BELGICA CRUISE 2009/20 - REPORT

Transcription

1 BELGICA CRUISE 2009/20 - REPORT MUMM/UG-LPAE Period: 13/07-16/07/2009 Subscribers Laurence Vigin, Dr. Michael Fettweis MUMM, Gulledelle 100, 1200 Brussels, Tel , L.Vigin@mumm.ac.be, Tel: , M.Fettweis@mumm.ac.be Dr. Patrick Roose MUMM, 3 de en 23 ste Linieregimentsplein, 8400 Oostende Tel: , P.Roose@mumm.ac.be Dries De Bock Universiteit Gent, Vakgroep Biologie, Labo PAE, Krijgslaan 281 S8, 9000 Gent Tel: , Dries.Debock@ugent.be 1

2 CONTENT 1. Cruise details 2. Participants 3. Scientific objectives 4. Operational course 5. Remarks 6. Track Plot 7. Measurements 1. CRUISE DETAILS 1. Cruise number Date / hour (local time) Zeebrugge TD: 13/07, 10h45 Zeebrugge TA: 16/07, 08h00 3. Responsible scientist 13-16/07: Michael Fettweis Participating institutions MUMM, UG-LPAE 4. Area of interest Belgian continental shelf 2. PARTICIPANTS Institute Participant 13-15/ /07 MUMM-MOMO Michael FETTWEIS* x x Joan BACKERS x x Jean-François GODART x x Jason YU x x MUMM-BELWIN Jean Pierre DE BLAUWE x x Frederic FRANCKEN x x MUMM-MONIT Daniël SAUDEMONT x Gijs COULIER UGENT-LPAE Dries DE BOCK 2 x x Ann-Eline DEBEER x TOTAL 10 6 *Chief scientist 2

3 3. SCIENTIFIC OBJECTIVES MUMM-MONIWIND (HYDRO) Op 20 februari 2008 heeft de nv Belwind een machtiging voor de bouw en een vergunning voor de exploitatie van een windmolenpark op de Bligh Bank verkregen. In dit ministerieel besluit (MB) is ook een monitoringsprogramma opgenomen om de mogelijke effecten op het marien milieu van dit windmolenpark op te volgen. In het kader van de monitoring Hydrodynamica (HYDRO) van het windmolenproject Belwind (hoofdstuk HYDRO) dienen metingen te gebeuren van de waterhoogte, stromingen en golven en de turbiditeit. Dit dient te gebeuren op drie tijdstippen, namelijk: voor de werken, tijdens de bouw van de eerste zes turbines en na de finalisatie van het volledige park. De metingen duren minimum 15 dagen en er wordt in twee zones tegelijk gemeten, namelijk op de Bligh Bank (ter hoogte van de werken) en op de Goote Bank (referentiesite). MUMM-MOMO The measurements are carried out in the framework of the MOMO project. MOMO stands for the monitoring and modelling of cohesive sediment transport and the evaluation of the effects on the marine ecosystem due to dredging and dumping operations. The primary objective of the project is the study of the cohesive sediments on the Belgian Continental Shelf (BCS) using numerical models and field measurements. The combination of monitoring and modelling will provide information on the transport processes of this fine fraction and is therefore fundamental to answer questions on composition, origin and residence of it on the BCS, the change in characteristics of this sediment due to dredging and dumping operations, the effects of the natural variability, the impact on the marine ecosystem especially due to alterations of habitats, the estimation of the net input of hazardous substances in the marine environment and the possibilities to reduce these last two items MUMM-MONIT Monitoring en evaluatie van de kwaliteit van het mariene milieu in de zone van het BCP in het kader van nationale (WFD) en internationale verplichtingen (het Joint Assessment en Monitoring Programme (JAMP)) en andere. (monitoring van het milieu i.v.m. diverse impacten o.a. zand- en grindexploitaties en baggeractiviteiten). Dit programma behelst de bepaling van nutriënten, temperatuur, gesuspendeerde stoffen, TOC en POC, chlorofyl a, faeofytine, en optische parameters in de waterkolom, evenals de bepaling van de biomassa en soortensamenstelling van fytoplankton en benthische organismen. Binnen dit project wordt een grote nadruk gelegd op kwaliteitsborging en controle zowel tijdens de staalname als in het laboratorium. LPAE DeBock (Ugent) This proposal concerns the implementation of the phytoplankton monitoring of Belgian coastal waters in the context of the EU Water Framework Directive (2000/60/EC) and OSPAR. It concerns more specifically extra monitoring activities (plague alg Phaeocystis and phytoplanktontaxa cell counts), which are part of an operational monitoring to evaluate the ecological status of the Belgian coastal waters. 3

