Temperature and mineral dust variability recorded of ice core Colle_Gnifetti_KCC
Among ice core drilling sites in the European Alps, Colle Gnifetti (CG) is the only non-temperate glacier to offer climate records back to at least 1000 years. This unique long-term archive is the result of an exceptionally low net accumulation driven by wind erosion and rapid annual layer thinning....
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ftpangaea:oai:pangaea.de:doi:10.1594/PANGAEA.883521 2023-05-15T16:38:50+02:00 Temperature and mineral dust variability recorded of ice core Colle_Gnifetti_KCC Bohleber, Pascal Erhardt, Tobias Spaulding, Nicole Hoffmann, Helene Fischer, Hubertus Mayewski, Paul LATITUDE: 45.928930 * LONGITUDE: 7.876260 * DATE/TIME START: 2013-08-04T00:00:00 * DATE/TIME END: 2013-08-11T00:00:00 2017-11-23 application/zip, 2 datasets https://doi.pangaea.de/10.1594/PANGAEA.883521 https://doi.org/10.1594/PANGAEA.883521 en eng PANGAEA https://doi.pangaea.de/10.1594/PANGAEA.883521 https://doi.org/10.1594/PANGAEA.883521 CC-BY-3.0: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess CC-BY Supplement to: Bohleber, Pascal; Erhardt, Tobias; Spaulding, Nicole; Hoffmann, Helene; Fischer, Hubertus; Mayewski, Paul (2018): Temperature and mineral dust variability recorded in two low-accumulation Alpine ice cores over the last millennium. Climate of the Past, 14(1), 21-37, https://doi.org/10.5194/cp-14-21-2018 Colle_Gnifetti_KCC Colle Gnifetti Monte Rosa Swiss Alps ICEDRILL Ice drill Dataset 2017 ftpangaea https://doi.org/10.1594/PANGAEA.883521 https://doi.org/10.5194/cp-14-21-2018 2023-01-20T07:34:04Z Among ice core drilling sites in the European Alps, Colle Gnifetti (CG) is the only non-temperate glacier to offer climate records back to at least 1000 years. This unique long-term archive is the result of an exceptionally low net accumulation driven by wind erosion and rapid annual layer thinning. However, the full exploitation of the CG time series has been hampered by considerable dating uncertainties and the seasonal summer bias in snow preservation. Using a new core drilled in 2013 we extend annual layer counting, for the first time at CG, over the last 1000 years and add additional constraints to the resulting age scale from radiocarbon dating. Based on this improved age scale, and using a multi-core approach with a neighboring ice core, we explore the time series of stable water isotopes and the mineral dust proxies Ca2+ and insoluble particles. Also in our latest ice core we face the already known limitation to the quantitative use of the stable isotope variability based on a high and potentially non-stationary isotope/temperature sensitivity at CG. Decadal trends in Ca2+ reveal substantial agreement with instrumental temperature and are explored here as a potential site-specific supplement to the isotope-based temperature reconstruction. The observed coupling between temperature and Ca2+-trends likely results from snow preservation effects and the advection of dust-rich air masses coinciding with warm temperatures.We find that if calibrated against instrumental data, the Ca2+-based temperature reconstruction is in robust agreement with the latest proxy-based summer temperature reconstruction, including a "Little Ice Age" cold period as well as a medieval climate anomaly. Part of the medieval climate period around 1100-1200 AD clearly stands out through an increased occurrence of dust events, potentially resulting from a relative increase in meridional flow and/or dry conditions over the Mediterranean. Dataset ice core PANGAEA - Data Publisher for Earth & Environmental Science Monte Rosa ENVELOPE(162.850,162.850,-70.917,-70.917) ENVELOPE(7.876260,7.876260,45.928930,45.928930) |
institution |
Open Polar |
collection |
PANGAEA - Data Publisher for Earth & Environmental Science |
op_collection_id |
ftpangaea |
language |
English |
topic |
Colle_Gnifetti_KCC Colle Gnifetti Monte Rosa Swiss Alps ICEDRILL Ice drill |
spellingShingle |
