SPATIAL ESTIMATION OF NUTRIENT DISTRIBUTIONS IN THE GULF OF RIGA SEDIMENTS USING COKRIGING

Citation
A. Danielsson et al., SPATIAL ESTIMATION OF NUTRIENT DISTRIBUTIONS IN THE GULF OF RIGA SEDIMENTS USING COKRIGING, Estuarine, coastal and shelf science, 46(5), 1998, pp. 713-722
Citations number
34
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Oceanografhy,"Marine & Freshwater Biology
ISSN journal
0272-7714
Volume
46
Issue
5
Year of publication
1998
Pages
713 - 722
Database
ISI
SICI code
0272-7714(1998)46:5<713:SEONDI>2.0.ZU;2-H
Abstract
Basinwide mass budgets and models are important tools in coastal zone analysis. Sediments play an important role, as storage, in the nutrien t dynamics of these relatively shallow regions. Due to economic and pr actical reasons, sediment sampling is often made rather sparsely and i rregularly. Most interpolation methods are therefore not suitable, as they demand a great deal of data sampled on a regular grid. Cokriging is a method that, at least in some part, overcomes these drawbacks. Fr om a monitoring point of view it is a favourable method, as it incorpo rates information from additional variables, that may be more economic al and more frequently sampled. Estimates of spatial distribution and total amounts were carried out for organic carbon, nitrogen and phosph orus in the Gulf of Riga surficial sediments. Loss on ignition was inc luded as a covariable. Using known deposition rates on the accumulatio n bottoms, the mean sink values of these substances were estimated and compared with previous model results. For this study, the resulting t otal amounts were 1 100 000, 129 000 and 14 000 tons for carbon, nitro gen and phosphorus, respectively. This leads to an annual accumulation of 5 g C m(-2). (C) 1998 Academic Press Limited.