http://lod.bco-dmo.org/id/dataset/908342
eng; USA
utf8
dataset
Highest level of data collection, from a common set of sensors or instrumentation, usually within the same research project
Biological and Chemical Oceanography Data Management Office (BCO-DMO)
Unavailable
508-289-2009
WHOI MS#36
Woods Hole
MA
02543
USA
info@bco-dmo.org
http://www.bco-dmo.org
Monday - Friday 8:00am - 5:00pm
For questions regarding this resource, please contact BCO-DMO via the email address provided.
pointOfContact
2023-09-14
ISO 19115-2 Geographic Information - Metadata - Part 2: Extensions for Imagery and Gridded Data
ISO 19115-2:2009(E)
1-decibar binned CTD data from 103 stations collected during R/V Roger Revelle cruise RR2004 along the 150W meridian from 30S to 60S
2023-09-22
publication
2023-09-22
revision
Marine Biological Laboratory/Woods Hole Oceanographic Institution Library (MBLWHOI DLA)
2023-09-25
publication
https://doi.org/10.26008/1912/bco-dmo.908342.1
William M. Balch
Bigelow Laboratory for Ocean Sciences
principalInvestigator
Dennis J. McGillicuddy
Woods Hole Oceanographic Institution
principalInvestigator
Hilde Oliver
Woods Hole Oceanographic Institution
principalInvestigator
Biological and Chemical Oceanography Data Management Office (BCO-DMO)
Unavailable
508-289-2009
WHOI MS#36
Woods Hole
MA
02543
USA
info@bco-dmo.org
http://www.bco-dmo.org
Monday - Friday 8:00am - 5:00pm
For questions regarding this resource, please contact BCO-DMO via the email address provided.
publisher
Cite this dataset as: Balch, W. M., McGillicuddy, D. J., Oliver, H. (2023) 1-decibar binned CTD data from 103 stations collected during R/V Roger Revelle cruise RR2004 along the 150W meridian from 30S to 60S. Biological and Chemical Oceanography Data Management Office (BCO-DMO). (Version 1) Version Date 2023-09-22 [if applicable, indicate subset used]. doi:10.26008/1912/bco-dmo.908342.1 [access date]
RR2004 CTD Data Dataset Description: Methods and Sampling: <p>These data were collected during cruise RR2004 on the R/V Roger Revelle using a Sea-Bird SBE911plus CTD. This cruise departed Honolulu, Hawaii on December 26, 2020 and the ship transited south along the great circle route from Honolulu to 30°S x 150°W, returning to Hawaii on February 23, 2021. CTD casts were performed at 103 stations, encompassing Subtropical, Subantarctic, and Polar waters in the Pacific Sector of the Southern Ocean.</p>
<p>Hydrographic profiles were performed along the transect with the CTD (the "full-water cast"), sampling for Freons, dissolved oxygen, DIC, alkalinity, extracted chlorophyll, nutrients, POC, PIC, biogenic silica, coccolithophore counts and FlowCAM analyses. Each CTD full-water cast was alternated with a "trip-on-fly" water cast. The latter casts involved tripping bottles at 24 depths "on the fly" as they passed the following 24 depth targets. These trip-on-fly casts served to provide greater resolution in hydrographic sections across the features.</p>
<p><strong>Evaluation and calibration of CTD conductivity and oxygen sensors</strong></p>
<p><strong>Salinity:</strong><br />
For the first 62 stations of RR2004, there was a consistent salinity offset of 0.016 ± 0.033 between conductivity sensors. There was a 0.013 ± 0.006 difference in salinity estimated from the salinometer and conductivity sensor 1, and a -0.004 ± 0.034 difference for conductivity sensor 2. The large standard deviations in the offset for conductivity sensor 2 were due to casts 32 and 33, where the pump for CTD 2 became disconnected. Removing these stations reduces the salinometer/conductivity sensor 2 offset to -0.0005 ± 0.006. Given the high agreement of conductivity sensor 2 with the salinometer, conductivity sensor 1 was replaced for stations 63 through the end of the cruise. After switching out the sensor, the difference between salinities between conductivity sensor 1 and 2 was reduced to 0.004 ± 0.002 (see Figure S1 Supplemental File), with a difference between the salinometer and CTD 1 0.0001 ± 0.0233 and a difference between the salinometer and CTD 2 of -0.0039 ± 0.0233. The difference between CTD 1 and the salinometer and CTD 2 and the salinometer was statistically significant (Student's t-test, t = -49.9, 95% confidence interval: -0.0041 – -0.0038, p &lt; 0.001, 452 degrees of freedom), and so the salinometer measurements are significantly better represented by salinities measured by CTD 1 than CTD 2 for stations 63 onwards.</p>
