RRS Charles Darwin CD111
Cruise summary report
| Cruise Info. | |
| Ship name (ship code) | RRS Charles Darwin (74AB) |
| Cruise identifier | CD111 |
| Cruise period | 1998-04-20 — 1998-05-15 |
| Status | Completed |
| Port of departure | Southampton, United Kingdom |
| Port of return | Fairlie, United Kingdom |
| Purpose | Research |
| Objectives | The objectives of the cruise may only be broadly defined due to the multi-disciplinary and multi-institutional nature of the cruise. In general terms, the objectives were to undertake, to a satisfactory extent, the major proposed research activities of the individual research groups. A major core objective was to collect oxygen consumption and diffusion data using the new benthic Lander for the BENBO community as a whole at each of the three experimental sites. Moorings at each of the study sites were to be turned around and the bottom-mounted ADCP instrument at site B was to be recovered permanently. Throughout the cruise, satellite imagery of sea surface colour and temperature was obtained routinely to assess the nature and extent of the upper ocean phytoplankton bloom. |
| Chief scientist | Kevin S Black (Dunstaffnage Marine Laboratory) |
| Project | BENBO |
| Cruise report |  (0.65 MB) |
| Ocean/sea areas | |
| General | North East Atlantic Ocean (limit 40W) |
| Specific | Mouth of Rockall Trough; Hatton-Rockall Basin; Flank of Feni Drift |
| Track charts | (0.12 MB) |
| Moorings, landers, buoys | |
| Physical oceanography | |
| CTD stations | 52° 53' 59" N 16° 52' 59" W — Surface water and CTD sampling. Sample: CTD3 Depth: 101 Time: 19.00 Site A |
| CTD stations | 57° 7' 59" N 12° 28' 59" W — Surface water and CTD sampling. Sample: CTD4 Depth: 50 Time: 19.13 |
| CTD stations | 57° 7' 59" N 12° 28' 59" W — Surface water and CTD sampling. Sample: CTD2 Depth: 100 Time: 19.13 Site C |
| CTD stations | 52° 53' 59" N 16° 52' 59" W — Surface water and CTD sampling. Sample: CTD4 Depth: 52 Time: 19.00 Site A |
| CTD stations | 57° 7' 59" N 12° 28' 59" W — Surface water and CTD sampling. Sample: CTD3 Depth: 75 Time: 19.13 Site C |
| CTD stations | 57° 7' 59" N 12° 28' 59" W — Surface water and CTD sampling. Sample: CTD1 Depth: 250 Time: 19.13 Site C |
| CTD stations | 57° 24' 59" N 15° 42' 59" W — Surface water and CTD sampling. Sample: CTD5 Depth: 26 Time: 19.10 Site B |
| CTD stations | 57° 24' 59" N 15° 42' 59" W — Surface water and CTD sampling. Sample: CTD4 Depth: 50 Time: 19.10 Site B |
| CTD stations | 57° 24' 59" N 15° 42' 59" W — Surface water and CTD sampling. Sample: CTD3 Depth: 64 Time: 19.10 Site B |
| CTD stations | 57° 24' 59" N 15° 42' 59" W — Surface water and CTD sampling. Sample: CTD2 Depth: 100 Time: 19.10 Site B |
| CTD stations | 57° 24' 59" N 15° 42' 59" W — Surface water and CTD sampling. Sample: CTD1 Depth: 250 Time: 19.10 Site B |
| CTD stations | 52° 53' 59" N 16° 52' 59" W — Surface water and CTD sampling. Sample: CTD5 Depth: 25 Time: 19.00 Site A |
| CTD stations | 52° 53' 59" N 16° 52' 59" W — Surface water and CTD sampling. Sample: CTD2 Depth: 251 Time: 19.00 Site A |
| CTD stations | 57° 7' 59" N 12° 28' 59" W — Surface water and CTD sampling. Sample: CTD5 Depth: 25 Time: 19.13 |
