gov.noaa.nodc:0250487 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 2026-07-24T13:15:19Z ISO 19115-2 Geographic Information - Metadata - Part 2: Extensions for Imagery and Gridded Data ISO 19115-2:2009(E) Water temperature, salinity, and others taken by CTD and other instruments from the research vessel Araon in the Chukchi, Bering Seas, and north Pacific from 2021-07-20 to 2021-07-24 (NCEI Accession 0250487) 2022-03-31 publication 2023-07-20 revision 2022-03-24 creation International DOI Foundation (IDF) 10.25921/6xf0-8v58 NOAA National Centers for Environmental Information gov.noaa.nodc:0250487 NCEI Archive Management System 0250487 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 Kyoung-Ho Cho Korea Polar Research Institute (KOPRI) kcho@kopri.re.kr http://www.kopri.re.kr/exclude/userIndex/engIndex.do HTTP Korea Polar Research Institute (KOPRI) website Institution web page information resourceProvider Korea Polar Research Institute (KOPRI) http://www.kopri.re.kr/exclude/userIndex/engIndex.do HTTP Korea Polar Research Institute (KOPRI) website Institution web page information resourceProvider Kyoung-Ho Cho Korea Polar Research Institute (KOPRI) kcho@kopri.re.kr pointOfContact Cho, Kyoung-Ho Korea Polar Research Institute http://www.kopri.re.kr/exclude/userIndex/engIndex.do HTTP Korea Polar Research Institute (KOPRI) website Institution web page information author Yang, Eun Jin Korea Polar Research Institute http://www.kopri.re.kr/exclude/userIndex/engIndex.do HTTP Korea Polar Research Institute (KOPRI) website Institution web page information author Jung, Jinyoung author Lee, Youngjoo author Park, Keyhong author Park, Jisoo author Yoon, Young-Jun author Kim, Joo-Hong author Choi, Taejin author Kim, Hyuncheol author Korea Polar Research Institute (KOPRI) http://www.kopri.re.kr/exclude/userIndex/engIndex.do HTTP Korea Polar Research Institute (KOPRI) website Institution web page information contributor tableDigital These datasets were collected during the research vessel Araon cruise 12, 2nd Leg (ARA12B) in summer of 2021 and submitted by Kyoung-Ho Cho from the Korea Polar Research Institute (KOPRI), who was the chief scientist of the ARA12B cruise. There are several categories: physical, chemical, biological, meteorological, and underway. Physical dataset includes CTD and Lowered ADCP measurements. Chemical dataset includes nutrients, DIC, and total alkalinity (TA). Biological dataset includes Chl-a (concentration and size fraction), pigment, zooplankton abundance, microzooplankton abundance, bacterial abundance, and photochemical efficiency of phytoplankton. Meteorological dataset includes air temperature, relative humidity, air pressure, wind, shortwave/longwave radiations, and radiosonde observations. Underway data include pCO2, black carbon concentration, and inherent optical properties. Meteo and underway were collected quasi-continuously during the entire cruise, cover larger area, and have longer time span. This cruise is U.S. State Department MSR U2021-010 as part of the World Data Service for Oceanography. Data are in CSV and text formats. This dataset is available to the public for a wide variety of uses including scientific research and analysis. Funding Agency: Ministry of Oceans and Fisheries, Korea 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 NCEI Accession 0250487 was revised and a new version of the archival package was published. Updates to existing archival packages may provide additional files or replace obsolete files. The latest version contains the most complete and up-to-date representation of this archival information package. All of the files received prior to this update are available in the preceding