Greenland accumulation and its connection to the large-scale atmospheric circulation in ERA-Interim and paleoclimate simulations
Changes in Greenland accumulation and the stability in the relationship between accumulation variability and large-scale circulation are assessed by performing time-slice simulations for the present day, the preindustrial era, the early Holocene, and the Last Glacial Maximum (LGM) with a comprehensi...
Main Authors: | , , , , , |
---|---|
Format: | Text |
Language: | English |
Published: |
Copernicus Publications
2013
|
Subjects: | |
Online Access: | https://dx.doi.org/10.7892/boris.47745 http://boris.unibe.ch/47745/ |
id |
ftdatacite:10.7892/boris.47745 |
---|---|
record_format |
openpolar |
spelling |
ftdatacite:10.7892/boris.47745 2023-05-15T16:25:30+02:00 Greenland accumulation and its connection to the large-scale atmospheric circulation in ERA-Interim and paleoclimate simulations Stocker, Thomas Prange, M. Raible, Christoph Varma, V. Merz, Niklaus Fischer, Hubertus 2013 application/pdf https://dx.doi.org/10.7892/boris.47745 http://boris.unibe.ch/47745/ en eng Copernicus Publications info:eu-repo/semantics/openAccess 550 Earth sciences & geology 530 Physics Text article-journal ScholarlyArticle 2013 ftdatacite https://doi.org/10.7892/boris.47745 2021-11-05T12:55:41Z Changes in Greenland accumulation and the stability in the relationship between accumulation variability and large-scale circulation are assessed by performing time-slice simulations for the present day, the preindustrial era, the early Holocene, and the Last Glacial Maximum (LGM) with a comprehensive climate model. The stability issue is an important prerequisite for reconstructions of Northern Hemisphere atmospheric circulation variability based on accumulation or precipitation proxy records from Greenland ice cores. The analysis reveals that the relationship between accumulation variability and large-scale circulation undergoes a significant seasonal cycle. As the contributions of the individual seasons to the annual signal change, annual mean accumulation variability is not necessarily related to the same atmospheric circulation patterns during the different climate states. Interestingly, within a season, local Greenland accumulation variability is indeed linked to a consistent circulation pattern, which is observed for all studied climate periods, even for the LGM. Hence, it would be possible to deduce a reliable reconstruction of seasonal atmospheric variability (e.g., for North Atlantic winters) if an accumulation or precipitation proxy were available that resolves single seasons. We further show that the simulated impacts of orbital forcing and changes in the ice sheet topography on Greenland accumulation exhibit strong spatial differences, emphasizing that accumulation records from different ice core sites regarding both interannual and long-term (centennial to millennial) variability cannot be expected to look alike since they include a distinct local signature. The only uniform signal to external forcing is the strong decrease in Greenland accumulation during glacial (LGM) conditions and an increase associated with the recent rise in greenhouse gas concentrations. Text Greenland Greenland ice cores ice core Ice Sheet North Atlantic DataCite Metadata Store (German National Library of Science and Technology) Greenland |
institution |
Open Polar |
collection |
DataCite Metadata Store (German National Library of Science and Technology) |
op_collection_id |
ftdatacite |
language |
English |
topic |
550 Earth sciences & geology 530 Physics |
spellingShingle |
550 Earth sciences & geology 530 Physics Stocker, Thomas Prange, M. Raible, Christoph Varma, V. Merz, Niklaus Fischer, Hubertus Greenland accumulation and its connection to the large-scale atmospheric circulation in ERA-Interim and paleoclimate simulations |
topic_facet |
550 Earth sciences & geology 530 Physics |
description |
Changes in Greenland accumulation and the stability in the relationship between accumulation variability and large-scale circulation are assessed by performing time-slice simulations for the present day, the preindustrial era, the early Holocene, and the Last Glacial Maximum (LGM) with a comprehensive climate model. The stability issue is an important prerequisite for reconstructions of Northern Hemisphere atmospheric circulation variability based on accumulation or precipitation proxy records from Greenland ice cores. The analysis reveals that the relationship between accumulation variability and large-scale circulation undergoes a significant seasonal cycle. As the contributions of the individual seasons to the annual signal change, annual mean accumulation variability is not necessarily related to the same atmospheric circulation patterns during the different climate states. Interestingly, within a season, local Greenland accumulation variability is indeed linked to a consistent circulation pattern, which is observed for all studied climate periods, even for the LGM. Hence, it would be possible to deduce a reliable reconstruction of seasonal atmospheric variability (e.g., for North Atlantic winters) if an accumulation or precipitation proxy were available that resolves single seasons. We further show that the simulated impacts of orbital forcing and changes in the ice sheet topography on Greenland accumulation exhibit strong spatial differences, emphasizing that accumulation records from different ice core sites regarding both interannual and long-term (centennial to millennial) variability cannot be expected to look alike since they include a distinct local signature. The only uniform signal to external forcing is the strong decrease in Greenland accumulation during glacial (LGM) conditions and an increase associated with the recent rise in greenhouse gas concentrations. |
format |
Text |
author |
Stocker, Thomas Prange, M. Raible, Christoph Varma, V. Merz, Niklaus Fischer, Hubertus |
author_facet |
Stocker, Thomas Prange, M. Raible, Christoph Varma, V. Merz, Niklaus Fischer, Hubertus |
author_sort |
Stocker, Thomas |
title |
Greenland accumulation and its connection to the large-scale atmospheric circulation in ERA-Interim and paleoclimate simulations |
title_short |
Greenland accumulation and its connection to the large-scale atmospheric circulation in ERA-Interim and paleoclimate simulations |
title_full |
Greenland accumulation and its connection to the large-scale atmospheric circulation in ERA-Interim and paleoclimate simulations |
title_fullStr |
Greenland accumulation and its connection to the large-scale atmospheric circulation in ERA-Interim and paleoclimate simulations |
title_full_unstemmed |
Greenland accumulation and its connection to the large-scale atmospheric circulation in ERA-Interim and paleoclimate simulations |
title_sort |
greenland accumulation and its connection to the large-scale atmospheric circulation in era-interim and paleoclimate simulations |
publisher |
Copernicus Publications |
publishDate |
2013 |
url |
https://dx.doi.org/10.7892/boris.47745 http://boris.unibe.ch/47745/ |
geographic |
Greenland |
geographic_facet |
Greenland |
genre |
Greenland Greenland ice cores ice core Ice Sheet North Atlantic |
genre_facet |
Greenland Greenland ice cores ice core Ice Sheet North Atlantic |
op_rights |
info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.7892/boris.47745 |
_version_ |
1766014280049623040 |