gov.noaa.nodc:0241383 eng utf8 dataset NOAA National Centers for Environmental Information ncei.info@noaa.gov https://www.ncei.noaa.gov/contact HTTPS NOAA Contact Information Information for contacts at NCEI. information custodian 2025-05-16T15:47:53Z ISO 19115-2 Geographic Information - Metadata - Part 2: Extensions for Imagery and Gridded Data ISO 19115-2:2009(E) Fluorescence spectroscopy measurements of dissolved organic carbon in the Broadkill River estuary from 2020-01-22 to 2020-09-09 (NCEI Accession 0241383) 2021-09-23 publication 2021-09-22 creation NOAA National Centers for Environmental Information gov.noaa.nodc:0241383 NCEI Archive Management System 0241383 NOAA National Centers for Environmental Information ncei.info@noaa.gov https://www.ncei.noaa.gov/contact HTTPS NCEI Contact Information Information for contacts at NCEI. information publisher Alina Ebling University of Delaware, College of Earth, Ocean, and Environment, School of Marine Science and Policy aebling@udel.edu http://www.ceoe.udel.edu/schools-departments/school-of-marine-science-and-policy HTTP University of Delaware, College of Earth, Ocean, and Environment, School of Marine Science and Policy website Institution web page information resourceProvider University of Delaware, College of Earth, Ocean, and Environment, School of Marine Science and Policy http://www.ceoe.udel.edu/schools-departments/school-of-marine-science-and-policy HTTP University of Delaware, College of Earth, Ocean, and Environment, School of Marine Science and Policy website Institution web page information resourceProvider Andrew Wozniak University of Delaware, College of Earth, Ocean, and Environment, School of Marine Science and Policy awozniak@udel.edu http://www.ceoe.udel.edu/schools-departments/school-of-marine-science-and-policy HTTP University of Delaware, College of Earth, Ocean, and Environment, School of Marine Science and Policy website Institution web page information principalInvestigator Alina Ebling University of Delaware, College of Earth, Ocean, and Environment, School of Marine Science and Policy aebling@udel.edu http://www.ceoe.udel.edu/schools-departments/school-of-marine-science-and-policy HTTP University of Delaware, College of Earth, Ocean, and Environment, School of Marine Science and Policy website Institution web page information pointOfContact Ebling, Alina University of Delaware; College of Earth, Ocean, and Environment; School of Marine Science and Policy aebling@udel.edu http://www.ceoe.udel.edu/schools-departments/school-of-marine-science-and-policy HTTP University of Delaware, College of Earth, Ocean, and Environment, School of Marine Science and Policy website Institution web page information author Wozniak, Andrew University of Delaware; College of Earth, Ocean, and Environment; School of Marine Science and Policy awozniak@udel.edu http://www.ceoe.udel.edu/schools-departments/school-of-marine-science-and-policy HTTP University of Delaware, College of Earth, Ocean, and Environment, School of Marine Science and Policy website Institution web page information author University of Delaware, College of Earth, Ocean, and Environment, School of Marine Science and Policy http://www.ceoe.udel.edu/schools-departments/school-of-marine-science-and-policy HTTP University of Delaware, College of Earth, Ocean, and Environment, School of Marine Science and Policy website Institution web page information contributor tableDigital The data presented in this submission was for the Delaware Sea Grant project R/HCE-37 titled "Fingerprinting the sources or organic matter using fluorescence spectroscopy: a feasibility study in the Broadkill River estuary." There were three types of samples included, the first was insitu samples from the Broadkill River watershed, located in southern Delaware, USA. Samples were collected at three different times of the year to represent seasonality. The second type of sample was source samples that represented the different land uses found within the watershed. The third type was the source mix samples, which mixed the varying sources to try to mimic the natural environment. Dissolved organic carbon (DOC) concentrations were measured on each sample as well as ultra-violet/visible and fluorescence spectroscopy in the form of the specific ultra-violet absorbance at the wavelength 254 nm (SUVA254) and excitation-emission matrices (EEMs). Organic matter is the source of energy used by bacteria in waterways. The bacteria can draw down oxygen levels to levels too low to sustain life in certain portions of waterways, including parts of the Broadkill River being studied in this project. When low oxygen or related water quality events occur, understanding the source of the organic matter causing the problem is desirable so solutions can be sought. Such a tool would ideally be useful in any waterway and is thus relevant at all geographic scales. The lead PI and his team conducted a study to evaluate whether fluorescence spectroscopy (excitation emission matrix spectroscopy) can reliably provide fingerprints for organic matter sources within waterways and from watershed sources. The target audience