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CTD CASTS AND WATER SAMPLING

CTD and rosette sampling casts were taken on surveyed area. Conductivity (SBE-4,3x10$^{-4}$ S/m initial accuracy), temperature (SBE-3/F, 1.0x10$^{-3}$ °C) and oxygen (SBE-13, 4.3x10$\mu \lambda$l$^{-1}$), PAR (depth $<$ 1000m), light transmission and fluorimetry data were collected by a Seabird SBE 11 PLUS using the SEASAVE V5.33 software. The pressure data were measured by a ParoScientific Digiquartz (0-6000m, accuracy 0.1%). Data were acquired at 24Hz and the descent rate was aproximately 1 m/s, much less when close to bottom or on interesting interfaces.

The conversion from pressure to depth on the SEA-SAVE software was done at latitude 41N. The WHOI-UNESCO package was also used for converting to the 42N for comparison. A General Oceanics rosette sampler with 24 10l capacity Niskin bottles was employed for water sampling. DGPS NMEA Position data were interfaced directly to the CTD acquisition systems.

The position of the CTD stations together with some relevant data are reported in Tables 5, and can be viewed in Fig. 2, 3 and 4.

The recorded data were converted to the CNV and ASCIIOUT (for CTD) formats and further plotted with the ODV software [Schlitzer(2004)]. The Sound Velocity data from the acquired profiles were made available for import into the PDS-2000 software for multibeam data corrections.

Oxygen data on the water samples were verified by Winkler titration method.

The slow-descending, free fall Profiler II Ocean profiler by SATLANTIC was used for hyperspectral investigation on upper water column.

UNITUS's T-FLAP, a new launchable probe developed to perform temperature and fluorescence profiles was tested diring the cruise. Five of them were launched in order to study sensors response, at different trophic conditions.

Two special T-FLAP were launched to verify the hydrodynamic behavior in the water column: these probes were equipped with three-axial-accelerometers, pressure transducer, gyroscope. Table 6 shows the launch data. Chlorophyll a, TSM and CDOM samples were taken from the CTD bottles at different depths, in order to calibrate probe measures.

During the launch communication problems occurred to the 2 special T-FLAP: we acquired data till 13m depth.

Table 4 shows the oceanographic instrumentation used, recovered and deployed during the Cruise.


Table 4: Oceanographic instrumentation on Cruise ADR02_08 .
Instrument Property of Serial number Calibration Date
Rosette Water Sampler 24 bottles Urania    
CTD SBE 911 plus Urania    
AANDERAA weather pack Urania    
Primary temperature OGS 1717 2008-07-01
Primary conductivity OGS 3442 2008-07-01
Secondary temperature R/V URANIA 4440 2008-02-02
Secondary conductivity R/V URANIA 3172 2008-02-02
SPAR R/V URANIA 6279 2008-06-27
fluorometer Chelsea Aquatracka III R/V URANIA 065600-001 2007-10-12
Transmiss. Chelsea/Seatech/Wetlab CStar R/V URANIA 954DR 2006-03-30
Oxygen SBE43 R/V URANIA 1029 2008-02-23
Oxygen SBE43 R/V URANIA 0078 2005-12-23
Datasonics Altimeter R/V URANIA 43697  
DOSIMAT 665 METROHM CNR-ISMAR Ancona 4M7/388  
716 DMS TITRINO METROHM CNR-ISMAR Ancona    
760 Sampler METROHM CNR-ISMAR Ancona    
CDOM Perkin Elmer Spectrophotometer CNR-ISMAR Ancona    
CDOM filtration apparatus CNR-ISMAR Ancona    
TSM filtration apparatus CNR-ISMAR Ancona    
Chlorophyll-a filtration apparatus UNITUS    
T-FLAP expendable probes UNITUS    
Chlorophyll-a filtration apparatus St.Zool."A.Dohrn" Napoli    
HPLC filtration apparatus St.Zool."A.Dohrn" Napoli    
SATLANTIC optical profiler St.Zool."A.Dohrn" Napoli    
Sediment traps CNR-ISMAR Bologna    
MOORING INSTRUMENTATION OGS    


Basically, three types of CTD-casting were defined: SW) Sea-water column measurement, BT) Sea-water column measurement and sampling, OM) optical measurements with CTD PAR, SATLANTIC hyperspectral profiler and T-FLAP expendable probes.

