Forest Ecosystem Monitoring Cooperative(802) 656-0683femc@uvm.eduwww.uvm.edu/femc705 Spear StreetSouth BurlingtonVermont05403United States of AmericaUniversity of Vermont Rubenstein School of Environment and Natural ResourcesleadLake Champlain CTD data (R/V Melosira 2012-2021)CTD profiles collected in Lake Champlain (Vermont, New York, Quebec) during research and outreach trips on University of Vermont's R/V Melosira between 2012 and 2021.Lake Champlain CTD data (R/V Melosira 2012-2021)StockwellJasonDeaneOwenMcReynoldsAmeliaSundbergSilvaMoralesAnawaterwater columnlake champlainwater monitoringSeabird CTD data R/V Melosira2012-04-102021-08-05This dataset includes 504 CTD profiles taken on Lake Champlain by University of Vermont researchers between April 2012 to August 2021. Data were collected with a Seabird SBE 19 Plus CTD deployed from the University's research vessel, the R/V Melosira. The dataset includes measurements of several physicochemical attributes, including conductivity, salinity, oxygen saturation, temperature, PAR/Irradiance, and fluorescence. CTD casts were taken for various projects being conducted by researchers at the Rubenstein Ecosystem Science lab, including bottom trawling, plankton sampling, and for educational purposes during University of Vermont classes. 20251006163140_SeabirdCTDMelosira_2012-2021_v1.csvVMC.1826.4045mySQLMcReynolds, A., Sundberg, S. Deane, O., Morales, A., and Stockwell, J. (2026). Seabird CTD data: R/V Melosira 2012-2021. Forest Ecosystem Monitoring Cooperative. Available online at: https://www.uvm.edu/femc/data/archive/project/seabird-ctd-data-r-v-melosirahttps://vmc.w3.uvm.edu/vmcdevel/CI4/data/archive/project/seabird-ctd-data-r-v-melosira/dataset/seabird-ctd-data-rv-melosirafile_namefile_nameFile name to link the metadata & profile data extracted from each cast's raw data (.CNV) filetextsampleIDsampleIDUnique sample ID based on the gear type, date, and CTD cast within that date in the format CTD_MMDDYYYY_#. Example: The third cast of the day on October 7, 2015 would have the sampleID CTD_10072015_3. textYearYearYear cast was takendateYYYY-1date_startDateDate the CTD cast was takendateMM/DD/YYTimeTimeStart time of cast, local timetimehh:mm:ssBasinBasinLake Champlain major basin: Main Lake, Malletts Bay, or Inland SeatextRegionRegionLake Champlain region based on coordinates and/or field notes: North, Central, or South Main Lake; Inland Sea; Malletts BaytextMajorManagMajor management basinNumeric description of major basin in Lake ChamplaintextMinorManagMinor management basinNumeric description of minor basin (within major basin) in Lake ChamplaintextLat_DDLatitudeLatitude in decimal degrees (WGS84) for CTD cast; reported to 6 decimal places but may have been recorded to as few as 3 decimal placesdecimal0.001rational44.14445.003Long_DDLongitudeLongitude in decimal degrees (WGS84) for CTD cast; reported to 6 decimal places but may have been recorded to as few as 3 decimal placesdecimal0.001-73.414-73.054Estimated_CoordinatesEstimated CoordinatesA value of 1 indicates missing coordinates which were estimated based on site descriptions from R/V Melosira ship logs.intdepFMDepth [fresh water, m]Depth in meters from the water surface. Measurements taken at negative depths (above water surface) have been removed.decimal0.001rational0122c0mS_cmConductivity [mS/cm]Conductivity measured in milliSiemens per centimeterdecimal0.000001rational00.938dz_dtMDescent Rate [m/s]Rate CTD descended in water column decimal0.001rational01.56timeSTime, Elapsed [seconds]Time in seconds since start of CTD casttime0.01rational0901.75sal00Salinity, Practical [PSU]Salinitydecimal0.0001rational00.74oxsatML_LOxygen Saturation, Weiss [mL/L]Recorded on SBE 43 Dissolved Oxygen Sensordecimal0.00001rational4.231819.71769tv290CTemperature [ITS-90, deg C]Water temperature in degrees Celsiusdecimal0.0001rational1.784627.8008parPAR/Irradiance, Biospherical/LicorMeasured with LI-193 Spherical Quantum Sensordecimal0.000001rational0.0267394265.1wetStarFluorescence, WET Labs WETstardecimal0.0001rational018.8606ScanScanSequential scan number recorded during each cast, as an index for when each row of data was collected. Only present for some years.intinteger1999flagFlagMeasurements with data outside normal value ranges are flagged with 1. int