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Søren Jessen
University of Copenhagen
38Publications
10H-index
658Citations
Publications 38
Newest
#1Catharina Simone Nisbeth (UCPH: University of Copenhagen)H-Index: 1
#2Federica Tamburini (ETH Zurich)H-Index: 18
Last.David William O'Connell (Trinity College, Dublin)
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Abstract. The ability to identify the origin of phosphorus is essential to effectively mitigate eutrophication of freshwater ecosystems. The oxygen isotope composition of orthophosphate (δ18Op) has been suggested to have a significant prospective as a tracer for P entering freshwater ecosystems. The δ18Op tracing method is, however, still in its preliminary stages and has proven challenging to implement for new practitioners. In order to achieve progress in developing the application of δ18Op si...
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#2Jacob KidmoseH-Index: 10
Last.Søren JessenH-Index: 10
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The general perception has long been that lake eutrophication is driven by anthropogenic sources of phosphorus (P) and that P is immobile in the subsurface and in aquifers. Combined investigation of the current water and P budgets of a 70 ha lake (Norreso, Fyn, Denmark) in a clayey till-dominated landscape and of the lake’s Holocene trophic history demonstrates a potential significance of geogenic (natural) groundwater-borne P. Norreso receives water from nine streams, a groundwater-fed spring l...
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#1Shahrukh Nawaz Khan (GCUF: Government College University, Faisalabad)H-Index: 1
#2Tahira Yasmeen (GCUF: Government College University, Faisalabad)H-Index: 14
Last.Søren Jessen (UCPH: University of Copenhagen)H-Index: 10
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Abstract Excessive use of nitrogenous fertilizers and their improper management in agriculture causes nitrate contamination of surface and groundwater resources. This study was conducted along the seasonally flooded alluvial agricultural area of Indus River Basin to determine the spatial and temporal dynamics of nitrate concentrations in the groundwater along the river. Total of 112 samples were collected from shallow (30–40 ft) and deep groundwater (120–150 ft) wells at seven sites, 25 km apart...
1 CitationsSource
#1Anders Krogh Lemminger (UCPH: University of Copenhagen)H-Index: 1
#2Søren Jessen (UCPH: University of Copenhagen)H-Index: 10
Last.Morten Hostrup (UCPH: University of Copenhagen)H-Index: 13
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#2Søren JessenH-Index: 10
Last.Peter EngesgaardH-Index: 19
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A managed riparian lowland in a glacial landscape (Holtum catchment, Denmark) was studied to quantify the relative importance of subsurface and surface flow to the recipient stream. The hydrogeological characterization combined geoelectrical methods, lithological logs, and piezometric heads with monthly flow measurements of springs, a ditch, and a drain, to determine seasonality and thereby infer flow paths. In addition, groundwater discharge through the streambed was estimated using temperature...
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#1Carlos DuqueH-Index: 10
#2Søren JessenH-Index: 10
Last.Peter EngesgaardH-Index: 19
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Submarine groundwater discharge (SGD)—including terrestrial freshwater, density-driven flow at the saltwater–freshwater interface, and benthic exchange—can deliver nutrients to coastal areas, generating a negative effect in the quality of marine water bodies. It is recognized that water stable isotopes (18O and 2H) can be helpful tracers to identify different flow paths and origins of water. Here, we show that they can be also applied when assessing sources of nutrients to coastal areas. A field...
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#2Søren JessenH-Index: 10
Last.Kasper ReitzelH-Index: 1
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This study explores the under-investigated issue of groundwater-borne geogenic phosphorus (P) as the potential driving factor behind accumulation of P in lake sediment. The annual internally released P load from the sediment of the shallow, hypereutrophic and groundwater-fed lake, Norreso, Denmark, was quantified based on total P (TP) depth profiles. By comparing this load with previously determined external P loadings entering the lake throughout the year 2016–2017, it was evident that internal...
1 CitationsSource
#1Søren Jessen (UCPH: University of Copenhagen)H-Index: 10
#2Johan Onslev (UCPH: University of Copenhagen)H-Index: 4
Last.Morten Hostrup (UCPH: University of Copenhagen)H-Index: 13
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8 CitationsSource
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#1Morten Hostrup (UCPH: University of Copenhagen)H-Index: 13
#2Søren ReitelsederH-Index: 15
Last.Jens Bangsbo (UCPH: University of Copenhagen)H-Index: 72
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