Data Description

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Fritzsche, D et al. (2006): Age model and stable oxygen isotope mean values of ice core SZ99 from Akademii Nauk ice cap on Severnaya Zemlya. doi:10.1594/PANGAEA.511330,
Supplement to: Fritzsche, Diedrich; Schütt, Rainer; Meyer, Hanno; Miller, Heinz; Wilhelms, Frank; Opel, Thomas; Savatyugin, Lev M (2005): A 275 year ice core record from Akademii Nauk ice cap, Severnaya Zemlya, Russian Arctic. Annals of Glaciology, 42, 361-366, doi:10.3189/172756405781812862
Between 1999 and 2001, a 724 m long ice core was drilled on Akademii Nauk, the largest glacier on Severnaya Zemlya, Russian Arctic. The drilling site is located near the summit. The core is characterized by high melt-layer content. The melt layers are caused by melting and even by rain during the summer. We present high-resolution data of density, electrical conductivity (dielectrical profiling), stable water isotopes and melt-layer content for the upper 136 m (120 m w.e.) of the ice core. The dating by isotopic cycles and electrical conductivity peak identification suggests that this core section covers approximately the past 275 years. Singularities of volcanogenic and anthropogenic origin provide well-defined additional time markers. Long-term temperatures inferred from 12 year running mean averages of d18O reach their lowest level in the entire record around 1790. Thereafter the d18O values indicate a continuously increasing mean temperature on the Akademii Nauk ice cap until 1935, interrupted only by minor cooling episodes. The 20th century is found to be the warmest period in this record.
Latitude: 80.516660 * Longitude: 94.816660
Date/Time Start: 1999-05-01T00:00:00 * Date/Time End: 1999-05-01T00:00:00
Minimum DEPTH, ice/snow: 0.7 m * Maximum DEPTH, ice/snow: 136.5 m
SZ99 * * Latitude: 80.516660 * Longitude: 94.816660 * Date/Time: 1999-05-01T00:00:00 * Elevation: 750.0 m * Location: Akademii Nauk, Severnaya Zemlya, Russian Arctic * * Campaign: SZ_1999/2001 * * Device: Ice drill (ICEDRILL) *
#NameShort NameUnitPrincipal InvestigatorMethodComment
1DEPTH, ice/snow *Depth ice/snowmGeocode
2AGE *Ageka BPGeocode
3delta 18O, water *d18O H2Oper mil SMOWFritzsche, Diedrich *calculated average/mean values *1 m core section mean values
4Depth water equivalent *Depth w.e.mFritzsche, Diedrich *Calculated from density *
5Age, anno domini *Agea ADFritzsche, Diedrich *Age model, layer counting *counting of annual layer using dated volcano eruptions deeper than 1783 by polynominal approximation of dielectric profiling (DEP)
6Age, anno domini *Agea ADFritzsche, Diedrich *Age model, layer counting *counting of annual layer using dated volcano eruptions deeper than 1783 by linear approximation of dielectric profiling (DEP)
7delta 18O *d18Oper milFritzsche, Diedrich *Calculated moving averages *5 m core section mean values
676 data points

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