<p>To summarize, users of salinities from RR2004 conductivity sensors should consider:<br />
1) applying a correction factor of ~0.01 to conductivity sensor 1 salinities, at least for stations 32 and 33 where conductivity sensor 2 was not operational;<br />
2) using salinities from conductivity sensor 2 for stations 1-62, except stations 32 and 33; and<br />
3) using salinities from conductivity sensor 1 for stations 63 onward.</p>
<p><strong>Oxygen:</strong><br />
Systematically low measurements recorded by CTD oxygen sensor during casts 1 and 2 led to its replacement for the remainder of the cruise. For stations 3 and onward, there was good agreement between the O2 sensor and the oxygen measurements made in the Hydrolab (see Figure S2 Supplemental File), with<br />
<br />
2 = 1.0079[CTD O2] + 0.0643<br />
<br />
which has R² &gt; 0.99. For stations 1-2, the calibration is<br />
<br />
O2 = 1.5205[CTD O2] + 0.9017<br />
<br />
which has R² = 0.91.</p>
Funding provided by NSF Division of Ocean Sciences (NSF OCE) Award Number: OCE-1735664 Award URL: https://www.nsf.gov/awardsearch/show-award?AWD_ID=1735664
Funding provided by NSF Division of Ocean Sciences (NSF OCE) Award Number: OCE-1735783 Award URL: https://www.nsf.gov/awardsearch/show-award?AWD_ID=1735783
Funding provided by NSF Division of Ocean Sciences (NSF OCE) Award Number: OCE-1735846 Award URL: https://www.nsf.gov/awardsearch/show-award?AWD_ID=1735846
Funding provided by NSF Division of Ocean Sciences (NSF OCE) Award Number: OCE-1736375 Award URL: https://www.nsf.gov/awardsearch/show-award?AWD_ID=1736375
Funding provided by NSF Division of Ocean Sciences (NSF OCE) Award Number: OCE-1735436 Award URL: https://www.nsf.gov/awardsearch/show-award?AWD_ID=1735436
completed
William M. Balch
Bigelow Laboratory for Ocean Sciences
207-315-2567
60 Bigelow Drive
East Boothbay
ME
04544
USA
bbalch@bigelow.org
pointOfContact
Dennis J. McGillicuddy
Woods Hole Oceanographic Institution
508-289-2683
266 Woods Hole Road Bigelow 209B, Mail Stop 11
Woods Hole
MA
02543
USA
dmcgillicuddy@whoi.edu
pointOfContact
Hilde Oliver
Woods Hole Oceanographic Institution
508-289-3458
266 Woods Hole Road Bigelow 208, Mail Stop 11
Woods Hole
MA
02543
USA
holiver@whoi.edu
pointOfContact
asNeeded
Dataset Version: 1
Unknown
Station
cnv_file_name
Ship
Lat_Start
Lon_Start
ISO_DateTime_UTC_Start
prDM
t090C
t190C
c0S_m
c1S_m
sbeox0V
flECO_AFL
flECO_AFL1
CStarTr0
turbWETbb0
par
spar
cpar
v5
sal00
sal11
sigma_e00
sigma_e11
sbeox0ML_L
oxsolML_L
flag
CTD Sea-Bird SBE911plus
theme
None, User defined
station
file_name
Cruise identfier
latitude
longitude
ISO_DateTime_UTC
water pressure
water temperature at measurement depth
conductivity
Oxygen in volts
fluorescence
transmission
turbidity
PAR
SPAR
irradiance
No BCO-DMO term
salinity
sigma-theta
dissolved Oxygen
O2 saturation
flag
featureType
BCO-DMO Standard Parameters
CTD Sea-Bird SBE 911plus
instrument
BCO-DMO Standard Instruments
RR2004
service
Deployment Activity
Pacific Sector of the Southern Ocean along 150W
place
Locations
otherRestrictions
otherRestrictions
Access Constraints: none. Use Constraints: Please follow guidelines at: http://www.bco-dmo.org/terms-use Distribution liability: Under no circumstances shall BCO-DMO be liable for any direct, incidental, special, consequential, indirect, or punitive damages that result from the use of, or the inability to use, the materials in this data submission. If you are dissatisfied with any materials in this data submission your sole and exclusive remedy is to discontinue use.
