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Title Sum-
Institution Dataset ID
     data   graph     files  public CTD data from 9 casts at the oxygen-deficient zone of the Eastern Tropical North
Pacific (ETNP), RV/Atlantis cruise AT37-12, April-May 2017
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The Dataset's Variables and Attributes

Row Type Variable Name Attribute Name Data Type Value
attribute NC_GLOBAL access_formats String .htmlTable,.csv,.json,.mat,.nc,.tsv,.esriCsv,.geoJson
attribute NC_GLOBAL acquisition_description String Header information from Sea-Bird SBE 9 data files (sample from cast 1):
* Sea-Bird SBE 9 Data File:
* FileName = C:\\\data\\\ctd\\\at3712001.hdr
* Software Version Seasave V 7.23.2
* Temperature SN = 4303
* Conductivity SN = 3009
* Number of Bytes Per Scan = 40
* Number of Voltage Words = 5
* Number of Scans Averaged by the Deck Unit = 1
* System UpLoad Time = Apr 25 2017 14:19:16
* NMEA Latitude = 14 01.97 N
* NMEA Longitude = 104 20.66 W
* NMEA UTC (Time) = Apr 25 2017 14:19:00
* Store Lat/Lon Data = Append to Every Scan
* System UTC = Apr 25 2017 14:19:16
# nquan = 26
# nvalues = 3003
# units = specified

# name 0 = timeS: Time, Elapsed [seconds]
# name 1 = longitude: Longitude [deg]
# name 2 = latitude: Latitude [deg]
# name 3 = prDM: Pressure, Digiquartz [db]
# name 4 = t090C: Temperature [ITS-90, deg C]
# name 5 = t190C: Temperature, 2 [ITS-90, deg C]
# name 6 = c0S/m: Conductivity [S/m]
# name 7 = c1S/m: Conductivity, 2 [S/m]
# name 8 = CStarTr0: Beam Transmission, WET Labs C-Star [%]
# name 9 = flECO-AFL: Fluorescence, WET Labs ECO-AFL/FL [mg/m^3]
# name 10 = turbWETntu0: Turbidity, WET Labs ECO [NTU]
# name 11 = sbeox0V: Oxygen raw, SBE 43 [V]
# name 12 = altM: Altimeter [m]
# name 13 = nbf: Bottles Fired
# name 14 = spar: SPAR/Surface Irradiance
# name 15 = T2-T190C: Temperature Difference, 2 - 1 [ITS-90, deg C]
# name 16 = depSM: Depth [salt water, m], lat = 14.0328
# name 17 = density00: Density [density, kg/m^3]
# name 18 = density11: Density, 2 [density, kg/m^3]
# name 19 = sal00: Salinity, Practical [PSU]
# name 20 = sal11: Salinity, Practical, 2 [PSU]
# name 21 = svCM: Sound Velocity [Chen-Millero, m/s]
# name 22 = svCM1: Sound Velocity, 2 [Chen-Millero, m/s]
# name 23 = sbeox0Mm/L: Oxygen, SBE 43 [umol/l], WS = 2
# name 24 = dz/dtM: Descent Rate [m/s], WS = 2
# name 25 = flag: flag

# span 0 = 10.777, 6384.982
# span 1 = -104.34815, -104.34439
# span 2 = 14.02820, 14.03274
# span 3 = 2.012, 1517.275
# span 4 = 3.0261, 29.5506
# span 5 = 3.0246, 29.5499
# span 6 = 3.203151, 5.633423
# span 7 = 3.202059, 5.631726
# span 8 = 97.9989, 100.2511
# span 9 = -0.0468, 1.1713
# span 10 = -0.1532, -0.1508
# span 11 = 0.5349, 2.6302
# span 12 = 19.15, 103.34
# span 13 = 0, 23
# span 14 = 3.2622e+00, 6.3235e+00
# span 15 = -0.5208, 0.1394
# span 16 = 2.000, 1503.000
# span 17 = 1021.1002, 1034.5674
# span 18 = 1021.0921, 1034.5583
# span 19 = 33.7034, 34.8581
# span 20 = 33.6949, 34.8381
# span 21 = 1485.17, 1543.87
# span 22 = 1485.17, 1543.86
# span 23 = 0.417, 206.650
# span 24 = -1.760, 1.703
# span 25 = 0.0000e+00, 0.0000e+00