for this work was coastal managers interested in deploying such a tool for understanding the major sources of organic matter to waterways. The results of the research were to isolate the portion of the excitation emission matrix spectra that are useful for tracking organic matter sources and to identify the major obstacles of using fluorescence spectroscopy for tracking organic matter sources. Source signals can be lost when the transit time is longer than a few days due to microbial and photodegradative processes. This is the case for the most upstream portions of the Broadkill River which can take on the order of a week to be exported to Delaware Bay depending on river discharge. When two source waters are added, the corresponding fluorescent dissolved organic matter spectrum is not additive in all areas of the spectrum. Importantly though, portions of the spectra do respond additively. This finding suggests that managers focus on a certain range of excitation and emission wavelengths for the purpose of tracking organic matter source. The knowledge gained from this can be used with future research to develop a strategy for monitoring fluorescent dissolved organic matter. For instance, managers may be interested in deploying fluorescence sensors for the purposes of tracking organic matter sources. This work allows them to identify the relevant excitation emission wavelengths. completed historicalArchive NOAA National Centers for Environmental Information ncei.info@noaa.gov https://www.ncei.noaa.gov/contact HTTPS NCEI Contact Information Information for contacts at NCEI. information pointOfContact asNeeded https://www.ncei.noaa.gov/access/metadata/landing-page/bin/gfx?id=gov.noaa.nodc:0241383 Preview graphic PNG 0241383 NCEI ACCESSION NUMBER 2021-09-14 publication DISSOLVED ORGANIC CARBON LATITUDE LONGITUDE theme NODC DATA TYPES THESAURUS fluorometer GPS Total Organic Carbon (TOC) analyzer instrument NODC INSTRUMENT TYPES THESAURUS in situ laboratory analyses model output water chemistry theme NODC OBSERVATION TYPES THESAURUS University of Delaware, College of Earth, Ocean, and Environment, School of Marine Science and Policy dataCentre NODC COLLECTING INSTITUTION NAMES THESAURUS University of Delaware, College of Earth, Ocean, and Environment, School of Marine Science and Policy dataCentre NODC SUBMITTING INSTITUTION NAMES THESAURUS North Atlantic Ocean place NODC SEA AREA NAMES THESAURUS oceanography theme WMO_CategoryCode 2012-09-15 publication EARTH SCIENCE > OCEANS > OCEAN CHEMISTRY > ORGANIC CARBON theme Global Change Master Directory (GCMD) Science Keywords 2026 revision 23 Earth Science Data and Information System, Earth Science Projects Division, Goddard Space Flight Center (GSFC), National Aeronautics and Space Administration (NASA) Greenbelt MD https://forum.earthdata.nasa.gov/app.php/tag/GCMD%2BKeywords HTTPS GCMD Keyword Forum Page Global Change Master Directory (GCMD). 2025. GCMD Keywords, Version 21. Greenbelt, MD: Earth Science Data and Information System, Earth Science Projects Division, Goddard Space Flight Center (GSFC), National Aeronautics and Space Administration (NASA). URL (GCMD Keyword Forum Page): https://forum.earthdata.nasa.gov/app.php/tag/GCMD+Keywords information custodian EXCITATION-EMISSION MATRICES PARAFAC Model SPECIFIC ULTRAVIOLET ABSORBANCE 254 theme Provider Keywords FLUOROMETERS > FLUOROMETERS GPS RECEIVERS > GPS RECEIVERS TOC > Total Organic Carbon Analyzer instrument Global Change Master Directory (GCMD) Instrument Keywords 2026 revision 23 Earth Science Data and Information System, Earth Science Projects Division, Goddard Space Flight Center (GSFC), National Aeronautics and Space Administration (NASA) Greenbelt MD https://forum.earthdata.nasa.gov/app.php/tag/GCMD%2BKeywords HTTPS GCMD Keyword Forum Page Global Change Master Directory (GCMD). 2025. GCMD Keywords, Version 21. Greenbelt, MD: Earth Science Data and Information System, Earth Science Projects Division, Goddard Space Flight Center (GSFC), National Aeronautics and Space Administration (NASA). URL (GCMD Keyword Forum Page): https://forum.earthdata.nasa.gov/app.php/tag/GCMD+Keywords information custodian OCEAN > ATLANTIC OCEAN > NORTH ATLANTIC OCEAN place Global Change Master Directory (GCMD) Location Keywords 2026 revision 23 Earth Science Data and Information System, Earth Science Projects Division, Goddard Space Flight Center (GSFC), National Aeronautics and Space Administration (NASA) Greenbelt MD https://forum.earthdata.nasa.gov/app.php/tag/GCMD%2BKeywords HTTPS GCMD Keyword Forum Page Global Change Master Directory (GCMD). 2025. GCMD Keywords, Version 21. Greenbelt, MD: Earth Science Data and Information System, Earth Science Projects Division, Goddard Space Flight Center (GSFC), National Aeronautics and Space Administration (NASA). URL (GCMD Keyword Forum Page): https://forum.earthdata.nasa.gov/app.php/tag/GCMD+Keywords information custodian RHG9T5 Send2NCEI Submission Package ID accessLevel: Public otherRestrictions Cite as: Ebling, Alina; Wozniak, Andrew (2021). Fluorescence spectroscopy measurements of dissolved organic carbon in the Broadkill River estuary from 2020-01-22 to 2020-09-09 (NCEI Accession 0241383). [indicate subset used]. NOAA National Centers for Environmental Information. Dataset. https://www.ncei.noaa.gov/archive/accession/0241383. Accessed [date]. 