Title: Comparison of spatial rainfall data calculated with a meteorological model and from interpolation of measurements - implications for FRAME modelled wet deposition

Authors: Maciej Kryza; Anthony J. Dore; Małgorzata Werner; Kinga Wałaszek

Addresses: Department of Climatology and Atmosphere Protection, Wrocław University, ul. Kosiby 6/8 51-621 Wrocław, Poland ' Centre for Ecology and Hydrology, Bush Estate, Penicuik, Midlothian, EH26 0QB, UK ' Department of Climatology and Atmosphere Protection, Wrocław University, ul. Kosiby 6/8 51-621 Wrocław, Poland ' Department of Climatology and Atmosphere Protection, Wrocław University, ul. Kosiby 6/8 51-621 Wrocław, Poland

Abstract: This work quantifies the differences between the two sources of spatial information of precipitation on FRAME modelled wet deposition of oxidised sulphur (SOx), nitrogen (NOy) and reduced nitrogen (NHx) for two years in an area of Poland. The model was run twice, first with precipitation dataset calculated with the WRF model (pWRF). The second run was based on interpolation of measured precipitation with kriging (pOK). SOx, NOy and NHx wet deposition calculated with pWRF precipitation gives lower country mean values if compared with pOK. The maximum values are higher for pWRF precipitation. Grid to grid correlation between pOK and pWRF modelled wet deposition is similar for both years, with the lowest values for NHx and the highest for SOx. The model-measurement agreement is better for the pOK FRAME run. The results show large uncertainties related with wet deposition modelling due to uncertainties in rainfall data.

Keywords: wet deposition; sulphur; nitrogen; rainfall interpolation; spatial rainfall data; meteorological modelling; Poland; kriging; uncertainty; precipitation.

DOI: 10.1504/IJEP.2014.065925

International Journal of Environment and Pollution, 2014 Vol.55 No.1/2/3/4, pp.201 - 209

Available online: 29 Nov 2014 *

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