Collaborative Research: Biogeochemical and Physical Conditioning of Sub-Antarctic Mode Water in the Southern Ocean
https://osprey.bco-dmo.org/project/738118
Collaborative Research: Biogeochemical and Physical Conditioning of Sub-Antarctic Mode Water in the Southern Ocean
<p><em>NSF Award Abstract:</em><br />
Cold surface water in the southern Indian Ocean sinks to about 500 meters and travels in the dark for thousands of miles before it resurfaces some 40 years later near the equator in the other ocean basins. This major water mass is named the Sub-Antarctic Mode Water (SAMW). Nutrients it contains when it warms and rises into the sunlit subtropical and tropical waters are estimated to fuel up to 75% of the microscopic plant growth there. Before it sinks, the chemical properties of the SAMW are modified by the growth and distinct physiology of two common phytoplankton; diatoms with shells made of silica, and coccolithophores with carbonate shells. Local physical dynamics influence where and how fast these two phytoplankton classes grow. Consequently, differing nutrient and trace chemical fingerprints are established at the point of SAMW formation. This project is an exceptionally detailed field and modeling effort that will document and quantify the remarkable, interconnected processes that chemically connect two important oceanic ecosystems half a world apart. The scientists leading the project will study the complexity of the biological and chemical conditioning of the SAMW and thus provide critical data about the large-scale oceanic controls of the biological carbon pump that removes atmospheric carbon dioxide to the deep ocean over millennial timescales. Scientific impact from this project will stem from significant peer-reviewed publications and improved predictive models. Societal benefits will develop from training of a range of scholars, including high school, undergraduate, and graduate students, as well as technical and post-doctoral participants. A high school teacher and science communication specialist will go to sea with the project and share experiences from the ship with students on shore via social media and scheduled web interactions.</p>
<p>To examine how SAMW formation and subduction controls the productivity of global waters well to the north, two January expeditions to the SE Indian Ocean will identify, track, and study the unique mesoscale eddies that serve as discrete water parcels supporting rich populations of either coccolithophores or diatoms plus their associated microbial communities. The eddies will be tracked with Lagrangian Argo drifters and observations will be made of exactly how SAMW is chemically conditioned (i.e. Si, N, P, Fe, and carbonate chemistry) over time scales of months. Using data obtained on the feedback between ecological processes and nutrient, trace metal, and carbonate chemistry in these eddies and on related transect cruises, the project will have three main goals: (1) determine the rates at which SAMW coccolithophores and diatoms condition the carbonate chemistry plus nutrient and trace metal concentrations, as well as assess taxonomic and physiological diversity in the study area with traditional methods plus next-generation sequence DNA/RNA profiling, (2) explore growth limitations by iron, silicate and/or nitrate in controlling algal assemblages and genetic diversity, and (3) combine these findings with the Ekman- and eddy-driven subduction of SAMW to examine biogeochemical impact on a basin scale, using both observations and global numerical models. A meridional survey from 30 to 60 degrees south latitude will be used to characterize the larger-scale variability of carbonate chemistry, nutrient distributions, productivity, genetics and biomass of various plankton groups as SAMW is subducted and proceeds northward.</p>
Conditioning_SAMW
largerWorkCitation
project
eng; USA
oceans
Pacific Sector of the Southern Ocean along 150W
-150.004
-137.022
-59.9983
-29.997
2021-01-08
2021-02-09
0
BCO-DMO catalogue of parameters from 1-decibar binned CTD data from 103 stations collected during R/V Roger Revelle cruise RR2004 along the 150W meridian from 30S to 60S
Biological and Chemical Oceanography Data Management Office (BCO-DMO)
Unavailable
508-289-2009
WHOI MS#36
Woods Hole
MA
02543
USA
info@bco-dmo.org
http://www.bco-dmo.org
Monday - Friday 8:00am - 5:00pm
For questions regarding this resource, please contact BCO-DMO via the email address provided.