version of this accession. Please see journal.txt in the /about directory for additional details on changes made. https://www.ncei.noaa.gov/access/metadata/landing-page/bin/gfx?id=gov.noaa.nodc:0250487 Preview graphic PNG 0250487 NCEI ACCESSION NUMBER 2022-03-23 publication AIR TEMPERATURE Attenuation/Transmission BAROMETRIC PRESSURE CHLOROPHYLL A CONCENTRATION CURRENT SPEED - EAST/WEST COMPONENT (U) CURRENT SPEED - NORTH/SOUTH COMPONENT (V) Delta Oxygen-18 DISSOLVED INORGANIC CARBON (DIC) DISSOLVED ORGANIC CARBON Dissolved Organic Nitrogen DISSOLVED OXYGEN FLUORESCENCE NUTRIENTS partial pressure of carbon dioxide - water PHOTOSYNTHETIC ACTIVE RADIATION (PAR) RELATIVE HUMIDITY SALINITY total alkalinity WATER DENSITY WATER TEMPERATURE WIND DIRECTION - AVERAGE WIND SPEED - AVERAGE xCO2 seawater ZOOPLANKTON ABUNDANCE theme NODC DATA TYPES THESAURUS ADCP barometric pressure sensor bubble type equilibrator for autonomous carbon dioxide (CO2) measurement CTD fluorometer humidity sensor meteorological sensor net Niskin bottle PAR Sensor temperature sensor transmissometer instrument NODC INSTRUMENT TYPES THESAURUS biological chemical in situ laboratory analyses meteorological physical profile surface underway theme NODC OBSERVATION TYPES THESAURUS Araon platform NODC PLATFORM NAMES THESAURUS Korea Polar Research Institute dataCentre NODC COLLECTING INSTITUTION NAMES THESAURUS Korea Polar Research Institute dataCentre NODC SUBMITTING INSTITUTION NAMES THESAURUS U. S. Department of State Marine Scientific Research (MSR) project NODC PROJECT NAMES THESAURUS Bering Sea Chukchi Sea Japan Sea North Pacific Ocean place NODC SEA AREA NAMES THESAURUS oceanography theme WMO_CategoryCode 2012-09-15 publication KR/KOPRI > Korea Polar Research Institute, Republic of Korea dataCentre Global Change Master Directory (GCMD) Data Center Keywords 2026 revision 24 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 MSR > U.S. Department of State Marine Scientific Research project Global Change Master Directory (GCMD) Project Keywords 2026 revision 24 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 Korea-Arctic Ocean Warming and Response of Ecosystem project Provider Project Names EARTH SCIENCE > ATMOSPHERE > ATMOSPHERIC PRESSURE EARTH SCIENCE > ATMOSPHERE > ATMOSPHERIC TEMPERATURE EARTH SCIENCE > ATMOSPHERE > ATMOSPHERIC WATER VAPOR > WATER VAPOR INDICATORS > HUMIDITY > RELATIVE HUMIDITY EARTH SCIENCE > ATMOSPHERE > ATMOSPHERIC WINDS > SURFACE WINDS > WIND DIRECTION EARTH SCIENCE > ATMOSPHERE > ATMOSPHERIC WINDS > SURFACE WINDS > WIND SPEED EARTH SCIENCE > BIOSPHERE > ECOSYSTEMS > AQUATIC ECOSYSTEMS > PLANKTON > ZOOPLANKTON EARTH SCIENCE > OCEANS > OCEAN CHEMISTRY > ALKALINITY EARTH SCIENCE > OCEANS > OCEAN CHEMISTRY > CARBON DIOXIDE EARTH SCIENCE > OCEANS > OCEAN CHEMISTRY > CHLOROPHYLL EARTH SCIENCE > OCEANS > OCEAN CHEMISTRY > INORGANIC CARBON EARTH SCIENCE > OCEANS > OCEAN CHEMISTRY > NITROGEN EARTH SCIENCE > OCEANS > OCEAN CHEMISTRY > NUTRIENTS EARTH SCIENCE > OCEANS > OCEAN CHEMISTRY > ORGANIC CARBON EARTH SCIENCE > OCEANS > OCEAN CHEMISTRY > OXYGEN EARTH SCIENCE > OCEANS > OCEAN CIRCULATION > OCEAN CURRENTS EARTH SCIENCE > OCEANS > OCEAN OPTICS > ATTENUATION/TRANSMISSION EARTH SCIENCE > OCEANS > OCEAN OPTICS > FLUORESCENCE EARTH SCIENCE > OCEANS > OCEAN OPTICS > PHOTOSYNTHETICALLY ACTIVE RADIATION EARTH SCIENCE > OCEANS > OCEAN TEMPERATURE > WATER TEMPERATURE EARTH SCIENCE > OCEANS > SALINITY/DENSITY > DENSITY EARTH SCIENCE > OCEANS > SALINITY/DENSITY > SALINITY theme Global Change Master Directory (GCMD) Science Keywords 2026 revision 24 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 Bacterial Abundance Black Carbon concentration Incoming longwave radiation