Dataset Overview | National Centers for Environmental Information (NCEI)

Absorption coefficients of colored dissolved organic matter (CDOM) along US GEOTRACES North Atlantic Transect from the R/V Knorr KN199-04 cruise in the subtropical N. Atlantic in 2010 (U.S. GEOTRACES NAT project) (NCEI Accession 0278456)

Preview graphic

This dataset contains optical and physical data collected on R/V Knorr during cruise KN199-04 in the North Atlantic Ocean from 2010-10-16 to 2010-11-02. These data include depth and wavelength. The instruments used to collect these data include Pump surface and Spectrophotometer with Liquid Core Waveguide- WPI. These data were collected by Charles McClain and Joaquin Chaves of National Aeronautics and Space Administration as part of the "U.S. GEOTRACES North Atlantic Transect (U.S. GEOTRACES NAT)" project and "U.S. GEOTRACES (U.S. GEOTRACES)" program. The Biological and Chemical Oceanography Data Management Office (BCO-DMO) submitted these data to NCEI on 2020-03-27.

The following is the text of the dataset description provided by BCO-DMO:

Absorption coefficients of Colored Dissolved Organic matter (CDOM)

Dataset Description:
Optical absorption coefficient of chromophoric dissolved organic matter (aCDOM) on samples collected during Geotraces 2010 (kn199-04).

Note : These data are considered preliminary. As per PI: "CDOM data will be, unfortunately, sent as "preliminary" since our efforts to develop a satisfactory salinity correction did not yield convincing results. We will have to reanalyze the data from the stored samples. The relative magnitudes of the samples are probably OK, which is probably good, if anybody wants to use the data as a conservative tracer, but absolute magnitudes are suspect. Lots of negative values might be a good hint."

The following metadata was extracted from the original file header:

/begin_header
/investigators=Charles_McClain Joaquin_Chaves
/affiliations=NASA
/contact=joaquin.chaves@nasa.gov
/experiment=GEOTRACES
/cruise=kn199-4
/station=NA
/data_file_name=kn199-4_CDOM_reportBCDMO.csv
/documents=CDOM_protocols.pdf
/calibration_files=NA
/data_type=bottle
/data_status=preliminary
/start_date=20101016
/end_date=20101103
/start_time=15:10:00[GMT]
/end_time=00:19:00[GMT]
/north_latitude=38.3307[DEG]
/south_latitude=17.3497[DEG]
/east_longitude=-9.66[DEG]
/west_longitude=-24.4998[DEG]
/water_depth=-999
/measurement_depth=-999
/secchi_depth=-999
/wind_speed=-999
/cloud_percent=-999
/wave_height=-999
!
!The field "replicates" indicates how many replicate samples were
!averaged to produce the reported value
!
/missing=-999
/delimiter=comma

Dataset Citation

Cite as: McClain, Charles; Chaves, Joaquin (2023). Absorption coefficients of colored dissolved organic matter (CDOM) along US GEOTRACES North Atlantic Transect from the R/V Knorr KN199-04 cruise in the subtropical N. Atlantic in 2010 (U.S. GEOTRACES NAT project) (NCEI Accession 0278456). [indicate subset used]. NOAA National Centers for Environmental Information. Dataset. https://www.ncei.noaa.gov/archive/accession/0278456. Accessed [date].

Dataset Identifiers

ISO 19115-2 Metadata

gov.noaa.nodc:0278456

Full Text · XML

Download Data	HTTPS (download) Navigate directly to the URL for data access and direct download. FTP (download) These data are available through the File Transfer Protocol (FTP). FTP is no longer supported by most internet browsers. You may copy and paste the FTP link to the data into an FTP client (e.g., FileZilla or WinSCP).
Distribution Formats	TSV
Ordering Instructions	Contact NCEI for other distribution options and instructions.
Distributor	NOAA National Centers for Environmental Information +1-301-713-3277 NCEI.Info@noaa.gov
Dataset Point of Contact	NOAA National Centers for Environmental Information ncei.info@noaa.gov

Time Period	2010-10-16 to 2010-11-02
Spatial Bounding Box Coordinates	West: -24.5 East: -9.66 South: 17.35 North: 38.331
Spatial Coverage Map

General Documentation

NCEI Dataset Landing Page
Navigate directly to the URL for a descriptive web page with download links.
Descriptive Information
Navigate directly to the URL for a descriptive web page with download links.

