BODC Cruise Metadata Report for RRS James Clark Ross (74JC) cruise JR20101221 (JR245, JR246, JR247)
Introduction
This report collates information from the BODC cruise inventory and oceanographic databases. It presents
- Cruise Inventory Information
- A summary of BODC data holdings for the cruise from the
- References - including cruise tracks and cruise reports
Cruise Inventory Information
| Long name | RRS James Clark Ross (74JC) cruise JR20101221 (JR245, JR246, JR247) |
|---|---|
| Short name | JR20101221 (JR245, JR246, JR247) |
| Objectives and Narrative |
Cruises JR245, 246 and 247 were amalgamated into one cruise. JR245 was 19 days of the Western Core Box cruise, JR246 was 2 days of Hotspots and JR247 was 7 science days for an AFI project (The role of krill grazing in Southern Ocean nutrient cycles). In addition there was an AFI-CGS (Individual physiological and behavioural responses of krill to distributional shifts and thermal change) project undertaken. All three projects were focussed on investigating Antarctic krill (Euphausia superba) and it was therefore sensible to combine them into one cruise focused around South Georgia.
JR245 Western Core Box Since 1981 BAS have undertaken cruises to determine krill biomass as part of the ongoing assessment of the status of the marine ecosystem in the region of South Georgia. This unique time series, known as the "Western Core Box" is part of the Ecosystem Programme contribution to BAS' national capability. It is comprised of an acoustic grid survey of 8 transects each of 80 km in length, together with associated net and oceanographic sampling and the calibration of the acoustic instrumentation. In addition to the acoustic survey, which covers a wide area but has limited temporal coverage, there are three moorings (one in the Western Core Box and one south and one north of South Georgia) to provide a temporal context. These moorings are typically recovered and redeployed during the WCB survey. Due to the lack of gantry this year the moorings were not recovered or redeployed. JR247 The role of krill grazing in Southern Ocean nutrient cycles Even though Antarctic krill are a key species in the Southern Ocean food web and commercially fished for, little is known about their role in biogeochemical cycles. This AFI project will test the hypothesis that Antarctic krill help to promote the drawdown of CO2 from the atmosphere to the deep ocean by enhancing the biological carbon pump. It will address (a) how much carbon, nitrogen, silica and iron are in krill fecal pellets, (b) do the elements dissolve out of the pellets before sinking to depth, (c) do krill accumulate iron in their bodies and (d) how much iron and nitrogen do krill release in dissolved form when feeding. AFI-CGS Individual physiological and behavioural responses of krill to distributional shifts and thermal change The physiology of krill is considered to be stenothermal, operating most efficiently within a narrow temperature range of between 0 and 2C. South Georgia is a krill rich region, but recent reports have indicated there has been a mean increase of 0.9C in its surface waters over the past 81 years. Trend analyses have also pointed to a significant negative relationship between summer South Georgia temperatures and mean summer density of krill, predicting a decline in the suitability of this area as a future krill habitat. The physiological response of krill to temperature change will be investigated through analysis of aerobic respiration and other indicators of performance. |
