Modelling and mapping ozone deposition in Europe

被引:75
作者
Emberson, LD
Ashmore, MR
Simpson, D
Tuovinen, JP
Cambridge, HM
机构
[1] Univ York, Stockholm Environm Inst York, York YO10 5YW, N Yorkshire, England
[2] Univ Bradford, Dept Environm Sci, Bradford BD7 1DP, W Yorkshire, England
[3] Norwegian Meteorol Inst, EMEP, MSC W, N-0313 Oslo, Norway
[4] Finnish Meteorol Inst, FIN-00810 Helsinki, Finland
关键词
AOT40; stomatal flux; ozone deposition; policy formulation;
D O I
10.1023/A:1013851116524
中图分类号
X [环境科学、安全科学];
学科分类号
08 ; 0830 ;
摘要
A new dry deposition module has been developed for European-scale mapping and modelling of ozone deposition fluxes (Emberson et al., 2000a,b). The module is being implemented in the photochemical long-range transport model of EMEP that is currently used to estimate exceedance of the existing critical levels for ozone within the UN ECE LRTAP programme. The deposition model evaluates the atmospheric, boundary layer and surface resistances to ozone transfer with the calculation of the dry deposition velocity performed according to a standard resistance formulation. The approach differs from other existing methods through the use of a detailed stomatal uptake model that describes stomatal conductance as a function of plant species, phenology and four environmental variables (air temperature, solar radiation, water vapour pressure deficit and soil moisture deficit). Comparison of preliminary model outputs for selected land-cover types indicate that the model is capable of predicting the seasonal and diurnal range in deposition velocities that have been reported previously in the literature. The application of this deposition scheme enables calculations of ambient ozone concentrations to be made using a biologically based method that can distinguish stomatal and non-stomatal components of total ozone deposition. The ability to estimate stomatal ozone fluxes (according to vegetation type, phenology and spatial location) that are consistent with evaluations of atmospheric ozone concentrations will be helpful in future assessments of ozone impacts to vegetation.
引用
收藏
页码:577 / 582
页数:6
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