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. otherRestrictions 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. eng; USA utf8 environment oceans -75.43867 -75.16047 38.718357 38.99683 2020-01-22 2020-09-09 NOAA National Centers for Environmental Information +1-301-713-3277 ncei.info@noaa.gov pointOfContact 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. Contact NCEI for other distribution options and instructions. Text File Excel 12.06 https://www.ncei.noaa.gov/archive/accession/0241383 HTTPS Web browser NCEI Dataset Landing Page Navigate directly to the URL for a descriptive web page with download links. information https://www.ncei.noaa.gov/archive/accession/oas/241383 HTTPS Web browser Descriptive Information Navigate directly to the URL for a descriptive web page with download links. information https://www.ncei.noaa.gov/archive/accession/download/241383 HTTPS Web browser HTTPS Navigate directly to the URL for data access and direct download. download ftp://ftp-oceans.ncei.noaa.gov/nodc/archive/arc0187/0241383/ FTP Any FTP client FTP 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). download dataset NCEI Accession 0241383 v1.1 was published. 2021-09-23T23:18:28Z NCEI Accession 0241383 v1.1 publication https://www.ncei.noaa.gov/archive/accession/0241383/1.1 HTTPS NCEI Accession 0241383 v1.1 published 2021-09-23T23:18:28Z download dataset Parameter or Variable: DISSOLVED ORGANIC CARBON (calculated); Units: ppm; Observation Category: laboratory analysis; Sampling Instrument: Total Organic Carbon (TOC) Analyzer; Sampling and Analyzing Method: For watershed samples and also the wastewater treatment source sample, water samples were collected via water pump and pre-cleaned tubing from each site and placed into acid-cleaned plastic bottles and kept in the dark at 4°C until filtration (less than 24 hours). Samples were filtered in the lab using vacuum filtration (pre-combusted 0.7 micron 47 mm GF/F filters). For the wetland, agriculture, suburban, and forest source samples, soil samples from representative sources within the watershed were collected in plastic bags and stored in the dark until further processing (less than 24 hours). Approximately 25 grams of wet soil was added to 250 mL of ultra high purity water and mixed overnight using a shaker table. The soil leachate was filtered from the soil/water mixture using vacuum filtration (pre-combusted 0.7 micron 47 mm GF/F filters). For the impervious source sample, rainwater was collected from runoff of a blacktop surface during a significant rainstorm. The rainwater was filtered using vacuum filtration (pre-combusted 0.7 micron 47 mm GF/F filters). For the algae bloom source, a mixture of cultured algae representative of local waters was left sit overnight prior to filtration. The mixture was filtered using vacuum filtration (pre-combusted 0.7 micron 47 mm GF/F filters). All filtered samples were transferred into acid-cleaned plastic bottles and stored in the dark at 4°C until analysis (less than 1 week). Source mix samples were mixed from filtered source samples in various ratios to mimic land use and other scenarios within the environment. Source mix samples were collected into acid-cleaned plastic bottles and stored in the dark at 4°C until analysis (less than 1 week). Subsets of all the samples were acidified to pH 2 with 2 Molar hydrochloric acid just before analysis by the TOC analyzer. Concentrations were calculated based on external calibration standards of potassium hydrogen phthalate.; Data Quality Method: Consensus reference material (CRM) check standards from the Uni. of Miami Hansell laboratory were analyzed at the beginning, middle, and end of every analysis run. Every analysis run with CRMs beyond +/- 10% of the consensus value were discarded, and the samples re-analyzed. The limit of detection was determined based on calculating three times the standard deviation of ultra high purity water analyzed throughout the analysis run. Any concentration below this value was discarded (labeled BDL in spreadsheet). Parameter or Variable: LATITUDE (measured); Units: degrees north; Observation Category: in situ; Sampling Instrument: GPS Parameter or Variable: LONGITUDE (measured); Units: degrees west; Observation Category: in situ; Sampling Instrument: GPS Parameter or Variable: SPECIFIC ULTRAVIOLET ABSORBANCE 254 (calculated); Units: L/(mg m); Observation Category: laboratory analysis; Sampling Instrument: fluorometer; Sampling and Analyzing Method: For watershed samples and also the wastewater treatment source sample, water samples were collected via water pump from each site and placed into acid-cleaned plastic bottles and kept in the dark at 4°C until filtration (less than 24 hours). Samples were filtered in the lab using vacuum filtration (pre-combusted 0.7 micron 47 mm GF/F filters). For the wetland, agriculture, suburban, and forest source samples, soil samples from representative sources