Contact Full Name Daniel Vogedes email daniel.vogedes@uit.no Institution UiT The Arctic University of Norway Info Observation Facility Landing Page https://www.mare-incognitum.no/krop/ Observation Facility Type sea platform (fixed) Observation Facility Status Operational Core data Yes Observation Facility ID RiS ID(s) 11106 11107 Geospatial location Coordinates POINT (22.299317 80.295563) Height above mean sea level (m) -20.00 Environment Site Information Observatory moored with anchor weight. Bottom depth around 220 m. About 200 m of mooring line. Subsurface buoyancy at about 20 m water depth (hence the -20 m above sea level which refers to the start of the mooring line, not an actual instrument depth). Top 20 m left empty due to risk of ice scouring. Main "photo" is an example of a mooring diagram from 2021. Mooring setup is similar for other years, but does have changes in the details. Additional photos to illustrate some of the instrumentation. Data is available at https://archive.sigma2.no/ split up according to years and sensor types. Observed Variable(s) Observed Variable OCEANS>OCEAN TEMPERATURE>WATER TEMPERATURE Start Date 2006-09-01T12:00:00Z Instrument model and serial number Various instruments since 2006. Mostly SeaBird SBE16/19p, SBE56, SBE37. During the first years Vemco microloggers were used instead of SBE56. Instrument routine maintenance Instrument turnaround once a year. In most years, instruments will be sent to SeaBird for calibration. Often intercalibration with shipboard CTD. Sampling procedures Sampling intervals vary between 12 minutes (SBE56) and 4 hours (SBE16/19p). Observed Variable OCEANS>SALINITY/DENSITY>CONDUCTIVITY Start Date 2006-09-01T12:00:00Z Instrument model and serial number Various SeaBird SBE16/19p and SBE37 Instrument routine maintenance Instrument turnaround once a year. In most years, instruments will be sent to SeaBird for calibration. Often intercalibration with shipboard CTD. Sampling procedures Sampling interval between 2-4 hours year round Observed Variable OCEANS>SALINITY/DENSITY>SALINITY Start Date 2006-09-01T12:00:00Z Instrument model and serial number Various SeaBird SBE16/19p and SBE37 Instrument routine maintenance Instrument turnaround once a year. In most years, instruments will be sent to SeaBird for calibration. Often intercalibration with shipboard CTD. Sampling procedures Sampling interval between 2-4 hours year round. Derived variable from conductivity, temperature and depth. Observed Variable OCEANS>OCEAN OPTICS>FLUORESCENCE Start Date 2006-09-01T12:00:00Z Instrument model and serial number Various fluorescence sensors (Wetlabs and Seapoint) Instrument routine maintenance Annual check with fluorescence stick, occasional factory service. Sampling procedures Sampling interval 4 hours. Data published as raw voltage readings, as proper chlorophyll a fluorescence values would require regular water sampling for chl a calibration. Main point is to detect phytoplankton bloom timing, not absolute chl a values. Observed Variable OCEANS>OCEAN OPTICS>TURBIDITY Start Date 2006-09-01T12:00:00Z Instrument model and serial number Seapoint turbidity sensor Instrument routine maintenance Occasional calibration Sampling procedures Sampling interval 4 hours. Only deployed a few years. Observed Variable OCEANS>OCEAN ACOUSTICS>AMBIENT NOISE Start Date 2013-09-01T12:00:00Z Instrument model and serial number Multi-Electronique AURAL M2/M3 various s/n Instrument routine maintenance No specific maintenance Sampling procedures Hydrophone recording varied over the years. Mostly 10 min recording / hour but several years with power issues and incomplete recordings Observed Variable OCEANS>OCEAN ACOUSTICS>ACOUSTIC SCATTERING Start Date 2006-09-01T12:00:00Z Instrument model and serial number RDI Workhorse 300 kHz ADCP various s/n Instrument routine maintenance no specific maintenance, annual battery replacement and data recovery Sampling procedures Deployed at 100 m, one upward and one downward facing. 20 min ensemble interval, 1 min ping interval, 20 pings / ensemble, 30 depth cells, 4 m depth cell size Observed Variable OCEANS>MARINE SEDIMENTS>SEDIMENTATION Start Date 2006-09-01T12:00:00Z Instrument model and serial number McLane Mark 78H-21 Sediment trap 21-way on non-regular schedule (higher rate during peak sedimentation time). Instrument routine maintenance No specific maintenance, annual recovery, service and redeployment. Sampling procedures 500 ml bottles. Samples on 4% Formalin (mostly buffered with Borax, occasionally Hexamin, since 2023: no buffer) Standard sampling schedule: 1 16/09/2022 2 01/10/2022 3 01/11/2022 4 01/12/2022 5 01/01/2023 6 01/02/2023 7 01/03/2023 8 15/03/2023 9 29/03/2023 10 12/04/2023 11 26/04/2023 12 10/05/2023 13 24/05/2023 14 07/06/2023 15 21/06/2023 16 28/06/2023 17 05/07/2023 18 12/07/2023 19 19/07/2023 20 26/07/2023 21 09/08/2023 22 23/08/2023 (open) Additional photos