| Ship | RRS James Clark Ross |
| Departure Port | Stanley, Falkland Islands (Malvinas) |
| Departure Date | 2010-12-21 |
| Arrival Port | Stanley, Falkland Islands (Malvinas) |
| Arrival Date | 2011-01-19 |
| Principal Scientist(s) | Sophie Fielding (British Antarctic Survey) |
| Responsible Organisation | British Antarctic Survey |
| Associated Project(s) | Ecosystems; BAS Long Term and Monitoring Survey |
| IHB Sea Areas Visited | South Atlantic Ocean |
| Marsden Squares Visited | 483/484/485 |
| Work Area Description | South Atlantic Ocean and Scotia Sea. |
| Unable to lookup cruise bounds at this time | |
| Work Area Bounding Polygon | |
| Southern Limit | unknown |
| Northern Limit | unknown |
| Western Limit | unknown |
| Eastern Limit | unknown |
Cruise Inventory Datasets
| Physical oceanography | |
|---|---|
| Bathythermograph | Description: XBT |
| CTD stations | Description: CTD |
| Current profiler (eg ADCP) | Description: ADCP |
| Surface measurements underway (T,S) |
Quantity:
number of track lines =
1
Description: Underway - ships non toxic pumped sea water supply |
| Water bottle stations | Description: CTD |
| Chemical oceanography | |
| Trace elements | Description: Towed iron fish underway sea water supply |
| Trace elements | Description: SAPS - time period pumping through filter |
| Trace elements | Description: Go-flo bottles (clean water) varying depth |
| Biology and fisheries | |
| Nekton | Description: Custom 1m Net - Themisto swimming |
| Phytoplankton pigs (eg chlorophyll, fluorescence) |
Quantity:
number of track lines =
1
Description: Underway - ships non toxic pumped sea water supply |
| Zooplankton | Description: Bongo net - obliquely hauled |
| Zooplankton | Description: Custom 1m Net - Krill feeding and egestion incubations |
| Zooplankton | Description: Custom 1m Net - krill length measurements, krill oxygen respiration rates & calorific value |
| Zooplankton | Description: Custom 1m Net - Krill swimming and tail flip response to stimulus |
| Meteorology | |
| Routine standard measurements | Description: Onboard ships meteorological |
| Geology and geophysics | |
| Multi-beam echosounding | Description: EK60 Multi-beam |
| Single-beam echosounding | Description: EA600 Single Beam |
Cruise Inventory Mooring/Buoy Operations
No information on datasets is currently available
Summary of BODC Data Holdings for the Cruise
National Oceanographic Database
Summary
| # Series | Instrument Description | Parameters |
|---|---|---|
| 26 | Bathythermograph (MBT/XBT) |
Reference numbers Sound velocity and travel time in the water column Temperature of the water column Vertical spatial coordinates |
| 20 | CTD/STD cast |
Chlorophyll pigment concentrations in water bodies Density of the water column Dissolved oxygen parameters in the water column Electrical conductivity of the water column Reference numbers Salinity of the water column Temperature of the water column Transmittance and attenuance of the water column Vertical spatial coordinates |
| 4 | CTD/STD cast |
Chlorophyll pigment concentrations in water bodies Density of the water column Electrical conductivity of the water column Reference numbers Salinity of the water column Temperature of the water column Transmittance and attenuance of the water column Vertical spatial coordinates |
