Testing the consistency of Holocene and Last Glacial Maximum spatial correlations in temperature proxy records
- Holocene temperature proxy records are commonly used in quantitative synthesis and model-data comparisons. However, comparing correlations between time series from records collected in proximity to one another with the expected correlations based on climate model simulations indicates either regional or noisy climate signals in Holocene temperature proxy records. In this study, we evaluate the consistency of spatial correlations present in Holocene proxy records with those found in data from the Last Glacial Maximum (LGM). Specifically, we predict correlations expected in LGM proxy records if the only difference to Holocene correlations would be due to more time uncertainty and more climate variability in the LGM. We compare this simple prediction to the actual correlation structure in the LGM proxy records. We found that time series data of ice-core stable isotope records and planktonic foraminifera Mg/Ca ratios were consistent between the Holocene and LGM periods, while time series of Uk'37 proxy records were not as we found noHolocene temperature proxy records are commonly used in quantitative synthesis and model-data comparisons. However, comparing correlations between time series from records collected in proximity to one another with the expected correlations based on climate model simulations indicates either regional or noisy climate signals in Holocene temperature proxy records. In this study, we evaluate the consistency of spatial correlations present in Holocene proxy records with those found in data from the Last Glacial Maximum (LGM). Specifically, we predict correlations expected in LGM proxy records if the only difference to Holocene correlations would be due to more time uncertainty and more climate variability in the LGM. We compare this simple prediction to the actual correlation structure in the LGM proxy records. We found that time series data of ice-core stable isotope records and planktonic foraminifera Mg/Ca ratios were consistent between the Holocene and LGM periods, while time series of Uk'37 proxy records were not as we found no correlation between nearby LGM records. Our results support the finding of highly regional or noisy marine proxy records in the compilation analysed here and suggest the need for further studies on the role of climate proxies and the processes of climate signal recording and preservation.…
Author details: | Maria ReschkeORCiDGND, Igor KrönerORCiD, Thomas LaeppleORCiDGND |
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DOI: | https://doi.org/10.1002/jqs.3245 |
ISSN: | 0267-8179 |
ISSN: | 1099-1417 |
Title of parent work (English): | Journal of quaternary science : JQS |
Publisher: | Wiley |
Place of publishing: | New York |
Publication type: | Article |
Language: | English |
Date of first publication: | 2020/09/18 |
Publication year: | 2020 |
Release date: | 2023/10/11 |
Tag: | Holocene; LGM; Uk'37; spatial correlation; temperature |
Volume: | 36 |
Issue: | 1 |
Number of pages: | 9 |
First page: | 20 |
Last Page: | 28 |
Funding institution: | Initiative and Networking Fund of the Helmholtz Association [VG-NH900]; European Research Council (ERC) under the European Union's Horizon 2020; research and innovation programmeEuropean Research Council (ERC); [716092]; Helmholtz Climate Initiative REKLIM (Regional Climate Change),; a joint research project of the Helmholtz Association of German Research; Centres (HGF); Projekt DEAL |
Organizational units: | Mathematisch-Naturwissenschaftliche Fakultät / Institut für Geowissenschaften |
DDC classification: | 5 Naturwissenschaften und Mathematik / 55 Geowissenschaften, Geologie / 550 Geowissenschaften |
Peer review: | Referiert |
Publishing method: | Open Access / Hybrid Open-Access |
License (German): | CC-BY - Namensnennung 4.0 International |