CTD and bottle data from R/V Roger Revelle RR1202 in the Southern Ocean (30-60S) in 2012 (Great Calcite Belt project)

Website: https://www.bco-dmo.org/dataset/474156
Version: 08 Jaunuary 2014
Version Date: 2014-01-08

» The Great Southern Coccolithophore Belt (Great Calcite Belt)
Balch, William M.Bigelow Laboratory for Ocean SciencesPrincipal Investigator, Contact
Gegg, Stephen R.Woods Hole Oceanographic Institution (WHOI BCO-DMO)BCO-DMO Data Manager

Dataset Description

CTD Bottle Data - RR1202

Acquisition Description

* Sea-Bird SBE 9 Data File:
* FileName = C:\CTD\RR1202\RR1202-00101.hex
* Software Version Seasave V 7.21d
* Temperature SN = 4941
* Conductivity SN = 1879
* Number of Bytes Per Scan = 40
* Number of Voltage Words = 5
* Number of Scans Averaged by the Deck Unit = 1
* System UpLoad Time = Feb 20 2012 06:06:55
* NMEA Latitude = 35 30.41 S
* NMEA Longitude = 037 27.50 E
* NMEA UTC (Time) = Feb 20 2012  06:06:49
* Store Lat/Lon Data = Append to Every Scan
** RR1202 RR1202
** Great Belt 2 Great Belt 2
** Latitude 35o 30.418S
** Longitude 037o 27.521E
** Event # 20120510602
** Great Belt II first CTD cast!!
* System UTC = Feb 20 2012 06:06:55
# interval = seconds: 0.0416667
# start_time = Feb 20 2012 06:06:49 [NMEA time, header]
# <Sensors count="15" >
#   <sensor Channel="1" >
#     <!-- Frequency 0, Temperature -->
#     <TemperatureSensor SensorID="55" >
#       <SerialNumber>4941</SerialNumber>
#       <CalibrationDate>22-Nov-2011 </CalibrationDate>
#       <UseG_J>1</UseG_J>
#       <A>4.35132730e-003</A>
#       <B>6.42190077e-004</B>
#       <C>2.13259987e-005</C>
#       <D>1.67064322e-006</D>
#       <F0_Old>1000.000</F0_Old>
#       <G>4.35113101e-003</G>
#       <H>6.41979575e-004</H>
#       <I>2.12937606e-005</I>
#       <J>1.66918567e-006</J>
#       <F0>1000.000</F0>
#       <Slope>1.00000000</Slope>
#       <Offset>0.0000</Offset>
#     </TemperatureSensor>
#   </sensor>
#   <sensor Channel="2" >
#     <!-- Frequency 1, Conductivity -->
#     <ConductivitySensor SensorID="3" >
#       <SerialNumber>1879</SerialNumber>
#       <CalibrationDate>29-Nov-11</CalibrationDate>
#       <UseG_J>1</UseG_J>
#       <!-- Cell const and series R are applicable only for wide range sensors. -->
#       <SeriesR>0.0000</SeriesR>
#       <CellConst>2000.0000</CellConst>
#       <ConductivityType>0</ConductivityType>
#       <Coefficients equation="0" >
#         <A>0.00000000e+000</A>
#         <B>0.00000000e+000</B>
#         <C>0.00000000e+000</C>
#         <D>0.00000000e+000</D>
#         <M>0.0</M>
#         <CPcor>-9.57000000e-008</CPcor>
#       </Coefficients>
#       <Coefficients equation="1" >
#         <G>-4.15590326e+000</G>
#         <H>5.39097077e-001</H>
#         <I>-7.71437706e-004</I>
#         <J>6.72579504e-005</J>
#         <CPcor>-9.57000000e-008</CPcor>
#         <CTcor>3.2500e-006</CTcor>
#         <!-- WBOTC not applicable unless ConductivityType = 1. -->
#         <WBOTC>0.00000000e+000</WBOTC>
#       </Coefficients>
#       <Slope>1.00000000</Slope>
#       <Offset>0.00000</Offset>
#     </ConductivitySensor>
#   </sensor>
#   <sensor Channel="3" >
#     <!