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69 records – page 1 of 7.

Algae are melting away the Greenland ice sheet.

https://arctichealth.org/en/permalink/ahliterature275518
Source
Nature. 2016 Jul 21;535(7612):336
Publication Type
Article
Date
Jul-21-2016

Ammonium nitrate fertiliser production based on biomass - environmental effects from a life cycle perspective.

https://arctichealth.org/en/permalink/ahliterature95545
Source
Bioresour Technol. 2008 Nov;99(17):8034-41
Publication Type
Article
Date
Nov-2008
Author
Ahlgren Serina
Baky Andras
Bernesson Sven
Nordberg Ke
Norén Olle
Hansson Per-Anders
Author Affiliation
Swedish University of Agricultural Sciences, Department of Energy and Technology, P.O. Box 7032, SE 750 07 Uppsala, Sweden. Serina.Ahlgren@et.slu.se
Source
Bioresour Technol. 2008 Nov;99(17):8034-41
Date
Nov-2008
Language
English
Publication Type
Article
Keywords
Biomass
Environment
Eutrophication
Fertilizers
Fossil Fuels
Greenhouse Effect
Nitrates - chemical synthesis
Salix - growth & development
Abstract
Ammonium nitrate and calcium ammonium nitrate are the most commonly used straight nitrogen fertilisers in Europe, accounting for 43% of the total nitrogen used for fertilisers. They are both produced in a similar way; carbonate can be added as a last step to produce calcium ammonium nitrate. The environmental impact, fossil energy input and land use from using gasified biomass (cereal straw and short rotation willow (Salix) coppice) as feedstock in ammonium nitrate production were studied in a cradle-to-gate evaluation using life cycle assessment methodology. The global warming potential in the biomass systems was only 22-30% of the impact from conventional production using natural gas. The eutrophication potential was higher for the biomass systems due to nutrient leaching during cultivation, while the acidification was about the same in all systems. The primary fossil energy use was calculated to be 1.45 and 1.37MJ/kg nitrogen for Salix and straw, respectively, compared to 35.14MJ for natural gas. The biomass production was assumed to be self-supporting with nutrients by returning part of the ammonium nitrate produced together with the ash from the gasification. For the production of nitrogen from Salix, it was calculated that 3914kg of nitrogen can be produced every year from 1ha, after that 1.6% of the produced nitrogen has been returned to the Salix production. From wheat straw, 1615kg of nitrogen can be produced annually from 1ha, after that 0.6% of the nitrogen has been returned.
PubMed ID
18440225 View in PubMed
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An application of contingent valuation and decision tree analysis to water quality improvements.

https://arctichealth.org/en/permalink/ahliterature93968
Source
Mar Pollut Bull. 2007;55(10-12):591-602
Publication Type
Article
Date
2007
Author
Atkins Jonathan P
Burdon Daryl
Allen James H
Author Affiliation
Centre for Economic Policy, The Business School, University of Hull, Hull HU6 7RX, UK.
Source
Mar Pollut Bull. 2007;55(10-12):591-602
Date
2007
Language
English
Publication Type
Article
Keywords
Conservation of Natural Resources - economics - methods
Decision Trees
Eutrophication
Humans
Oceans and Seas
Public Opinion
Quality Control
Water - standards
Abstract
This paper applies contingent valuation and decision tree analysis to investigate public preferences for water quality improvements, and in particular reduced eutrophication. Such preferences are important given that the development of EU water quality legislation is imposing significant costs on European economies. Results are reported of a survey undertaken of residents of Arhus County, Denmark for water quality improvements in the Randers Fjord. Results demonstrate strong public support for reduced eutrophication and identify key determinants of such support.
PubMed ID
17945312 View in PubMed
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[Anthropogenic impact on fish parasite fauna in lakes].

https://arctichealth.org/en/permalink/ahliterature154940
Source
Parazitologiia. 2008 Jul-Aug;42(4):300-7
Publication Type
Article
Author
E A Rumiantsev
Source
Parazitologiia. 2008 Jul-Aug;42(4):300-7
Language
Russian
Publication Type
Article
Keywords
Animals
Drainage, Sanitary
Ecosystem
Eutrophication
Fisheries
Fishes - parasitology
Fresh Water - parasitology
Humans
Parasite Egg Count
Population Density
Russia
Time Factors
Water Pollution, Chemical
Abstract
Anthropogenic influence on the fish parasite fauna in lakes is studied. Three types of the influence are considered, namely pollution by industrial effluent, anthropogenic eutrophication, and development of aquaculture. Their effects on the fish parasite fauna were found to be different.
PubMed ID
18825921 View in PubMed
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Anthropogenic oligotrophication via liming: Long-term phosphorus trends in acidified, limed, and neutral reference lakes in Sweden.