within the watershed were collected in plastic bags and stored in the dark until further processing (less than 24 hours). Approximately 25 grams of wet soil was added to 250 mL of ultra high purity water and mixed overnight using a shaker table. The soil leachate was filtered from the soil/water mixture using vacuum filtration (pre-combusted 0.7 micron 47 mm GF/F filters). For the impervious source sample, rainwater was collected from runoff of a blacktop surface during a significant rainstorm. The rainwater was filtered using vacuum filtration (pre-combusted 0.7 micron 47 mm GF/F filters). For the algae bloom source, a mixture of cultured algae representative of local waters was left sit overnight prior to filtration. The mixture was filtered using vacuum filtration (pre-combusted 0.7 micron 47 mm GF/F filters). All filtered samples were transferred into pre-combusted glass vials and stored in the dark at 4°C until analysis (less than 48 hours). Source mix samples were mixed from filtered source samples in various ratios to mimic land use and other scenarios within the environment. Source mix samples were collected into pre-combusted glass vials and stored in the dark at 4°C until analysis (less than 48 hours). All samples were brought to room temperature just before analysis by the Horiba Aqualog which measures absorbance spectra and fluorescence excitation-emission matrices simultaneously. SUVA254 was calculated from the absorbance of each sample at wavelength 254 nm (in m-1) divided by its dissolved organic carbon concentration (in ppm).; Data Quality Method: Daily lamp checks are performed as well as the Raman Scattering Area Unit for ultra high purity water is determined at the beginning of every analysis run to ensure proper instrumental operation. Parameter or Variable: EXCITATION-EMISSION MATRICES (calculated); Units: arbitrary intensity units; Observation Category: laboratory analysis; Sampling Instrument: fluorometer; Sampling and Analyzing Method: For watershed samples and also the wastewater treatment source sample, water samples were collected via water pump from each site and placed into acid-cleaned plastic bottles and kept in the dark at 4°C until filtration (less than 24 hours). Samples were filtered in the lab using vacuum filtration (pre-combusted 0.7 micron 47 mm GF/F filters). For the wetland, agriculture, suburban, and forest source samples, soil samples from representative sources within the watershed were collected in plastic bags and stored in the dark until further processing (less than 24 hours). Approximately 25 grams of wet soil was added to 250 mL of ultra high purity water and mixed overnight using a shaker table. The soil leachate was filtered from the soil/water mixture using vacuum filtration (pre-combusted 0.7 micron 47 mm GF/F filters). For the impervious source sample, rainwater was collected from runoff of a blacktop surface during a significant rainstorm. The rainwater was filtered using vacuum filtration (pre-combusted 0.7 micron 47 mm GF/F filters). For the algae bloom source, a mixture of cultured algae representative of local waters was left to sit overnight prior to filtration. The mixture was filtered using vacuum filtration (pre-combusted 0.7 micron 47 mm GF/F filters). Once filtered, all samples were transferred into pre-combusted glass vials and stored in the dark at 4°C until analysis (less than 48 hours). Source mix samples were mixed from filtered source samples in various ratios to mimic land use and other scenarios within the environment. Source mix samples were collected into pre-combusted glass vials and stored in the dark at 4°C until analysis (less than 48 hours). All samples were brought to room temperature just before analysis by the Horiba Aqualog which measures absorbance spectra and fluorescence excitation-emission matrices simultaneously. Each matrix is subject to Interfilter Corrections, Raleigh Masking of the first and second order, and finally normalized to the daily Raman Scattering Area Unit for ultra high purity water.; Data Quality Method: Daily lamp checks are performed as well as the Raman Scattering Area Unit for ultra high purity water is determined at the beginning of every analysis run to ensure proper instrumental operation. Parameter or Variable: PARAFAC Model (calculated); Units: arbitrary intensity units; Observation Category: model output; Sampling Instrument: fluorometer; Sampling and Analyzing Method: The Excitation-Emission Matrices (EEMs) for every sample was loaded into a parallel factor analysis (PARAFAC) in the MATLAB2019a platform. The drEEM modeling tool was used to process the data and generate a 4-component model. asNeeded Metadata are developed, maintained and distributed by NCEI. Updates are performed as needed to maintain currentness. NOAA National Centers for Environmental Information custodian fluorometer fluorometer fluorometer GPS GPS Global Positioning System receiver satellite-based instrument used for geo-location, positioning and navigation Total Organic Carbon (TOC) analyzer Total Organic Carbon (TOC) analyzer measures the total amount of organic carbon contained in water