Stacking of discontinuous regional palaeoclimate records: Chironomid-based summer temperatures from the Alpine region
Since multi-site reconstructions are less affected by site-specific climatic effects and artefacts, regional palaeotemperature reconstructions based on a number of sites can provide more robust estimates of centennial- to millennial-scale temperature trends than individual, site-specific records. Fu...
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crsagepubl:10.1177/0959683614556382 2024-06-23T07:54:49+00:00 Stacking of discontinuous regional palaeoclimate records: Chironomid-based summer temperatures from the Alpine region Heiri, Oliver Ilyashuk, Boris Millet, Laurent Samartin, Stéphanie Lotter, André F 2014 http://dx.doi.org/10.1177/0959683614556382 http://journals.sagepub.com/doi/pdf/10.1177/0959683614556382 http://journals.sagepub.com/doi/full-xml/10.1177/0959683614556382 en eng SAGE Publications http://journals.sagepub.com/page/policies/text-and-data-mining-license The Holocene volume 25, issue 1, page 137-149 ISSN 0959-6836 1477-0911 journal-article 2014 crsagepubl https://doi.org/10.1177/0959683614556382 2024-06-04T06:25:41Z Since multi-site reconstructions are less affected by site-specific climatic effects and artefacts, regional palaeotemperature reconstructions based on a number of sites can provide more robust estimates of centennial- to millennial-scale temperature trends than individual, site-specific records. Furthermore, reconstructions based on multiple records are necessary for developing continuous climate records over time scales longer than covered by individual sequences. Here, we present a procedure for developing such reconstructions based on relatively short (centuries to millennia), discontinuously sampled records as are typically developed when using biotic proxies in lake sediments for temperature reconstruction. The approach includes an altitudinal correction of temperatures, an interpolation of individual records to equal time intervals, a stacking procedure for sections of the interval of interest that have the same records available, as well as a splicing procedure to link the individual stacked records into a continuous reconstruction. Variations in the final, stacked and spliced reconstruction are driven by variations in the individual records, whereas the absolute temperature values are determined by the stacked segment based on the largest number of records. With numerical simulations based on the NGRIP δ 18 O record, we demonstrate that the interpolation and stacking procedure provides an approximation of a smoothed palaeoclimate record if based on a sufficient number of discontinuously sampled records. Finally, we provide an example of a stacked and spliced palaeotemperature reconstruction 15000–90 calibrated 14 C yr BP based on six chironomid records from the northern and central Swiss Alps and eastern France to discuss the potential and limitations of this approach. Article in Journal/Newspaper NGRIP SAGE Publications The Holocene 25 1 137 149 |
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SAGE Publications |
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English |
description |
Since multi-site reconstructions are less affected by site-specific climatic effects and artefacts, regional palaeotemperature reconstructions based on a number of sites can provide more robust estimates of centennial- to millennial-scale temperature trends than individual, site-specific records. Furthermore, reconstructions based on multiple records are necessary for developing continuous climate records over time scales longer than covered by individual sequences. Here, we present a procedure for developing such reconstructions based on relatively short (centuries to millennia), discontinuously sampled records as are typically developed when using biotic proxies in lake sediments for temperature reconstruction. The approach includes an altitudinal correction of temperatures, an interpolation of individual records to equal time intervals, a stacking procedure for sections of the interval of interest that have the same records available, as well as a splicing procedure to link the individual stacked records into a continuous reconstruction. Variations in the final, stacked and spliced reconstruction are driven by variations in the individual records, whereas the absolute temperature values are determined by the stacked segment based on the largest number of records. With numerical simulations based on the NGRIP δ 18 O record, we demonstrate that the interpolation and stacking procedure provides an approximation of a smoothed palaeoclimate record if based on a sufficient number of discontinuously sampled records. Finally, we provide an example of a stacked and spliced palaeotemperature reconstruction 15000–90 calibrated 14 C yr BP based on six chironomid records from the northern and central Swiss Alps and eastern France to discuss the potential and limitations of this approach. |
format |
Article in Journal/Newspaper |
author |
Heiri, Oliver Ilyashuk, Boris Millet, Laurent Samartin, Stéphanie Lotter, André F |
spellingShingle |
Heiri, Oliver Ilyashuk, Boris Millet, Laurent Samartin, Stéphanie Lotter, André F Stacking of discontinuous regional palaeoclimate records: Chironomid-based summer temperatures from the Alpine region |
author_facet |
Heiri, Oliver Ilyashuk, Boris Millet, Laurent Samartin, Stéphanie Lotter, André F |
author_sort |
Heiri, Oliver |
title |
Stacking of discontinuous regional palaeoclimate records: Chironomid-based summer temperatures from the Alpine region |
title_short |
Stacking of discontinuous regional palaeoclimate records: Chironomid-based summer temperatures from the Alpine region |
title_full |
Stacking of discontinuous regional palaeoclimate records: Chironomid-based summer temperatures from the Alpine region |
title_fullStr |
Stacking of discontinuous regional palaeoclimate records: Chironomid-based summer temperatures from the Alpine region |
title_full_unstemmed |
Stacking of discontinuous regional palaeoclimate records: Chironomid-based summer temperatures from the Alpine region |
title_sort |
stacking of discontinuous regional palaeoclimate records: chironomid-based summer temperatures from the alpine region |
publisher |
SAGE Publications |
publishDate |
2014 |
url |
http://dx.doi.org/10.1177/0959683614556382 http://journals.sagepub.com/doi/pdf/10.1177/0959683614556382 http://journals.sagepub.com/doi/full-xml/10.1177/0959683614556382 |
genre |
NGRIP |
genre_facet |
NGRIP |
op_source |
The Holocene volume 25, issue 1, page 137-149 ISSN 0959-6836 1477-0911 |
op_rights |
http://journals.sagepub.com/page/policies/text-and-data-mining-license |
op_doi |
https://doi.org/10.1177/0959683614556382 |
container_title |
The Holocene |
container_volume |
25 |
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1 |
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137 |
op_container_end_page |
149 |
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1802647091136167936 |