Atmospheric deposition of nitrogen. The Nation-Wide Danish Monitoring Programme 1993; Atmosfaerisk deposition af kvaelstof. Vandmiljoeplanens overvaagningsprogram 1993 Skov, H; Hovmand, M F; Grundahl, L; Runge, E H; Kemp, K; Aistrup, W; Heidam, N Z 54 ENVIRONMENTAL SCIENCES; DENMARK; WATER POLLUTION; PRECIPITATION; NITROGEN; SEAS; LONG-RANGE TRANSPORT; NITRIC ACID; AMMONIA; NITRATES; AGRICULTURE; MONITORING `The Nation-wide Danish Monitoring Programme` assembles information on nutrient input to Danish aquatic systems. Atmospheric nitrogen input to the Danish marine waters is dealt with, focusing on the nitrogen input to the Kattegat and to the Danish straits, sounds and fjords, a total sea surface area of 44,000 km{sup 2}. Measurement performed in 1989-90 indicated that atmospheric input accounts for 25%-33% of the total inorganic nitrogen load to the Kattegat and Danish straits. Measurements from 1992/1993 showed that atmospheric deposition accounts for ca. 33% of the inorganic nitrogen input. Wet deposition is sampled at 16 locations, including 7 coastal or island-based, and 6 gas and aerosol monitoring stations. Special attention is given to measurements of gaseous ammonia, nitric acid and the ammonium and nitrate contents of aerosols and precipitation. In 1993 the sum of the wet and dry deposition to the Kattegat was 0.80 tonnes nitrogen per km{sup 2}, the deposition to the Belts and western part of the Baltic Sea is 1.2 tonnes nitrogen per km{sup 2}. Total deposition load of nitrogen to the inner seas (44,000 km{sup 2}) is ca. 41,000 ton N in 1993 and ca. 90% of total deposition is wet deposition. Dry deposition of nitrogen contributes a minor part of total deposition. Daily measurements of gases and aerosols during 1989/1993 reveal long-range transport of most pollutants, with the exception of ammonia and ammonium. These components have Danish agricultural sources. Agriculture appears to be the most important source of nitrogen pollution. (AB) (15 refs.) Danmarks Miljoeundersoegelser, Roskilde (Denmark) OSTI as DE95772347 Denmark 1994-12-31 Danish Technical Report Other Information: PBD: 1994; Related Information: Faglig rapport fra DMU, 123 Medium: P; Size: 61 p. https://doi.org/ ON: DE95772347; ISBN 87-7772-180-2 [] NEI-DK-1945 Journal ID: ISSN 0905-815X; Other: ON: DE95772347; ISBN 87-7772-180-2; TRN: DK9501391 DK; SCA: 540320; PA: DK-95:001391; EDB-95:079038; NTS-95:016605; ERA-20:016586; SN: 95001394343 2008-02-04 49776