pointOfContact
http://lod.bco-dmo.org/id/dataset-parameter/908420.rdf
Name: Station
Units: unitless
Description: <p>Station identifer</p>
http://lod.bco-dmo.org/id/dataset-parameter/908421.rdf
Name: cnv_file_name
Units: unitless
Description: <p>Name of the original .cnv file</p>
http://lod.bco-dmo.org/id/dataset-parameter/908422.rdf
Name: Ship
Units: unitless
Description: <p>Name of the cruise</p>
http://lod.bco-dmo.org/id/dataset-parameter/908423.rdf
Name: Lat_Start
Units: decimal degrees
Description: <p>Latitude at start of cast; negative values = South</p>
http://lod.bco-dmo.org/id/dataset-parameter/908424.rdf
Name: Lon_Start
Units: decimal degrees
Description: <p>Longitude at start of cast; negative values = West</p>
http://lod.bco-dmo.org/id/dataset-parameter/908425.rdf
Name: ISO_DateTime_UTC_Start
Units: unitless
Description: <p>Date and time (UTC) at start of cast in ISO 8601 format</p>
http://lod.bco-dmo.org/id/dataset-parameter/908426.rdf
Name: prDM
Units: decibars (db)
Description: <p>Pressure, Digiquartz</p>
http://lod.bco-dmo.org/id/dataset-parameter/908427.rdf
Name: t090C
Units: degrees Celsius
Description: <p>Temperature (ITS-90)</p>
http://lod.bco-dmo.org/id/dataset-parameter/908428.rdf
Name: t190C
Units: degrees Celsius
Description: <p>Temperature, 2 (ITS-90)</p>
http://lod.bco-dmo.org/id/dataset-parameter/908429.rdf
Name: c0S_m
Units: Siemens per meter (S/m)
Description: <p>Conductivity</p>
http://lod.bco-dmo.org/id/dataset-parameter/908430.rdf
Name: c1S_m
Units: Siemens per meter (S/m)
Description: <p>Conductivity, 2</p>
http://lod.bco-dmo.org/id/dataset-parameter/908431.rdf
Name: sbeox0V
Units: volts (V)
Description: <p>Oxygen raw, SBE 43</p>
http://lod.bco-dmo.org/id/dataset-parameter/908432.rdf
Name: flECO_AFL
Units: milligrams per cubic meter (mg/m^3)
Description: <p>Fluorescence, WET Labs ECO-AFL/FL</p>
http://lod.bco-dmo.org/id/dataset-parameter/908433.rdf
Name: flECO_AFL1
Units: milligrams per cubic meter (mg/m^3)
Description: <p>Fluorescence, WET Labs ECO-AFL/FL, 2</p>
http://lod.bco-dmo.org/id/dataset-parameter/908434.rdf
Name: CStarTr0
Units: percent
Description: <p>Beam Transmission, WET Labs C-Star</p>
http://lod.bco-dmo.org/id/dataset-parameter/908435.rdf
Name: turbWETbb0
Units: per meter-stearadian (m^-1/sr)
Description: <p>Turbidity, WET Labs ECO BB</p>
http://lod.bco-dmo.org/id/dataset-parameter/908436.rdf
Name: par
Units: micromoles photons per square meter per second (umol photons/m^2/sec)
Description: <p>PAR/Irradiance, Biospherical/Licor</p>
http://lod.bco-dmo.org/id/dataset-parameter/908437.rdf
Name: spar
Units: micromoles photons per square meter per second (umol photons/m^2/sec)
Description: <p>SPAR, Biospherical/Licor</p>
http://lod.bco-dmo.org/id/dataset-parameter/908438.rdf
Name: cpar
Units: percent
Description: <p>CPAR/Corrected Irradiance</p>
http://lod.bco-dmo.org/id/dataset-parameter/908439.rdf
Name: v5
Units: volts (V)
Description: <p>Voltage for the Wetlabs Turbidity sensor</p>
http://lod.bco-dmo.org/id/dataset-parameter/908440.rdf
Name: sal00
Units: PSU
Description: <p>Salinity, Practical</p>
http://lod.bco-dmo.org/id/dataset-parameter/908441.rdf
Name: sal11
Units: PSU
Description: <p>Salinity, Practical, 2</p>
http://lod.bco-dmo.org/id/dataset-parameter/908442.rdf
Name: sigma_e00
Units: kilograms per cubic meter (kg/m^3)
Description: <p>Density (sigma-theta)</p>
http://lod.bco-dmo.org/id/dataset-parameter/908443.rdf
Name: sigma_e11
Units: kilograms per cubic meter (kg/m^3)
