SCOOBIES (the Scotia Sea open-ocean observatory) makes sustained observations focussed on crucial Earth System indicators in Antarctica that are vital to UK and global science.
National Capability Science
The open ocean observatories are situated in the northern Scotia Sea to investigate the biological and biogeochemical influence of the largest persistent phytoplankton bloom in the Southern Ocean. Relative to its size, Southern Ocean sequesters a disproportionate amount of anthropogenic carbon to the deep ocean. Moorings are equipped to measure the amount of carbon reaching the deep ocean. This is the end-point to a long chain of events which starts with carbon entering the surface layers and being fixed by photosynthetic plankton. These organisms die or are eaten and some of the carbon they contain eventually sinks into the deeper layers, leading to its removal from the biosphere.
The SCOOBIES site provides a platform for a wealth of interdisciplinary science
Understanding the carbon pump
This process is known as the carbon pump and is a key process in the regulation of atmospheric CO2. Much of what we know about the carbon pump has been obtained through moored sediment traps deployed over annual cycles. Such moorings have given us some of the only measurements of biological activity at certain times of year in the Southern Ocean when seasonal sea-ice covers large areas. Over the last decades, these instruments have helped resolve spatial and temporal variability in the carbon pump in the Southern Ocean and its sensitivity to regional climate change. The bulk of this sequestration is likely to occur in highly productive zones such as at the South Georgia bloom. Our understanding of the fate of carbon in such sites is nevertheless limited by lack of in situ observations. SCOOBIES is making strategically important measurements on the fate of carbon within the site of the bloom (site P3). It is also one of very small number of observatories making continuous measurements of carbonate chemistry parameters (pH and CO2 sensors) with which to document ocean acidification, which is increasing rapidly in polar regions. The WCB mooring provides a shelf-region comparison to the open-ocean measurements of the P3 site, and historically measurements were also taken from a mooring at a lower productivity region in the Scotia Sea (site P2).
SCOOBIES sustained observation stations
Enhance understanding of Southern Ocean environmental variation and response
SCOOBIES is making decadal scale measurements of environmental variation and responses to that variation, which are of major importance in the functioning of Southern Ocean systems. Many of the datasets have already been used by a number of UK and international science teams, and other stakeholders (UK govt., fisheries management bodies, conservation NGOs). Leading roles in national and international science programmes have been facilitated as a result of undertaking this programme.
Capture and analyse long term carbon data
The sustained observations undertaken by SCOOBIES presently provides the only long-term measurements of carbon flux and sequestration in the Atlantic sector of the Southern Ocean. The observatories (2 currently, previously 3) are strategically placed around the South Georgia bloom, the largest hotspot of primary productivity in the Southern Ocean, and a major region of atmospheric carbon drawdown. The observatories are maintained in association with the bioacoustic systems deployed as part of the POETS funded programme. POETS supports the major hardware for the observatories, such as weights, rope and recovery buoys. SCOOBIES encompasses the augmentation of these moorings with devices that measure parameters relevant to biogeochemical cycles, vertical flux, ocean acidification and microplastic monitoring. It also involves zooplankton net sampling in the vicinity of the moorings. Moored instrumentation generates year-round measurements to examine the role of the planktonic food web in biogeochemical processes and vertical flux of carbon and silica, and the influence of environmental variables on these processes, including eddy activity, variability in the location of water masses, upwelling, and ocean acidification.
Build expertise that influences other research programmes
SCOOBIES was a major driver to the COMICS NERC Large Grant proposal, which was successfully funded in 2015 to determine the major drivers in mechanisms controlling the attenuation of carbon flux with depth. This £3.7M proposal will carry out a major multi-institute, multi-disciplinary cruise around the SCOOBIES sites in November and December 2017, bringing together expertise in physics, biogeochemistry and marine robotics to augment the sustained observations being made in this region by the SCOOBIES team. The expertise built up by SCOOBIES was also integral part of PICCOLO NERC Thematic grant, which recently bid successfully to examine carbon flux and other biogeochemical processes in the lower limb of Antarctic overturning circulation as part of the ROSES programme in support of the NERC LTSM project, ORCHESTRA. SCOOBIES scientists will measure sinking particulate carbon and pelagic biomass in the Weddell Sea, using techniques developed at the SCOOBIES site and, in so doing, providing a high latitude comparison to SCOOBIES.