# interval = meters: 1
# start_time = Apr 25 2017 14:19:00 [NMEA time, header]
# bad_flag = -9.990e-29

# <Sensors count="15" >
# <sensor Channel="1" >
# <!-- Frequency 0, Temperature -->
# <TemperatureSensor SensorID="55" >
# <SerialNumber>4303</SerialNumber>
# <CalibrationDate>20-Jan-16</CalibrationDate>
# <UseG_J>1</UseG_J>
# <A>0.00000000e+000</A>
# <B>0.00000000e+000</B>
# <C>0.00000000e+000</C>
# <D>0.00000000e+000</D>
# <F0_Old>0.000</F0_Old>
# <G>4.38501054e-003</G>
# <H>6.47529902e-004</H>
# <I>2.19462935e-005</I>
# <J>1.64955605e-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>3009</SerialNumber>
# <CalibrationDate>20-Jan-16</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>-1.04864981e+001</G>
# <H>1.48778269e+000</H>
# <I>3.67673536e-004</I>
# <J>5.06417242e-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>0749</SerialNumber>
# <CalibrationDate>08-Apr-14</CalibrationDate>
# <C1>-4.970438e+004</C1>
# <C2>-4.005750e-001</C2>
# <C3>1.365700e-002</C3>
# <D1>3.669600e-002</D1>
# <D2>0.000000e+000</D2>
# <T1>3.027760e+001</T1>
# <T2>-4.522040e-004</T2>
# <T3>4.002070e-006</T3>
# <T4>1.971140e-009</T4>
# <Slope>0.99992397</Slope>
# <Offset>-1.86008</Offset>
# <T5>0.000000e+000</T5>
# <AD590M>1.283700e-002</AD590M>
# <AD590B>-8.706643e+000</AD590B>
# </PressureSensor>
# </sensor>

# <sensor Channel="4" >
# <!-- Frequency 3, Temperature, 2 -->
# <TemperatureSensor SensorID="55" >
# <SerialNumber>4360</SerialNumber>
# <CalibrationDate>20-Jan-16</CalibrationDate>
# <UseG_J>1</UseG_J>
# <A>0.00000000e+000</A>
# <B>0.00000000e+000</B>
# <C>0.00000000e+000</C>
# <D>0.00000000e+000</D>
# <F0_Old>0.000</F0_Old>
# <G>4.36265052e-003</G>
# <H>6.49800036e-004</H>
# <I>2.30621342e-005</I>
# <J>1.84888934e-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>2707</SerialNumber>
# <CalibrationDate>20-Jan-16</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>-1.07265688e+001</G>
# <H>1.55946953e+000</H>
# <I>-1.31572164e-003</I>
# <J>1.86775491e-004</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, Oxygen, SBE 43 -->
# <OxygenSensor SensorID="38" >
# <SerialNumber>0072</SerialNumber>
# <CalibrationDate>16-Jan-16</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>4.8025e-001</Soc>
# <offset>-0.5316</offset>
# <A>-4.2594e-003</A>
# <B> 2.1935e-004</B>
# <C>-3.0959e-006</C>
# <D0> 2.5826e+000</D0>
# <D1> 1.92634e-004</D1>
# <D2>-4.64803e-002</D2>
# <E> 3.6000e-002</E>
# <Tau20> 2.5000</Tau20>
# <H1>-3.3000e-002</H1>
# <H2> 5.0000e+003</H2>
# <H3> 1.4500e+003</H3>
# </CalibrationCoefficients>
# </OxygenSensor>
# </sensor>

# <sensor Channel="7" >
# <!-- A/D voltage 1, Free -->
# </sensor>

# <sensor Channel="8" >
# <!-- A/D voltage 2, Free -->
# </sensor>

# <sensor Channel="9" >
# <!-- A/D voltage 3, Transmissometer, WET Labs C-Star -->
# <WET_LabsCStar SensorID="71" >
# <SerialNumber>CST-1117</SerialNumber>
# <CalibrationDate>20May15, Field 8Mar17</CalibrationDate>
# <M>20.9850</M>
# <B>-0.1538</B>
# <PathLength>0.250</PathLength>
# </WET_LabsCStar>
# </sensor>

# <sensor Channel="10" >
# <!-- A/D voltage 4, Fluorometer, WET Labs ECO-AFL/FL -->
# <FluoroWetlabECO_AFL_FL_Sensor SensorID="20" >
# <SerialNumber>FLTURT-1013</SerialNumber>
# <CalibrationDate>2014-April-25</CalibrationDate>
# <ScaleFactor>6.00000000e+000</ScaleFactor>
# <!-- Dark output -->
# <Vblank>0.0870</Vblank>
# </FluoroWetlabECO_AFL_FL_Sensor>
# </sensor>

# <sensor Channel="11" >
# <!-- A/D voltage 5, Turbidity Meter, WET Labs, ECO-NTU -->
# <TurbidityMeter SensorID="67" >
# <SerialNumber>FLTURT-1013</SerialNumber>
# <CalibrationDate>2014 April 25</CalibrationDate>
# <ScaleFactor>0.080000</ScaleFactor>
# <!-- Dark output -->
# <DarkVoltage>2.000000</DarkVoltage>
# </TurbidityMeter>
# </sensor>

