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    Processed CTD data from BH15-11 from R/V Blue Heron cruise BH15-11 in the western arm of Lake Superior in August 2015
    
  
  
    
    

Processed CTD data from BH15-11 from R/V Blue Heron cruise BH15-11 in the western arm of Lake Superior in August 2015

Website: https://www.bco-dmo.org/dataset/708293
Data Type: Cruise Results
Version: 1
Version Date: 2017-07-20

Project
» EAGER - Introducing Early Career Scientists to Research on the Great Lakes (Early Career Great Lakes research)
» Calibration of a Novel Nutrient Paleoproxy in the Southern Ocean (Novel Nutrient Paleoproxy)
ContributorsAffiliationRole
Horner, Tristan J.Woods Hole Oceanographic Institution (WHOI)Principal Investigator
Rauch, ShannonWoods Hole Oceanographic Institution (WHOI BCO-DMO)BCO-DMO Data Manager

Abstract
Processed CTD data from BH15-11 from R/V Blue Heron cruise BH15-11 in the western arm of Lake Superior in August 2015.


Coverage

Spatial Extent: N:47.332 E:-89.8223 S:46.7502 W:-91.9442
Temporal Extent: 2015-08-26 - 2015-08-28

Dataset Description

Processed CTD data from BH15-11.

Related publications:Horner, T. J., Pryer, H. V., Nielsen, S. G., Crockford, P. W., Gauglitz, J. M., Wing, B. A., & Ricketts, R. D. (2017). Pelagic barite precipitation at micromolar ambient sulfate. Nature Communications, 8(1). doi:10.1038/s41467-017-01229-5 


Acquisition Description

CTD casts were conducted using using a Sea-Bird SBE 9 and SBE 11plus V 5.0. The CTD rosette included: WET Labs WETstar, SBE43 (oxygen), WET Labs CDOM, WET Labs C-Star, and Biospherical/Licor sensors. Data were processed (data conversion, filter, loop edit, bin average, ascii out) using Seasave V 7.23.2. 

Notes:
- These data include both the up and down cast at each station. Because Niskin bottles were fired at certain depths on the upcasts, "nbin" values may be very high at those depths (because the CTD sat at depth for a longer period of time).
- Cast 002.01 was aborted due to a transmissometer issue.

Also see: Cast logs from cruise BH15-11 (PDF).


Processing Description

Example SeaSave processing, from cast 005.01:
# datcnv_date = Aug 28 2015 08:22:28, 7.23.2 [datcnv_vars = 17]
# datcnv_in = C:\Users\Tech\Desktop\Seasave\Raw\CTD_2015\BH15-11\005.01.hex C:\Users\Tech\Desktop\Seasave\Raw\CTD_2015\BH15-11\005.01.XMLCON
# datcnv_skipover = 0
# datcnv_ox_hysteresis_correction = yes
# datcnv_ox_tau_correction = yes
# filter_date = Aug 28 2015 08:23:15, 7.23.2
# filter_in = C:\Users\Tech\Desktop\Seasave\Converted Data\005.01.cnv
# filter_low_pass_tc_A = 0.150
# filter_low_pass_tc_B = 0.150
# filter_low_pass_A_vars = prDM
# filter_low_pass_B_vars =
# loopedit_date = Aug 28 2015 08:26:05, 7.23.2
# loopedit_in = C:\Users\Tech\Desktop\Seasave\Filter\005.01f.cnv
# loopedit_minVelocity = 0.100                                                                                            
# loopedit_surfaceSoak: do not remove                                                                                     
# loopedit_excl_bad_scans = yes
# binavg_date = Aug 28 2015 08:26:48, 7.23.2
# binavg_in = C:\Users\Tech\Desktop\Seasave\Loop Edit\005.01fle.cnv
# binavg_bintype = meters
# binavg_binsize = 1
# binavg_excl_bad_scans = yes
# binavg_skipover = 0
# binavg_surface_bin = no, min = 0.000, max = 0.000, value = 0.000
# file_type = ascii

BCO-DMO Processing Notes:
- Modified parameters names to conform with BCO-DMO naming conventions;
- Created ISO_DateTime field from dates in CTD .hdr files;
- Added column for "station_name".


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Supplemental Files

File
BH15-11_CTD_Cast_sheets.pdf
(Portable Document Format (.pdf), 1.49 MB)
MD5:cd8dfd6fab1ec295514c222f9e9104e7
BH15-11_CTD_Cast_sheets.pdf

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Related Publications

Horner, T. J., Pryer, H. V., Nielsen, S. G., Crockford, P. W., Gauglitz, J. M., Wing, B. A., & Ricketts, R. D. (2017). Pelagic barite precipitation at micromolar ambient sulfate. Nature Communications, 8(1). doi:10.1038/s41467-017-01229-5
Results

