Mortazavi 2009 Chronology and Correlations of High Arctic Lakes Based on Magnetic Properties

• Format: Dataset
• Language: unknown
• Published: Arctic Data Center 2013
• Subjects: EARTH SCIENCE > LAND SURFACE > EROSION/SEDIMENTATION > SEDIMENTS; EARTH SCIENCE > OCEANS > OCEAN TEMPERATURE > WATER TEMPERATURE; EARTH SCIENCE > TERRESTRIAL HYDROSPHERE > GLACIERS/ICE SHEETS > GLACIER MASS BALANCE/ICE SHEET MASS BALANCE; EARTH SCIENCE > PALEOCLIMATE > OCEAN/LAKE RECORDS > LAKE LEVELS; EARTH SCIENCE > PALEOCLIMATE > LAND RECORDS > SEDIMENTS; EARTH SCIENCE > PALEOCLIMATE > OCEAN/LAKE RECORDS > SEDIMENTS; EARTH SCIENCE > PALEOCLIMATE > OCEAN/LAKE RECORDS > VARVE DEPOSITS; EARTH SCIENCE > LAND SURFACE > EROSION/SEDIMENTATION > DEGRADATION; EARTH SCIENCE > LAND SURFACE > EROSION/SEDIMENTATION > SEDIMENT TRANSPORT; EARTH SCIENCE > CRYOSPHERE > GLACIERS/ICE SHEETS > GLACIER MASS BALANCE/ICE SHEET MASS BALANCE; EARTH SCIENCE > OCEANS > MARINE SEDIMENTS > SEDIMENT TRANSPORT; EARTH SCIENCE > OCEANS > MARINE SEDIMENTS > TURBIDITY; EARTH SCIENCE > LAND SURFACE > LAND TEMPERATURE > LAND SURFACE TEMPERATURE; EARTH SCIENCE > LAND SURFACE > EROSION/SEDIMENTATION > ENTRAINMENT; EARTH SCIENCE > TERRESTRIAL HYDROSPHERE > GLACIERS/ICE SHEETS > GLACIERS; EARTH SCIENCE > CRYOSPHERE > GLACIERS/ICE SHEETS > GLACIERS; EARTH SCIENCE > LAND SURFACE > EROSION/SEDIMENTATION > SEDIMENTATION; EARTH SCIENCE > CRYOSPHERE > FROZEN GROUND > SOIL TEMPERATURE; EARTH SCIENCE > CRYOSPHERE > FROZEN GROUND > PERIGLACIAL PROCESSES; EARTH SCIENCE > LAND SURFACE > EROSION/SEDIMENTATION > SUSPENDED SOLIDS; IN SITU/LABORATORY INSTRUMENTS > SAMPLERS > GRABBERS/TRAPS/COLLECTORS > SEDIMENT TRAPS; IN SITU/LABORATORY INSTRUMENTS > CORERS > SEDIMENT CORERS; IN SITU/LABORATORY INSTRUMENTS > CONDUCTIVITY SENSORS > CONDUCTIVITY METERS; EARTH REMOTE SENSING INSTRUMENTS > PASSIVE REMOTE SENSING > PHOTON/OPTICAL DETECTORS > CAMERAS > CAMERAS; EARTH REMOTE SENSING INSTRUMENTS > PASSIVE REMOTE SENSING > PROFILERS/SOUNDERS > TEMPERATURE PROFILERS; IN SITU/LABORATORY INSTRUMENTS > RECORDERS/LOGGERS > TEMPERATURE LOGGERS; IN SITU/LABORATORY INSTRUMENTS > GAUGES > STREAM GAUGES; EARTH REMOTE SENSING INSTRUMENTS > PASSIVE REMOTE SENSING > POSITIONING/NAVIGATION > GPS > GPS > GLOBAL POSITIONING SYSTEM; EARTH REMOTE SENSING INSTRUMENTS > ACTIVE REMOTE SENSING > PROFILERS/SOUNDERS > ACOUSTIC SOUNDERS > ECHO SOUNDERS; IN SITU/LABORATORY INSTRUMENTS > PROBES > PROBES; IN SITU/LABORATORY INSTRUMENTS > CORERS > CORING DEVICES; IN SITU/LABORATORY INSTRUMENTS > PROBES > STEEL MEASURING TAPE; IN SITU/LABORATORY INSTRUMENTS > CURRENT/WIND METERS > CURRENT METERS; MANNED FIELD STATION; HOURLY TO DAILY; DAILY TO WEEKLY; ANNUAL; 1 MINUTE TO 1 HOUR; MONTHLY TO ANNUAL; WEEKLY TO MONTHLY; Arctic; Kongressvatnet; Linnévatnet; Ice Sheet; Spitsbergen
• Online Access: https://search.dataone.org/view/urn:uuid:891fa90e-dcc8-4f8a-9936-d417a7512c19

Abstract: Located at 78ºN, the island of Spitsbergen is covered by small glacal lakes. Linnévatent and Kongressvanet are two such lakes and are separated by about five kilometers along the western coast. These lakes have been part of an ongoing study to better understand the present and past climate changes. Chronology for cores recovered from these lakes is especially hard to establish, due to large amounts of detrial coal as well as the depletion of 14 C due to carbonate dissolution make 14 C-dating methods unreliable. During the summer of 2008 three cores were recovered from Linnévatnet with lengths of 32cm, 35cm and 65cm, near mooring sites D (core L08D), F (core L08F) and G (core L08G) respectively. In addition, one core (K08) from Kongressvatnet had a length of 67cm was collected. These were analyzed for paleomagnetic data finding that the K08 core gave a corrupted record, most likely due to the presence of gregite as shown by the environmental records. The Linnevatnet cores gave reliable records, with the longer record (L08G) having a sudden drop in declination at 33cm. This drop was the basis of the two age models. Age Model I based on the record given and dates the core to be 3500 years old. Age Model II involves a rotation of the declination data an dates the core to be ~350 years old. Based on grain size changes indicated by the environmental magnetic data as well as varve analysis of a similar core Age Model II is determined to be more valid, dating L08G to ~350 years BP. In addition L08D and L08F did not show enough variation to be compared to longer timescale, thus were only dated using Age Model II; giving ages of ~140 years BP for both cores.