Sediment cores analytical data

*DATASET-NAME : Sediment cores analytical data in the Adriatic Sea, Otranto Strait and Ionian Sea.

*TIME-PERIOD : 1997 to present

*GEOGRAPHIC COVERAGE : Southern Adriatic Sea, Otranto Strait and Northern Ionian Sea

*PROJECT : MASTIII/MTPII/MATER, MAss Transfer and Ecosystem Response

*PARAMETERS : Total and organic carbon, total nitrogen, biogenic silica, and grainsize analyses on sediment samples.

*INSTRUMENTS : Sediment cores collected by means of a Multicorer. Carbon (total and organic) and Nitrogen were analysed by a Fisons NA 2000 elemental analyser. Grain size was determined by a Sedigraph 5000D (Micromeritics).

*SUMMARY : Sediment cores were collected by means of a Multicorer, and sliced into 0.5, 1, 2 cm thick sections.
Total and organic C and total N were determined by dry combustion on a CHNS elemental analyzer (Fisons NA 2000). Subsamples for organic carbon were decarbonated using 1M HCl and dried (Hedges and Stern, 1984).
Biogenic silica was extracted with 0.5 M NaOH solution at 85 C (Muller and Schneider, 1993), dissolved silica was determined spectrophotometrically (Strickland and Parsons; 1972).

Sediment grainsize
Sediment samples are first treated with Hydrogen peroxide in order to eliminate organic coatings. Grain size fraction > 63 mm (sand) is separated by wet If this fraction exceeds 5 %, further sand size class sorting is obtained by gravity settling through a sedimentation tube. The < 63 mm fraction is analysed by a Sedigraph 5000D (Micromeritics). Finest fraction is 0.025 mm diameter. Grain size composition is classified according to Shepard (1954)and referreed as sand, silt and clay percentages.

*REFERENCE :

*CENTRE :
OSSERVATORIO GEOFISICO SPERIMENTALE
Department of Oceanology
PO BOX 2011
IT-34016 TRIESTE
Italy
tel : +39 40 21401

*STORAGE-MEDIUM : Hard disk.

*AVAILABILITY : OGS, Osservatorio Geofisico Sperimentale, charged as Regional Data Center for the Adriatic/Ionian Basin. Data availability is submitted to the originator permission

*COMPLETED-BY : Stefano Miserocchi and Paola Giordani - IGM (Italy)

*ENTRY-DATE : 1999-10-13

Available Data Set(s) Processing Level
MAI2 AUG97 - Sediment cores analytical data IN VALIDATION


Last update 15/05/2000

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