Incoming shortwave radiation Inherent Optical Properties - IOPs Microzooplankton Abundance Outgoing longwave radiation Outgoing shortwave radiation Photochemical efficiency of phytoplankton Pigment concentration Size fraction chlorophyll a radiosonde parameters theme Provider Keywords ADCP > Acoustic Doppler Current Profiler BAROMETERS > BAROMETERS CTD > Conductivity, Temperature, Depth EQUILIBRATORS FLUOROMETERS > FLUOROMETERS HUMIDITY SENSORS > HUMIDITY SENSORS NETS > NETS NISKIN BOTTLES PAR SENSORS > Photosynthetically Active Radiation Sensors TEMPERATURE SENSORS > TEMPERATURE SENSORS TRANSMISSOMETERS instrument Global Change Master Directory (GCMD) Instrument Keywords 2026 revision 24 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 Aethalometer Bongo Net High Pressure Liquid Chromatography (HPLC) Lowered ADCP R.M. Young 05106 Marine Wind Monitor RS41-SPG radiosonde SN-500 Net Radiation Sensor Water sampler dissolved oxygen sensor miniaturized fluorescence induction and relaxation (mini-FIRe) instrument Provider Instruments Ships platform Global Change Master Directory (GCMD) Platform Keywords 2026 revision 24 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 ARAON (call sign: DSQL7, ICES code: 24HU, 2009-) platform ICES/SeaDataNet Ship Codes OCEAN > ARCTIC OCEAN > CHUKCHI SEA OCEAN > PACIFIC OCEAN > NORTH PACIFIC OCEAN OCEAN > PACIFIC OCEAN > NORTH PACIFIC OCEAN > BERING SEA OCEAN > PACIFIC OCEAN > NORTH PACIFIC OCEAN > SEA OF JAPAN place Global Change Master Directory (GCMD) Location Keywords 2026 revision 24 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 3B2N8L Send2NCEI Submission Package ID accessLevel: public otherRestrictions Cite as: Cho, Kyoung-Ho; Yang, Eun Jin; Jung, Jinyoung; Lee, Youngjoo; Park, Keyhong; Park, Jisoo; Yoon, Young-Jun; Kim, Joo-Hong; Choi, Taejin; Kim, Hyuncheol (2022). Water temperature, salinity, and others taken by CTD and other instruments from the research vessel Araon in the Chukchi, Bering Seas, and north Pacific from 2021-07-20 to 2021-07-24 (NCEI Accession 0250487). [indicate subset used]. NOAA National Centers for Environmental Information. Dataset. https://doi.org/10.25921/6xf0-8v58. 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 climatologyMeteorologyAtmosphere 130 -165 36 75 2021-07-20 2021-07-24 This dataset contains multiple versions. The highest version is the most complete. In this accession, NCEI has archived multiple versions of these data. The latest (and best) version of these data has the largest version number. 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. Originator data format 63.428 https://doi.org/10.25921/6xf0-8v58 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/250487 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/250487 HTTPS Web browser HTTPS Navigate directly to the URL for data access and direct download. download ftp://ftp-oceans.ncei.noaa.gov/nodc/archive/arc0198/0250487/ 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 0250487 v1.1 was published. 2022-03-31T17:32:21Z NCEI Accession 0250487 v1.1 publication https://www.ncei.noaa.gov/archive/accession/0250487/1.1 HTTPS NCEI Accession 0250487 v1.1 published 2022-03-31T17:32:21Z download NCEI Accession 0250487 was revised and v2.2 was published. Updates were received for this dataset. These updates were copied into the data/0-data/ directory of this accession. These updates may provide additional files or replace obsolete files. This version contains the most complete and up-to-date representation of this archival information package. All of the files received prior to this update are available in the preceding version of this accession. 