Description: <p>Density, 2 (sigma-theta)</p>
http://lod.bco-dmo.org/id/dataset-parameter/908444.rdf
Name: sbeox0ML_L
Units: milliliters per liter (ml/L)
Description: <p>Oxygen, SBE 43; WS = 2</p>
http://lod.bco-dmo.org/id/dataset-parameter/908445.rdf
Name: oxsolML_L
Units: milliliters per liter (ml/L)
Description: <p>Oxygen Saturation, Garcia & Gordon</p>
http://lod.bco-dmo.org/id/dataset-parameter/908446.rdf
Name: flag
Units: unitless
Description: <p>Flag</p>
GB/NERC/BODC > British Oceanographic Data Centre, Natural Environment Research Council, United Kingdom
Biological and Chemical Oceanography Data Management Office (BCO-DMO)
Unavailable
508-289-2009
WHOI MS#36
Woods Hole
MA
02543
USA
info@bco-dmo.org
http://www.bco-dmo.org
Monday - Friday 8:00am - 5:00pm
For questions regarding this resource, please contact BCO-DMO via the email address provided.
pointOfContact
24249954
https://darchive.mblwhoilibrary.org/server/api/core/bitstreams/a436b6cf-9db7-43d9-afca-43f5a57e092b/content
download
https://doi.org/10.26008/1912/bco-dmo.908342.1
download
onLine
dataset
<p>These data were collected during cruise RR2004 on the R/V Roger Revelle using a Sea-Bird SBE911plus CTD. This cruise departed Honolulu, Hawaii on December 26, 2020 and the ship transited south along the great circle route from Honolulu to 30°S x 150°W, returning to Hawaii on February 23, 2021. CTD casts were performed at 103 stations, encompassing Subtropical, Subantarctic, and Polar waters in the Pacific Sector of the Southern Ocean.</p>
<p>Hydrographic profiles were performed along the transect with the CTD (the "full-water cast"), sampling for Freons, dissolved oxygen, DIC, alkalinity, extracted chlorophyll, nutrients, POC, PIC, biogenic silica, coccolithophore counts and FlowCAM analyses. Each CTD full-water cast was alternated with a "trip-on-fly" water cast. The latter casts involved tripping bottles at 24 depths "on the fly" as they passed the following 24 depth targets. These trip-on-fly casts served to provide greater resolution in hydrographic sections across the features.</p>
<p><strong>Evaluation and calibration of CTD conductivity and oxygen sensors</strong></p>
<p><strong>Salinity:</strong><br />
For the first 62 stations of RR2004, there was a consistent salinity offset of 0.016 ± 0.033 between conductivity sensors. There was a 0.013 ± 0.006 difference in salinity estimated from the salinometer and conductivity sensor 1, and a -0.004 ± 0.034 difference for conductivity sensor 2. The large standard deviations in the offset for conductivity sensor 2 were due to casts 32 and 33, where the pump for CTD 2 became disconnected. Removing these stations reduces the salinometer/conductivity sensor 2 offset to -0.0005 ± 0.006. Given the high agreement of conductivity sensor 2 with the salinometer, conductivity sensor 1 was replaced for stations 63 through the end of the cruise. After switching out the sensor, the difference between salinities between conductivity sensor 1 and 2 was reduced to 0.004 ± 0.002 (see Figure S1 Supplemental File), with a difference between the salinometer and CTD 1 0.0001 ± 0.0233 and a difference between the salinometer and CTD 2 of -0.0039 ± 0.0233. The difference between CTD 1 and the salinometer and CTD 2 and the salinometer was statistically significant (Student's t-test, t = -49.9, 95% confidence interval: -0.0041 – -0.0038, p &lt; 0.001, 452 degrees of freedom), and so the salinometer measurements are significantly better represented by salinities measured by CTD 1 than CTD 2 for stations 63 onwards.</p>
