ANICE: Atmospheric Inputs of nitrogen compounds into the North Sea: First results: a contribution to subproject CAPMAN
de Leeuw, G.
von Salzen, K.
TNO Fysisch en Elektronisch Laboratorium
Midgley, P.M. (editor)
Reuther, M. (editor)
Williams, M. (editor)
Terrestrial inputs of nitrogen are often dominated by riverine transport, especially in the winter (Sanders et al., 1997). However, the atmospheric contribution to the total land based nitrogen input has been reported to be on the order of 30 % for the total North Sea area (North Sea Task Force, 1993). The atmospheric nitrogen load is directly available for algae growth, which makes this contribution more significant because a large fraction of the river run off contributes nitrogen fixed to biological material and hence is not directly available. Estimates of atrnospheric nitrogen inputs are often based on measurements over land and sometimes on measurements at open sea. Coastal effects on the total nitrogen depositions are included in a sirnplistic way, if at all. However, the largest changes in both the physical and chemical properties of an air mass advected from land over sea, and therefore also in the resulting processes, are expected in coastal regions. Since continental sources of atrnospheric nitrogen species dominate, sharp gradients in concentrations and associated fluxes are expected across the coastal zone
To reference this document use:
Proceedings of EUROTRAC Symposium 2000 Garmisch-Partenkirchen, Germany 27–31 March 2000 Eurotrac-2, 1-5