-- Frequency 2, Pressure, Digiquartz with TC -->
#     <PressureSensor SensorID="45" >
#       <SerialNumber>0401</SerialNumber>
#       <CalibrationDate>02-Dec-11</CalibrationDate>
#       <C1>-4.588163e+004</C1>
#       <C2>1.989810e-001</C2>
#       <C3>1.408190e-002</C3>
#       <D1>3.950300e-002</D1>
#       <D2>0.000000e+000</D2>
#       <T1>2.998526e+001</T1>
#       <T2>-2.557400e-004</T2>
#       <T3>4.268350e-006</T3>
#       <T4>1.671990e-009</T4>
#       <Slope>0.99997494</Slope>
#       <Offset>1.74668</Offset>
#       <T5>0.000000e+000</T5>
#       <AD590M>1.117000e-002</AD590M>
#       <AD590B>-8.668320e+000</AD590B>
#     </PressureSensor>
#   </sensor>
#   <sensor Channel="4" >
#     <!-- Frequency 3, Temperature, 2 -->
#     <TemperatureSensor SensorID="55" >
#       <SerialNumber>4943</SerialNumber>
#       <CalibrationDate>22-Nov-2011 </CalibrationDate>
#       <UseG_J>1</UseG_J>
#       <A>4.37964247e-003</A>
#       <B>6.41168176e-004</B>
#       <C>2.24890121e-005</C>
#       <D>2.09823639e-006</D>
#       <F0_Old>1000.000</F0_Old>
#       <G>4.37943702e-003</G>
#       <H>6.40956250e-004</H>
#       <I>2.24569681e-005</I>
#       <J>2.09677218e-006</J>
#       <F0>1000.000</F0>
#       <Slope>1.00000000</Slope>
#       <Offset>0.0000</Offset>
#     </TemperatureSensor>
#   </sensor>
#   <sensor Channel="5" >
#     <!-- Frequency 4, Conductivity, 2 -->
#     <ConductivitySensor SensorID="3" >
#       <SerialNumber>1919</SerialNumber>
#       <CalibrationDate>29-Nov-11</CalibrationDate>
#       <UseG_J>1</UseG_J>
#       <!-- Cell const and series R are applicable only for wide range sensors. -->
#       <SeriesR>0.0000</SeriesR>
#       <CellConst>2000.0000</CellConst>
#       <ConductivityType>0</ConductivityType>
#       <Coefficients equation="0" >
#         <A>0.00000000e+000</A>
#         <B>0.00000000e+000</B>
#         <C>0.00000000e+000</C>
#         <D>0.00000000e+000</D>
#         <M>0.0</M>
#         <CPcor>-9.57000000e-008</CPcor>
#       </Coefficients>
#       <Coefficients equation="1" >
#         <G>-3.99251720e+000</G>
#         <H>5.25640038e-001</H>
#         <I>-9.93453447e-004</I>
#         <J>7.87689910e-005</J>
#         <CPcor>-9.57000000e-008</CPcor>
#         <CTcor>3.2500e-006</CTcor>
#         <!-- WBOTC not applicable unless ConductivityType = 1. -->
#         <WBOTC>0.00000000e+000</WBOTC>
#       </Coefficients>
#       <Slope>1.00000000</Slope>
#       <Offset>0.00000</Offset>
#     </ConductivitySensor>
#   </sensor>
#   <sensor Channel="6" >
#     <!-- A/D voltage 0, Fluorometer, Seapoint -->
#     <FluoroSeapointSensor SensorID="11" >
#       <SerialNumber>SCF 3003</SerialNumber>
#       <CalibrationDate></CalibrationDate>
#       <!-- The following is an array index, not the actual gain setting. -->
#       <GainSetting>2</GainSetting>
#       <Offset>0.000</Offset>
#     </FluoroSeapointSensor>
#   </sensor>
#   <sensor Channel="7" >
#     <!-- A/D voltage 1, PAR/Irradiance, Biospherical/Licor -->
#     <PAR_BiosphericalLicorChelseaSensor SensorID="42" >
#       <SerialNumber>4643</SerialNumber>
#       <CalibrationDate>14 Dec 2009</CalibrationDate>
#       <M>1.00000000</M>
#       <B>0.00000000</B>
#       <CalibrationConstant>1324503311.26000000</CalibrationConstant>
#       <Multiplier>1.00000000</Multiplier>
#       <Offset>-1.06070000</Offset>
#     </PAR_BiosphericalLicorChelseaSensor>
#   </sensor>
#   <sensor Channel="8" >
#     <!