Air content along the Greenland Ice Core Project core: A record of surface climatic parameters and elevation in central Greenland
We present here measurements of the air content of the ice, V, performed along the Greenland Ice Core Project (GRIP) ice core. The main features of the long-term trends are (1) a decrease of 13% between the last glacial maximum (LGM) and the earliest part of the Holocene, and (2) an increase of 8% d...
Published in: | Journal of Geophysical Research: Oceans |
---|---|
Main Authors: | , , , |
Format: | Text |
Language: | unknown |
Published: |
Washington, American Geophysical Union (AGU)
2022
|
Subjects: | |
Online Access: | https://doi.org/10.1029/97JC01908 http://infoscience.epfl.ch/record/298270 |
id |
ftinfoscience:oai:infoscience.epfl.ch:298270 |
---|---|
record_format |
openpolar |
spelling |
ftinfoscience:oai:infoscience.epfl.ch:298270 2023-05-15T16:26:28+02:00 Air content along the Greenland Ice Core Project core: A record of surface climatic parameters and elevation in central Greenland Raynaud, D. Chappellaz, J. Ritz, C. Martinerie, P. 2022-11-23T16:11:00Z https://doi.org/10.1029/97JC01908 http://infoscience.epfl.ch/record/298270 unknown Washington, American Geophysical Union (AGU) doi:10.1029/97JC01908 isi:A1997YJ67100025 http://infoscience.epfl.ch/record/298270 http://infoscience.epfl.ch/record/298270 Text 2022 ftinfoscience https://doi.org/10.1029/97JC01908 2023-02-13T23:12:29Z We present here measurements of the air content of the ice, V, performed along the Greenland Ice Core Project (GRIP) ice core. The main features of the long-term trends are (1) a decrease of 13% between the last glacial maximum (LGM) and the earliest part of the Holocene, and (2) an increase of 8% during the Holocene. The resultsare discussed in terms of changes in atmospheric pressure, surface elevation and porosityat close-off. The V record contains a significant signal of past changes of surface elevation in qualitative agreement with ice sheet modeling simulations. It suggests a thickening of central Greenland during the transition from the LGM to the early Holocene, and a significant thinning through the Holocene period. It also stresses the large influence on past V variations of changes in ice porosity, which are not explained by the present-day spatial relationship with temperature and may reflect changes in other surface climatic parameters (like precipitation seasonality or wind stress). The potential role of temporalvariations of atmospheric pressure patterns is also evaluated. Air content results in the GRIP ice older than 110 ka indicate values approximately in the same range as those observed during the last 40,000 years, with generally higher air content corresponding to isotopically warmer ice. © Copyright 1997 by the American Geophysical Union. Text Greenland Greenland ice core Greenland Ice core Project GRIP ice core Ice Sheet EPFL Infoscience (Ecole Polytechnique Fédérale Lausanne) Greenland Journal of Geophysical Research: Oceans 102 C12 26607 26613 |
institution |
Open Polar |
collection |
EPFL Infoscience (Ecole Polytechnique Fédérale Lausanne) |
op_collection_id |
ftinfoscience |
language |
unknown |
description |
We present here measurements of the air content of the ice, V, performed along the Greenland Ice Core Project (GRIP) ice core. The main features of the long-term trends are (1) a decrease of 13% between the last glacial maximum (LGM) and the earliest part of the Holocene, and (2) an increase of 8% during the Holocene. The resultsare discussed in terms of changes in atmospheric pressure, surface elevation and porosityat close-off. The V record contains a significant signal of past changes of surface elevation in qualitative agreement with ice sheet modeling simulations. It suggests a thickening of central Greenland during the transition from the LGM to the early Holocene, and a significant thinning through the Holocene period. It also stresses the large influence on past V variations of changes in ice porosity, which are not explained by the present-day spatial relationship with temperature and may reflect changes in other surface climatic parameters (like precipitation seasonality or wind stress). The potential role of temporalvariations of atmospheric pressure patterns is also evaluated. Air content results in the GRIP ice older than 110 ka indicate values approximately in the same range as those observed during the last 40,000 years, with generally higher air content corresponding to isotopically warmer ice. © Copyright 1997 by the American Geophysical Union. |
format |
Text |
author |
Raynaud, D. Chappellaz, J. Ritz, C. Martinerie, P. |
spellingShingle |
Raynaud, D. Chappellaz, J. Ritz, C. Martinerie, P. Air content along the Greenland Ice Core Project core: A record of surface climatic parameters and elevation in central Greenland |
author_facet |
Raynaud, D. Chappellaz, J. Ritz, C. Martinerie, P. |
author_sort |
Raynaud, D. |
title |
Air content along the Greenland Ice Core Project core: A record of surface climatic parameters and elevation in central Greenland |
title_short |
Air content along the Greenland Ice Core Project core: A record of surface climatic parameters and elevation in central Greenland |
title_full |
Air content along the Greenland Ice Core Project core: A record of surface climatic parameters and elevation in central Greenland |
title_fullStr |
Air content along the Greenland Ice Core Project core: A record of surface climatic parameters and elevation in central Greenland |
title_full_unstemmed |
Air content along the Greenland Ice Core Project core: A record of surface climatic parameters and elevation in central Greenland |
title_sort |
air content along the greenland ice core project core: a record of surface climatic parameters and elevation in central greenland |
publisher |
Washington, American Geophysical Union (AGU) |
publishDate |
2022 |
url |
https://doi.org/10.1029/97JC01908 http://infoscience.epfl.ch/record/298270 |
geographic |
Greenland |
geographic_facet |
Greenland |
genre |
Greenland Greenland ice core Greenland Ice core Project GRIP ice core Ice Sheet |
genre_facet |
Greenland Greenland ice core Greenland Ice core Project GRIP ice core Ice Sheet |
op_source |
http://infoscience.epfl.ch/record/298270 |
op_relation |
doi:10.1029/97JC01908 isi:A1997YJ67100025 http://infoscience.epfl.ch/record/298270 |
op_doi |
https://doi.org/10.1029/97JC01908 |
container_title |
Journal of Geophysical Research: Oceans |
container_volume |
102 |
container_issue |
C12 |
container_start_page |
26607 |
op_container_end_page |
26613 |
_version_ |
1766015384156110848 |