Nonparametric Harmonic Analysis of Estuarine Water-Quality Data: A National Estuarine Research Reserve Case Study
| Autor: | Dorset Hurley, Elizabeth L. Wenner, Don Edwards |
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| Rok vydání: | 2004 |
| Předmět: |
Hydrology
geography geography.geographical_feature_category Ecology Generalized additive model Sampling (statistics) Estuary Regression analysis Monitoring program Nonparametric regression Environmental science Semiparametric regression Water quality Earth-Surface Processes Water Science and Technology |
| Zdroj: | Journal of Coastal Research. 10045:75-92 |
| ISSN: | 1551-5036 0749-0208 |
| DOI: | 10.2112/si45-075.1 |
| Popis: | Nonparametric harmonic analysis, a new data-analytic method for deconvoluting and graphically presenting the periodic signals in water quality time-series data, is demonstrated using data from the System-Wide Monitoring Program (SWMP) of the Sapelo Island National Estuarine Research Reserve (Georgia). The analysis uses the new statistical technology known as generalized additive models, an alternative to the classical harmonic regression analysis used for centuries to model and predict tidal forcing. Generalized additive models are especially well-suited for data-rich settings in which strong and nonsinusoidal periodic signals are expected. Data from two sampling sites on Sapelo Island, Georgia, show strong and regular M2–dominated periodicities in water depth. At the Hunt Dock (HD) site, water temperature, pH, and dissolved oxygen (DO) have strong diel signatures in the summer months, but these weaken in colder months. DO and pH at this site also exhibit tidal-cycle patterns at times, particular... |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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