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2024 | OriginalPaper | Buchkapitel

Particulate Matter Spatial, Temporal Distribution and Size Properties in the Aegean Sea

verfasst von : A. P. Karageorgis, V. C. Metheniti, S. P. Chaikalis, W. D. Gardner, Th. Kanellopoulos, O. Mikkelsen, N. Kampanis, S. Sofianos, Ch. Anagnostou

Erschienen in: The Aegean Sea Environment

Verlag: Springer International Publishing

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Abstract

An extensive collection of light transmission/beam attenuation coefficient vertical profiles (LT/c_p), particulate matter concentration (PMC) and particulate organic carbon concentration (POC), total particle volume concentration (VC), and particle median diameter (D₅₀) vertical profiles were assembled in order to provide an overview of particulate matter dynamics in the Aegean Sea, as well as a first time assessment of suspended particle size properties. A typical beam c_p vertical profile is composed of a relatively more turbid surface nepheloid layer (SNL) associated with enhanced primary productivity and atmospheric/fluvial inorganic/organic particle inputs, more transparent mid-waters with the sporadic occurrence of intermediate nepheloid layers (INL), and occasionally a more turbid bottom nepheloid layer (BNL) attributed to seabed sediment resuspension. The Aegean Sea is characterized by very low c_p values, apart from river discharge coastal regions of the North Aegean Sea. In a north-south direction, c_p decreases, and the water column becomes progressively more transparent, highlighting the transition from meso/oligo- to ultra-oligotrophic conditions prevailing in the Aegean Sea. There is a clear differentiation of particle abundance between “wet” and “dry” seasons, with the former showing enhanced c_p, PMC, POC, and VC values. Particle size, studied within the range 1.25–250 μm, exhibits relatively small variability, with D₅₀ varying between 81 and 105 μm, with a general increase over depth which is more pronounced in the South Aegean Sea, most likely associated with the variable abundance of Transparent Exopolymer Particles (TEP). Deep basins of the North Aegean Sea host permanent/semi-permanent INLs at mid-depths; their presence is attributed to internal wave activity. Good correlations of c_p:PMC and c_p:POC allow for the conversion of c_p data to PMC and POC values, in support of modeling and remote sensing applications.

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Vorheriges Kapitel Ιnsights into the Nutrients and Carbon Pools and Dynamics in the Aegean Sea

Nächstes Kapitel Seabed Sedimentology and Elemental Geochemistry of the Aegean Sea

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Titel: Particulate Matter Spatial, Temporal Distribution and Size Properties in the Aegean Sea
verfasst von: A. P. Karageorgis
V. C. Metheniti
S. P. Chaikalis
W. D. Gardner
Th. Kanellopoulos
O. Mikkelsen
N. Kampanis
S. Sofianos
Ch. Anagnostou
Verlag: Springer International Publishing
Buch: The Aegean Sea Environment
Print ISBN: 978-3-031-53796-7

Electronic ISBN: 978-3-031-53797-4

Copyright-Jahr: 2024
DOI: https://doi.org/10.1007/698_2022_899