Transport and distribution of nutrients and chlorophyll-a by mesoscale eddies in the northeastern Mediterranean

Date

1990-1

Author

Salihoǧlu, İ
Saydam, C
Baştürk, Ö
Yilmaz, K
Göçmen, D
Hatipoǧlu, E
Yilmaz, A

Metadata

Show full item record

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

Item Usage Stats

144
views

0
downloads

The distribution of nutrient elements and chlorophyll-a in the Northern Levantine Basin (NLB) were investigated in some detail and are discussed together with the physical aspects of the region in the present study. The surface circulation pattern of the NLB was studied and the structure of the relatively large-scale Rhodes cyclonic gyre, which is located between Rhodes and Cyprus, was investigated for the same time period. The most important characteristics of this cyclonic gyre are the upwelling of nutrient-rich deep waters within the gyre and the reverse phenomenon at the peripheries. Anticyclonic circulation systems generally surround the Rhodes cyclonic gyre; the permanent ones are located in the southern part of the Rhodes gyre, in the Cilician Basin, and off İskenderun Bay. The vertical distribution of nutrients in the water column shows completely reversed trends and the nutrient gradient ranges between 300–400 m in the central parts of the anticyclonic systems. Thus downwelling processes also occur in the NLB and the formation of Levantine Intermediate Water (LIW) observed in the NLB matches the chemical data presented here. This special vertical and spatial distribution of nutrients affects the distribution of the phytoplankton population, as the patches of primary producers are aggregated in the central parts of the Rhodes gyre. This is confirmed by the chlorophyll-a data and the unexpected content of neuston net collection in the same region. The concentration of chlorophyll-a was relatively high at offshore stations, such as in the central parts of the cyclonic gyres, where zooplankton, small shrimp and fish larvae, etc., were observed in large quantities.

Subject Keywords

General Chemistry, Oceanography, Water Science and Technology, Environmental Chemistry

URI

https://hdl.handle.net/11511/51479

Journal

Marine Chemistry

DOI

https://doi.org/10.1016/0304-4203(90)90024-7

Collections

Graduate School of Marine Sciences, Article

Suggestions

OpenMETU
Core

Enrichment of metals in the surface sediments of Sapanca Lake Bakan, G; Balkas, TI (Wiley, 1999-01-01) A comprehensive lake sediment study was performed on the Sapanca Lake of Turkey in which certain metal analyses were conducted using inductively coupled plasma atomic emission spectroscopy. The purpose of the study was to find the enrichment of metals in the surface sediments of Sapanca Lake. A method, namely, the index of geoaccumulation, was used to define the degree of anthropogenic pollution in the Sapanca Lake basin. Results of the geoaccumulation index indicate that only enrichments of trace metals, c...
The chemical composition of Black Sea suspended particulate organic matter pyrolysis GC MS as a complementary tool to traditional oceanographic analyses Coban Yıldız, Yesim; Chiavari, D; Fabbri, D; Yılmaz, Ayşen; Tuğrul, Süleyman (Elsevier BV, 2000-03-01) A “traditional” description of the abundance and chemical composition of suspended particulate organic matter (POM) in open and coastal waters of the southern Black Sea in June 1996 has been confirmed and extended by pyrolysis–gas chromatography/mass spectrometry (Py-GC/MS) analyses. Py-GC/MS provided depth profiles of the relative concentrations of twenty three marker compounds characteristic of chlorophylls (CHL), lipids, carbohydrates (CBH) and proteins produced by thermal degradation of the POM retained...
ORGANIC-CARBON DISTRIBUTION IN THE SURFACE SEDIMENTS OF THE SEA-OF-MARMARA AND ITS CONTROL BY THE INFLOWS FROM ADJACENT WATER MASSES ERGIN, M; BODUR, MN; EDIGER, D; EDIGER, V; YILMAZ, A (Elsevier BV, 1993-02-01) The organic carbon contents and textural composition of a total of 166 surficial sediment samples (from 10 to 1226 m water depths) together with data on primary productivity rates and dissolved oxygen concentrations have been studied to investigate the main controls on the distribution of organic carbon buried within the modern sediments across the Sea of Marmara.
Distribution of tin in the northeastern Mediterranean Yemeni̇ci̇ğlu, Semal; Saydam, Cemal; Sali̇hoğlu, İlkay (Elsevier BV, 1987) Concentrations of tin, one of the naturally methylated elements, was determined in sea water, sediments and organisms, collected from the Northeastern Mediterranean. A hydride generation technique was employed, in which the tin and methyltin, were converted to their hydrides. The hydrides produced were detected by atomic absorption spectrophotometer. On the average, the inorganic tin content of sea water samples ranged between 1.1–236 ng/1. Although the dominant methyltin species was dimethyltin, all forms ...
Reduction of volatile halocarbons in anoxic seawater, results from a study in the Black Sea Tanhua, T; Fogelqvist, E; Basturk, O (Elsevier BV, 1996-09-01) The Black Sea is characterised by an oxic surface water layer and anoxic deep water rich in both hydrogen sulphide and methane, and in between a suboxic zone with very low concentrations of both oxygen and hydrogen sulphide. This makes the Black Sea a useful site for the study of oxidation-reduction reactions in seawater. In this study, the distributions of tetrachloromethane, trichloromethane, 1,1,1,-trichloroethane, dibromomethane, dibromochloromethane and bromodichloromethane across the oxic-anoxic inter...

Citation Formats

İ. Salihoǧlu et al., “Transport and distribution of nutrients and chlorophyll-a by mesoscale eddies in the northeastern Mediterranean,” Marine Chemistry, pp. 375–390, 1990, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/51479.