# <sensor Channel="12" >
# <!-- A/D voltage 6, Altimeter -->
# <AltimeterSensor SensorID="0" >
# <SerialNumber>PSA916-40852</SerialNumber>
# <CalibrationDate></CalibrationDate>
# <ScaleFactor>15.000</ScaleFactor>
# <Offset>0.000</Offset>
# </AltimeterSensor>
# </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>16500</SerialNumber>
# <CalibrationDate>March 28, 2013</CalibrationDate>
# <ConversionFactor>1641.85000000</ConversionFactor>
# <RatioMultiplier>1.00000000</RatioMultiplier>
# </SPAR_Sensor>
# </sensor>
# </Sensors>

# datcnv_date = Apr 25 2017 16:08:39, 7.23.2 [datcnv_vars = 16]
# datcnv_in = c:\\\data\\\ctd\\\at3712001.hex
# datcnv_skipover = 0
# datcnv_ox_hysteresis_correction = yes

# wildedit_date = Apr 25 2017 16:08:50, 7.23.2
# wildedit_in = c:\\\data\\\ctd\\\process\\\at3712001.cnv
# wildedit_pass1_nstd = 2.0
# wildedit_pass2_nstd = 20.0
# wildedit_pass2_mindelta = 2.000e+000
# wildedit_npoint = 100
# wildedit_vars = longitude latitude prDM t090C t190C c0S/m c1S/m CStarTr0
flECO-AFL turbWETntu0 sbeox0V altM spar T2-T190C
# wildedit_excl_bad_scans = yes
# alignctd_date = Apr 25 2017 16:08:57, 7.23.2
# alignctd_in = c:\\\data\\\ctd\\\process\\\at3712001.cnv
# alignctd_adv = c0S/m 0.073, c1S/m 0.073, sbeox0V 2.000
# celltm_date = Apr 25 2017 16:09:07, 7.23.2
# celltm_in = c:\\\data\\\ctd\\\process\\\at3712001.cnv
# celltm_alpha = 0.0300, 0.0300
# celltm_tau = 7.0000, 7.0000
# celltm_temp_sensor_use_for_cond = primary, secondary
# Derive_date = Apr 25 2017 16:09:13, 7.23.2 [derive_vars = 9]
# Derive_in = c:\\\data\\\ctd\\\process\\\at3712001.cnv
# derive_time_window_docdt = seconds: 2
# derive_ox_tau_correction = no
# derive_time_window_dzdt = seconds: 2
# binavg_date = Apr 25 2017 16:09:19, 7.23.2
# binavg_in = c:\\\data\\\ctd\\\process\\\at3712001.cnv
# binavg_bintype = meters
# binavg_binsize = 1
# binavg_excl_bad_scans = yes
# binavg_skipover = 0
# binavg_surface_bin = no, min = 1.000, max = 0.000, value = 0.000
# file_type = ascii