https://arctichealth.org/en/permalink/ahliterature259821
Source
Ambio. 2014;43 Suppl 1:104-12
Publication Type
Article
Date
2014
Author
Qian Hu
Brian J Huser
Source
Ambio. 2014;43 Suppl 1:104-12
Date
2014
Language
English
Publication Type
Article
Keywords
Environmental monitoring
Eutrophication
Hydrogen-Ion Concentration
Lakes - chemistry
Phosphorus - chemistry
Seasons
Sweden
Water Pollution, Chemical - adverse effects
Abstract
Restoration of acidified lakes by liming does not, in many cases, improve productivity to a pre-acidified state. We hypothesize that the poor recovery detected in many of these lakes is due to constrained in-lake phosphorous (P) cycling caused by enhanced precipitation of metals in higher pH, limed waters. Long-term (1990-2012) data for 65 limed, circum-neutral (pH 6-8), and acidified lakes in Sweden were analyzed to determine trends for P and potential drivers of these trends. Limed lakes not only had lower mean values and stronger decreasing trends for total P than non-limed lakes, but they also had the highest percentage of decreasing trends (85 %). A P release factor (Hypolimnetic P/Epilimnetic P) was developed to elucidate differences in internal P cycling between lake groups. Consistently, lower P release factors in limed lakes show limitation of internal P cycling during summer months that may be a factor limiting P bioavailability and thus productivity of these systems.
Notes
Cites: Ambio. 2013 Sep;42(5):577-8623288615
Cites: Environ Sci Technol. 2013 Feb 19;47(4):1809-1523360552
Cites: Sci Total Environ. 2009 May 15;407(11):3554-6219243811
Cites: Sci Total Environ. 2008 Oct 15;404(2-3):269-7518760448
Cites: Nature. 2007 Nov 22;450(7169):537-4018033294
Cites: Environ Sci Technol. 2005 Nov 15;39(22):8784-916323777
Cites: Environ Pollut. 2005 Sep;137(1):165-7615944047
Cites: Environ Pollut. 2005 Sep;137(1):55-7115944040
Cites: Sci Total Environ. 2005 Jan 5;336(1-3):135-5415589255
Cites: Water Res. 2001 Nov;35(16):3783-9012230160
Cites: Sci Total Environ. 1999 Dec 15;243-244:107-1810635594
Cites: Glob Chang Biol. 2014 Sep;20(9):2752-6424535943
PubMed ID
25403973 View in PubMed
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Assimilation of satellite data to 3D hydrodynamic model of Lake Säkylän Pyhäjärvi.

https://arctichealth.org/en/permalink/ahliterature267761
Source
Water Sci Technol. 2015;71(7):1033-9
Publication Type
Article
Date
2015
Author
Akiko Mano
Olli Malve
Sampsa Koponen
Kari Kallio
Antti Taskinen
Janne Ropponen
Janne Juntunen
Ninni Liukko
Source
Water Sci Technol. 2015;71(7):1033-9
Date
2015
Language
English
Publication Type
Article
Keywords
Environmental Monitoring - methods
Eutrophication
Finland
Hydrodynamics
Lakes - analysis
Models, Theoretical
Remote Sensing Technology
Spacecraft
Water Quality
Abstract
To analyze the applicability of direct insertion of total suspended matter (TSM) concentration field based on turbidity derived from satellite data to numerical simulation, dispersion studies of suspended matter in Lake Säkylän Pyhäjärvi (lake area 154 km²; mean depth 5.4 m) were conducted using the 3D COHERENS simulation model. To evaluate the practicality of direct insertion, five cases with different initialization frequencies were conducted: (1) every time, when satellite data were available; (2) every 10 days; (3) 20 days; (4) 30 days; and (5) control run without repeated initialization. To determine the effectiveness of initialization frequency, three methods of comparison were used: simple spatial differences of TSM concentration without biomass in the lake surface layer; averaged spatial differences between initialization data and the forecasts; and time series of TSM concentration and observation data at 1 m depth at the deepest point of the lake. Results showed that direct insertion improves the forecast significantly, even if it is applied less often.
PubMed ID
25860706 View in PubMed
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Bioextraction potential of seaweed in Denmark - An instrument for circular nutrient management.