Colle_Gnifetti_KCC Colle Gnifetti Monte Rosa Swiss Alps ICEDRILL Ice drill Bohleber, Pascal Erhardt, Tobias Spaulding, Nicole Hoffmann, Helene Fischer, Hubertus Mayewski, Paul Temperature and mineral dust variability recorded of ice core Colle_Gnifetti_KCC |
topic_facet |
Colle_Gnifetti_KCC Colle Gnifetti Monte Rosa Swiss Alps ICEDRILL Ice drill |
description |
Among ice core drilling sites in the European Alps, Colle Gnifetti (CG) is the only non-temperate glacier to offer climate records back to at least 1000 years. This unique long-term archive is the result of an exceptionally low net accumulation driven by wind erosion and rapid annual layer thinning. However, the full exploitation of the CG time series has been hampered by considerable dating uncertainties and the seasonal summer bias in snow preservation. Using a new core drilled in 2013 we extend annual layer counting, for the first time at CG, over the last 1000 years and add additional constraints to the resulting age scale from radiocarbon dating. Based on this improved age scale, and using a multi-core approach with a neighboring ice core, we explore the time series of stable water isotopes and the mineral dust proxies Ca2+ and insoluble particles. Also in our latest ice core we face the already known limitation to the quantitative use of the stable isotope variability based on a high and potentially non-stationary isotope/temperature sensitivity at CG. Decadal trends in Ca2+ reveal substantial agreement with instrumental temperature and are explored here as a potential site-specific supplement to the isotope-based temperature reconstruction. The observed coupling between temperature and Ca2+-trends likely results from snow preservation effects and the advection of dust-rich air masses coinciding with warm temperatures.We find that if calibrated against instrumental data, the Ca2+-based temperature reconstruction is in robust agreement with the latest proxy-based summer temperature reconstruction, including a "Little Ice Age" cold period as well as a medieval climate anomaly. Part of the medieval climate period around 1100-1200 AD clearly stands out through an increased occurrence of dust events, potentially resulting from a relative increase in meridional flow and/or dry conditions over the Mediterranean. |
format |
Dataset |
author |
Bohleber, Pascal Erhardt, Tobias Spaulding, Nicole Hoffmann, Helene Fischer, Hubertus Mayewski, Paul |
author_facet |
Bohleber, Pascal Erhardt, Tobias Spaulding, Nicole Hoffmann, Helene Fischer, Hubertus Mayewski, Paul |
author_sort |
Bohleber, Pascal |
title |
Temperature and mineral dust variability recorded of ice core Colle_Gnifetti_KCC |
title_short |
Temperature and mineral dust variability recorded of ice core Colle_Gnifetti_KCC |
title_full |
Temperature and mineral dust variability recorded of ice core Colle_Gnifetti_KCC |
title_fullStr |
Temperature and mineral dust variability recorded of ice core Colle_Gnifetti_KCC |
title_full_unstemmed |
Temperature and mineral dust variability recorded of ice core Colle_Gnifetti_KCC |
title_sort |
temperature and mineral dust variability recorded of ice core colle_gnifetti_kcc |
publisher |
PANGAEA |
publishDate |
2017 |
url |
https://doi.pangaea.de/10.1594/PANGAEA.883521 https://doi.org/10.1594/PANGAEA.883521 |
op_coverage |
LATITUDE: 45.928930 * LONGITUDE: 7.876260 * DATE/TIME START: 2013-08-04T00:00:00 * DATE/TIME END: 2013-08-11T00:00:00 |
long_lat |
ENVELOPE(162.850,162.850,-70.917,-70.917) ENVELOPE(7.876260,7.876260,45.928930,45.928930) |
geographic |
Monte Rosa |
geographic_facet |
Monte Rosa |
genre |
ice core |
genre_facet |
ice core |
op_source |
Supplement to: Bohleber, Pascal; Erhardt, Tobias; Spaulding, Nicole; Hoffmann, Helene; Fischer, Hubertus; Mayewski, Paul (2018): Temperature and mineral dust variability recorded in two low-accumulation Alpine ice cores over the last millennium. Climate of the Past, 14(1), 21-37, https://doi.org/10.5194/cp-14-21-2018 |
op_relation |
https://doi.pangaea.de/10.1594/PANGAEA.883521 https://doi.org/10.1594/PANGAEA.883521 |
op_rights |
CC-BY-3.0: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.1594/PANGAEA.883521 https://doi.org/10.5194/cp-14-21-2018 |
_version_ |
1766029180913319936 |