Further information on sensors:
attribute NC_GLOBAL awards_0_award_nid String 685780
attribute NC_GLOBAL awards_0_award_number String OCE-1559042
attribute NC_GLOBAL awards_0_data_url String http://www.nsf.gov/awardsearch/showAward.do?AwardNumber=1559042 (external link)
attribute NC_GLOBAL awards_0_funder_name String NSF Division of Ocean Sciences
attribute NC_GLOBAL awards_0_funding_acronym String NSF OCE
attribute NC_GLOBAL awards_0_funding_source_nid String 355
attribute NC_GLOBAL awards_0_program_manager String Michael E. Sieracki
attribute NC_GLOBAL awards_0_program_manager_nid String 50446
attribute NC_GLOBAL cdm_data_type String Other
attribute NC_GLOBAL comment String CTD Data from Cruise R/V Atlantis 37-12 (AT37-12)
PI: S. Sievert (WHOI), A. Babin (MIT)
Version: 2018-06-21
attribute NC_GLOBAL Conventions String COARDS, CF-1.6, ACDD-1.3
attribute NC_GLOBAL creator_email String info at bco-dmo.org
attribute NC_GLOBAL creator_name String BCO-DMO
attribute NC_GLOBAL creator_type String institution
attribute NC_GLOBAL creator_url String https://www.bco-dmo.org/ (external link)
attribute NC_GLOBAL data_source String extract_data_as_tsv version 2.3 19 Dec 2019
attribute NC_GLOBAL date_created String 2018-06-21T15:10:23Z
attribute NC_GLOBAL date_modified String 2020-01-03T17:00:53Z
attribute NC_GLOBAL defaultDataQuery String &amp;time&lt;now
attribute NC_GLOBAL doi String 10.1575/1912/bco-dmo.739098.1
attribute NC_GLOBAL Easternmost_Easting double -89.9996
attribute NC_GLOBAL geospatial_lat_max double 14.03048
attribute NC_GLOBAL geospatial_lat_min double 9.34142
attribute NC_GLOBAL geospatial_lat_units String degrees_north
attribute NC_GLOBAL geospatial_lon_max double -89.9996
attribute NC_GLOBAL geospatial_lon_min double -104.3462
attribute NC_GLOBAL geospatial_lon_units String degrees_east
attribute NC_GLOBAL geospatial_vertical_max double 3238.0
attribute NC_GLOBAL geospatial_vertical_min double 1.0
attribute NC_GLOBAL geospatial_vertical_positive String down
attribute NC_GLOBAL geospatial_vertical_units String m
attribute NC_GLOBAL infoUrl String https://www.bco-dmo.org/dataset/739098 (external link)
attribute NC_GLOBAL institution String BCO-DMO
attribute NC_GLOBAL instruments_0_acronym String CTD
attribute NC_GLOBAL instruments_0_dataset_instrument_nid String 739107
attribute NC_GLOBAL instruments_0_description String The Conductivity, Temperature, Depth (CTD) unit is an integrated instrument package designed to measure the conductivity, temperature, and pressure (depth) of the water column. The instrument is lowered via cable through the water column and permits scientists observe the physical properties in real time via a conducting cable connecting the CTD to a deck unit and computer on the ship. The CTD is often configured with additional optional sensors including fluorometers, transmissometers and/or radiometers. It is often combined with a Rosette of water sampling bottles (e.g. Niskin, GO-FLO) for collecting discrete water samples during the cast. This instrument designation is used when specific make and model are not known.
attribute NC_GLOBAL instruments_0_instrument_external_identifier String https://vocab.nerc.ac.uk/collection/L05/current/130/ (external link)
attribute NC_GLOBAL instruments_0_instrument_name String CTD profiler
attribute NC_GLOBAL instruments_0_instrument_nid String 417
attribute NC_GLOBAL instruments_0_supplied_name String Sea-Bird SBE 9
attribute NC_GLOBAL keywords String altimetry, altitude, atmosphere, bco, bco-dmo, biological, bottles, bottles_fired, chemical, cond, cond_2, data, dataset, date, density, density_2, depth, depth_bottom, descent, descent_rate, diff, dmo, earth, Earth Science > Atmosphere > Altitude > Station Height, elapsed, erddap, fired, flag, fluor, height, laboratory, lat_start, latitude, lon_start, longitude, management, O2, O2_v, oceanography, office, oxygen, preliminary, press, rate, sal, sal_2, satellite, science, sound, sound_vel, sound_vel_2, spar, start, station, temp_2, temp_diff, temperature, time, time_elapsed, time_start_UTC, trans, turbidity, v, vel
attribute NC_GLOBAL keywords_vocabulary String GCMD Science Keywords
attribute NC_GLOBAL license String https://www.bco-dmo.org/dataset/739098/license (external link)
attribute NC_GLOBAL metadata_source String https://www.bco-dmo.org/api/dataset/739098 (external link)
attribute NC_GLOBAL Northernmost_Northing double 14.03048
attribute NC_GLOBAL param_mapping String {'739098': {'depth': 'flag - depth', 'lon_start': 'flag - longitude', 'lat_start': 'flag - latitude'}}
attribute NC_GLOBAL parameter_source String https://www.bco-dmo.org/mapserver/dataset/739098/parameters (external link)
attribute NC_GLOBAL people_0_affiliation String Woods Hole Oceanographic Institution
attribute NC_GLOBAL people_0_affiliation_acronym String WHOI
attribute NC_GLOBAL people_0_person_name String Stefan M Sievert
attribute NC_GLOBAL people_0_person_nid String 51416
attribute NC_GLOBAL people_0_role String Principal Investigator
attribute NC_GLOBAL people_0_role_type String originator
attribute NC_GLOBAL people_1_affiliation String Massachusetts Institute of Technology
attribute NC_GLOBAL people_1_affiliation_acronym String MIT-EAPS
attribute NC_GLOBAL people_1_person_name String Andrew Babbin
attribute NC_GLOBAL people_1_person_nid String 738016
attribute NC_GLOBAL people_1_role String Co-Principal Investigator
attribute NC_GLOBAL people_1_role_type String originator
