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Scenario Analysis on Human Protein consumption and Climate change effects on riverine N export to the Balitc Sea
Stockholms universitet, Naturvetenskapliga fakulteten, Institutionen för tillämpad miljövetenskap (ITM).
Stockholms universitet, Naturvetenskapliga fakulteten, Institutionen för tillämpad miljövetenskap (ITM).ORCID-id: 0000-0002-0649-5599
Stockholms universitet, Naturvetenskapliga fakulteten, Institutionen för geologi och geokemi.
Stockholms universitet, Stockholm Resilience Centre, Baltic Nest Institute.
(Engelska)Manuskript (preprint) (Övrigt vetenskapligt)
Nyckelord [en]
nitrogen, agriculture, eutrophication, Baltic Sea, catchment, modeling, climate change, primary emissions
Identifikatorer
URN: urn:nbn:se:su:diva-32491OAI: oai:DiVA.org:su-32491DiVA, id: diva2:280733
Tillgänglig från: 2009-12-11 Skapad: 2009-12-11 Senast uppdaterad: 2018-01-24Bibliografiskt granskad
Ingår i avhandling
1. Nitrogen land-sea fluxes in the Baltic Sea catchment: Empirical relationships and budgets
Öppna denna publikation i ny flik eller fönster >>Nitrogen land-sea fluxes in the Baltic Sea catchment: Empirical relationships and budgets
2010 (Engelska)Doktorsavhandling, sammanläggning (Övrigt vetenskapligt)
Abstract [en]

In this thesis empirical relationships and modeling tools are used to describe the relationship between human activities and meso- and large scale riverine N fluxes from land to sea.

On a large scale Paper I showed that by only having knowledge about human population size and runoff one can estimate the riverine export of DIN (r2= 0.76). In Paper II we included two other important anthropogenic N inputs, i.e. atmospheric deposition and primary emission (PE) from animals. In most of the catchments the PE from animals were larger than the PE from humans. Hence, development of livestock is important and increased animal protein consumption by humans might increase the riverine N export. Scenario analysis (Paper II) show that climate change is expected to both decrease and increase the riverine N export depending on which part of the catchment is modeled.

In the southern and eastern parts of the Baltic Sea catchment there is large potential for N reductions from point sources (Papers III & V). The diffuse sources are more difficult to decrease and a reduction of mineral fertilizer does not always lead to reduced N loadings because the agricultural systems can buffer even a slight surplus (Paper III). There is inertia in the catchments which can be seen in for example in the northern part of the catchment. Here atmospheric N deposition is almost as high as in the southern part but the nitrogen flux from these rivers is not elevated. These northern river catchments have N exports of the same magnitude as the natural background (Paper IV), indicating that the atmospheric N deposition is retained in the system and probably taken up by N limited boreal forests. However, important reductions can be achieved in the agricultural sector by detailed management of the planted land and animal manure. The highest sensitivity is in catchments with high animal density and high specific discharge, primarily draining to Kattegat and Danish Straits (Paper II & IV).

Ort, förlag, år, upplaga, sidor
Stockholm: Department of Applied Environmental Science (ITM), 2010. s. 40
Nyckelord
Nitrogen fluxes, Baltic Sea, primary emissions, riverine export, Scenario analysis, climate change, animal protein consumption, fertilizer use
Nationell ämneskategori
Miljövetenskap
Forskningsämne
tillämpad miljövetenskap
Identifikatorer
urn:nbn:se:su:diva-32493 (URN)978-91-7155-988-3 (ISBN)
Disputation
2010-01-29, De Geersalen, Geovetenskapens hus, Svante Arrhenius väg 14, Stockholm, 13:00 (Engelska)
Opponent
Handledare
Anmärkning
At the time of doctoral dissertation the following publications were unpublished and had a status as follows: Paper 2: Manuscript. Paper 4: ManuscriptTillgänglig från: 2010-01-07 Skapad: 2009-12-11 Senast uppdaterad: 2010-01-27Bibliografiskt granskad

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Av författaren/redaktören
Eriksson Hägg, HannaHumborg, ChristophMörth, Carl- Magnus
Av organisationen
Institutionen för tillämpad miljövetenskap (ITM)Institutionen för geologi och geokemiBaltic Nest Institute

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