-- A/D voltage 2, Transmissometer, Chelsea/Seatech -->
#     <TransChelseaSeatechWetlabCStarSensor SensorID="59" >
#       <SerialNumber>CST-1189DR</SerialNumber>
#       <CalibrationDate>2008 Nov 3</CalibrationDate>
#       <M>19.3070</M>
#       <B>-1.1970</B>
#       <PathLength>0.250</PathLength>
#     </TransChelseaSeatechWetlabCStarSensor>
#   </sensor>
#   <sensor Channel="9" >
#     <!-- A/D voltage 3, Free -->
#   </sensor>
#   <sensor Channel="10" >
#     <!-- A/D voltage 4, Altimeter -->
#     <AltimeterSensor SensorID="0" >
#       <SerialNumber>41832</SerialNumber>
#       <CalibrationDate></CalibrationDate>
#       <ScaleFactor>15.000</ScaleFactor>
#       <Offset>0.020</Offset>
#     </AltimeterSensor>
#   </sensor>
#   <sensor Channel="11" >
#     <!-- A/D voltage 5, Free -->
#   </sensor>
#   <sensor Channel="12" >
#     <!-- A/D voltage 6, Oxygen, SBE 43 -->
#     <OxygenSensor SensorID="38" >
#       <SerialNumber>1129</SerialNumber>
#       <CalibrationDate>23-Nov-11</CalibrationDate>
#       <Use2007Equation>1</Use2007Equation>
#       <CalibrationCoefficients equation="0" >
#         <!-- Coefficients for Owens-Millard equation. -->
#         <Boc>0.0000</Boc>
#         <Soc>0.0000e+000</Soc>
#         <offset>0.0000</offset>
#         <Pcor>0.00e+000</Pcor>
#         <Tcor>0.0000</Tcor>
#         <Tau>0.0</Tau>
#       </CalibrationCoefficients>
#       <CalibrationCoefficients equation="1" >
#         <!-- Coefficients for Sea-Bird equation - SBE calibration in 2007 and later. -->
#         <Soc>5.0382e-001</Soc>
#         <offset>-0.5242</offset>
#         <A>-3.1601e-003</A>
#         <B> 1.0886e-004</B>
#         <C>-2.1050e-006</C>
#         <D0> 2.5826e+000</D0>
#         <D1> 1.92634e-004</D1>
#         <D2>-4.64803e-002</D2>
#         <E> 3.6000e-002</E>
#         <Tau20> 2.2400</Tau20>
#         <H1>-3.3000e-002</H1>
#         <H2> 5.0000e+003</H2>
#         <H3> 1.4500e+003</H3>
#       </CalibrationCoefficients>
#     </OxygenSensor>
#   </sensor>
#   <sensor Channel="13" >
#     <!-- A/D voltage 7, Free -->
#   </sensor>
#   <sensor Channel="14" >
#     <!-- SPAR voltage, Unavailable -->
#   </sensor>
#   <sensor Channel="15" >
#     <!-- SPAR voltage, SPAR/Surface Irradiance -->
#     <SPAR_Sensor SensorID="51" >
#       <SerialNumber></SerialNumber>
#       <CalibrationDate></CalibrationDate>
#       <ConversionFactor>0.00000000</ConversionFactor>
#       <RatioMultiplier>0.00000000</RatioMultiplier>
#     </SPAR_Sensor>
#   </sensor>
# </Sensors>
# datcnv_date = Jun 19 2012 09:53:45, 7.21k
# datcnv_in = C:\CTD\rr1202\rr1202-00101.hex C:\CTD\rr1202\rr1202-00101.CON
# datcnv_ox_hysteresis_correction = yes
# datcnv_bottle_scan_range_source = scans marked with bottle confirm bit, 0, 2
# datcnv_scans_per_bottle = 49
# bottlesum_date = Jun 20 2012 07:58:19, 7.21k
# bottlesum_in = C:\ctd\processing\process\rr1202-00101.ros C:\ctd\processing\process\rr1202-00101.CON