attribute NC_GLOBAL people_2_affiliation String Massachusetts Institute of Technology
attribute NC_GLOBAL people_2_affiliation_acronym String MIT-EAPS
attribute NC_GLOBAL people_2_person_name String Andrew Babbin
attribute NC_GLOBAL people_2_person_nid String 738016
attribute NC_GLOBAL people_2_role String Contact
attribute NC_GLOBAL people_2_role_type String related
attribute NC_GLOBAL people_3_affiliation String Woods Hole Oceanographic Institution
attribute NC_GLOBAL people_3_affiliation_acronym String WHOI BCO-DMO
attribute NC_GLOBAL people_3_person_name String Nancy Copley
attribute NC_GLOBAL people_3_person_nid String 50396
attribute NC_GLOBAL people_3_role String BCO-DMO Data Manager
attribute NC_GLOBAL people_3_role_type String related
attribute NC_GLOBAL project String vent O2 NO3 roles
attribute NC_GLOBAL projects_0_acronym String vent O2 NO3 roles
attribute NC_GLOBAL projects_0_description String NSF award abstract:
Deep-sea hydrothermal vents, first discovered in 1977, are exemplary ecosystems where microbial chemosynthesis rather than photosynthesis is the primary source of organic carbon. Chemosynthetic microorganisms use the energy generated by oxidizing reduced inorganic chemicals contained in the vent fluids, like hydrogen sulfide or hydrogen gas, to convert carbon dioxide (CO2) into cell material. By doing so, they effectively transfer the energy from a geothermal source to higher trophic levels, in the process supporting the unique and fascinating ecosystems that are characterized by high productivity - oases in the otherwise barren deep ocean landscape. While the general view of the functioning of these ecosystems is established, there are still major gaps in our understanding of the microbiology and biogeochemistry of these systems. Particularly lacking are studies measuring rates of microbial activity in situ, which is ultimately needed to understand production of these ecosystems and to assess their impact on global biogeochemical cycles. This project makes use of the Vent-Submersible Incubation Device (Vent-SID), a robotic micro-laboratory that was recently developed and tested in the field. This instrument makes it possible for the first time to determine rates of carbon fixation at both in situ pressures and temperatures, revolutionizing the way we conduct microbial biogeochemical investigations at deep-sea hydrothermal vents. This is an interdisciplinary and collaborative effort between two US and foreign institutions, creating unique opportunities for networking and to foster international collaborations. This will also benefit two graduate students working in the project, who will get exposed to a wide range of instrumentation and scientific fields, facilitating their interdisciplinary education. In collaboration with Dr. Nitzan Resnick, academic dean of The Sage School, an elementary school outreach program will be developed and a long-term partnership with the school established. Further, a cruise blog site to disseminate the research to schools and the broader public will be set up. The results will be the topic of media coverage as well as be integrated into coursework and webpages existing either in the PI's labs or at the institution.
This project is using a recently developed robotic micro-laboratory, the Vent-SID, to measure rates of chemoautotrophic production and to determine the relative importance of oxygen and nitrate in driving chemosynthesis at deep-sea hydrothermal vents at in situ pressures and temperatures and to tackle the following currently unresolved science objectives: 1) obtain in situ rates of chemoautotrophic carbon fixation, 2) obtain in situ nitrate reduction rate measurements, and 3) directly correlate the measurement of these processes with the expression of key genes involved in carbon and energy metabolism. Although recent data suggests that nitrate reduction either to N2 (denitrification) or to NH4+ (dissimilatory reduction of nitrate to ammonium) might be responsible for a significant fraction of chemoautotrophic production, NO3-reduction rates have never been measured in situ at hydrothermal vents. The researchers hypothesize that chemoautrophic growth is strongly coupled to nitrate respiration in vent microbial communities. During a cruise that will take place approximately 12 months into the project (~Feb 2017), the researchers will carry out a total of 4 deployments of the Vent-SID as well as ancillary sampling collection at the 9°46N to 9°53N segment of the East Pacific Rise. They will focus efforts on two diffuse-flow vent sites, "Crab Spa" and "Teddy Bear". "Crab Spa" is a diffuse flow vent site (T: 25°C) that has been used as a model system to gain insights into chemoautotrophic processes and has been frequently sampled over the last several years. This vent site has been very well characterized, both geochemically and microbiologically, providing excellent background data for the proposed process oriented studies. "Teddy Bear" is a diffuse-flow site that was discovered in Jan 2014, and it has a lower temperature (T: 12°C), making it a good comparative site. The researchers will perform a number of short duration time-course incubations to assess the role of different environmental parameters that have been identified as likely key variables (e.g., O2, temperature, NO3-), and to link these process rate measurements to the expression of functional genes using metatranscriptomic analyses. This study will be the first attempt to measure critical metabolic processes of hydrothermal vent microbial assemblages under critical in situ conditions and to assess the quantitative importance of electron donor and acceptor pathways in situ. In the future, it is envisioned that the Vent-SID will become a routine application by the oceanographic community for measuring time series rates of relevant metabolic processes at hydrothermal vents under in situ pressures and vent fluid temperatures.
