Scheda di dettaglio – i prodotti della ricerca
| Dato | Valore |
|---|---|
| Title | Wet and dry atmospheric deposition at prealpine and alpine sites in northern Italy |
| Abstract | Modified wet and dry samplers that use a water surface to collect dry deposition were used in a pluriannual field campaign in five sites in alpine and prealpine areas of Lombardy (Italy). SO42-, NO3- Cl- and NH4+ concentrations in rainfall increased from north to south; the southern area being closest to industrialised areas of the Po Valley. In dry deposition the spatial pattern of sulphur and nitrogen species was ostensibly linked to local pollution sources. In winter, the SO42- concentration in dry deposition samples from Morbegno turban) and Longone (semi-urban) was about 3 times that in summer in association with low pH, explained as due to a higher rate of SO2 dissolution in winter followed by oxidation to sulphuric acid. The dry deposition of Ca2+, Mg2+ and K+ formed 41-60, 35-64 and 57-67% of the total flux, respectively; furthermore 25-50% of total SO42-, 21-37% of total NH4+, and 23-31% of total NO3- came from dry deposition. Only at the remote high-altitude site was the dry deposition of these species insignificant. The sum of the wet and dry deposition rates indicated that current nitrogen loads exceed the nutrient critical loads by several kg N ha(-1) at all investigated sites. Measured nitrogen loads at Longone and Castione (rural) were about 4 times higher than critical values, (C) 2000 Elsevier Science Ltd. All rights reserved. |
| Source | Atmospheric environment (1994) 34 (9), pp. 1455–1470 |
| Keywords | wet depositiondry depositionwater surfaceammonium sulphatesulphur dioxideatmospheric fluxescritical loads |
| Journal | Atmospheric environment (1994) |
| Editor | Pergamon., Oxford, Regno Unito |
| Year | 2000 |
| Type | Articolo in rivista |
| DOI | 10.1016/S1352-2310(99)00404-5 |
| Authors | Balestrini, R; Galli, L; Tartari, G |
| Text | 317251 2000 10.1016/S1352 2310 99 00404 5 ISI Web of Science WOS 000085972900010 wet deposition dry deposition water surface ammonium sulphate sulphur dioxide atmospheric fluxes critical loads Wet and dry atmospheric deposition at prealpine and alpine sites in northern Italy Balestrini, R; Galli, L; Tartari, G Consiglio Nazionale delle Ricerche CNR Modified wet and dry samplers that use a water surface to collect dry deposition were used in a pluriannual field campaign in five sites in alpine and prealpine areas of Lombardy Italy . SO42 , NO3 Cl and NH4 concentrations in rainfall increased from north to south; the southern area being closest to industrialised areas of the Po Valley. In dry deposition the spatial pattern of sulphur and nitrogen species was ostensibly linked to local pollution sources. In winter, the SO42 concentration in dry deposition samples from Morbegno turban and Longone semi urban was about 3 times that in summer in association with low pH, explained as due to a higher rate of SO2 dissolution in winter followed by oxidation to sulphuric acid. The dry deposition of Ca2 , Mg2 and K formed 41 60, 35 64 and 57 67% of the total flux, respectively; furthermore 25 50% of total SO42 , 21 37% of total NH4 , and 23 31% of total NO3 came from dry deposition. Only at the remote high altitude site was the dry deposition of these species insignificant. The sum of the wet and dry deposition rates indicated that current nitrogen loads exceed the nutrient critical loads by several kg N ha 1 at all investigated sites. Measured nitrogen loads at Longone and Castione rural were about 4 times higher than critical values, C 2000 Elsevier Science Ltd. All rights reserved. 34 Wet and dry atmospheric deposition at prealpine and alpine sites in northern Italy AtmEnv2000.pdf Articolo in rivista Pergamon. 1352 2310 Atmospheric environment 1994 Atmospheric environment 1994 Atmos. environ. 1994 raffaella.balestrini BALESTRINI RAFFAELLA |