A physical-biochemical model of plankton productivity and nitrogen cycling in the Black Sea

Date

1999-04-01

Author

Oguz, T
Ducklow, HW
Malanotte-Rizzoli, P
Murray, JW
Shushkina, EA
Vedernikov, VI
Unluata, U

Metadata

Show full item record

This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

Item Usage Stats

206
views

0
downloads

A one-dimensional, vertically resolved, physical-biochemical upper ocean model is utilized to study plankton productivity and nitrogen cycling in the central Black Sea region characterized by cyclonic gyral circulation. The model is an extension of the one given by Oguz et al. (1996, J, Geophys. Res. 101, 16585-16599) with identical physical characteristics but incorporating a multi-component plankton structure in its biological module, Phytoplankton are represented by two groups, typifying diatoms and flagellates, Zooplankton are also separated into two groups: microzooplankton (nominally <200 mu m) and mesozooplankton (0.2-2 mm), The other components of the biochemical model are detritus and nitrogen in the forms of nitrate and ammonium. The model incorporates, in addition to plankton productivity and organic matter generation, nitrogen remineralization (ammonification) and ammonium oxidation (nitrification) in the water column. Numerical simulations ape described and compared with the available data from the central Black Sea. The main seasonal and vertical characteristics of phytoplankton and nutrient dynamics inferred from observations appear to be reasonably well represented by the model. Fractionation of the biotic community structure is shown to lead to increased plankton productivity during the summer period following the diatom-based early spring (March) bloom. The annual nitrogen budget for the euphotic zone reveals the substantial role of recycled nitrogen in the surface waters of the Black Sea.

Subject Keywords

Ecosystem model, Mixed layer, Ocean, Variability

URI

https://hdl.handle.net/11511/68400

Journal

DEEP-SEA RESEARCH PART I-OCEANOGRAPHIC RESEARCH PAPERS

DOI

https://doi.org/10.1016/s0967-0637(98)00074-0

Collections

Graduate School of Marine Sciences, Article

Suggestions

OpenMETU
Core

A Coupled modelling attempt of hydrodynamics and ecosystem of northern levantine basin Aydoğdu, Ali; Salihoğlu, Barış; Cannaby, Heather Anne; Department of Physical Oceanography (2012) A three-dimensional ocean model, ROMS, has been utilized to simulate the hydrodynamics and the ecosystem dynamics of the Northern Levantine Basin circulation. The model is one-way nested inside a coarser resolution Mediterranean Sea eco-hydrodynamics model, forced with realistically updated surface and lateral fluxes of momentum, mass, heat and nutrients. Scenario runs representing present and future time-slices of 5 years each have been used to investigate sensitivity to climate in the near future. Other s...
Modeling the impact of tidal flows on the biological productivity of the Alboran Sea Sanchez-Garrido, Jose C.; Naranjo, C.; Macias, D.; Garcia-Lafuente, J.; Oguz, T. (2015-11-01) The control of phytoplankton production by tidal forcing in the Alboran Sea is investigated with a high-resolution ocean circulation model coupled to an ecosystem model. The aim of the modeling efforts was to elucidate the role of tides in sustaining the high biological productivity of the Alboran Sea, as compared with the rest of the Mediterranean subbasins. It is shown that tidal forcing accounts for an increase of phytoplankton biomass and primary productivity in the basin of about 40% with respect to a ...
Evaluation of Multiple Satellite-Based Precipitation Products over Complex Topography DERIN, Yagmur; Yılmaz, Koray Kamil (American Meteorological Society, 2014-08-01) This study evaluates the performance of four satellite-based precipitation (SBP) products over the western Black Sea region of Turkey, a region characterized by complex topography that exerts strong controls on the precipitation regime. The four SBP products include the Tropical Rainfall Measuring Mission (TRMM) Multisatellite Precipitation Analysis version 7 experimental near-real-time product (TMPA-7RT) and post-real-time research-quality product (TMPA-7A), the Climate Prediction Center morphing technique...
A new boundary element formulation for wave load analysis Yalcin, O. Fatih; Mengi, Yalcin (Springer Science and Business Media LLC, 2013-10-01) A new boundary element (BEM) formulation is proposed for wave load analysis of submerged or floating bodies. The presented formulation, through establishing an impedance relation, permits the evaluation of the hydrodynamic coefficients (added mass and damping coefficients) and the coefficients of wave exciting forces systematically in terms of system matrices of BEM without solving any special problem, such as, unit velocity or unit excitation problem. It also eliminates the need for scattering analysis in ...
Simulation of surface waves generated by a rapid rise of a block at the sea bottom Şenol, Nalan; Aydın, İsmail; Department of Civil Engineering (2005) A mathematical model is developed for investigating time dependent surface deformations of a hydrostatic water volume, when it is subjected to a sudden partial rise of the sea bottom. In the model, 2-dimensional, compressible, and viscous Navier-Stokes equations are solved by Marker and Cell (MAC) method. Variable mesh size in both horizontal and vertical directions with a staggered grid arrangement is used. Limited compressibility model is utilized for pressure. Various computational tests are done for the...

Citation Formats

T. Oguz et al., “A physical-biochemical model of plankton productivity and nitrogen cycling in the Black Sea,” DEEP-SEA RESEARCH PART I-OCEANOGRAPHIC RESEARCH PAPERS, pp. 597–636, 1999, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/68400.