Journal cover Journal topic
Earth System Science Data The Data Publishing Journal
https://doi.org/10.5194/essd-2017-44
© Author(s) 2017. This work is distributed under
the Creative Commons Attribution 3.0 License.
 
16 Jun 2017
Review status
This discussion paper is a preprint. A revision of this manuscript was accepted for the journal Earth System Science Data (ESSD) and is expected to appear here in due course.
Speleothem stable isotope reference records for East-Central Europe – Resampling sedimentary proxy records to get evenly spaced time-series with spectral control
István Gábor Hatvani1, Zoltán Kern1, Szabolcs Leél-Őssy2, and Attila Demény1 1Institute for Geological and Geochemical Research, Research Centre for Astronomy and Earth Sciences, Hungarian Academy of Sciences, Budapest, Budaörsi út 45, H-1112, Hungary
2Eötvös Loránd University, Department of Physical and Applied Geology, Budapest, Pázmány Péter stny. 1/C, H-1117, Hungary
Abstract. Uneven spacing is a common feature of sedimentary paleoclimate records, in many cases causing difficulties in the application of classical statistical and time series methods. Although special statistical tools do exist to assess unevenly spaced data directly, the transformation of such data to a temporarily equidistant time series applicable to commonly used statistical tools remains, however, an unachieved goal. The present paper, therefore, introduces an approach to obtain evenly spaced time series (using cubic spline fitting) from unevenly spaced speleothem records with the application of a spectral control to avoid spectral bias caused by interpolation and retain the original spectral characteristics of the data. The methodology was applied to stable carbon and oxygen isotope records derived from two stalagmites of the Baradla Cave (NE Hungary) dating back to the late 18th century; it was also applied to additional well-dated and high-resolution stable isotope records from the Han-sur-Lesse Cave (Belgium). To show the benefit of these equally spaced records to climate studies, their coherence with primary and complex climate indices is explored using wavelet transform coherence and discussed. The results shed light on clear relationships with climate and NAO indices, lending support to the approach utilized in this study. Moreover, these suggest that the Baradla composite stable isotope data can serve as regional reference records for the past ~200 years. The equally spaced time series obtained, are available at: https://doi.org/10.1594/PANGAEA.875917.

Citation: Hatvani, I. G., Kern, Z., Leél-Őssy, S., and Demény, A.: Speleothem stable isotope reference records for East-Central Europe – Resampling sedimentary proxy records to get evenly spaced time-series with spectral control, Earth Syst. Sci. Data Discuss., https://doi.org/10.5194/essd-2017-44, in review, 2017.
István Gábor Hatvani et al.

Data sets

Speleothem stable isotope reference records resampled to evenly spaced time-series
I. Gábor Hatvani, Z. Kern, and A. Demény
https://doi.org/10.1594/PANGAEA.875917
István Gábor Hatvani et al.

Viewed

Total article views: 324 (including HTML, PDF, and XML)

HTML PDF XML Total BibTeX EndNote
255 58 11 324 5 10

Views and downloads (calculated since 16 Jun 2017)

Cumulative views and downloads (calculated since 16 Jun 2017)

Viewed (geographical distribution)

Total article views: 324 (including HTML, PDF, and XML)

Thereof 324 with geography defined and 0 with unknown origin.

Country # Views %
  • 1

Saved

Discussed

Latest update: 18 Jan 2018
Download
Short summary
Evenly spaced carbon- and oxygen stable isotope records were produced from Central European stalagmites. To mitigate the potential bias of interpolation, the variance spectra was carefully evaluated. The derived data are ready to use with conventional uni-, and multivariate statistics, which are usually not prepared to handle the general characteristic of sedimentary paleoclimate records derived from geological sequences unevenly sampled in time.
Evenly spaced carbon- and oxygen stable isotope records were produced from Central European...
Share