2023-07-20T17:08:49Z NCEI Accession 0250487 v2.2 publication https://www.ncei.noaa.gov/archive/accession/0250487/2.2 HTTPS NCEI Accession 0250487 v2.2 published 2023-07-20T17:08:49Z download dataset Parameter or Variable: WATER TEMPERATURE (measured); Units: degrees Celsius; Observation Category: in situ; Sampling Instrument: CTD Parameter or Variable: SALINITY (measured); Units: psu; Observation Category: in situ; Sampling Instrument: CTD Parameter or Variable: CURRENT SPEED - EAST/WEST COMPONENT (U) (measured); Units: m/s; Observation Category: in situ; Sampling Instrument: Lowered ADCP Parameter or Variable: CURRENT METER - NORTH-SOUTH COMPONENT (V) (measured); Units: m/s; Observation Category: in situ; Sampling Instrument: Lowered ADCP Parameter or Variable: WATER DENSITY (measured); Units: kg/m^3; Observation Category: in situ; Sampling Instrument: CTD Parameter or Variable: DISSOLVED OXYGEN (measured); Units: micromole/kilogram; Observation Category: in situ; Sampling Instrument: dissolved oxygen sensor Parameter or Variable: FLUORESCENCE (measured); Units: mg/m^3; Observation Category: in situ; Sampling Instrument: fluorometer Parameter or Variable: PHOTOSYNTHETIC ACTIVE RADIATION (PAR) (measured); Units: microEinsteins/m^2 sec; Observation Category: in situ; Sampling Instrument: PAR Sensor Parameter or Variable: Attenuation/Transmission (measured); Units: 1/m; Observation Category: in situ; Sampling Instrument: transmissometer Parameter or Variable: NUTRIENTS (measured); Units: micromole; Observation Category: in situ; Sampling Instrument: Niskin bottle; Sampling and Analyzing Method: Auto Analyer -PO4, NO2+NO3, NH4, SiO2 Parameter or Variable: DISSOLVED ORGANIC CARBON (measured); Units: micromole C; Observation Category: in situ; Sampling Instrument: Niskin bottle; Sampling and Analyzing Method: TOC analyzer Parameter or Variable: Dissolved Organic Nitrogen (measured); Units: micromole N; Observation Category: in situ; Sampling Instrument: Niskin bottle; Sampling and Analyzing Method: TN analyzer Parameter or Variable: Delta Oxygen-18 (measured); Units: permile; Observation Category: in situ; Sampling Instrument: Niskin bottle; Sampling and Analyzing Method: Isotope ratio mass spectrometer Parameter or Variable: DISSOLVED INORGANIC CARBON (DIC) (measured); Units: micromole/kilogram; Observation Category: in situ; Sampling Instrument: Niskin bottle Parameter or Variable: total alkalinity (measured); Units: micromole/kilogram; Observation Category: in situ; Sampling Instrument: Niskin bottle Parameter or Variable: partial pressure of carbon dioxide - water (measured); Units: ppm; Observation Category: in situ; Sampling Instrument: pCO2 sensor; Sampling and Analyzing Method: NDIR Parameter or Variable: CHLOROPHYLL A CONCENTRATION (measured); Units: microgram/liter; Observation Category: in situ; Sampling Instrument: fluorometer Parameter or Variable: Size fraction chlorophyll a (measured); Units: %; Observation Category: in situ; Sampling Instrument: fluorometer Parameter or Variable: Pigment concentration (measured); Units: nanogram/liter; Observation Category: in situ; Sampling Instrument: HPLC Parameter or Variable: ZOOPLANKTON ABUNDANCE (measured); Units: individuals/m^3; Observation Category: in situ; Sampling Instrument: Bongo Net; Sampling and Analyzing Method: Mesh size: 330 micrometer Parameter or Variable: Bacterial Abundance (measured); Units: cells/mL; Observation Category: in situ; Sampling Instrument: Niskin bottle Parameter or Variable: Microzooplankton Abundance (measured); Units: cells/liter; Observation Category: in situ; Sampling Instrument: Niskin bottle Parameter or Variable: Photochemical efficiency of phytoplankton (measured); Units: N/A; Observation Category: in situ; Sampling