Processing Description

BCO-DMO Processing Notes
- Awk written to reformat original .btl files contributed by Bruce Bowler
- AWK: CTDbtl_2_BCODMO_RR1202.awk
- Header data for CTD data generated from .btl file headers
- space delimited reformatted to tab delimited
- all records with "#" or "*" ignored
- blank lines ignored
- BCO-DMO header o/p from routine

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DataFileCTD .btl Data File text
EventEvent dimensionless
StationStation Number dimensionless
CastCast Number dimensionless
LatitudeStation Latitude Position (South is negative) decimal degrees
LongitudeStation Longitude Position (West is negative) decimal degrees
Bottle_PositionBottle Position dimensionless
Date_BottleDate Bottle (UTC) YYYYMMDD
Time_BottleTime Bottle (UTC) HHMMSS
Density00_avgDensity density avg Kg/m^3
sigma_e00_avgDensity sigma-theta avg Kg/m^3
Density11_avgDensity 2 density avg Kg/m^3
sigma_e11_avgDensity 2 sigma-theta avg Kg/m^3
Sal00_avgSalinity Practical avg PSU
Sal11_avgSalinity Practical 2 avg PSU
Scan_avgScan avg dimensionless
Scan_sdevScan sdev dimensionless
PrDM_avgPressure Digiquartz avg db
PrDM_sdevPressure Digiquartz sdev db
DepSM_avgDepth salt water avg m
DepSM_sdevDepth salt water sdev m
T090C_avgTemperature ITS-90 avg deg C
T090C_sdevTemperature ITS-90 sdev deg C
C0S_m_avgConductivity avg S/m
C0S_m_sdevConductivity sdev S/m
T190C_avgTemperature 2 ITS-90 avg deg C
T190C_sdevTemperature 2 ITS-90 sdev deg C
C1S_m_avgConductivity 2 avg S/m
C1S_m_sdevConductivity 2 sdev S/m
Sbeox0V_avgOxygen raw SBE 43 avg Volts
Sbeox0V_sdevOxygen raw SBE 43 sdev Volts
Bat_avgBeam Attenuation Chelsea/Seatech/WET Labs CStar avg 1/m
Bat_sdevBeam Attenuation Chelsea/Seatech/WET Labs CStar sdev 1/m
FlSP_avgFluorescence Seapoint avg volts
FlSP_sdevFluorescence Seapoint sdev volts
Par_avgPAR/Irradiance Biospherical/Licor avg uEinsteins/m2/s
Par_sdevPAR/Irradiance Biospherical/Licor sdev uEinsteins/m2/s
ISO_DateTime_UTCDate and time (UTC) formatted to ISO 8601:2004(E) standard. The standard takes on the form: YYYY-MM-DDTHH:MM:SS[.xx]Z where the T indicates the start of the time string and Z indicates UTC (example: 2009-08-30T14:05:00.00Z) YYYY-MM-DDTHH:MM:SS[.xx]Z

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Dataset-specific Instrument Name
Niskin bottle
Generic Instrument Name
Niskin bottle
Generic Instrument Description
A Niskin bottle (a next generation water sampler based on the Nansen bottle) is a cylindrical, non-metallic water collection device with stoppers at both ends. The bottles can be attached individually on a hydrowire or deployed in 12, 24, or 36 bottle Rosette systems mounted on a frame and combined with a CTD. Niskin bottles are used to collect discrete water samples for a range of measurements including pigments, nutrients, plankton, etc.