Today the royal research ship RRS Discovery will depart Southampton for an ambitious science expedition to the ocean around South Georgia. This expedition will take place almost 100 years after …
2 weekly to monthly resolution through moored instrumentation – particulate organic carbon (POC), particulate inorganic carbon (PIC) and particulate biosilica (BSI) and biological flux components phytoplankton detritus, faecal pellets, foraminifera and pteropods, analyses of the carbonate chemistry (for derivation of pH), pCO2 and hydrological variables, temperature, salinity, fluorescence, dissolved oxygen and concentrations and composition of microplastics.
Annual visits to the site – depth-discrete zooplankton community composition (0-1000 m), stable isotope analyses of key species, physical and biogeochemical measurements with which to calibrate and baseline the moored instrumentation
For access to data, contact: Geraint Tarling (gant@bas.ac.uk) and Clara Manno (clanno@bas.ac.uk)
Open-access data
Euphausiid and salp abundance and population parameters up to 2016 (and including Discovery Investigation data https://www.bas.ac.uk/project/krillbase – doi for data up to 2016 https://www.bas.ac.uk/project/krillbase – available for external download
Physical and acoustic data from moorings
Data collected as part of the SCOOBIES program can be found through the following links:
Manno, C. Stowasser, G., Enderlein, P., Fielding, S., Tarling, G. A. (2015) The contribution of zooplankton faecal pellets to deep carbon transport in the Scotia Sea (Southern Ocean) Biogeosciences, https://doi.org/10.5194/bg-12-1955-2015
Rembauville, M., Manno, C., Tarling, G.A., Blain, S., Salter, I. (2016) Strong contribution of diatom resting spores to deep-sea carbon transfer in naturally iron-fertilized waters downstream of South Georgia. Deep Sea Research Part I: Oceanographic Research Papers, 115. 22-35. doi:10.1016/j.dsr.2016.05.002
Belcher, A., Manno, C., Ward, P., Henson, S., Sanders, R., Tarling, G.A. (2017) Copepod faecal pellet transfer through the meso- and bathypelagic layers in the Southern Ocean in spring. Biogeosciences, 14. 1511-1525. doi:10.5194/bg-14-1511-2017
Belcher, A., Manno, C., Thorpe, S., Tarling, G.A. (2018) Acantharian cysts: high flux occurrence in the bathypelagic zone of the Scotia Sea, Southern Ocean. Marine Biology, 165. 11 pp. doi: 10.1007/s00227-018-3376-1
Rembauville, M., Blain, S., Manno, C., Tarling, G.A., Thompson, A., Wolff, G., Salter, I. (2018) The role of diatom resting spores in pelagic–benthic coupling in the Southern Ocean. Biogeosciences, 15. 3071-3084. doi: 10.5194/bg-15-3071-2018
Manno, C., Giglio, F., Stowasser, G., Fielding, S., Enderlein, P., Tarling, G.A. (2018) Threatened species drive the strength of the carbonate pump in the northern Scotia Sea. Nature Communications, 9. doi: 10.1038/s41467-018-07088-y
Manno, C. , Fielding, S., Stowasser, G., Murphy, E.J., Thorpe, S.E., Tarling, G.A. (2020) Continuous moulting by Antarctic krill drives major pulses of carbon export in the north Scotia Sea, Southern Ocean. Nature Communications, 11. doi: 10.1038/s41467-020-19956-7
The RRS Sir David Attenborough, commissioned by NERC, built by Cammell Laird for operation by British Antarctic Survey, is one of the most advanced polar research vessels in the world.