attribute NC_GLOBAL projects_0_end_date String 2019-04
attribute NC_GLOBAL projects_0_geolocation String Deep-Sea hydrothermal vent field at 9 deg N on the East Pacific Rise
attribute NC_GLOBAL projects_0_name String Collaborative Research: Environmental Drivers of Chemoautotrophic Carbon Production at Deep-Sea Hydrothermal Vents - Comparative Roles of Oxygen and Nitrate
attribute NC_GLOBAL projects_0_project_nid String 685773
attribute NC_GLOBAL projects_0_start_date String 2016-05
attribute NC_GLOBAL publisher_name String Biological and Chemical Oceanographic Data Management Office (BCO-DMO)
attribute NC_GLOBAL publisher_type String institution
attribute NC_GLOBAL sourceUrl String (local files)
attribute NC_GLOBAL Southernmost_Northing double 9.34142
attribute NC_GLOBAL standard_name_vocabulary String CF Standard Name Table v55
attribute NC_GLOBAL summary String CTD data from Atlantis cruise AT37-12 in the Eastern Tropical North Pacific in April and May 2017. Data from 9 casts are included.
attribute NC_GLOBAL title String CTD data from 9 casts at the oxygen-deficient zone of the Eastern Tropical North Pacific (ETNP), RV/Atlantis cruise AT37-12, April-May 2017
attribute NC_GLOBAL version String 1
attribute NC_GLOBAL Westernmost_Easting double -104.3462
attribute NC_GLOBAL xml_source String osprey2erddap.update_xml() v1.3
variable station   byte  
attribute station _FillValue byte 127
attribute station actual_range byte 1, 10
attribute station bcodmo_name String station
attribute station description String station identifier
attribute station long_name String Station
attribute station units String unitless
variable date_start_UTC   String  
attribute date_start_UTC bcodmo_name String date
attribute date_start_UTC description String date [UTC] at start of cast formatted as yyyy-mm-dd
attribute date_start_UTC long_name String Date Start UTC
attribute date_start_UTC nerc_identifier String https://vocab.nerc.ac.uk/collection/P01/current/ADATAA01/ (external link)
attribute date_start_UTC source_name String date_start_UTC
attribute date_start_UTC time_precision String 1970-01-01
attribute date_start_UTC units String unitless
variable latitude   double  
attribute latitude _CoordinateAxisType String Lat
attribute latitude _FillValue double NaN
attribute latitude actual_range double 9.34142, 14.03048
attribute latitude axis String Y
attribute latitude bcodmo_name String lat_start
attribute latitude colorBarMaximum double 90.0
attribute latitude colorBarMinimum double -90.0
attribute latitude description String cast start latitude; north is positive
attribute latitude ioos_category String Location
attribute latitude long_name String Latitude
attribute latitude nerc_identifier String https://vocab.nerc.ac.uk/collection/P09/current/LATX/ (external link)
attribute latitude standard_name String latitude
attribute latitude units String degrees_north
variable longitude   double  
attribute longitude _CoordinateAxisType String Lon
attribute longitude _FillValue double NaN
attribute longitude actual_range double -104.3462, -89.9996
attribute longitude axis String X
attribute longitude bcodmo_name String lon_start
attribute longitude colorBarMaximum double 180.0
attribute longitude colorBarMinimum double -180.0
attribute longitude description String cast start longitude; east is positive
attribute longitude ioos_category String Location
attribute longitude long_name String Longitude
attribute longitude nerc_identifier String https://vocab.nerc.ac.uk/collection/P09/current/LONX/ (external link)
attribute longitude standard_name String longitude
attribute longitude units String degrees_east
variable depth_bottom   short  
attribute depth_bottom _FillValue short 32767
attribute depth_bottom actual_range short 2512, 3740
attribute depth_bottom bcodmo_name String depth_w
attribute depth_bottom colorBarMaximum double 8000.0
attribute depth_bottom colorBarMinimum double -8000.0
attribute depth_bottom colorBarPalette String TopographyDepth
attribute depth_bottom description String depth of water
attribute depth_bottom long_name String Depth
attribute depth_bottom standard_name String depth
attribute depth_bottom units String meters
variable time_start_UTC   String  
attribute time_start_UTC bcodmo_name String time_start
attribute time_start_UTC description String time [UTC] at start of cast formatted as HH:MM:SS
attribute time_start_UTC long_name String Time Start UTC
attribute time_start_UTC units String unitless
variable time_elapsed   double  
attribute time_elapsed _FillValue double NaN
attribute time_elapsed actual_range double -9.99E-29, 10968.605
attribute time_elapsed bcodmo_name String time_elapsed
attribute time_elapsed description String Number of seconds elapsed from the start of the cast. Originally named 'timeS'.
attribute time_elapsed long_name String Time Elapsed
attribute time_elapsed nerc_identifier String https://vocab.nerc.ac.uk/collection/P01/current/ELTMZZZZ/ (external link)