Associated Resources

Biological, chemical, physical, biogeochemical, ecological, environmental and other data collected from around the world during historical and contemporary periods of biological and chemical oceanographic exploration and research managed and submitted by the Biological and Chemical Oceanography Data Management Office (BCO-DMO)
- NCEI Collection
  Navigate directly to the URL for data access and direct download.
McClain, C., Chaves, J. (2013) Absorption coefficients of colored dissolved organic matter (CDOM) along US GEOTRACES North Atlantic Transect from the R/V Knorr KN199-04 cruise in the subtropical N. Atlantic in 2010 (U.S. GEOTRACES NAT project). Biological and Chemical Oceanography Data Management Office (BCO-DMO). Dataset version 2013-01-31. https://doi.org/10.26008/1912/bco-dmo.3869.1
- https://doi.org/10.26008/1912/bco-dmo.3869.1 (download)
  originator dataset

gov.noaa.nodc:BCO-DMO

Publication Dates	publication: 2023-05-19
Data Presentation Form	Digital table - digital representation of facts or figures systematically displayed, especially in columns
Dataset Progress Status	Complete - production of the data has been completed Historical archive - data has been stored in an offline storage facility
Data Update Frequency	As needed
Supplemental Information	Acquisition Description: Methods for the Collection and Measurement of the Spectral Absorption Coefficient (a g λ) of Chromophoric Dissolved Organic Matter (CDOM): Seawater samples for the measurement of chromophoric dissolved organic matter (CDOM) absorption (a g ) are filtered under a gentle vacuum (<5 in Hg) through precombusted (6 hours at 450°C) Whatman GF/F glass fiber filters and collected directly into pre-cleaned and pre-combusted sample glass bottles. Samples for determination of CDOM spectral absorption coefficients are stored under refrigeration at 4°C. In the laboratory, CDOM samples are warmed to room temperature and filtered through 0.2 μm Whatman Nuclepore polycarbonate filters or Gelman Supor (polyethersulfone) filters prior to analysis (Mitchell et al. 2000). Filtration samples through GF/F filters is necessary for coastal ocean waters due to the high particle load that quickly clog Nuclepore and Supor filters. Absorption spectra of CDOM are measured using a multiple pathlength, liquid core waveguide (MPLCW) system (World Precision Instruments, Inc., Sarasota, FL) with UV oxidized Milli-Q water as a reference (Miller et al., 2002). CDOM absorbance spectra are measured between 370 and 725 nm at 1 nm intervals normalized to the reference spectrum.
Purpose	This dataset is available to the public for a wide variety of uses including scientific research and analysis.
Use Limitations	accessLevel: Public Distribution liability: NOAA and NCEI make no warranty, expressed or implied, regarding these data, nor does the fact of distribution constitute such a warranty. NOAA and NCEI cannot assume liability for any damages caused by any errors or omissions in these data. If appropriate, NCEI can only certify that the data it distributes are an authentic copy of the records that were accepted for inclusion in the NCEI archives.

Dataset Citation	Cite as: McClain, Charles; Chaves, Joaquin (2023). Absorption coefficients of colored dissolved organic matter (CDOM) along US GEOTRACES North Atlantic Transect from the R/V Knorr KN199-04 cruise in the subtropical N. Atlantic in 2010 (U.S. GEOTRACES NAT project) (NCEI Accession 0278456). [indicate subset used]. NOAA National Centers for Environmental Information. Dataset. https://www.ncei.noaa.gov/archive/accession/0278456. Accessed [date].
Cited Authors	McClain, Charles National Aeronautics and Space Administration Chaves, Joaquin National Aeronautics and Space Administration
Principal Investigators	Charles McClain US National Aeronautic and Space Administration (NASA) Joaquin Chaves US National Aeronautic and Space Administration (NASA)
Contributors	US National Aeronautic and Space Administration (NASA)
Resource Providers	Biological and Chemical Oceanography Data Management Office (BCO-DMO)
Points of Contact	Biological and Chemical Oceanography Data Management Office (BCO-DMO)
Publishers	NOAA National Centers for Environmental Information
Acknowledgments	Funding provided by National Aeronautics & Space Administration (NASA) Award Number: NNX09AN94G