Different tasks were accomplished on board by any group and specific sample-collection procedures were established according to widely accepted schemes.

Water samples were filtrated immediately upon collection, and some analysis were performed onboard, i.e. O$_2$ and CDOM. The samples were stored in refrigerator at 4 and -20 for analysis at the labs (among them TSM, Clorophyll and many others, see Chapter 3.4).

Table 5 shows the CTD and water sampling stations.

Table 5: CTD data from SBE files (asciiout program).
         
LON LAT STATION DATE TIME PRES(db) DEPTH(m)
1646.9500 4128.7900 C001 2008-10-17T19:42:10 107.0 106.1
1706.3400 4134.0100 C002 2008-10-17T21:49:56 452.0 448.0
1725.5700 4139.1500 C003 2008-10-18T00:08:53 1142.0 1130.0
1745.3600 4150.3500 C004 2008-10-18T07:39:48 1206.0 1193.1
1804.2600 4149.5900 C005 2008-10-18T14:54:26 1218.0 1204.9
1823.6800 4154.7000 C006 2008-10-18T18:10:11 728.0 721.0
1842.9000 4159.8400 C007 2008-10-18T20:33:30 129.0 127.9
1857.3800 4203.7300 C008 2008-10-18T22:32:33 63.0 62.5
1918.5200 4151.6100 C009 2008-10-19T10:46:16 13.0 12.9
1916.7300 4149.3300 C010 2008-10-19T12:27:16 46.0 45.6
1914.2100 4147.1100 C011 2008-10-19T13:42:19 67.0 66.5
1910.7200 4144.0500 C012 2008-10-19T14:50:29 79.0 78.4
1907.0600 4140.9700 C013 2008-10-19T15:47:03 91.0 90.3
1903.7300 4137.9900 C014 2008-10-19T17:08:54 124.0 123.0
1900.3500 4135.1000 C015 2008-10-19T18:34:01 151.0 149.8
1913.7100 4154.3100 C016 2008-10-20T06:28:03 9.0 8.9
1908.3900 4157.9700 C017 2008-10-20T07:28:08 15.0 14.9
1905.8000 4155.6100 C018 2008-10-20T08:28:00 62.0 61.5
1903.6400 4154.1700 C019 2008-10-20T10:03:34 75.0 74.4
1916.8400 4149.3100 C019 2008-10-20T11:43:17 46.0 45.6
1852.5700 4144.3300 C021 2008-10-20T14:41:48 124.0 123.0
1841.8900 4135.2800 C022 2008-10-20T16:54:44 461.0 456.9
1844.9600 4138.3600 C023 2008-10-20T19:43:06 320.0 317.3
1848.9900 4141.2500 C024 2008-10-20T20:39:53 191.0 189.4
1855.9500 4147.1700 C025 2008-10-20T21:58:42 100.0 99.2
1859.5000 4150.3100 C026 2008-10-20T22:50:36 89.0 88.3
1903.0000 4205.6600 C027 2008-10-21T05:51:17 44.0 43.6
1853.2900 4214.2400 C028 2008-10-21T07:29:58 31.0 30.8
1850.7600 4212.3700 C029 2008-10-21T08:41:05 74.0 73.4
1848.3000 4210.0900 C030 2008-10-21T09:41:49 89.0 88.3
1845.0200 4206.8500 C031 2008-10-21T10:41:23 103.0 102.2
1841.3100 4203.9700 C032 2008-10-21T11:35:59 130.0 128.9
1837.5900 4200.8900 C033 2008-10-21T13:09:17 170.0 168.6
