River-induced particle distribution in the northwestern Black Sea (September 2002 and 2004)

A. P. Karageorgis, Vassiliki H Kourafalou, C. Anagnostou, K. P. Tsiaras, D. E. Raitsos, V. Papadopoulos, A. Papadopoulos

Research output: Contribution to journalArticle

9 Citations (Scopus)

Abstract

Observations from two comprehensive oceanographie surveys on the northwestern Black Sea are analyzed to reveal the hydrological characteristics of the shelf area around the Danube delta in relation to particulate matter dynamics. These processes have broader implications on flows through the adjacent complex strait system. The surveys cover both a period of high (September 2002) and low (September 2004) discharge of the Danube River. The resulting low-salinity waters generally occupied the upper 10-15 m within the 20-30 m thick warm layer that was separated by deeper cooler waters through a sharp thermocline. The buoyant plume was influenced by the discharge conditions and the prevailing wind patterns. The plume structure was identified using in situ bottle data, continuous beam transmission and fluorescence profiles, and satellite remotely sensed data. Particulate matter concentration values correlated with low-salinity riverine waters and their maxima were recorded in the immediate vicinity of the Danube branches, decreasing rapidly toward the open sea. The preferred particle transport pathway in 2002 was along a narrow strip near the coast, with a south-southwest direction, favored by the strong northeasterlies which predominated prior to the cruise. Low-salinity waters and riverine particles in 2004 were characterized by mostly offshore removal, attributed to calmer northwesterlies prior to the survey. Changes in ambient stratification due to wind-driven vertical displacements of the seasonal thermocline appeared to also influence the plume dynamics. The downwelling (upwelling) conditions that prevailed in 2002 (2004) were revealed in both the in situ vertical profile temperature measurements and the satellite-derived sea surface temperature patterns.

Original languageEnglish (US)
Article numberC12003
JournalJournal of Geophysical Research C: Oceans
Volume114
Issue number12
DOIs
StatePublished - Dec 8 2009

Fingerprint

rivers
salinity
plume
Rivers
plumes
thermocline
thermoclines
Particulate Matter
Water
particulate matter
river
water
particulates
Temperature distribution
Satellites
downwelling
vertical profile
straits
bottles
strait

ASJC Scopus subject areas

  • Space and Planetary Science
  • Oceanography
  • Geochemistry and Petrology
  • Geophysics
  • Earth and Planetary Sciences (miscellaneous)

Cite this

Karageorgis, A. P., Kourafalou, V. H., Anagnostou, C., Tsiaras, K. P., Raitsos, D. E., Papadopoulos, V., & Papadopoulos, A. (2009). River-induced particle distribution in the northwestern Black Sea (September 2002 and 2004). Journal of Geophysical Research C: Oceans, 114(12), [C12003]. https://doi.org/10.1029/2009JC005460

River-induced particle distribution in the northwestern Black Sea (September 2002 and 2004). / Karageorgis, A. P.; Kourafalou, Vassiliki H; Anagnostou, C.; Tsiaras, K. P.; Raitsos, D. E.; Papadopoulos, V.; Papadopoulos, A.

In: Journal of Geophysical Research C: Oceans, Vol. 114, No. 12, C12003, 08.12.2009.

Research output: Contribution to journalArticle

Karageorgis, AP, Kourafalou, VH, Anagnostou, C, Tsiaras, KP, Raitsos, DE, Papadopoulos, V & Papadopoulos, A 2009, 'River-induced particle distribution in the northwestern Black Sea (September 2002 and 2004)', Journal of Geophysical Research C: Oceans, vol. 114, no. 12, C12003. https://doi.org/10.1029/2009JC005460
Karageorgis, A. P. ; Kourafalou, Vassiliki H ; Anagnostou, C. ; Tsiaras, K. P. ; Raitsos, D. E. ; Papadopoulos, V. ; Papadopoulos, A. / River-induced particle distribution in the northwestern Black Sea (September 2002 and 2004). In: Journal of Geophysical Research C: Oceans. 2009 ; Vol. 114, No. 12.
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