Blar i NIVA Open Access Archive på emneord "jord"

Viser treff 1-16 av 16

    • Atmospheric deposition of nitrogen, runoff of organic nitrogen, and critical loads for soils and waters 

      Wright, R.; Raastad, I.A.; Kaste, Ø. (NIVA-rapport;3592, Research report, 1997)
      Here we test the hypothesis that increased deposition of inorganic N compounds leads to increased leachingand runoff of organic N and thus a higher critical load. We use mainly Norwegian data from input-output fluxes at ...

    • Dynamic models for predicting soil and water acidification: Application to three catchments in Fenno-Scandia 

      Holmberg, M. (NIVA-rapport;2675, Research report, 1991)
      We report here the application of 4 dynamic prosess-oriented models of soil and water acidification to data from three calibrated catchments: Birkenes, an acidified site in southernmost Norway, Stubbetorp, a traditional ...

    • Gårdsjön Status Report for 1991-1992: The first Year of Treatment 

      Anderson, I.; Brandrud, T.E.; Dise, N.; Clemensson-Lindell, A.; Hultberg, H.; Huse, M.; Kjønnaas, J.; Moldan, F.; Nygaard, P.H.; Nystrøm, U.; Persson, H.; Rudi, G.; Stuanes, A. (NIVA-rapport;2915, Research report, 1993)
      Nitrogen addition weekly to catchment G2 at Gårdsjön began April 1991. During the first year of treatment a total of 230 meq/m²yr NH4No3 was added in 33 mm of water plus 90 meq/m²/yr deposited in 631 mm throughfall. Runoff ...

    • Map of critical loads (sulphur) for coniferous forest soils in Norway 

      Wright, R.; Rudi, G.; Frogner, T.; Håøya, A.-O.; Cosby, J.B.; Esser, J.M. (NIVA-rapport;2830, Research report, 1992)
      Maps of critical loads of acidity and exceedance (sulphur) for coniferous forest soils in Norway have been compiled using the dynamic MAGIC model based on the soil survey data of NIJOS and NISK, the atmospheric deposition ...

    • Mapping critical levels/loads for the Slovak Republic 

      Wathne, B. (NIVA-rapport;3226, Research report, 1995)
      As a part of the Agreement on Environmental Cooperation between Norway and Slovakia, a project "Mapping Critical Levels/Loads for Slovakia" has started. The results from the first pilot phase are presented. A pilot area ...

    • Maps of critical loads and exceedance for sulfur and nitrogen to forest soils in Norway 

      Frogner, T.; Wright, R.; Cosby, J.B.; Esser, J.M. (NIVA-rapport;3090, Research report, 1994)
      We use the dynamic MAGIC model to calculate critical loads of sulfur and nitrogen for forest soils in Norway. Inputs include the soil surveydata of NIJOS and NISK, the atmospheric deposition data of NILU, the forest ...

    • Nitrex project - Gårdsjöen, Status report for 1990-91 

      Dise, N.; Wright, R.; Andersson, I.; Brandrud, T.E.; Carlsson, U.; Clemensson-Lindell, A.; Hauhs, M.; Hultberg, H.; Huse, M.; Kjønnaas, J.; Klemedtsson, L.; Kroglund, F.; Müller, D.; Nygaard, P.H.; Nyström, U.; Stuanes, A.; Wohlfeil, I. (NIVA-rapport;2694, Research report, 1992)
      At the NITREX site at Gårdsjön, Sweden, ambient nitrogen deposition of 90 meg m² yr 1 will be experimentally increased by 286 meg m² yr 1 to an entire forested catchment G2 to study the potential for nitrogen saturation. ...

    • NITREX project - Gårdsjøn. Status report for 1988-1990 

      Wright, R.; Brandrud, T.E.; Kroglund, F.; Wohlfeil, I.; Andersson, I.; Carlsson, U.; Clemensson-Lindell, A.; Hultberg, H.; Kjønaas, J.; Müller, D.; Nystrøm, U.; Persson, H.; Stuanes, A. (NIVA-rapport;2545, Research report, 1991)
      At the NITREX site at Gårdsjøn, Sweden, nitrogen deposition will be experimentally increased to an entire forested catchment to study the potential for nitrogen saturation. Investigations include regular sampling of ...

    • NITREX: Phase 2 Final Report 

      Wright, R. (NIVA-rapport;3310, Research report, 1995)
      NITREX-2 comprises the second phase of the European NITREX project (Nitrogen Saturation Experiments). This report deals with results obtained during phase 2, which ran from 1 November 1993 - 31 March 1995. NITREX continues ...

    • NITREX: Phase 3. Final Report 

      Wright, R. (NIVA-rapport;3489, Research report, 1996)
      NITREX-3 comprises the third phase of the European NITREX project (Nitrogen saturation experiments). This report contains the abstracts of work performed during phase 3, which ran from 1 April 1995 - 31 March 1996. The ...

    • Reversibility of acidification: Soils and surface waters 

      Wright, R.; Hauhs, M. (NIVA-rapport;2479, Research report, 1990)
      Recent declining levels of acid deposition in both North America and Europe have initiated reversal of acidification and recovery of impacted ecosystems. The reversibility of acidification has also been investigated by ...

    • Review of the Gothenburg Protocol: Chemical and biological responses in surface waters and soils (ICP Waters report 89/2007) 

      Wright, R.; Posch, Maximilian; Cosby, B. Jack; Forsius, Martin; Skjelkvåle, B.L. (NIVA-rapport;5475, Research report, 2007-08)
      Monitoring data from ICP Waters and ICP Integrated Monitoring as well as other sources show clear and large regional recovery in surface water chemistry in response to the large decreases in deposition of sulphur and to a ...

    • Soils in mountain and upland regions of southwestern Norway nitrogen leaching and critical loads 

      Wright, R.; Mulder, J.; Esser, Jacqueline M. (NIVA-rapport;4130, Research report, 1999)
      Soil data were collected from 36 points in mountain and upland areas of southwestern Norway. Samling was at cross-points on the NIJOS`9x9 km grid used for forest and soil monitoring. The soils were linked to water chemistry ...

    • Tålegrenser og overskridelse av tålegrenser for overflatevann, skogsjord og vegetasjon i Norge 

      Henriksen, A.; Buan, A.K. (NIVA-rapport;4179, Research report, 2000)
      Det nasjonale programmet Naturens Tålegrenser skal bl.a. gi innspill til pågående aktiviteter under Konvensjonen for Langtranstransporterte Grenseoverskridende Luftforurensninger (LRTAP). Det internasjonale arbeidet med ...

    • Tålegrenser og overskridelser av tålegrenser i Norge 

      Larssen, T.; Høgåsen, T. (NIVA-rapport;4722, Research report, 2003)
      Rapporten presenterer oppdaterte kart for naturens tålegrenser for forsuring av overflatevann, skogsjord og effekter av overgjødsling fra nitrogenavsetning på terrestrisk vegetasjon. Overskridelser av tålegrensene er ...

    • Trace metals in Norwegian surface waters, soils, and lake sediments - relation to atmospheric deposition 

      Skjelkvåle, B.L.; Steinnes, E.; Rognerud, S.; Fjeld, E.; Berg, T.; Røyset, O. (NIVA-rapport;5222, Research report, 2006)
      This report presents results from simultaneous trace metal surveys 1995 in Norway on atmospheric deposition based on moss analysis, the humic layer of soils, lake sediments, and surface waters. The samples of sediment and ...