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Variabilities and uncertainties in key coastal water variables as a basis for understanding changes and obtaining predictice power in modelling
Uppsala University, Disciplinary Domain of Science and Technology, Earth Sciences, Department of Earth Sciences, Air and Water Science. (Miljöanalys)
Uppsala University, Disciplinary Domain of Science and Technology, Earth Sciences, Department of Earth Sciences, Air and Water Science. (Miljöanalys)
Uppsala University, Disciplinary Domain of Science and Technology, Earth Sciences, Department of Earth Sciences.
2008 (English)In: Vatten, ISSN 0042-2886, Vol. 64, 259-272 p.Article in journal (Refereed) Published
Abstract [en]

The focus of this work is on general patterns in uncertainty as well as temporal and spatial variability in keywater variables in coastal science and management. These patterns are essential since they regulate how manysamples must be taken to get reliable mean or median values characterising coastal water quality and whichvariables are most suitable for monitoring and predictive modelling. We present results concerning coefficientsof variation, correlations, regressions, variations in data from different time periods, and confidence intervalsfor empirical mean values. We use data from Ringkøbing Fjord (Denmark, N. Europe), Chesapeake Bay(Eastern U.S.) and other coastal marine sites to illustrate the basic principles related to patterns in variability.We have shown that total and particulate N and P generally have much lower coefficients of variability (CV)than dissolved inorganic nutrient fractions. The latter are, hence, of limited use in predictive models for coastalmanagement. Total nitrogen (N) and phosphorus (P) were, on the other hand, found to be useful predictors oftwo standard bioindicators, the Secchi depth (a measure of water clarity) and chlorophyll-a concentrations(a measure of phytoplankton biomass or production)

Place, publisher, year, edition, pages
2008. Vol. 64, 259-272 p.
Keyword [en]
Variability, uncertainty, water variables, CV, predictive power, coastal areas, management
National Category
Other Earth and Related Environmental Sciences
Identifiers
URN: urn:nbn:se:uu:diva-98230OAI: oai:DiVA.org:uu-98230DiVA: diva2:173889
Projects
Thresholds, EU, 6th framework
Available from: 2009-02-18 Created: 2009-02-18 Last updated: 2017-12-13Bibliographically approved

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http://www.tidskriftenvatten.se/article.asp?articleID=3656

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Bryhn, Andreas C.Håkanson, Lars

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