortium for Research on Epidemiology and Public Health (CIBERESP), Spain.
Background:
Most studies use temperature observation data from weather stations near the analyzed region or city as the reference point for the exposure-response association. Climatic reanalysis data sets have already been used for climate studies, but are not yet used routinely in environmental epidemiology.
Methods:
We compared the mortality-temperature association using weather station temperature and ERA-5 reanalysis data for the 52 provincial capital cities in Spain, using time-series regression with distributed lag non-linear models.
Results:
The shape of temperature distribution is very close between the weather station and ERA-5 reanalysis data (correlation from 0.90 to 0.99). The overall cumulative exposure-response curves are very similar in their shape and risks estimates for cold and heat effects, although risk estimates for ERA-5 were slightly lower than for weather station temperature.
Conclusions:
Reanalysis data allow the estimation of the health effects of temperature, even in areas located far from weather stations or without any available.
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