| 1 | Meteorological data logger |
Air pressure Air temperature Atmospheric humidity Date and time Horizontal spatial co-ordinates Solar Radiation Visible waveband radiance and irradiance measurements in the atmosphere Wind strength and direction |
| 1 | Multiple instrument types |
Chlorophyll pigment concentrations in water bodies Date and time Electrical conductivity of the water column Horizontal spatial co-ordinates Metadata parameters Salinity of the water column Sound velocity and travel time in the water column |
| 1 | Single-beam echosounder |
Bathymetry and Elevation Date and time Horizontal platform movement Horizontal spatial co-ordinates Platform or instrument orientation |
Note: Parameter terms are taken from the BODC Parameter Discovery Vocabulary XML (SKOS)
Full List
| BODC Reference | Instrument Description | Date/Time | Location | |
|---|---|---|---|---|
| 1174102 | Bathythermograph (MBT/XBT) | 2010-12-26 08:58Z | 54° 3' S, 39° 23' W | Click for more |
| 1174114 | Bathythermograph (MBT/XBT) | 2010-12-26 10:08Z | 53° 52' S, 39° 26' W | Click for more |
| 1174126 | Bathythermograph (MBT/XBT) | 2010-12-26 11:14Z | 53° 42' S, 39° 30' W | Click for more |
| 1174138 | Bathythermograph (MBT/XBT) | 2010-12-26 12:22Z | 53° 31' S, 39° 33' W | Click for more |
| 1174151 | Bathythermograph (MBT/XBT) | 2010-12-26 13:30Z | 53° 21' S, 39° 36' W | Click for more |
| 1174163 | Bathythermograph (MBT/XBT) | 2010-12-27 09:27Z | 53° 17' S, 39° 2' W | Click for more |
| 1174175 | Bathythermograph (MBT/XBT) | 2010-12-27 10:34Z | 53° 27' S, 38° 58' W | Click for more |
| 1174187 | Bathythermograph (MBT/XBT) | 2010-12-27 11:41Z | 53° 38' S, 38° 55' W | Click for more |
| 1174199 | Bathythermograph (MBT/XBT) | 2010-12-27 12:48Z | 53° 49' S, 38° 52' W | Click for more |
| 1174206 | Bathythermograph (MBT/XBT) | 2010-12-27 13:55Z | 53° 59' S, 38° 49' W | Click for more |
| 1174218 | Bathythermograph (MBT/XBT) | 2010-12-28 09:05Z | 53° 55' S, 38° 13' W | Click for more |
| 1174231 | Bathythermograph (MBT/XBT) | 2010-12-28 10:13Z | 53° 45' S, 38° 16' W | Click for more |
| 1174243 | Bathythermograph (MBT/XBT) | 2010-12-28 11:21Z | 53° 34' S, 38° 19' W | Click for more |
| 1174255 | Bathythermograph (MBT/XBT) | 2010-12-28 11:24Z | 53° 34' S, 38° 20' W | Click for more |
| 1174267 | Bathythermograph (MBT/XBT) | 2010-12-28 12:28Z | 53° 24' S, 38° 23' W | Click for more |
| 1174279 | Bathythermograph (MBT/XBT) | 2010-12-28 13:31Z | 53° 13' S, 38° 27' W | Click for more |
| 1174280 | Bathythermograph (MBT/XBT) | 2010-12-30 09:10Z | 53° 9' S, 37° 57' W | Click for more |
| 1174292 | Bathythermograph (MBT/XBT) | 2010-12-30 10:16Z | 53° 20' S, 37° 54' W | Click for more |
| 1174311 | Bathythermograph (MBT/XBT) | 2010-12-30 11:27Z | 53° 31' S, 37° 51' W | Click for more |
| 1174323 | Bathythermograph (MBT/XBT) | 2010-12-30 12:33Z | 53° 41' S, 37° 47' W | Click for more |
| 1174335 | Bathythermograph (MBT/XBT) | 2010-12-30 13:39Z | 53° 52' S, 37° 43' W | Click for more |
| 1174347 | Bathythermograph (MBT/XBT) | 2010-12-30 14:51Z | 53° 51' S, 37° 35' W | Click for more |
| 1174359 | Bathythermograph (MBT/XBT) | 2010-12-30 15:58Z | 53° 40' S, 37° 39' W | Click for more |
| 1174360 | Bathythermograph (MBT/XBT) | 2010-12-30 17:05Z | 53° 30' S, 37° 42' W | Click for more |