Dataset-specific Instrument Name
LI-COR Biospherical PAR
Generic Instrument Name
LI-COR Biospherical PAR Sensor
Generic Instrument Description
The LI-COR Biospherical PAR Sensor is used to measure Photosynthetically Available Radiation (PAR) in the water column. This instrument designation is used when specific make and model are not known.

Dataset-specific Instrument Name
Fluorometer - Seapoint
Generic Instrument Name
Generic Instrument Description
A fluorometer or fluorimeter is a device used to measure parameters of fluorescence: its intensity and wavelength distribution of emission spectrum after excitation by a certain spectrum of light. The instrument is designed to measure the amount of stimulated electromagnetic radiation produced by pulses of electromagnetic radiation emitted into a water sample or in situ.

Dataset-specific Instrument Name
Generic Instrument Name
Sea-Bird SBE 43 Dissolved Oxygen Sensor
Generic Instrument Description
The Sea-Bird SBE 43 dissolved oxygen sensor is a redesign of the Clark polarographic membrane type of dissolved oxygen sensors. more information from Sea-Bird Electronics

Dataset-specific Instrument Name
CTD SBE 911plus
Generic Instrument Name
CTD Sea-Bird SBE 911plus
Generic Instrument Description
The Sea-Bird SBE 911plus is a type of CTD instrument package for continuous measurement of conductivity, temperature and pressure. The SBE 911plus includes the SBE 9plus Underwater Unit and the SBE 11plus Deck Unit (for real-time readout using conductive wire) for deployment from a vessel. The combination of the SBE 9plus and SBE 11plus is called a SBE 911plus. The SBE 9plus uses Sea-Bird's standard modular temperature and conductivity sensors (SBE 3plus and SBE 4). The SBE 9plus CTD can be configured with up to eight auxiliary sensors to measure other parameters including dissolved oxygen, pH, turbidity, fluorescence, light (PAR), light transmission, etc.). more information from Sea-Bird Electronics

Dataset-specific Instrument Name
Generic Instrument Name
Wet Labs CSTAR Transmissometer
Generic Instrument Description
A highly integrated opto-electronic design to provide a low cost, compact solution for underwater measurements of beam transmittance. The instrument is capable of either free space measurements, or through the use of an optical flow tube, flow-through sampling with a pump. It can be used in profiling, moored, or underway applications. more information from Wet Labs

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R/V Roger Revelle
Start Date
End Date
Original data are available from the NSF R2R data catalog

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Project Information

The Great Southern Coccolithophore Belt (Great Calcite Belt)

Coverage: Southern Ocean. 60W to 120E; 30S to 60S;

Collaborative Research: The Great Southern Coccolithophore Belt

Intellectual merit: Recent advances in satellite remote sensing enable estimation of suspended calcium carbonate (particulate inorganic carbon or 'PIC') from space. This radiative approach is operationally specific to marine coccolithophores (Haptophyceae) and sensitive enough to quantify PIC concentrations in oligotrophic gyres. Global images of suspended PIC taken over the seven years of the MODIS Aqua mission show a 'Great Belt' of PIC near the sub-Antarctic front of the Southern Ocean that circles the globe. This feature occurs every year during austral summer and appears to be within the high-nutrient, low chlorophyll region of the Southern Ocean. The area of the Great Belt is ~88 million km2, 26% of the global ocean. Evidence from several cruises into the Great Belt region of the Atlantic, Indian and Pacific sectors has verified elevated concentrations of coccolithophores; previous work in the Atlantic sector verified high optical scattering from PIC. The few ship observations we have are entirely consistent with the satellite views. In this project, the investigators will systematically study the coccolithophores of the Great Belt guided by the following science goals: (a) identify the coccolithophore species within this belt; (b) measure the abundance of coccolithophores and associated PIC; (c) measure coccolithopore calcification rates; (d) elucidate factors that may limit coccolithophore latitudinal range (e.g. stratification, temperature, macronutrients, trace metals, grazing); (e) demonstrate whether the variability in PIC relates to shallow export flux; (f) define how variability in PIC production relates to the pCO2, total alkalinity and dissolved inorganic carbon budgets; and (g) examine the impact of short-term ocean acidification on coccolithophore growth and calcite dissolution.