Theme keywords	NODC DATA TYPES THESAURUS DEPTH - OBSERVATION WAVELENGTH NODC OBSERVATION TYPES THESAURUS optical physical WMO_CategoryCode oceanography BCO-DMO Standard Parameters ISO_DateTime_UTC absorption coefficient bottle cast cruise id date_gmt depth event latitude longitude replicate sample identification station time_gmt wavelength year day Originator Parameter Names BTL_ISO_DateTime_UTC absp_coef bottle_GEOTRC cast_GEOTRC cruise_id date_gmt depth depth_GEOTRC_CTD event_GEOTRC lat lon replicates sample_GEOTRC sample_bottle_GEOTRC station_GEOTRC time_gmt wavelength yrday
Data Center keywords	NODC COLLECTING INSTITUTION NAMES THESAURUS US National Aeronautic and Space Administration NODC SUBMITTING INSTITUTION NAMES THESAURUS Biological and Chemical Oceanography Data Management Office Global Change Master Directory (GCMD) Data Center Keywords BCO-DMO > Biological and Chemical Oceanography Data Management Office
Platform keywords	NODC PLATFORM NAMES THESAURUS R/V Knorr BCO-DMO Platform Names R/V Knorr Global Change Master Directory (GCMD) Platform Keywords Ships ICES/SeaDataNet Ship Codes KNORR (call sign: KCEJ, ICES code: 316N, 1970)
Instrument keywords	BCO-DMO Standard Instruments Pump surface Spectrophotometer with Liquid Core Waveguide- WPI Originator Instrument Names Pump surface spectrophotometer with liquid core waveguide- World Precision Instruments
Place keywords	NODC SEA AREA NAMES THESAURUS North Atlantic Ocean Global Change Master Directory (GCMD) Location Keywords OCEAN > ATLANTIC OCEAN > NORTH ATLANTIC OCEAN Provider Place Names Subtropical northern Atlantic Ocean
Project keywords	NODC PROJECT NAMES THESAURUS GEOTRACES BCO-DMO Standard Programs U.S. GEOTRACES (U.S. GEOTRACES) BCO-DMO Standard Projects U.S. GEOTRACES North Atlantic Transect (U.S. GEOTRACES NAT) Global Change Master Directory (GCMD) Project Keywords IPY-GEOTRACES > International Polar Year GEOTRACES: An international study of the biogeochemical cycles of Trace Elements and Isotopes in the Arctic and Southern Oceans Provider Cruise IDs KN199-04 Provider Funding Award Information Funding provided by National Aeronautics & Space Administration (NASA) Award Number: NNX09AN94G
Keywords	NCEI ACCESSION NUMBER 0278456

Use Constraints	Cite as: McClain, Charles; Chaves, Joaquin (2023). Absorption coefficients of colored dissolved organic matter (CDOM) along US GEOTRACES North Atlantic Transect from the R/V Knorr KN199-04 cruise in the subtropical N. Atlantic in 2010 (U.S. GEOTRACES NAT project) (NCEI Accession 0278456). [indicate subset used]. NOAA National Centers for Environmental Information. Dataset. https://www.ncei.noaa.gov/archive/accession/0278456. Accessed [date].
Data License	This dataset is licensed under a Creative Commons Attribution 4.0 International (CC BY 4.0) License. SPDX License: Creative Commons Attribution 4.0 International (CC-BY-4.0)
Access Constraints	Use liability: NOAA and NCEI cannot provide any warranty as to the accuracy, reliability, or completeness of furnished data. Users assume responsibility to determine the usability of these data. The user is responsible for the results of any application of this data for other than its intended purpose.
Fees	In most cases, electronic downloads of the data are free. However, fees may apply for custom orders, data certifications, copies of analog materials, and data distribution on physical media.

Lineage information for: dataset
Processing Steps	2023-05-19T04:35:40Z - NCEI Accession 0278456 v1.1 was published.
Output Datasets	NCEI Accession 0278456 v1.1 NCEI Accession 0278456 v1.1 (download) published 2023-05-19T04:35:40Z

Acquisition Information (collection)
Platform	R/V Knorr

Last Modified: 2023-07-24T15:37:46Z
For questions about the information on this page, please email: ncei.info@noaa.gov

Absorption coefficients of colored dissolved organic matter (CDOM) along US GEOTRACES North Atlantic Transect from the R/V Knorr KN199-04 cruise in the subtropical N. Atlantic in 2010 (U.S. GEOTRACES NAT project) (NCEI Accession 0278456)

Follow us

Contact us