Variability of the marine boundary layer parameters over Baltic Sea sub-basins and their impact on nitrogen deposition

Abstract

The variability of the marine boundary layer parameters over the Baltic Sea and its sub-basins and their impact on the 6 h, monthly or seasonal deposition of oxidized nitrogen compounds was studied using results of the Hilatar chemistry-transport model, the 6th hour forecasts of the HIRLAM weather prediction model and meteorological measurement data. The monthly load of oxidized nitrogen was highest in the winters of 1993-1995 and 2000, and lowest in 1996-1997 and 2005; no trend was detected. Short-time correlations were low, but a significant correlation of the monthly deposition with the NAO index and ice-season was found over northern sub-basins.

Keywords

• Baltic Sea
• Airborne load
• Reactive nitrogen
• Marine boundary layer parameters