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Virtasalo, Joonas J; Schröder, Jan F; Luoma, Samrit; Majaniemi, Juha; Mursu, Juha; Scholten, Jan Christoph (2019): Hydrographic data from the Hanko submarine groundwater discharge site, northern Baltic Sea, Finland. PANGAEA,, In supplement to: Virtasalo, JJ et al. (2019): Submarine groundwater discharge site in the First Salpausselkä ice-marginal formation, south Finland. Solid Earth, 10, 405-423,

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Water column profiles were measured at the locations of pockmarks B, D and E, using a Sea & Sun CTD90M multiprobe. The sensors for pressure, temperature, conductivity and optical dissolved oxygen in the multiprobe were manufactured by Sea & Sun Technology GmbH. The turbidity sensor was manufactured by Seapoint Sensors Inc., and the ISM-2001C inductive 2D current meter with compass by HS Engineers GmbH.
cesium; groundwater; loss on ignition; Oxygen; radon; Salinity; sand; seawater; submarine groundwater discharge; Temperature; turbidity
Median Latitude: 59.894287 * Median Longitude: 23.235333 * South-bound Latitude: 59.891680 * West-bound Longitude: 23.228930 * North-bound Latitude: 59.896180 * East-bound Longitude: 23.241300
Date/Time Start: 2018-05-24T16:20:11 * Date/Time End: 2018-05-25T12:16:55
Minimum DEPTH, water: 0.40 m * Maximum DEPTH, water: 11.65 m
Lappohja_pockmark_B * Latitude: 59.896180 * Longitude: 23.241300 * Method/Device: Multiple investigations (MULT)
Lappohja_pockmark_D * Latitude: 59.895000 * Longitude: 23.235770 * Method/Device: Multiple investigations (MULT)
Lappohja_pockmark_E * Latitude: 59.891680 * Longitude: 23.228930 * Method/Device: Multiple investigations (MULT)
#NameShort NameUnitPrincipal InvestigatorMethod/DeviceComment
1Event labelEventVirtasalo, Joonas J
2DATE/TIMEDate/TimeVirtasalo, Joonas JGeocode
3DEPTH, waterDepth watermVirtasalo, Joonas JGeocode – calculated from Pressure, g=9.81
4Pressure, waterPressdbarVirtasalo, Joonas JCTD90M multiprobe
5Temperature, waterTemp°CVirtasalo, Joonas JCTD90M multiprobe
6ConductivityCondmS/cmVirtasalo, Joonas JCTD90M multiprobe
7Turbidity (Formazin Turbidity Unit)TurbidityFTUVirtasalo, Joonas JCTD90M multiprobe, Seapoint Turbidity Meter
8Oxygen saturationO2 sat%Virtasalo, Joonas JCTD90M multiprobeDO_sat
9Oxygen, dissolvedDOmg/lVirtasalo, Joonas JCTD90M multiprobeDO_mg
10Oxygen saturation, per unit volume of the liquidO2 satml/lVirtasalo, Joonas JCTD90M multiprobeDO_ml
11Current directionDIRdegVirtasalo, Joonas JCTD90M multiprobe, ISM-2001CFlow direction
12Current velocity, horizontalCV horcm/sVirtasalo, Joonas JCTD90M multiprobe, ISM-2001CFlow velocity
13SalinitySalVirtasalo, Joonas JCTD90M multiprobePSU
14Density, sigma-theta (0)Sigma-thetakg/m3Virtasalo, Joonas JCTD90M multiprobeDensity
15Sound velocity in waterSVm/sVirtasalo, Joonas JCTD90M multiprobe
3106 data points

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