To what extent do water isotope records from low accumulation Alpine ice cores reproduce instrumental temperature series?
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...
Published in: | Tellus B: Chemical and Physical Meteorology |
---|---|
Main Authors: | , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
Stockholm University Press
2013
|
Subjects: | |
Online Access: | https://doi.org/10.3402/tellusb.v65i0.20148 https://doaj.org/article/cbd3c6af556b4733b2b9c3aadd18dc15 |
id |
ftdoajarticles:oai:doaj.org/article:cbd3c6af556b4733b2b9c3aadd18dc15 |
---|---|
record_format |
openpolar |
spelling |
ftdoajarticles:oai:doaj.org/article:cbd3c6af556b4733b2b9c3aadd18dc15 2023-05-15T16:39:19+02:00 To what extent do water isotope records from low accumulation Alpine ice cores reproduce instrumental temperature series? Pascal Bohleber Dietmar Wagenbach Wolfgang Schöner Reinhard Böhm 2013-04-01T00:00:00Z https://doi.org/10.3402/tellusb.v65i0.20148 https://doaj.org/article/cbd3c6af556b4733b2b9c3aadd18dc15 EN eng Stockholm University Press http://www.tellusb.net/index.php/tellusb/article/download/20148/pdf_1 https://doaj.org/toc/1600-0889 doi:10.3402/tellusb.v65i0.20148 1600-0889 https://doaj.org/article/cbd3c6af556b4733b2b9c3aadd18dc15 Tellus: Series B, Chemical and Physical Meteorology, Vol 65, Iss 0, Pp 1-17 (2013) Alpine ice cores stable water isotopes temperature proxy record Meteorology. Climatology QC851-999 article 2013 ftdoajarticles https://doi.org/10.3402/tellusb.v65i0.20148 2022-12-30T22:33:07Z 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 δ18O, δD in terms of atmospheric temperature changes. We evaluate the δ18O 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 δ18O 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 δ18O 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 Directory of Open Access Journals: DOAJ Articles Monte Rosa ENVELOPE(162.850,162.850,-70.917,-70.917) Tellus B: Chemical and Physical Meteorology 65 1 20148 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
Alpine ice cores stable water isotopes temperature proxy record Meteorology. Climatology QC851-999 |
spellingShingle |
Alpine ice cores stable water isotopes temperature proxy record Meteorology. Climatology QC851-999 Pascal Bohleber Dietmar Wagenbach Wolfgang Schöner Reinhard Böhm To what extent do water isotope records from low accumulation Alpine ice cores reproduce instrumental temperature series? |
topic_facet |
Alpine ice cores stable water isotopes temperature proxy record Meteorology. Climatology QC851-999 |
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 δ18O, δD in terms of atmospheric temperature changes. We evaluate the δ18O 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 δ18O 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 δ18O 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 |
Pascal Bohleber Dietmar Wagenbach Wolfgang Schöner Reinhard Böhm |
author_facet |
Pascal Bohleber Dietmar Wagenbach Wolfgang Schöner Reinhard Böhm |
author_sort |
Pascal Bohleber |
title |
To what extent do water isotope records from low accumulation Alpine ice cores reproduce instrumental temperature series? |
title_short |
To what extent do water isotope records from low accumulation Alpine ice cores reproduce instrumental temperature series? |
title_full |
To what extent do water isotope records from low accumulation Alpine ice cores reproduce instrumental temperature series? |
title_fullStr |
To what extent do water isotope records from low accumulation Alpine ice cores reproduce instrumental temperature series? |
title_full_unstemmed |
To what extent do water isotope records from low accumulation Alpine ice cores reproduce instrumental temperature series? |
title_sort |
to what extent do water isotope records from low accumulation alpine ice cores reproduce instrumental temperature series? |
publisher |
Stockholm University Press |
publishDate |
2013 |
url |
https://doi.org/10.3402/tellusb.v65i0.20148 https://doaj.org/article/cbd3c6af556b4733b2b9c3aadd18dc15 |
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_source |
Tellus: Series B, Chemical and Physical Meteorology, Vol 65, Iss 0, Pp 1-17 (2013) |
op_relation |
http://www.tellusb.net/index.php/tellusb/article/download/20148/pdf_1 https://doaj.org/toc/1600-0889 doi:10.3402/tellusb.v65i0.20148 1600-0889 https://doaj.org/article/cbd3c6af556b4733b2b9c3aadd18dc15 |
op_doi |
https://doi.org/10.3402/tellusb.v65i0.20148 |
container_title |
Tellus B: Chemical and Physical Meteorology |
container_volume |
65 |
container_issue |
1 |
container_start_page |
20148 |
_version_ |
1766029651373719552 |