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Parameters

ParameterDescriptionUnits
castCast identier. Composed of station + cast (e.g. 002.01 = station 2, cast 1). unitless
lat_startLatitude at start of cast; obtained from .hdr files decimal degrees
lon_startLongitude at start of cast; obtained from .hdr files decimal degrees
ISO_DateTime_UTCTime and date formatted to ISO 8601 standard (yyyy-mm-ddTHH:MM:SS); obtained from .hdr files unitless
PrDMPressure, Digiquartz decibars (db)
DepFMDepth (fresh water) meters (m)
T090CTemperature [ITS-90] degrees Celsius
C0uS_cmConductivity microsiemens per centimeter (uS/cm)
SpeccSpecific conductance microsiemens per centimeter (uS/cm)
WetStarFluorescence measured by WET Labs WETstar milligrams per cubic meter (mg/m3)
Sbeox0Mg_LOxygen measured by SBE43 milligrams per liter (mg/L)
WetCDOMFluorescence measured by WET Labs CDOM milligrams per cubic meter (mg/m3)
CStarTr0Beam transmission measured by WET Labs C-Star percent (%)
ParPAR/Irradiance measured by Biospherical/Licor microEinsteins per square centimeter per second (ueinsteins/cm2-sec)
OrpOxidation reduction potential millivolts (mV)
PhpH unitless (pH scale)
Dz_dtMDescent rate meters per second (m/s)
TimeSElapsed time seconds
AltMAltimeter meter (m)
LatitudeLatitude decimal degrees
LongitudeLongitude decimal degrees
NbinNumber of scans per bin unitless
Flag0.000e+00 (bad flag = -9.990e-29) unitless
station_nameName commonly used to refer to the station unitless


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Instruments

Dataset-specific Instrument Name
Biospherical/Licor
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
SBE 43
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
WET Labs CDOM
Generic Instrument Name
CTD-fluorometer
Generic Instrument Description
A CTD-fluorometer is an instrument package designed to measure hydrographic information (pressure, temperature and conductivity) and chlorophyll fluorescence.

Dataset-specific Instrument Name
Sea-Bird SBE 9 and SBE 11plus V 5.0
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
WET Labs C-Star
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

Dataset-specific Instrument Name
WET Labs WETstar
Generic Instrument Name
WETLabs WETStar fluorometer
Generic Instrument Description
Submersible fluorometer designed for through-flow or pumped CTD applications manufactured by WetLabs and which can be configured for various types of fluorescence. The probe has a temperature range of 0-30 degrees C and a depth rating of 600m.


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Deployments

BH15-11

Website
Platform
R/V Blue Heron
Start Date
2015-08-26
End Date
2015-08-28


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Project Information

EAGER - Introducing Early Career Scientists to Research on the Great Lakes (Early Career Great Lakes research)

Coverage: Great Lakes


NSF Award Abstract:

This proposal to fund a research training cruise on the University of Minnesota's R/V Blue Heron for early career scientists from the Great Lakes basin. The proposed work will have two goals: 1) teach early career lacustrine scientists how to acquire, plan for, and manage cruises aboard UNOLS ships, possibly having some impact on the long-term decrease in requests for ship time on UNOLS ships in general; and 2) expose members of the Great Lakes scientific community, which has an abysmally low submittal rate of proposals to NSF requesting UNOLS ships, to UNOLS and the academic fleet. This project mirrors the successful Chief Scientist training program that Dr. Claire Reimers at Oregon State University has run on ocean-going ships such as the R/V Wecoma, New Horizon and Endeavor.
Intellectual Merit :
The training cruise envisioned herein will allow early career scientists to collect seed data
and test hypotheses for future proposals to NSF.
Broader Impacts :
This proposal intends to educate the next generation of researchers about the capabilities
of UNOLS. This type of outreach between UNOLS and potential users is not only important for
the broader scientific community, but doubly important for the Great Lakes community which
seems resistant to using assets like the UNOLS fleet.


Calibration of a Novel Nutrient Paleoproxy in the Southern Ocean (Novel Nutrient Paleoproxy)

Coverage: Southern Ocean


NSF Award Abstract:

Human observations of Earth's climate span only a narrow window of Earth History. Understanding how and why Earth's climate changed before human observations can be overcome through the measurement and interpretation of the chemical composition of marine sediments. Accurate interpretation of these records -- also known as "proxy" records, because they stand in for direct measurements of environmental conditions in the past -- first requires that the behavior of the proxy be properly calibrated against direct observations in modern environments. This project will develop a novel proxy for marine nutrient utilization based on a comprehensive characterization of the chemical composition of particulate organic matter in the Southern Ocean. The formation and export of organic matter in the ocean requires nutrients, consumes carbon, and can influence the global air-sea balance of carbon dioxide. New proxies and calibrations offer novel ways of looking at Earth's climate history and can potentially illuminate interactions within marine ecosystems.

The efficiency of the biological carbon pump depends critically on the availability and utilization of marine nutrients, particularly in the Southern Ocean. However, ambiguity in, and disagreement between current nutrient utilization paleoproxies renders reconstruction of past nutrient regimes uncertain. Cadmium -- a known proxy for phosphate -- offers a means to circumvent many of the known limitations of existing nutrient proxies, but requires a full isotopic characterization before its application. In this project, researchers will trace the stable isotopic composition of cadmium recorded in organic matter using multiple collector inductively coupled plasma mass spectrometry. The researchers will make isotopic measurements across numerous surface nutrient regimes in the Southern Ocean, with a focus on three critical geochemical transitions: the formation of organic carbon at the sea surface, its transit and decomposition through the ocean's interior, and its behavior during burial on the sea floor. This sea surface-to-sea floor calibration will thus comprehensively determine the utility and fidelity of a novel nutrient proxy, allowing a more accurate view of how Earth's climate was related to ocean biogeochemistry in the past.



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Funding

Funding SourceAward
NSF Division of Ocean Sciences (NSF OCE)
NSF Division of Ocean Sciences (NSF OCE)

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This document is created by info v 4.1f 5 Oct 2018 from the content of the BCO-DMO metadata database.    2022-01-16  04:57:24