The research will involve cruises along the 50 S parallel to sample the Great Belt, during the austral summer. The investigators will use a combination of underway surface sampling (primarily optical and hydrographic) and vertical station profiles (using CTD/rosette and large volume submersible pumps) to address hypotheses related to the above goals. The cruise track will elucidate both zonal and meridional variability in the Great Belt. Controlled carboy incubation experiments will examine the impact of ocean acidification at various future scenarios on coccolithophore growth and dissolution. Dilution experiments will address grazing-related mortality and dissolution questions. Controlled metal-addition incubations will focus on potential iron, zinc and cobalt limitation of the coccolithophores or competition from diatoms related to silica availability. The proposed field observations and metal-addition experiments will provide important information on the current status of the Great Belt in the context of global biogeochemistry. The ocean acidification experiments to be undertaken are more forward-looking in terms of the fate of the Southern Ocean coccolithophores in a future acidified ocean.

Broader impacts: The globally significant size of the Great Belt indicates that it likely plays a major role in global biogeochemistry and climate change feedbacks. Thus, the investigators expect this work to have broad, transformative impacts in biological and chemical oceanography. Ocean acidification from the burning of fossil fuels is predicted to lower the pH of the surface ocean by 0.3 units in the next century and up to 0.7 units - a 5-fold increase in the proton concentration by the year 2300. A major goal of this study is to examine the effects of ocean acidification on coccolithophores in a region of low calcite saturation (i.e., one of the first regions expected to become sub-saturating for calcite). The results of these experiments will therefore be highly relevant to our basic understanding of the marine carbon cycle. Related to career development and Criterion II activities, the project includes field experience on two cruises for NSF REU undergraduates from Maine universities or colleges, providing funds for them to attend a scientific meeting. Participation of undergraduate students from Maine colleges builds capacity in our rural coastal state and helps thwart the serious issue of 'brain drain', in which the best students are leaving Maine to seek opportunity in wealthier, more populated states. A teacher will also participate on the cruises (via the NSF-sponsored ARMADA program). This teacher will develop learning modules for students about such topics as coccolithophores, calcification, export production, metal-plankton interactions, ocean acidification and climate change.

Balch, WM; Drapeau, DT; Bowler, BC; Lyczskowski, E; Booth, ES; Alley, D. "The contribution of coccolithophores to the optical and inorganic carbon budgets during the Southern Ocean Gas Exchange Experiment: New evidence in support of the "Great Calcite Belt" hypothesis," JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS, v.116, 2011. View record at Web of Science

Poulton, AJ; Young, JR; Bates, NR; Balch, WM. "Biometry of detached Emiliania huxleyi coccoliths along the Patagonian Shelf," MARINE ECOLOGY-PROGRESS SERIES, v.443, 2011, p. 1. View record at Web of Science

Brown, Michael S, W. Balch, S. Craig, B. Bowler, D. Drapeau, J. Grant. "Optical closure within a Patagonian Shelf coccolithhophore bloom", 06/01/2011-05/31/2012,  2012, "ACCESS'12. Atlantic Canada Coastal & Estuarine Science Society. Dalhousie University, Halifax, Nova Scotia. 10-13 May, 2012.".

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Funding SourceAward
NSF Division of Ocean Sciences (NSF OCE)

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