Annual means of delta 18O time series Colle Gnifetti ice cores, supplement to: Bohleber, Pascal; Wagenbach, Dietmar; Schöner, Wolfgang; Böhm, Reinhard (2013): To what extent do water isotope records from low accumulation Alpine ice cores reproduce instrumental temperature series? Tellus Series B-Chemical and Physical Meteorology, 65(1), 20148
Among Alpine ice core drilling sites, the Colle Gnifetti glacier saddle situated in the Monte Rosa summit range is the only one whose net snow accumulation rate is low enough to offer climate records back to some 1000 yr. It is demonstrated that the strong snow erosion at this site particularly hamp...
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Online Access: | https://dx.doi.org/10.1594/pangaea.874205 https://doi.pangaea.de/10.1594/PANGAEA.874205 |
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ftdatacite:10.1594/pangaea.874205 2023-05-15T16:39:25+02:00 Annual means of delta 18O time series Colle Gnifetti ice cores, supplement to: Bohleber, Pascal; Wagenbach, Dietmar; Schöner, Wolfgang; Böhm, Reinhard (2013): To what extent do water isotope records from low accumulation Alpine ice cores reproduce instrumental temperature series? Tellus Series B-Chemical and Physical Meteorology, 65(1), 20148 Bohleber, Pascal Wagenbach, Dietmar Schöner, Wolfgang Böhm, Reinhard 2013 application/zip https://dx.doi.org/10.1594/pangaea.874205 https://doi.pangaea.de/10.1594/PANGAEA.874205 en eng PANGAEA - Data Publisher for Earth & Environmental Science https://dx.doi.org/10.3402/tellusb.v65i0.20148 Creative Commons Attribution 3.0 Unported https://creativecommons.org/licenses/by/3.0/legalcode cc-by-3.0 CC-BY article Supplementary Collection of Datasets Collection 2013 ftdatacite https://doi.org/10.1594/pangaea.874205 https://doi.org/10.3402/tellusb.v65i0.20148 2022-02-09T13:31:34Z Among Alpine ice core drilling sites, the Colle Gnifetti glacier saddle situated in the Monte Rosa summit range is the only one whose net snow accumulation rate is low enough to offer climate records back to some 1000 yr. It is demonstrated that the strong snow erosion at this site particularly hampers the interpretation of stable water isotope records d18O, dD in terms of atmospheric temperature changes. We evaluate the d18O records from four Colle Gnifetti cores for their common variability to extract a composite isotope record that may be compared with the instrumental temperature evidence. Time series analyses over the last 120 yr reveal that the common d18O signal is mainly reflected in the low frequency variability, starting at the decadal scale. Comparing the correspondingly smoothed composite record to the high-elevation temperature time series (specifically adjusted to the seasonality of the net snow accumulation) reveals the following findings: On the decadal scale, the isotope variability correlates with the temperature record at around R=0.65 but is interrupted by three, ca. 10-yr long mismatch periods. The multidecadal isotope signal closely reflects the strong overall 20th century temperature increase, thereby showing an up to three-fold higher isotope temperature sensitivity than commonly assumed. Over the entire instrumental period back to 1760, five more such mismatch periods are embedded in the generally coherent pattern of the d18O and instrumental temperature records (including the strong overestimate of the temperature around 1850 by the isotope temperature proxy). For the early instrumental period (1890-1760) characterized by a comparably weak long-term temperature trend, the isotope signal generally suggests warmer conditions of about 0.4°C compared to instrumental data. Article in Journal/Newspaper ice core DataCite Metadata Store (German National Library of Science and Technology) Monte Rosa ENVELOPE(162.850,162.850,-70.917,-70.917) |
institution |
Open Polar |
collection |
DataCite Metadata Store (German National Library of Science and Technology) |
op_collection_id |
ftdatacite |
language |
English |
description |