https://arctichealth.org/en/permalink/ahliterature290782
Source
Sci Total Environ. 2016 Sep 01; 563-564:513-29
Publication Type
Journal Article
Date
Sep-01-2016
Author
Michele Seghetta
Ditte Tørring
Annette Bruhn
Marianne Thomsen
Author Affiliation
Research Group on EcoIndustrial System Analysis, Department of Environmental Science, Faculty of Science and Technology, Aarhus University, Frederiksborgvej 399, 4000 Roskilde, Denmark.
Source
Sci Total Environ. 2016 Sep 01; 563-564:513-29
Date
Sep-01-2016
Language
English
Publication Type
Journal Article
Keywords
Denmark
Eutrophication
Fertilizers - analysis
Nitrogen - analysis
Phosphorus - analysis
Seaweed - metabolism
Waste Management - methods
Water Pollutants, Chemical - analysis
Water Pollution, Chemical - prevention & control
Abstract
The aim of the study is to assess the efficacy of seaweed for circular nutrient management to reduce eutrophication levels in the aquatic environment. We performed a comparative Life Cycle Assessment (LCA) of two reference waste management systems treating seaweed as biowaste, i.e. landfill disposal and combustion, and an alternative scenario using the seaweed Saccharina latissima as a resource for biobased fertilizer production. Life Cycle Impact Assessment (LCIA) methods were improved by using a cradle-to-cradle approach, quantifying fate factors for nitrogen and phosphorus loss from fertilized agriculture to the aquatic environment. We also differentiated between nitrogen- and phosphorus-limited marine water to improve the traditional freshwater impact category, making this indicator suitable for decision support in relation to coastal water management schemes. Offshore cultivation of Saccharina latissima with an average productivity of 150Mg/km(2) in Danish waters in 2014 was applied to a cultivation scenario of 208km(2). The bioresource scenario performs better than conventional biowaste management systems, delivering a net reduction in aquatic eutrophication levels of 32.29kgNeq. and 16.58kgPO4(3-)eq. per Mg (dry weight) of seaweed, quantified by the ReCiPe and CML impact assessment methods, respectively. Seaweed cultivation, harvest and reuse of excess nutrients from the aquatic environment is a promising approach for sustainable resource cycling in a future regenerative economy that exploits manmade emissions as a resource for closed loop biobased production while significantly reducing eutrophication levels in 3 out of 7 Danish river basin districts. We obtained at least 10% bioextraction of phosphorus manmade emissions (10%, 89% and >100%) and contributed significantly to local nitrogen reduction goals according to the Water Framework Directive (23%, 78% and >100% of the target).
PubMed ID
27152993 View in PubMed
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The challenge of bridging science and policy in the Baltic Sea eutrophication governance in Finland: the perspective of science.

https://arctichealth.org/en/permalink/ahliterature135801
Source
Ambio. 2011 Mar;40(2):191-9
Publication Type
Article
Date
Mar-2011
Author
Mia Pihlajamäki
Nina Tynkkynen
Author Affiliation
Finnish Institute of International Affairs, Helsinki, Finland. mia.pihlajamaki@fiia.fi
Source
Ambio. 2011 Mar;40(2):191-9
Date
Mar-2011
Language
English
Publication Type
Article
Keywords
Baltic States
Decision Making
Eutrophication
Finland
Humans
Knowledge
Oceans and Seas
Public Policy
Science
Abstract
This article examines the views of scientists on intricacies of scientific knowledge that affect science-policy interface in the Baltic Sea eutrophication governance in Finland. The analysis demonstrates that these intricacies can be divided into five categories: (1) uncertainty of knowledge concerning ecological processes, (2) heterogeneity of knowledge, (3) societal and political call for (certain) knowledge, (4) contingency of the knowledge that ends up taken as a baseline for decision making and further research, and (5) linkages of knowledge production, processing, and communication to particular characteristics of individual researchers and research societies. By explicating these aspects, this article illustrates the ways in which scientific knowledge concerning eutrophication is human-bound and susceptible to interpretation, thus adding on to the uncertainty of the Baltic Sea environmental governance. The aim is, then, to open up perspectives on how ambiguities related to science-policy interface could be coped with.
Notes
Cites: Ambio. 2007 Apr;36(2-3):186-9417520933
Cites: Ambio. 2001 Aug;30(4-5):222-3111697254
PubMed ID
21446397 View in PubMed
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Chemical lake restoration products: sediment stability and phosphorus dynamics.

