Hydrological profiles in the Mediterranean Sea (2002 - 2006)

Date 2019-11-18
Temporal extent 2002-01-11 -2006-10-25
Author(s) Ribotti AlbertoORCID1, Perilli AngeloORCID1, Sorgente RobertoORCID1, Borghini MirenoORCID2
Contributor(s) Vallerga Silvana, Di Bitetto MassimilianoORCID
Affiliation(s) 1 : CNR, IAS (Institute for the study of Anthropic impacts and Sustainability in marine environment), Oristano (Italy)
2 : CNR, ISMAR (Institute of Marine Sciences), La Spezia (Italy)
DOI 10.17882/70340
Publisher SEANOE
Keyword(s) hydrological data, Gibraltar Strait, CTD profiles, Mediterranean Sea, water masses
Abstract

Hydrological data have been collected during 9 oceanographic cruises, named medgoos, organized in the whole Mediterranean basin between November 2002 and October 2006 (table 1) by the Italian National Research Council (CNR). The three medgoos cruises numbered from 5 to 7 are already part of another database (Ribotti et al., 2019) just covering the Sardinia Channel and Sea. Here they are complete.

Like in the previous medgoos cruises (Ribotti et al., 2019), also for these the 61,30 meters long R/V Urania of CNR was used. Data of conductivity, temperature, dissolved oxygen (DO) and Chlorophyll-a fluorescence (Chl-a, apart during the medgoos11 cruise) were acquired by sensors installed on a SBE911 plus CTD probe (Sea-Bird Inc.). It was equipped with a 24 Niskin bottle rosette for water column samples collection. The vertical profiles of all parameters were obtained by sampling the signals at 24 Hz, with the CTD/rosette going down at a speed of 1 m/s. On board the CTD data were quality checked and processed by Seasoft software, and the coarse errors corrected. Then the salinity was checked against the on-board analyses of water samples by a Guildline-Autosal salinometer. The same for DO data checked against Winkler titration analyses. Chl-a data were not calibrated, so they are reported as Relative Fluorescence Unit. During cruises from medgoos5 to 7 acquired temperature data were checked at defined depths against inverted thermometers installed in correspondence of the Niskin bottles number 1, 3, 5, 7 of the rosette sampler. Pre-cruise and post-cruise calibrations of the sensors were performed at the SACLANT Center (now NATO-CMRE) of La Spezia (Italy). Redundant sensors were often used for both temperature and salinity measurements. The vessel was positioned using an integrated navigation system consisting of two DGPS antennas managed by Andrews Hydrographics software installed on HP 386, 33 MHz PCs. The data set is provided per cruise as Ocean Data View (ODV, Schlitzer R., 2019) Spreadsheet files in TXT format where missing data values are set to -1.e10.

MetaVariable


  • Cruise name

  • Station

  • Type of acquisition (here C)

  • Date in mon/day/yr and Time in hh:mm

  • Longitude [degrees_east]

  • Latitude [degrees_north]

  • Bot. Depth [m]

DataVariable (not always in the following order)


  • Pressure, Digiquartz [db]

  • Temperature [deg C]; ITS-68, also ITS-90 just in medgoos5

  • Conductivity [mS/cm]

  • Oxygen, SBE43 [ml/l]

  • Fluorescence, Seatech in medgoos5, 6, 7, 8, 9, 10

Licence CC-BY
Utilisation These data are published without any warranty: the user assumes all risk arising from his/her use of these data. These data are intended to be quality controlled, but it is possible that they contain errors. It is the unique responsibility of the user to assess if the data are appropriate for his/her use, and to interpret them accordingly. We welcome users to ask questions and report problems to the contact addresses listed in the data files.
Acknowledgements The data used in this work have been collected in the framework of several national and European projects, i.e. the Italian MIUR project SIMBIOS (Operative Programme of the Marine Environment Plan, Cluster C10, Project n. 13 – D.n. 778.RIC); the EU Marie Curie Host Fellowship ODASS (HPMD-CT-2001-00075); the EU MAMA (EVR1-CT-2001-20010), the EU MFSTEP (EVK3-CT-2002-00075), the EU SESAME (VI FP; contract n 036949), the Italian MIUR project REMA (Ricerca integrata sugli Ecosistemi Marini e l’Ambiente, 2002- 2006). We thank captains and crews on R/V Urania for their essential support on board.
Sensor metadata

In specific, used CTD sensors had the following characteristics:

  • pressure: a Digiquarz 4000 pressure transducer was used. The transducer had a resolution of 0.01 ppm, oscillator frequency 34 KHz - 38KHz and temperature range 0 °C - 125 °C;
  • temperature: a SBE-3/F thermometer with response time of 70 ms, temperature range -5 ° - + 35 °, accuracy about 0.004 ° C per year, resolution 0.0003 ° C;
  • conductivity: a SBE-4 sensor with a range of 0.0 - 7 S/m, resolution 3 x 10-4 S/m, accuracy about 0.0003 S/m per month and response time of 0.085 sec with pump or  0.17 sec without pump;
  • dissolved oxygen: a SBE-13 Beckman/YSI sensor with a range of 0 - 15 ml/l, accuracy of 0.1 ml/l, resolution 4.3 μM and response time 2 sec at a temperature of 25 °C during cruises medgoos1, 2, 3, 4. During cruises medgoos5, 6, 7 a SBE-43 polarographic membrane sensor for pumped CTD applications with titanium (7000 m) housing was used with a range of 120% of surface saturation in all natural waters, accuracy of ±2% of saturation
  • fluorescence: a Sea Tech Inc. fluorometer with energy emitted by the flash lamp of 0.25 J for flash, temperature range 0 ° - 25 °C, resolution 0.15 mg/l. Since medgoos12 the Chelsea Aqua 3 fluorometer was used. It is not present in the data of medgoos11 due to sensor malfunction.
Data
File Size Format Processing Access
Compressed dataset with map and ocean data from the cruise medgoos5 786 KB TEXTE Processed data Open access
Compressed dataset with map and ocean data from the cruise medgoos6 1 MB TEXTE Processed data Open access
Compressed dataset with map and ocean data from the cruise medgoos7 1 MB TEXTE Processed data Open access
Compressed dataset with map and ocean data from the cruise medgoos8 1 MB TEXTE Processed data Open access
Compressed dataset with map and ocean data from the cruise medgoos9 1 MB TEXTE Processed data Open access
Compressed dataset with map and ocean data from the cruise medgoos10 1 MB TEXTE Processed data Open access
Compressed dataset with map and ocean data from the cruise medgoos11 386 KB TEXTE Processed data Open access
Compressed dataset with map and ocean data from the cruise medgoos12 1 MB TEXTE Processed data Open access
Compressed dataset with map and ocean data from the cruise medgoos13 1 MB TEXTE Processed data Open access
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How to cite 

Ribotti Alberto, Perilli Angelo, Sorgente Roberto, Borghini Mireno (2019). Hydrological profiles in the Mediterranean Sea (2002 - 2006). SEANOE. https://doi.org/10.17882/70340