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In the first part of this study, we discussed the flux measurements. In the second part, we made a comparision of different methods, which are used for estimating nitrogen dry deposition. Part one is available since the beginning of this year. Part two was published this week.
In the second part, TRANC flux measurements were compared with modeled fluxes of the chemical transport models LOTOS-EUROS using the bidirectional flux model DEPAC. An in-situ application of DEPAC taking measured data as input was used. In addition, nitrogen dry deposition was estimated using the canopy budget technique.
Dry deposition of all methods was between 3.9 and 7.0 kg N ha-1 a-1. Differences between LOTOS-EUROS and TRANC flux measurements were related to an overestimation of modeled ammonia concentrations. In addition, we found that modeled dry deposition was enhanced during wet conditions. However, measured TRANC fluxes were larger during dry conditions.
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