Instrument: miniaturized fluorescence induction and relaxation (a mini‐FIRe); Sampling and Analyzing Method: Fv/Fm Parameter or Variable: Black Carbon concentration (measured); Units: nanogram/m^3; Observation Category: in situ; Sampling Instrument: Aethalometer Parameter or Variable: Inherent Optical Properties - IOPs (measured); Units: N/A; Observation Category: in situ; Sampling Instrument: Water sampler and satellite; Sampling and Analyzing Method: - Absorption coefficient of particle (550nm) - Absorption coefficient of de-pigment particle (550nm) - Absorption coefficient of colored dissolved organic matter (550nm) - Concentration of Suspended sediment - Concentration of chlorophyll-a Parameter or Variable: AIR TEMPERATURE (measured); Units: degrees Celsius; Observation Category: in situ; Sampling Instrument: temperature sensor; Sampling and Analyzing Method: HMP155(Vaisala) Parameter or Variable: RELATIVE HUMIDITY (measured); Units: %; Observation Category: in situ; Sampling Instrument: humidity sensor; Sampling and Analyzing Method: HMP155(Vaisala) Parameter or Variable: BAROMETRIC PRESSURE (measured); Units: hPa; Observation Category: in situ; Sampling Instrument: Barometric pressure sensor; Sampling and Analyzing Method: PTB110(Vaisala) Parameter or Variable: WIND SPEED - AVERAGE (measured); Units: m/s; Observation Category: in situ; Sampling Instrument: windmill; Sampling and Analyzing Method: 05106(RM Young) Parameter or Variable: WIND DIRECTION - AVERAGE (measured); Units: degree; Observation Category: in situ; Sampling Instrument: windmill; Sampling and Analyzing Method: 05106(RM Young) Parameter or Variable: Incoming shortwave radiation (measured); Units: Watt/m^2; Observation Category: in situ; Sampling Instrument: SN-500 Parameter or Variable: Outgoing shortwave radiation (measured); Units: Watt/m^2; Observation Category: in situ; Sampling Instrument: SN-500 Parameter or Variable: Incoming longwave radiation (measured); Units: Watt/m^2; Observation Category: in situ; Sampling Instrument: SN-500 Parameter or Variable: Outgoing longwave radiation (measured); Units: Watt/m^2; Observation Category: in situ; Sampling Instrument: SN-500 Parameter or Variable: radiosonde parameters (measured); Units: individual units; Observation Category: in situ; Sampling Instrument: RS41-SPG radiosonde; Sampling and Analyzing Method: Observation variables - Time (UTC) - Height (m) - Air pressure (hPa) - Air temperature (degrees C) - Relative humidity (%) - Dewpoint temperature (degrees C) - Virtual temperature (degrees C) - Equivalent potential temperature (degrees C) - Saturation vapor pressure (hPa) - Vapor pressure (hPa) - Mixing ratio (g/kg) - Wind direction (degree) - Wind speed (m/s) - Zonal component of wind (m/s) - Meridional component of wind (m/s) - Latitude (degree North) - Longitude (degree East) asNeeded Metadata are developed, maintained and distributed by NCEI. Updates are performed as needed to maintain currentness. NOAA National Centers for Environmental Information custodian ADCP ADCP Acoustic Doppler Current Profiler The Acoustic Doppler Current Profiler (ADCP) measures currents beneath a ship while underway. Sound signals sent from the moving ship bounce back to receivers aboard the ship. This provides a profile of water movement relative to the ship-precise modern navigation, allowing the ship's motion to be subtracted from the data. These devices are also used on moorings and profilers and, along with acoustic backscattering, measure animal biomass. Particles in the path of the sound waves, mostly plankton, reflect a small part of the sound energy back toward receivers, allowing researchers to make remote estimates of the sizes and numbers