Material transport from the nearshore to the basinal environment in the Southern Baltic Sea,II: Origin and properties of material. sub group 3a

C Christiansen, K Edelvang, K Emeis, S Jähmlich, J Kozuch, M Laima, T Leipe, A Löffler, L C Lund-Hansen, A Miltner, K Pazdro, J Pempkowiak, Graham B Shimmield, Tracy Shimmield, Jason Smith, M Voss, G Witt

Research output: Contribution to journalArticle

54 Citations (Scopus)

Abstract

Processes involved in erosion, transport and deposition of cohesive materials are studied in a transect from shallow (16 m) to deep (47 m) water of the SW Baltic Sea. The wave- and current-induced energy input to the seabed in shallow water is high with strong variability and suspended matter concentrations may double within a few hours. Primary settling fluxes (from sedimentation traps) are less than 10 g m (-2) day (-1), whereas resuspension fluxes (evaluated from sedimentation flux gradients) are 15-20 times higher and the residence time for suspended matter in the water column is 1-2 days. Settling velocities of aggregates are on average six times higher than for individual particles resulting in an enhanced downward transport of organic matter. Wave-induced resuspension (four to six times per month) takes place with higher shear stresses on the bottom than current-induced resuspension (three to five times per month). The short residence time in the water column and the frequent resuspension events provide a fast operating benthic-pelagic coupling. Due to the high-energy input, the shallow water areas are nondepositional on time scales longer than 1-2 weeks. The sediment is sand partly covered by a thin fluff layer during low-energy periods. The presence of the fluff layer keeps the resuspension threshold very low (
Original languageEnglish
Pages (from-to)151-168
Number of pages18
JournalJOURNAL OF MARINE SYSTEMS
Issue number5
DOIs
Publication statusPublished - 2002

Keywords

  • Geosciences, Multidisciplinary
  • DYNAMICS
  • SETTLING VELOCITY
  • Marine & Freshwater Biology
  • SATELLITE DATA
  • POMERANIAN-BIGHT
  • Oceanography
  • BENTHIC BOUNDARY-LAYER
  • ODER RIVER
  • WATER
  • INSTRUMENT
  • SEDIMENT RESUSPENSION
  • CONTINENTAL-MARGIN

Fingerprint Dive into the research topics of 'Material transport from the nearshore to the basinal environment in the Southern Baltic Sea,II: Origin and properties of material. sub group 3a'. Together they form a unique fingerprint.

Cite this