| 1174372 | Bathythermograph (MBT/XBT) | 2010-12-30 18:18Z | 53° 19' S, 37° 46' W | Click for more |
| 1174384 | Bathythermograph (MBT/XBT) | 2010-12-30 19:26Z | 53° 9' S, 37° 49' W | Click for more |
| 1741698 | CTD/STD cast | 2010-12-22 11:47Z to 2010-12-22 11:56Z | 52° 15' S, 51° 24' W | Click for more |
| 1741705 | CTD/STD cast | 2010-12-25 07:15Z to 2010-12-25 07:22Z | 53° 42' S, 38° 12' W | Click for more |
| 1741717 | CTD/STD cast | 2010-12-26 23:30Z to 2010-12-26 23:36Z | 53° 51' S, 39° 8' W | Click for more |
| 1741729 | CTD/STD cast | 2010-12-27 07:03Z to 2010-12-27 07:23Z | 53° 29' S, 39° 15' W | Click for more |
| 1741730 | CTD/STD cast | 2010-12-27 21:04Z to 2010-12-27 21:25Z | 53° 25' S, 38° 42' W | Click for more |
| 1741742 | CTD/STD cast | 2010-12-28 07:06Z to 2010-12-28 07:11Z | 53° 47' S, 38° 34' W | Click for more |
| 1741754 | CTD/STD cast | 2010-12-28 20:14Z to 2010-12-28 20:20Z | 53° 42' S, 37° 58' W | Click for more |
| 1741766 | CTD/STD cast | 2010-12-30 07:04Z to 2010-12-30 07:22Z | 53° 21' S, 38° 4' W | Click for more |
| 1741778 | CTD/STD cast | 2010-12-31 07:04Z to 2010-12-31 07:31Z | 53° 29' S, 37° 42' W | Click for more |
| 1741791 | CTD/STD cast | 2011-01-01 07:04Z to 2011-01-01 07:09Z | 53° 59' S, 36° 22' W | Click for more |
| 1741809 | CTD/STD cast | 2011-01-01 12:50Z to 2011-01-01 12:52Z | 54° 9' S, 36° 41' W | Click for more |
| 1741810 | CTD/STD cast | 2011-01-02 07:17Z to 2011-01-02 07:22Z | 53° 59' S, 36° 22' W | Click for more |
| 1741822 | CTD/STD cast | 2011-01-03 07:30Z to 2011-01-03 07:37Z | 54° 6' S, 35° 27' W | Click for more |
| 1741834 | CTD/STD cast | 2011-01-03 14:33Z to 2011-01-03 14:38Z | 54° 6' S, 35° 27' W | Click for more |
| 1741846 | CTD/STD cast | 2011-01-04 07:05Z to 2011-01-04 07:11Z | 54° 15' S, 35° 21' W | Click for more |
| 1741858 | CTD/STD cast | 2011-01-05 15:53Z to 2011-01-05 16:09Z | 54° 37' S, 34° 48' W | Click for more |
| 1741871 | CTD/STD cast | 2011-01-06 09:08Z to 2011-01-06 09:11Z | 54° 31' S, 35° 16' W | Click for more |
| 1741883 | CTD/STD cast | 2011-01-07 07:11Z to 2011-01-07 07:17Z | 54° 33' S, 35° 35' W | Click for more |
| 1741895 | CTD/STD cast | 2011-01-08 07:04Z to 2011-01-08 07:19Z | 53° 37' S, 36° 20' W | Click for more |
| 1741902 | CTD/STD cast | 2011-01-09 07:12Z to 2011-01-09 07:17Z | 54° 16' S, 35° 52' W | Click for more |
| 1741914 | CTD/STD cast | 2011-01-10 07:24Z to 2011-01-10 07:29Z | 53° 54' S, 36° 34' W | Click for more |
| 1741926 | CTD/STD cast | 2011-01-11 07:53Z to 2011-01-11 07:59Z | 54° 6' S, 36° 15' W | Click for more |
| 1741938 | CTD/STD cast | 2011-01-12 13:57Z to 2011-01-12 14:24Z | 53° 32' S, 38° 6' W | Click for more |
| 1741951 | CTD/STD cast | 2011-01-13 11:12Z to 2011-01-13 11:21Z | 53° 45' S, 38° 58' W | Click for more |
| 1918944 | Single-beam echosounder | 2010-12-21 12:14:00Z to 2011-01-14 23:59:00Z | From 51° 41' S, 57° 49' W to 54° 3' S, 36° 10' W | Click for more |
| 1918956 | Meteorological data logger | 2010-12-21 12:14:00Z to 2011-01-14 23:59:00Z | From 51° 41' S, 57° 49' W to 54° 3' S, 36° 10' W | Click for more |
| 1918968 | Multiple instrument types | 2010-12-21 12:14:00Z to 2011-01-14 23:59:00Z | From 51° 41' S, 57° 49' W to 54° 3' S, 36° 10' W | Click for more |
Project Database
No data currently held for this cruise in the BODC Project Database
