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RRS James Clark Ross JR20020615 (JR75)
Cruise summary report
Cruise Info. | |
Ship name (ship code) | RRS James Clark Ross (74JC) |
Cruise identifier | JR20020615 (JR75) |
Cruise period | 2002-06-15 — 2002-07-10 |
Status | Completed |
Port of departure | Leith, United Kingdom |
Port of return | Stornoway, United Kingdom |
Purpose | Research |
Objectives | This cruise directly addressed the following SAMS Northern Seas programme elements:
Theme A, Question 4 How does bioturbation vary in response to environmental forcing and what are the consequences for redistribution of anthropogenic contaminants? How does the anthropogenic burden change along a northern transect of 4 stations (67 to 81 N)? Theme A, Question 5 To deliver an understanding of the effect of abrupt climate change and land use on fjordic/sea loch systems, which link the marine and terrestrial environments at high latitudes in Northwest Europe. Theme B, Question 2 To what extent does benthic faunal composition and size structure determine processes of carbon dynamics ? Can we link changes in regional patterns in sediment biogeochemistry with disparate patterns in benthic distributions? Bioturbation processes form the interface between seabed biology and geochemistry. The 'environmental forcing' referred to in the programme is likely to vary both with depth (eg. fjordic-shelf-slope-abyss) and latitude (north-south gradients in intensity and interannual variability of pulsed OM input). Bioturbation therefore provides a crossover between the two main themes of the Northern Seas programme. Work to be carried out from JCR should be seen as an essential supplement to the Wyville-Thomson work carried out on D257. To test the reality or otherwise of benthic biogeochemical 'provinces' we require comparable data from a range of sites in the water masses north and south of the WT Ridge (differences between our WTN and WTS stations does not in itself amount to a demonstration of 'provinces'). The WTS results can be put alongside existing data from previous studies in the Atlantic water mass (BENBO, SES), but at present we need more stations north of the ridge to compare with WTN. |
Chief scientist | Graham B Shimmield (Scottish Association for Marine Science) |
Project | SAMS - Northern Seas programme |
Cruise report | (1.23 MB) (2.68 MB) (0.05 MB) (0.14 MB) |
Ocean/sea areas | |
General | North Sea |
Track charts | (0.19 MB) |
Measurements | |
Physical oceanography | |
Bathythermograph | Quantity: number of deployments = 119 Description: XBT's were deployed at various points throughout the cruise. |
CTD stations | Quantity: number of profiles = 32 Description: CTD profiles were made during the cruise. |
Subsurface temperature and salinity measurements | Quantity: number of profiles = 32 Description: CTD profiles were made during the cruise. |
Subsurface temperature and salinity measurements | Quantity: number of recoveries = 2 Description: During the cruise moorings were recovered. |
Subsurface temperature and salinity measurements | Quantity: number of deployments = 11 Description: Throughout the cruise the lander was deployed several times to collect samples. |
Subsurface temperature measurements | Quantity: number of recoveries = 2 Description: During the cruise moorings were recovered. |
Current meters | Quantity: number of recoveries = 2 Description: During the cruise moorings were recovered. |
Chemical oceanography | |
Oxygen | Quantity: number of deployments = 11 Description: Throughout the cruise the lander was deployed several times to collect samples. |
Biology and fisheries | |
Phytoplankton pigs (eg chlorophyll, fluorescence) | Quantity: number of recoveries = 2 Description: During the cruise moorings were recovered. |
Sediment traps | Quantity: number of recoveries = 2 Description: During the cruise moorings were recovered. |
Geology and geophysics | |
Core - soft bottom | Quantity: number of samples = 10 Description: Sediment samples were collected throughout the cruise using the gravity core |
Core - soft bottom | Quantity: number of samples = 28 Description: Multi-core samples were taken during the cruise. |
Core - soft bottom | Quantity: number of samples = 23 Description: NIOZ box-corer samples were collected throughout the cruise. |
Core - soft bottom | Quantity: number of samples = 17 Description: The mega-corer was used to gain sea floor samples. |
Bottom photography | Quantity: number of images = 13 Description: BedHop camera proflier was used. |