| CTD stations | 52° 53' 59" N 16° 52' 59" W — Surface water and CTD sampling. Sample: CTD1 Depth: 497 Time: 19.00 Site A |
| Subsurface temperature and salinity measurements | 57° 4' 59" N 12° 28' 59" W — Surface water and CTD sampling. Sample: SSW6 Depth: 0 Time: 16.00 |
| Subsurface temperature and salinity measurements | 57° 24' 59" N 15° 39' 0" W — Surface water and CTD sampling. Sample: SSW4 Depth: 0 Time: 16.00 |
| Subsurface temperature and salinity measurements | 56° 3' 59" N 16° 6' 0" W — Surface water and CTD sampling. Sample: SSW3 Depth: 0 Time: 15.11 |
| Subsurface temperature and salinity measurements | 55° 4' 59" N 16° 21' 59" W — Surface water and CTD sampling. Sample: SSW2 Depth: 0 Time: 09.34 |
| Subsurface temperature and salinity measurements | 52° 53' 59" N 16° 52' 59" W — Surface water and CTD sampling. Sample: SSW1 Depth: 0 Time: 12.15 |
| Subsurface temperature and salinity measurements | 57° 15' 0" N 14° 11' 59" W — Surface water and CTD sampling. Sample: SSW5 Depth: 0 Time: 10.23 |
| Biology and fisheries | |
| Phytoplankton pigs (eg chlorophyll, fluorescence) | 57° 8' 23" N 12° 29' 13" W — Determination of chl. Sample: iv Time: 1913 Source: CTD@50m Volume Filtered: 2 Comments: sampled in the chl sub-surf. Maximum |
| Phytoplankton pigs (eg chlorophyll, fluorescence) | 57° 8' 2" N 12° 29' 27" W — Determination of chl. Sample: viii Time: 1145 Source: TSG Volume Filtered: 2 Comments: misty, no sun! |
| Phytoplankton pigs (eg chlorophyll, fluorescence) | 57° 9' 35" N 13° 21' 28" W — Determination of chl. Sample: vii Time: 1252 Source: TSG Volume Filtered: 2 Comments: cloudy, scattered sunlight |
| Phytoplankton pigs (eg chlorophyll, fluorescence) | 57° 17' 30" N 14° 37' 31" W — Determination of chl. Sample: vi Time: 0905 Source: TSG Volume Filtered: 2 Comments: cloudy; en routeSite B-C, CD111B |
| Phytoplankton pigs (eg chlorophyll, fluorescence) | 57° 25' 14" N 15° 36' 16" W — Determination of chl. Sample: v Time: 1821 Source:TSG Volume Filtered: 2 Comments: very sunny |
| Phytoplankton pigs (eg chlorophyll, fluorescence) | 57° 25' 0" N 15° 42' 33" W — Determination of chl. Sample: iv Time: 1921 Source: CTD@65m Volume Filtered: 2 Comments: chl maximum on TSG very pronounced |
| Phytoplankton pigs (eg chlorophyll, fluorescence) | 56° 9' 19" N 16° 4' 17" W — Determination of chl. Sample: i Time: 1543 Source: TSG Volume Filtered: 2 Comments: some fluoresence on TSG trace |
| Phytoplankton pigs (eg chlorophyll, fluorescence) | 54° 40' 17" N 15° 55' 6" E — Determination of chl. Sample: ii Time: 1838 Source: TSG Volume Filtered: 2 Comments: evening sunshine |
| Phytoplankton pigs (eg chlorophyll, fluorescence) | 57° 25' 13" N 15° 43' 20" W — Determination of chl. Sample: iii Time: 0900 Source: TSG Volume Filtered: 2 Comments: at Site B, CD111B on way back |
| Biochemical measurements (eg lipids, amino acids) | 57° 6' 0" N 12° 30' 54" W — Site C; Flank of Feni Drift Depth: 1920m |
| Biochemical measurements (eg lipids, amino acids) | 52° 55' 4" N 16° 55' 1" W — Site A; Mouth of Rockall Trough Depth: 3580m |
| Biochemical measurements (eg lipids, amino acids) | 57° 25' 29" N 15° 40' 58" W — Site B; Hatton-Rockall Basin Depth: 1100m |
| Data held at BODC | |
| Discrete samples | |
| 10 CTD frame plus rosette sampler | |
| 4 Instrument mooring |