4 4. OPERATIONAL COURSE All times are given in local time. Monday, July 13 th 09h00 10h00 Embarkation of instruments, MUMM-MONIT and UGENT 10h45 Start of monitoring LPAE/MONIT. 11h25 W01 (Seacat profile and Niskin samples 1, 2, 3) 12h10 W04 (Seacat profile and Niskin samples 4, 5) 13h57 W07 (Seacat profile and Niskin samples 6, 7, 8) Transit to Gootebank 15h00-16h30 Recovery of tripod on Gootebank. 16h57 W05 (Seacat profile and Niskin samples 9, 10, 11) 19h00 W06 (Seacat profile and Niskin samples 12, 13, 14) 20h40 W08 (Seacat profile and Niskin samples 15, 16, 17) 22h15 W10 (Seacat profile and Niskin samples 18, 19, 20) 23h53 W09 (Seacat profile and Niskin samples 21, 22, 23) Tuesday, July 14 th Transit to Blighbank, anchoring 10h30 11h15 12h00 16h15 18h30 Recovering of tripod on Blighbank Acoustic release of ADCP was activated, but ADCP did not came up. Cmd Belgica contacted A. Pollentier and DOVO for asking intervention of divers. Arrival of BNS Valcke and divers. Recuperation of ADCP with Belgica after second intervention of divers and localization of ADCP with acoustic transponder in zodiac. Transit to Oostende 22h25 W02 (Seacat profile and Niskin samples 24, 25, 26) 23h09 W03 (Seacat profile and Niskin samples 27, 28, 29) Wednesday, July 15 th 00h40 Start of tidal cycle measurement at Nieuwpoort (51 N 9.974, 2 E ) 0047 Start of centrifuge 1h00, 1h20, 1h40, 2h00 Niskin samples 1, 2, 3, 4 02h20, 02h40, 03h00 Niskin samples 5, 6, 7 03h20, 03h40, 04h00 Niskin samples 8, 9, 10 04h20, 04h40, 05h00 Niskin samples 11, 12, 13 05h20, 05h40, 06h00 Niskin samples 14, 15, 16 06h20, 06h40, 07h00 Niskin samples 17, 18, 19 07h20, 07h40, 08h00 Niskin samples 20, 21, 22 08h20, 08h40, 09h00 Niskin samples 23, 24, 25 09h00 Disembarkation of UG-LPAE + MUMM-Monit at Nieuwpoort with zodiac 09h20, 09h40, 10h00 Niskin samples 26, 27, 28 10h20, 10h40, 11h00 Niskin samples 29, 30, 31 11h20, 11h40, 12h00 Niskin samples 32, 33, 34 12h20, 12h40, 13h00 Niskin samples 35, 36, 37 4

5 13h20, 13h40 Niskin samples 38, 39 13h20 End of centrifuge (16126 l) 14h00 End of tidal cycle measurement 14h12 Van Veen grab sample at Nieuwpoort (51 N 9.958, 2 E ) Transit to MOW1 17h07 Van Veen grab bed sample at MOW1 (51 N , 3 E ) 17h17 Start of 13h-measuring cycle on Blighbank (51 N , 3 E ) 17h17 Start of centrifuge 17h22 Start of Seacat 17h20, 17h40, 18h00 Niskin samples 1, 2, 3 18h20, 18h40, 19h00 Niskin samples 4, 5, 6 19h20, 19h40, 20h00 Niskin samples 7, 8, 9 20h20, 20h40, 21h00 Niskin samples 10, 11, 12 21h20, 21h40, 22h00 Niskin samples 13, 14, 15 21h43 End of centrifuge 22h20, 22h40, 23h00 Niskin samples 16, 17, 18 23h20, 23h40, 00h00 Niskin samples 19, 20, 21 Thursday, July 16 th 00h20, 00h40, 01h00 Niskin samples 22, 23, 24 01h20, 01h40, 02h00 Niskin samples 25, 26, 27 02h20, 02h40, 03h00 Niskin samples 28, 29, 30 03h20, 03h40, 04h00 Niskin samples 31, 32, 33 04h20, 04h40, 05h00 Niskin samples 34, 35, 36 05h20, 05h40, 06h00 Niskin samples 37, 38, 39 06h00 End of tidal cycle measurement Transit to Zeebrugge 08h00 Arrival at Zeebrugge. Disembarkment of scientific personnel and equipment. - End of campaign ST REMARKS - The commander of the Belgica is acknowledged for the efficient actions taken to recover the ADCP. - The officers and the crew are acknowledged for their skilful recuperation of the tripods and the ADCP. - The BNS Valcke and the divers are acknowledged for their quick intervention to locate the ADCP. - The acoustic release system of the ADCP did not work properly. It is advised to look for another way of deploying the ADCP (e.g. mounted on the tripod) during future campaigns. - The VLIZ is acknowledged for lending out a LISST-100X. The instrument has however not been used during the 13h cycles. 5