of animals present in the water column. Before the 1970's, the most technologically advanced instrument used to measure water velocity was known as a Doppler speed log. This evolved into the first commercial ADCP, produced in the mid-1970's, which used averaging. Later in the 1970's, the first vessel-mounted ADCP was developed to measure water velocity more accurately and to allow measurement in range cells over a depth profile. As instruments evolved, so did new techniques in Doppler signal processing. Initially, Doppler speed logs used simple analog signal processing methods, which are still used in some commercial speed logs today. However, the first ADCPs incorporated analog-to-digital signal conversion over a narrow communication bandwidth. Around 1990, this technique was developed into broadband signal processing. Since then, broadband ADCPs have been able to generate very accurate, real-time velocity measurements. barometric pressure sensor barometric pressure sensor instrument used to measure the atmospheric pressure. bubble type equilibrator for autonomous carbon dioxide (CO2) measurement bubble type equilibrator for autonomous carbon dioxide (CO2) measurement This type of equilibrators are often used on buoys. Developed by Pacific Marine Environmental Laboratory and Monterey Bay Aquarium Research Institute, the h-shaped bubble equilibrator does not require a water pump to spray water from the top. see Takahashi 1961 for more information. CTD CTD Conductivity-Temperature-Depth probe fluorometer fluorometer fluorometer humidity sensor humidity sensor HUMIDITY SENSORS are devices that receive a signal or stimulus (as heat or pressure or light or motion etc.) and responds to it, in this case humidity or some measure of the water vapor content of air. meteorological sensor meteorological sensor Any meteorological sensor, but also see specific instruments such as aerovane, anemometer, etc. net net net Niskin bottle Niskin bottle Device for obtaining samples of seawater at a specific depth Why special entry for Niskin bottle but no entry for Nansen bottle? PAR Sensor PAR Sensor Photosynthetically Active Radiation Sensor The PAR sensor measures global solar radiation from 400 to 700 nm, which approximates the spectral band active in photosynthesis. The response of the instrument falls sharply to zero on either side of this band, and between 400 and 670 nm it increases monotonically from about 50% to 100%. There is no protective glass dome over the receiving surface. Irradiance from the sun passes through a small white visible bandpass filter/diffuser in the shape of a horizontal disk at the top of the instrument. Within the instrument radiation is directed through a series of colored glass filters and onto a silicon photodiode detector. The factory-supplied calibration converts the signal from the detector to a flux of photons in micro-mole (of photons) s-1 m-2. (One micro-mole equals 6.022 E17 photons.) For the solar spectrum, these units may be converted to watts per square meter by dividing by 4.6. (http://www.srrb.noaa.gov/instrument/par.htm) temperature sensor temperature sensor A sensor used to measure temperature. transmissometer transmissometer transmissometer Instrument used to measure transmissivity in NODC File Alias F022. Araon Platform Class : 31 Research vessel Commissioned Date : 2009 Built : 2009 IMO : 9490935 MMSI: 441619000 Current Length : 109.5 Notes : Icebreaker Information Sources : http://www.go-ship.org/Docs/AraonBrochure.pdf https://en.wikipedia.org/wiki/RV_Araon http://www.shipspotting.com/gallery/photo.php?lid=1767563 https://www.marinetraffic.com/en/ais/details/ships/shipid:674189/mmsi:441619000/imo:9490935/vessel:ARAON