The impact of alternative nutrient kinetics and computational grid size on model predicted primary production and hypoxic area in the northern Gulf of Mexico
| Autor: | Timothy J. Feist, John C. Lehrter, Richard M. Greene, James J. Pauer, Brenda Rashleigh, Wilson Melendez, Lisa L. Lowe |
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| Jazyk: | angličtina |
| Rok vydání: | 2020 |
| Předmět: |
0106 biological sciences
geography Environmental Engineering River delta geography.geographical_feature_category 010504 meteorology & atmospheric sciences Grid size 010604 marine biology & hydrobiology Ecological Modeling Soil science 01 natural sciences Article Nutrient Management implications Settling Environmental science Production (economics) Voltage droop Sensitivity analyses Software 0105 earth and related environmental sciences |
| Zdroj: | Environ Model Softw |
| Popis: | Model structure uncertainty is seldom calculated because of the difficulty and time required to perform such analyses. Here we explore how a coastal model using the Monod versus Droop formulations and a 6 km × 6 km versus 2 km × 2 km computational grid size predict primary production and hypoxic area in the Gulf of Mexico. Results from these models were compared to each other and to observations, and sensitivity analyses were performed. The different models fit the observations almost equally well. The 6k-model calculated higher rates of production and settling, and especially a larger hypoxic area, in comparison to the 2k-model. The Monod-based model calculated higher production, especially close to the river delta regions, but smaller summer hypoxic area, than the model using the Droop formulation. The Monod-based model was almost twice as sensitive to changes in nutrient loads in comparison to the Droop model, which can have management implications. |
| Databáze: | OpenAIRE |
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