<p>To summarize, users of salinities from RR2004 conductivity sensors should consider:<br />
1) applying a correction factor of ~0.01 to conductivity sensor 1 salinities, at least for stations 32 and 33 where conductivity sensor 2 was not operational;<br />
2) using salinities from conductivity sensor 2 for stations 1-62, except stations 32 and 33; and<br />
3) using salinities from conductivity sensor 1 for stations 63 onward.</p>
<p><strong>Oxygen:</strong><br />
Systematically low measurements recorded by CTD oxygen sensor during casts 1 and 2 led to its replacement for the remainder of the cruise. For stations 3 and onward, there was good agreement between the O2 sensor and the oxygen measurements made in the Hydrolab (see Figure S2 Supplemental File), with<br />
<br />
2 = 1.0079[CTD O2] + 0.0643<br />
<br />
which has R² &gt; 0.99. For stations 1-2, the calibration is<br />
<br />
O2 = 1.5205[CTD O2] + 0.9017<br />
<br />
which has R² = 0.91.</p>
Specified by the Principal Investigator(s)
<p>Data were processed using Seasave V 7.26.7.121. Processing included binning into 1-decibar bins. For the full processing steps, see the attached Supplemental File containing the complete Seabird header from one cast (station 00101).</p>
Specified by the Principal Investigator(s)
- Imported the original downcast .cnv files (103 total; one per cast) into the BCO-DMO system.
- Marked "-9.990e-29" as the missing data identifier. In the final CSV file, missing values are blank/empty.
- Captured the starting latitude, starting longitude, starting date/time, and station number from the Seabird headers as columns.
- Corrected station numbers in files d03701, d07801, and d09401.
- Concatenated the separate files into one dataset.
- Converted starting latitude and longitude to decimal degrees and rounded values to 5 decimal places.
- Converted starting date/time to ISO8601 format.
- Renamed fields to comply with BCO-DMO parameter naming conventions.
- Saved the final file as "908342_v1_RR2004_CTD.csv".
Specified by BCO-DMO Data Managers
asNeeded
7.x-1.1
Biological and Chemical Oceanography Data Management Office (BCO-DMO)
Unavailable
508-289-2009
WHOI MS#36
Woods Hole
MA
02543
USA
info@bco-dmo.org
http://www.bco-dmo.org
Monday - Friday 8:00am - 5:00pm
For questions regarding this resource, please contact BCO-DMO via the email address provided.
pointOfContact
CTD Sea-Bird SBE911plus
CTD Sea-Bird SBE911plus
PI Supplied Instrument Name: CTD Sea-Bird SBE911plus Instrument Name: CTD Sea-Bird SBE 911plus Instrument Short Name:CTD SBE 911plus Instrument Description: The Sea-Bird SBE 911 plus is a type of CTD instrument package for continuous measurement of conductivity, temperature and pressure. The SBE 911 plus 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 9 plus and SBE 11 plus is called a SBE 911 plus. The SBE 9 plus uses Sea-Bird's standard modular temperature and conductivity sensors (SBE 3 plus and SBE 4). The SBE 9 plus 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 Community Standard Description: http://vocab.nerc.ac.uk/collection/L22/current/TOOL0058/
Cruise: RR2004
RR2004
R/V Roger Revelle
Community Standard Description
International Council for the Exploration of the Sea
R/V Roger Revelle
vessel
RR2004
William M. Balch
R/V Roger Revelle
Community Standard Description
International Council for the Exploration of the Sea
R/V Roger Revelle
vessel