Among Alpine ice core drilling sites, the Colle Gnifetti glacier saddle situated in the Monte Rosa summit range is the only one whose net snow accumulation rate is low enough to offer climate records back to some 1000 yr. It is demonstrated that the strong snow erosion at this site particularly hampers the interpretation of stable water isotope records d18O, dD in terms of atmospheric temperature changes. We evaluate the d18O records from four Colle Gnifetti cores for their common variability to extract a composite isotope record that may be compared with the instrumental temperature evidence. Time series analyses over the last 120 yr reveal that the common d18O signal is mainly reflected in the low frequency variability, starting at the decadal scale. Comparing the correspondingly smoothed composite record to the high-elevation temperature time series (specifically adjusted to the seasonality of the net snow accumulation) reveals the following findings: On the decadal scale, the isotope variability correlates with the temperature record at around R=0.65 but is interrupted by three, ca. 10-yr long mismatch periods. The multidecadal isotope signal closely reflects the strong overall 20th century temperature increase, thereby showing an up to three-fold higher isotope temperature sensitivity than commonly assumed. Over the entire instrumental period back to 1760, five more such mismatch periods are embedded in the generally coherent pattern of the d18O and instrumental temperature records (including the strong overestimate of the temperature around 1850 by the isotope temperature proxy). For the early instrumental period (1890-1760) characterized by a comparably weak long-term temperature trend, the isotope signal generally suggests warmer conditions of about 0.4°C compared to instrumental data. |
format |
Article in Journal/Newspaper |
author |
Bohleber, Pascal Wagenbach, Dietmar Schöner, Wolfgang Böhm, Reinhard |
spellingShingle |
Bohleber, Pascal Wagenbach, Dietmar Schöner, Wolfgang Böhm, Reinhard Annual means of delta 18O time series Colle Gnifetti ice cores, supplement to: Bohleber, Pascal; Wagenbach, Dietmar; Schöner, Wolfgang; Böhm, Reinhard (2013): To what extent do water isotope records from low accumulation Alpine ice cores reproduce instrumental temperature series? Tellus Series B-Chemical and Physical Meteorology, 65(1), 20148 |
author_facet |
Bohleber, Pascal Wagenbach, Dietmar Schöner, Wolfgang Böhm, Reinhard |
author_sort |
Bohleber, Pascal |
title |
Annual means of delta 18O time series Colle Gnifetti ice cores, supplement to: Bohleber, Pascal; Wagenbach, Dietmar; Schöner, Wolfgang; Böhm, Reinhard (2013): To what extent do water isotope records from low accumulation Alpine ice cores reproduce instrumental temperature series? Tellus Series B-Chemical and Physical Meteorology, 65(1), 20148 |
title_short |
Annual means of delta 18O time series Colle Gnifetti ice cores, supplement to: Bohleber, Pascal; Wagenbach, Dietmar; Schöner, Wolfgang; Böhm, Reinhard (2013): To what extent do water isotope records from low accumulation Alpine ice cores reproduce instrumental temperature series? Tellus Series B-Chemical and Physical Meteorology, 65(1), 20148 |
title_full |
Annual means of delta 18O time series Colle Gnifetti ice cores, supplement to: Bohleber, Pascal; Wagenbach, Dietmar; Schöner, Wolfgang; Böhm, Reinhard (2013): To what extent do water isotope records from low accumulation Alpine ice cores reproduce instrumental temperature series? Tellus Series B-Chemical and Physical Meteorology, 65(1), 20148 |
title_fullStr |
Annual means of delta 18O time series Colle Gnifetti ice cores, supplement to: Bohleber, Pascal; Wagenbach, Dietmar; Schöner, Wolfgang; Böhm, Reinhard (2013): To what extent do water isotope records from low accumulation Alpine ice cores reproduce instrumental temperature series? Tellus Series B-Chemical and Physical Meteorology, 65(1), 20148 |
title_full_unstemmed |
Annual means of delta 18O time series Colle Gnifetti ice cores, supplement to: Bohleber, Pascal; Wagenbach, Dietmar; Schöner, Wolfgang; Böhm, Reinhard (2013): To what extent do water isotope records from low accumulation Alpine ice cores reproduce instrumental temperature series? Tellus Series B-Chemical and Physical Meteorology, 65(1), 20148 |
title_sort |
annual means of delta 18o time series colle gnifetti ice cores, supplement to: bohleber, pascal; wagenbach, dietmar; schöner, wolfgang; böhm, reinhard (2013): to what extent do water isotope records from low accumulation alpine ice cores reproduce instrumental temperature series? tellus series b-chemical and physical meteorology, 65(1), 20148 |
publisher |
PANGAEA - Data Publisher for Earth & Environmental Science |
publishDate |
2013 |
url |
https://dx.doi.org/10.1594/pangaea.874205 https://doi.pangaea.de/10.1594/PANGAEA.874205 |
long_lat |
ENVELOPE(162.850,162.850,-70.917,-70.917) |
geographic |
Monte Rosa |
geographic_facet |
Monte Rosa |
genre |
ice core |
genre_facet |
ice core |
op_relation |
https://dx.doi.org/10.3402/tellusb.v65i0.20148 |
op_rights |
Creative Commons Attribution 3.0 Unported https://creativecommons.org/licenses/by/3.0/legalcode cc-by-3.0 |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.1594/pangaea.874205 https://doi.org/10.3402/tellusb.v65i0.20148 |
_version_ |
1766029752944033792 |