attribute time_elapsed units String seconds
variable lon   double  
attribute lon _FillValue double NaN
attribute lon actual_range double -104.34815, -9.99E-29
attribute lon bcodmo_name String latitude
attribute lon colorBarMaximum double 180.0
attribute lon colorBarMinimum double -180.0
attribute lon description String latitude; north is positive. Originally named 'latitude'.
attribute lon long_name String Longitude
attribute lon nerc_identifier String https://vocab.nerc.ac.uk/collection/P09/current/LATX/ (external link)
attribute lon standard_name String longitude
attribute lon units String decimal degrees
variable lat   float  
attribute lat _FillValue float NaN
attribute lat actual_range float -9.99E-29, 14.03274
attribute lat bcodmo_name String longitude
attribute lat colorBarMaximum double 90.0
attribute lat colorBarMinimum double -90.0
attribute lat description String longitude; east is positive. Originally named 'longitude'.
attribute lat long_name String Latitude
attribute lat nerc_identifier String https://vocab.nerc.ac.uk/collection/P09/current/LONX/ (external link)
attribute lat standard_name String latitude
attribute lat units String decimal degrees
variable press   float  
attribute press _FillValue float NaN
attribute press actual_range float -9.99E-29, 3281.7
attribute press bcodmo_name String pressure
attribute press description String Pressure. Originally named 'prDM'.
attribute press long_name String Press
attribute press nerc_identifier String https://vocab.nerc.ac.uk/collection/P01/current/PRESPR01/ (external link)
attribute press units String decibars
variable temp   float  
attribute temp _FillValue float NaN
attribute temp actual_range float -9.99E-29, 30.0737
attribute temp bcodmo_name String temperature
attribute temp description String Primary temperature measurement. Originally named 't090C'.
attribute temp long_name String Temperature
attribute temp nerc_identifier String https://vocab.nerc.ac.uk/collection/P01/current/TEMPP901/ (external link)
attribute temp units String degrees Celsius
variable temp_2   float  
attribute temp_2 _FillValue float NaN
attribute temp_2 actual_range float -9.99E-29, 30.0718
attribute temp_2 bcodmo_name String temperature
attribute temp_2 description String Secondary tempearture measurement. Originally named 't190C'.
attribute temp_2 long_name String Temp 2
attribute temp_2 nerc_identifier String https://vocab.nerc.ac.uk/collection/P01/current/TEMPP901/ (external link)
attribute temp_2 units String degrees Celsius
variable cond   float  
attribute cond _FillValue float NaN
attribute cond actual_range float -9.99E-29, 5.684972
attribute cond bcodmo_name String conductivity
attribute cond description String Primary conductivity measurement. Originally named 'c0S/m'.
attribute cond long_name String Cond
attribute cond nerc_identifier String https://vocab.nerc.ac.uk/collection/P02/current/CNDC/ (external link)
attribute cond units String Siemens/meter [S/m]
variable cond_2   float  
attribute cond_2 _FillValue float NaN
attribute cond_2 actual_range float -9.99E-29, 5.68213
attribute cond_2 bcodmo_name String conductivity
attribute cond_2 description String Secondary conductivity measurement. Originally named 'c1S/m'.
attribute cond_2 long_name String Cond 2
attribute cond_2 nerc_identifier String https://vocab.nerc.ac.uk/collection/P02/current/CNDC/ (external link)
attribute cond_2 units String Siemens/meter [S/m]
variable trans   float  
attribute trans _FillValue float NaN
attribute trans actual_range float -9.99E-29, 100.4446
attribute trans bcodmo_name String transmission
attribute trans description String Beam transmission expressed as percent. Originally named 'CStarTr0'.
attribute trans long_name String Trans
attribute trans units String unitless
variable fluor   float  
attribute fluor _FillValue float NaN
attribute fluor actual_range float -0.0662, 3.2573
attribute fluor bcodmo_name String fluorescence
attribute fluor description String Fluorescence measured by WET Labs ECO-AFL/FL in milligrams per cubic meter. Originally named 'flECO-AFL'.
attribute fluor long_name String Fluor
attribute fluor nerc_identifier String https://vocab.nerc.ac.uk/collection/P01/current/CPHLPM01/ (external link)
attribute fluor units String milligrams/cubic meter [mg/m^3]
variable turbidity   float  
attribute turbidity _FillValue float NaN
attribute turbidity actual_range float -0.1533, -9.99E-29
attribute turbidity bcodmo_name String turbidity
attribute turbidity description String Turbidity measured by WET Labs ECO. Originally named 'turbWetntu0'.
attribute turbidity long_name String Turbidity
attribute turbidity units String NTU
variable O2_v   float  
attribute O2_v _FillValue float NaN
attribute O2_v actual_range float -9.99E-29, 2.7291
attribute O2_v bcodmo_name String O2_v
attribute O2_v description String Raw voltage from SBE43 oxygen sensor. Originally named 'Sbeox0V'.
attribute O2_v long_name String O2 V
attribute O2_v units String volts
variable altitude_   float  
attribute altitude_ _FillValue float NaN
attribute altitude_ actual_range float -7.4, 148.34
attribute altitude_ bcodmo_name String altitude
attribute altitude_ description String Altimeter reading. Originally named 'altM'.
attribute altitude_ long_name String Altitude
attribute altitude_ units String meters
variable bottles_fired   float  
attribute bottles_fired _FillValue float NaN
attribute bottles_fired actual_range float -9.99E-29, 24.0
