Dry and wet N deposition fluxes at SDS and TFS from September 2009 to August 2010.

aNd and Nw denote N dry and wet deposition, respectively; full names of other Nr species are listed in Table 1; b“µg N m−3″ denotes the unit of atmospheric concentration for NH3, NO2, pHN4+, pNO3− and HNO3 and “g N m−3” denotes the concentration unit for NH4-N and NO3-N in precipitation; cs.e. denotes standard deviation of means; dTaken from Zhang et al. (2004). Due to the lack of measurements of HNO3 at SDS in this study, as a first estimation we assume the same HNO3 concentration at SDS as at TFS.