6 6. TRACK PLOT Figure 1: Track plot of campaign 2009/20 6

7 7. MEASUREMENTS 7.1 MUMM-MOMO and MUMM-MONIWIND Through tide measurements and water sampling Two 13h cycle were carried out. The first one near Nieuwpoort during Tuesday - Wednesday night (15/07) and the second one at MOW1 during the night of Wednesday to Thursday (15-16/07), see table 1 and figure 2. The Valeport did not work properly. The Lisst 100X was attached to the rosette. Water samples were taken every 20. A vertical profile was measured every 30. The rosette was taken on board every hour. Filtration to determine SPM concentration was carried out on 20 interval samples and to determine POC/PON concentration on 1 hour interval samples. Water samples for salinity were taken every 1 hour (same time as POC/PON). Suspended matter was sampled with the centrifuge. The sediment will be analysed for organic matter, carbonate and mineral content. A grain size analysis will be carried out on the mineral fraction. A Van Veen grab sample has been taken at the end/start of the tidal cycle measurements, see table 2 and photo 1. One sample (Nieuwpoort) has been taken for POC/PON and grain size analysis. At MOW1 two sub-sample (surface + 10cm below surface) have been taken for similar analysis. Table 1: Position of the through tide measurements and centrifuge samples Station Lat/Lon WGS 84 Start (GMT) End (GMT) Nieuwpoort Through tide 51 N 9.974, 2 E /07/ h40 15/07/ h00 Centrifuge (16126 l) 14/07/ h47 15/07/ h20 MOW1 Through tide 51 N , 3 E /07/ h22 16/07/ h00 Centrifuge (8922 l) 15/07/ h17 15/07/ h43 Figure 2: Location of tripod (yellow) on the Goote- and the Blighbank and tidal cycle measurements + VanVeen grab samples (green) at Nieuwpoort and MOW1. 7

8 Table 2: Position of the Van Veen grab samples Station Lat/Lon WGS Date Description 84 (GMT) Nieuwpoort 51 N 9.958, 15/07/200 Fine ms with lot of benthos (Lanice, slangenster, kokkel, 2 E h12 schelpen) upper 2cm green, below black MOW1 51 N , 3 E /07/ h07 A few cm of fluid greenish mud above black mud with intercalation of sandy layers (Holocene) Photo 1: Van Veen grab samples from Nieuwpoort and MOW1. Long-term deployment of tripods Two tripods and one ADCP, which were deployed during campaign 2009/16 have been recovered. The first tripod (B) was located on the Gootebank (equipped with SonTek/YSI ADV Ocean/Hydra, a SonTek/YSI 3MHz ADP, a SeaBird MicroCat CT + 2 OBS). The second tripod (H) and the ADCP was recovered on the Blighbank. The tripod was equipped with SonTek/YSI ADV Ocean/Hydra, a SonTek/YSI 3MHz ADP, a SeaBird MicroCat CT + 3 OBS and a Sequoia LISST-X, see figure 2. More bio-fouling on tripod from Gootebank (B) was observed than on (new) tripod from Blighbank (H), see photos 2-3. The tripod from Blighbank (H) was covered with fine sand, see photo 3. Photo 2: Tripod (B) from Gootebank, recovered after about 20 days in warm North Sea water. 8

9 Photo 3: Tripod (H) from Blighbank, recovered after about 20 days in warm North Sea water. The tripod was covered with fine sand and shells. 7.2 MUMM-MONIT 7.3 UGENT-LPAE Water sampling At 9 fixed stations, (W01, W02, W03, W05, W06, W07, W08, W09 and W10) samples have been taken with a Niskin bottle at a depth of 3m. Table 3: Position of the stations for the LPAE-Ugent monitoring. Station Long. (DMS) Lat. (DMS) LPAE ODAS Water Niskin W X X W X X W X X W X X W X X W X X W X X W X X W X X W X X 9

10 Water temperature, conductivity and salinity were measured with the SBE19 CTD SeaCat at one meter above seabottom and at a depth of 3 m. On each occasion the water transparency was measured with a Secchi disc (see table 4). Table 4: Data of sechi-depth during sampling at each station Station Secchidepth W m W02 To dark W03 To dark W05 W06 W07 W08 W09 W10 Treatment of sample Phytoplankton concentration for pigment analysis was done by filtration of a known volume of water over a glass fibre filter (GF/F). This filter was immediately frozen in liquid oxygen and stored in the laboratory at -80 C to avoid pigment degradation. For total nutrient analysis (TN, TP), a sub sample of 100 ml was taken and immediately frozen at -20 C. For the analysis of dissolved nutrients (PO 4, NO 3, NO 2, NH 4 ), a known volume of water (usually 100 ml) was filtered over a GF/F filter. The filtrate was immediately frozen at -20 C. One liter of the water sample was poured into a glass bottle and fixed with 100ml of a tetraborate buffered paraformaldehyde dilution, to obtain a final concentration around 2%. One liter of sample was poured into a glass bottle and kept in the dark at 4 C until examination of living phytoplankton. 10