attribute bottles_fired bcodmo_name String bottle
attribute bottles_fired description String Number of bottle fired. Originally named 'nbf'.
attribute bottles_fired long_name String Bottles Fired
attribute bottles_fired units String unitless
variable SPAR   float  
attribute SPAR _FillValue float NaN
attribute SPAR actual_range float -9.99E-29, 7.15
attribute SPAR bcodmo_name String SPAR
attribute SPAR description String SPAR/Surface Irradiance. Originally named 'spar'.
attribute SPAR long_name String SPAR
attribute SPAR units String microEinsteins/meter^2/second
variable temp_diff   float  
attribute temp_diff _FillValue float NaN
attribute temp_diff actual_range float -9.1227, 0.4047
attribute temp_diff bcodmo_name String temp_diff
attribute temp_diff colorBarMaximum double 10.0
attribute temp_diff colorBarMinimum double -10.0
attribute temp_diff description String Temperature Difference. Originally named 'T2-T190C'.
attribute temp_diff long_name String Temp Diff
attribute temp_diff units String degrees Celsius
variable depth   double  
attribute depth _CoordinateAxisType String Height
attribute depth _CoordinateZisPositive String down
attribute depth _FillValue double NaN
attribute depth actual_range double 1.0, 3238.0
attribute depth axis String Z
attribute depth bcodmo_name String depth
attribute depth colorBarMaximum double 8000.0
attribute depth colorBarMinimum double -8000.0
attribute depth colorBarPalette String TopographyDepth
attribute depth description String Depth. Originally named 'depSM'.
attribute depth ioos_category String Location
attribute depth long_name String Depth
attribute depth nerc_identifier String https://vocab.nerc.ac.uk/collection/P09/current/DEPH/ (external link)
attribute depth positive String down
attribute depth standard_name String depth
attribute depth units String m
variable density   double  
attribute density _FillValue double NaN
attribute density actual_range double -9.99E-29, 1042.6558
attribute density bcodmo_name String density
attribute density description String Primary measure of density in kilograms per cubic meter. Originally named 'density00'.
attribute density long_name String Density
attribute density units String kilograms/cubic meter [kg/m^3]
variable density_2   double  
attribute density_2 _FillValue double NaN
attribute density_2 actual_range double -9.99E-29, 1052.7065
attribute density_2 bcodmo_name String density
attribute density_2 description String Secondary measure of density in kilograms per cubic meter. Originally named 'density11'.
attribute density_2 long_name String Density 2
attribute density_2 units String kilograms/cubic meter [kg/m^3]
variable sal   float  
attribute sal _FillValue float NaN
attribute sal actual_range float -9.99E-29, 52.6288
attribute sal bcodmo_name String sal
attribute sal description String Primary salinity measurement. Originally named 'sal00'.
attribute sal long_name String Sal
attribute sal nerc_identifier String https://vocab.nerc.ac.uk/collection/P01/current/PSALST01/ (external link)
attribute sal units String practical salinity units [PSU]
variable sal_2   float  
attribute sal_2 _FillValue float NaN
attribute sal_2 actual_range float -9.99E-29, 65.6863
attribute sal_2 bcodmo_name String sal
attribute sal_2 description String Secondary salinity measurement. Originally named 'sal11'.
attribute sal_2 long_name String Sal 2
attribute sal_2 nerc_identifier String https://vocab.nerc.ac.uk/collection/P01/current/PSALST01/ (external link)
attribute sal_2 units String practical salinity units [PSU]
variable sound_vel   float  
attribute sound_vel _FillValue float NaN
attribute sound_vel actual_range float -9.99E-29, 1544.73
attribute sound_vel bcodmo_name String sound_vel
attribute sound_vel description String Sound velocity in meters per second. Originally named 'svCM'.
attribute sound_vel long_name String Sound Vel
attribute sound_vel units String meters/second [m/s]
variable sound_vel_2   float  
attribute sound_vel_2 _FillValue float NaN
attribute sound_vel_2 actual_range float -9.99E-29, 1544.7
attribute sound_vel_2 bcodmo_name String sound_vel
attribute sound_vel_2 description String Sound velocity in meters per second from secondary sensor. Originally named 'svCM1'.
attribute sound_vel_2 long_name String Sound Vel 2
attribute sound_vel_2 units String meters/second [m/s]
variable O2   float  
attribute O2 _FillValue float NaN
attribute O2 actual_range float -16.496, 209.498
attribute O2 bcodmo_name String O2_umol_L
attribute O2 description String Oxygen concentration from SBE 43. Originally named 'sbeox0Mm/L'.
attribute O2 long_name String O2
attribute O2 units String micromol/liter [umol/l]
variable descent_rate   float  
attribute descent_rate _FillValue float NaN
attribute descent_rate actual_range float -2.0, 1.731
attribute descent_rate bcodmo_name String descent_rate
attribute descent_rate description String Descent Rate. Originally named 'dz/dtM'.
attribute descent_rate long_name String Descent Rate
attribute descent_rate units String meters/second [m/s]
variable flag   float  
attribute flag _FillValue float NaN
attribute flag actual_range float -9.99E-29, 0.0
attribute flag bcodmo_name String q_flag
attribute flag colorBarMaximum double 150.0
attribute flag colorBarMinimum double 0.0
attribute flag description String Quality flag; bad flag = -9.99e-29.
attribute flag long_name String Flag
attribute flag units String unitless

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