Spatial and seasonal variability of particulate matter optical and size properties in the Eastern Mediterranean Sea

Karageorgis, Aristomenis P.; Georgopoulos, Dimitrios; Kanellopoulos, Theodore D.; Mikkelsen, Ole A.; Pagou, Κalliopi; Kontoyiannis, H.; Pavlidou, Alexandra; Anagnostou, Ch.

doi:10.1016/j.jmarsys.2012.07.003

Cited by 34 publications

(24 citation statements)

References 61 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In fact, evidence of recent deep water formation was found in 2008 CTD casts in the Northern Aegean Sea as presented in Karageorgis et al [2012], while a numerical simulation by Androulidakis et al [2012] showed that the period 2006-2008 was marked by dense water formation in the central Aegean mainly caused by the intrusion of saline masses of Levantine origin. The latter results show that the BSW influence on DWF in the Central Aegean played a minor role during the same period.…”

Section: Cretan Straits Exitmentioning

confidence: 99%

Dense intermediate water outflow from the Cretan Sea: A salinity driven, recurrent phenomenon, connected to thermohaline circulation changes

et al. 2014

View full text Add to dashboard Cite

Data collected from different platforms in the Cretan Sea during the 2000s decade present evidence of gradually increasing salinity in the intermediate and deep intermediate layers after the middle of the decade. The observed gradual salt transport toward the deeper layers indicates contributions of dense water masses formed in various Aegean Sea subbasins. The accumulation of these saline and dense water masses in the Cretan Sea finally led to outflow from both Cretan Straits, with density greater than typical Levantine/Cretan Intermediate water but not dense enough to penetrate into the deep layers of the Eastern Mediterranean. We name this outflowing water mass as dense Cretan Intermediate Water (dCIW). A retrospective analysis of in situ data and literature references during the last four decades shows that similar events have occurred in the past in two occasions: (a) in the 1970s and (b) during the Eastern Mediterranean Transient (EMT) onset (1987)(1988)(1989)(1990)(1991). We argue that these salinity-driven Aegean outflows are mostly attributed to recurrent changes of the Eastern Mediterranean upper thermohaline circulation that create favorable dense water formation conditions in the Aegean Sea through salinity preconditioning. We identify these phenomena as ''EMT-like'' events and argue that in these cases internal thermohaline mechanisms dominate over atmospheric forcing in dense water production. However, intense atmospheric forcing over an already salinity preconditioned basin is indispensable for creating massive deep water outflow from the Cretan Sea, such as the EMT event.

show abstract

Section: Cretan Straits Exitmentioning

confidence: 99%

Dense intermediate water outflow from the Cretan Sea: A salinity driven, recurrent phenomenon, connected to thermohaline circulation changes

et al. 2014

View full text Add to dashboard Cite

show abstract

“…In the Cretean Sea (Eastern Mediterranean) Karageorgis et al (2012) observed a PSD dominated by particles of size around 60-80 µm identified as microflocs. Spring TPV1,25-250 was generally 6-10 µL L −1 in 0-15 m, and was < 1 µL L −1 in deep water.…”

Section: Particle Pools Seen By the Lisst: Comparison With Other Studiesmentioning

confidence: 99%

Combining laser diffraction, flow cytometry and optical microscopy to characterize a nanophytoplankton bloom in the Northwestern Mediterranean

LeRoux

Grégori

Leblanc

et al. 2018

Progress in Oceanography

View full text Add to dashboard Cite

show abstract

“…Karageorgis et al . [] also reported significant spatial and seasonal variability in particulate matter abundance (or concentration) and size distributions in the Eastern Mediterranean Sea. The objective of this study is to characterize PSD spatial variability, at both horizontal and vertical scales, and examine relationships with phytoplankton assemblages in a large sub‐arctic sea, Hudson Bay, Canada.…”

Section: Introductionmentioning

confidence: 99%

Characterization and variability of particle size distributions in Hudson Bay, Canada

Larouche

Tang

et al. 2014

JGR Oceans

View full text Add to dashboard Cite

Particle size distribution (PSD) plays a significant role in many aspects of aquatic ecosystems, including phytoplankton dynamics, sediment fluxes, and optical scattering from particulates. As of yet, little is known on the variability of particle size distribution in marine ecosystems. In this study, we investigated the PSD properties and variability in Hudson Bay based on measurements from a laser diffractometer (LISST-100X Type-B) in concert with biogeochemical parameters collected during summer 2010. Results show that most power-law fitted PSD slopes ranged from 2.5 to 4.5, covering nearly the entire range observed for natural waters. Offshore waters showed a predominance of smaller particles while near the coast, the effect of riverine inputs on PSD were apparent. Particulate inorganic matter contributed more to total suspended matter in coastal waters leading to lower PSD slopes than offshore. The depth distribution of PSD slopes shows that larger particles were associated with the pycnocline. Below the pycnocline, smaller particles dominated the spectra. A comparison between a PSD slope-based method to derive phytoplankton size class (PSC) and pigment-based derived PSC showed the two methods agreed relatively well. This study provides valuable baseline information on particle size properties and phytoplankton composition estimates in a sub-arctic environment subject to rapid environmental change.

show abstract

Spatial and seasonal variability of particulate matter optical and size properties in the Eastern Mediterranean Sea

Cited by 34 publications

References 61 publications

Dense intermediate water outflow from the Cretan Sea: A salinity driven, recurrent phenomenon, connected to thermohaline circulation changes

Dense intermediate water outflow from the Cretan Sea: A salinity driven, recurrent phenomenon, connected to thermohaline circulation changes

Combining laser diffraction, flow cytometry and optical microscopy to characterize a nanophytoplankton bloom in the Northwestern Mediterranean

Characterization and variability of particle size distributions in Hudson Bay, Canada

Contact Info

Product

Resources

About