1834.4200 4157.9100 C034 2008-10-21T14:22:32 202.0 200.3
1830.4200 4154.7900 C035 2008-10-21T15:44:23 304.0 301.4
1822.5300 4203.1500 C036 2008-10-22T06:09:19 517.0 512.3
1823.8000 4207.1500 C037 2008-10-22T07:40:36 391.0 387.6
1825.9700 4210.7100 C038 2008-10-22T08:46:01 274.0 271.7
1827.5600 4214.6900 C039 2008-10-22T09:53:09 200.0 198.3
1829.2800 4217.8500 C040 2008-10-22T11:06:58 144.0 142.8
1831.4700 4220.7500 C041 2008-10-22T12:22:14 120.0 119.0
1832.7300 4223.5000 C042 2008-10-22T13:23:43 57.0 56.5
1845.6200 4226.0700 C043 2008-10-22T15:52:21 20.0 19.8
1844.4300 4228.5500 C044 2008-10-22T16:48:23 30.0 29.8
1843.2800 4228.8000 C045 2008-10-22T17:43:20 60.0 59.5
1839.5000 4225.9300 C046 2008-10-22T19:21:53 36.0 35.7
1832.5700 4226.2900 C047 2008-10-22T20:15:02 38.0 37.7
1829.1300 4217.7600 C048 2008-10-23T07:47:40 167.0 165.6
1831.1900 4221.1000 C049 2008-10-23T09:02:50 120.0 119.0
1832.8200 4223.5200 C050 2008-10-23T10:18:30 58.0 57.5
1832.6400 4226.3500 C051 2008-10-23T11:53:58 38.0 37.7
1840.5600 4229.7900 C052 2008-10-23T14:48:42 855.0 846.5
1838.8100 4226.6100 C053 2008-10-23T19:29:59 29.0 28.8
1924.8800 4127.2300 C054 2008-10-24T07:45:27 9.0 8.9
1920.1900 4127.2100 C055 2008-10-24T08:40:36 44.0 43.7
1916.7100 4127.4200 C056 2008-10-24T09:47:39 84.0 83.3
1911.2800 4127.2900 C057 2008-10-24T11:00:06 123.0 122.0
1900.6600 4127.2100 C059 2008-10-24T12:53:20 122.0 121.0
1855.3800 4127.3700 C060 2008-10-24T13:57:30 191.0 189.4
1849.9800 4127.0700 C061 2008-10-24T15:15:48 322.0 319.2
1745.7400 4150.2000 C062 2008-10-25T16:31:03 1210.0 1197.0
1912.8000 4137.8400 C063 2008-10-26T07:50:54 84.0 83.3
1918.0400 4138.0000 C064 2008-10-26T09:08:53 62.0 61.5
1923.5700 4138.1300 C065 2008-10-26T10:18:44 38.0 37.7
1927.6500 4137.9300 C066 2008-10-26T11:59:07 29.0 28.8
1931.7800 4137.9600 C067 2008-10-26T12:53:23 20.0 19.8
1925.4100 4150.6000 C069 2008-10-26T15:30:42 1.0 1.0


Table 6: T-FLAP launches during Cruise ADR02_08 R/V Urania along Dubrovnik-Bari transect.
T-FLAP STATION COMMENT
651 ADR02_004 (Special T-FLAP)
652 ADR02_004 (Special T-FLAP)
613 ADR02_069 (ADRICOSM 1-5)
625 ADR02_070 (AM9)
611 ADR02_072 (AM7)
621 ADR02_075 (AM5)
628 ADR02_078 (AM2)



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Next: BOTTOM SAMPLING Up: OVERVIEW OF OCEANOGRAPHICAL SAMPLING Previous: OVERVIEW OF OCEANOGRAPHICAL SAMPLING   Contents
root 2009-01-11