RV Marisa MR07/11
Cruise summary report
| Cruise Info. | |
| Ship name (ship code) | RV Marisa (74MQ) |
| Cruise identifier | MR07/11 |
| Cruise period | 2011-11-08 — 2011-11-10 |
| Status | Completed |
| Port of departure | Liverpool, United Kingdom |
| Port of return | Liverpool, United Kingdom |
| Purpose | Research |
| Objectives | Two moorings are maintained at the Mersey Bar Station (MBS). Instruments are mounted in a sea bed frame, and at 5 m below a spar buoy and along its mooring chain. Maintaining a long time series of observations will ultimately facilitate the determination of natural and anthropogenic variability within Liverpool Bay. The primary aim of the cruise is to recover and redeploy this
instrumentation. The second cruise objective is to undertake conductivity, temperature and depth (CTD) profiles at a number of stations surrounding the mooring site and along the mouth of the River Mersey. In addition to a SeaBird CTD, the CTD's frame also included three Niskin bottles with firing at pre-programmed depths, a WET Labs ac-s instrument with Triplet and a DH4 logger. Water samples were obtained in Niskin bottles for determining concentrations of: suspended particulate matter (SPM), chlorophyll-a and chromophoric or coloured dissolved organic matter (CDOM) and nutrients near the sea bed (or 20 m), and near-surface (2 m). An additional objective is to complete a six-hour station of half-hourly CTD profiles. Water samples were obtained during on-the-hour profiles for determining concentrations of: suspended particulate matter (SPM), chlorophyll-a, CDOM and nutrients near the sea bed (or 20 m), 10 m below the sea surface, and near-surface (2 m). |
| Chief scientist | Andrew Lane (National Oceanography Centre, Liverpool), Matthew R Palmer (National Oceanography Centre, Liverpool) |
| Project | Liverpool Bay Observatory |
| Cruise report |  (0.42 MB) |
| Ocean/sea areas | |
| General | Irish Sea and St. George's Channel |
| Specific | Liverpool Bay, Eastern Irish Sea |
| Track charts | (0.42 MB) |
| Data held at BODC | |
| Discrete samples | |
| 10 CTD frame plus rosette sampler | Concentration of suspended particulate material in the water column Phaeopigment concentrations in the water column Chlorophyll pigment concentrations in water bodies |