https://arctichealth.org/en/permalink/ahliterature98443
Source
Environ Sci Technol. 2010 Feb 1;44(3):985-91
Publication Type
Article
Date
Feb-1-2010
Author
Sara Egemose
Kasper Reitzel
Frede Ø Andersen
Mogens R Flindt
Author Affiliation
Institute of Biology, University of Southern Denmark, Campusvej 55, DK-5230 Odense M, Denmark. saege@biology.sdu.dk
Source
Environ Sci Technol. 2010 Feb 1;44(3):985-91
Date
Feb-1-2010
Language
English
Publication Type
Article
Keywords
Conservation of Natural Resources
Denmark
Eutrophication
Fresh Water - chemistry
Geologic Sediments - chemistry
Phosphorus - chemistry
Water Pollutants, Chemical - chemistry
Abstract
Laboratory experiments with sediments from three shallow Danish lakes were conducted to evaluate the effects of chemical lake restoration products during resuspension. Phosphorus (P) removal, sediment stability, sediment consolidation and color reduction were studied over time. The investigated products were aluminum (Al), Phoslock (a commercial bentonite product coated with lanthanum) and a combination of Al covered with bentonite (Al/Ben). All treatments effectively reduced the P concentration in the water. However, the treatments containing Al reduced the P concentration immediately after resuspension, whereas Phoslock required several days after resuspension to reduce the P concentration. Especially Phoslock, but also Al/Ben, increased the sediment stability threshold by 265% and 101%, respectively, whereas Al had no stabilizing effect. The fresh Al floc was resuspended 5x easier than untreated sediment. The largest consolidation of the sediment occurred with addition of Phoslock, followed by Al/Ben, while Al alone had no effect. Enhanced consolidation may be of importance for macrophyte colonisation of organic sediment. Phoslock improved the light climate moderately by removing color, whereas Al was very effective in removing color. Ben/Al showed intermediate effects on color reduction. These findings are important when decisions are made on restoration method for a specific lake, which may be more or less wind exposed.
PubMed ID
20055487 View in PubMed
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Climate change impact on water quality: model results from southern Sweden.

https://arctichealth.org/en/permalink/ahliterature95752
Source
Ambio. 2005 Nov;34(7):559-66
Publication Type
Article
Date
Nov-2005
Author
Arheimer Berit
Andréasson Johan
Fogelberg Sofia
Johnsson Holger
Pers Charlotta B
Persson Kristian
Author Affiliation
Hydrological Research Unit, Swedish Meteorological and Hydrological Institute, Norrköping, Sweden. berit.arheimer@smhi.se
Source
Ambio. 2005 Nov;34(7):559-66
Date
Nov-2005
Language
English
Publication Type
Article
Keywords
Climate
Computer simulation
Ecosystem
Eutrophication
Fresh Water - chemistry
Geography
Models, Theoretical
Nitrogen - analysis
Phosphorus - analysis
Soil - analysis
Sweden
Water Movements
Abstract
Starting from six regional climate change scenarios, nitrogen leaching from arable-soil, water discharge, and nitrogen retention was modeled in the Rönneå catchment. Additionally, biological response was modeled in the eutrophic Lake Ringsjön. The results are compared with similar studies on other catchments. All scenarios gave similar impact on water quality but varied in quantities. However, one scenario resulted in a different transport pattern due to less-pronounced seasonal variations in the hydrology. On average, the study shows that, in a future climate, we might expect: i) increased concentrations of nitrogen in the arable root zone (+50%) and in the river (+13%); ii) increased annual load of nitrogen from land to sea (+22%) due to more pronounced winter high flow; moreover, remote areas in the catchment may start to contribute to the outlet load; iii) radical changes in lake biochemistry with increased concentrations of total phosphorus (+50%), total nitrogen (+20%), and planktonic algae such as cyanobacteria (+80%).
PubMed ID
16435746 View in PubMed
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69 records – page 1 of 7.