Total air content in the NGRIP and isotopic signatures of N2O in the Talos Dome ice core ...
This thesis contains two thematic key aspects. The main focus is total air content (TAC) in the North Greenland Ice Core Project (NGRIP) ice core. We present the first TAC record over an entire Greenland ice core, consisting of 1688 datapoints in total. The TAC record shows a local insolation signat...
Main Author: | |
---|---|
Format: | Thesis |
Language: | unknown |
Published: |
:unas
2016
|
Subjects: | |
Online Access: | https://dx.doi.org/10.48350/192572 https://boris.unibe.ch/192572/ |
id |
ftdatacite:10.48350/192572 |
---|---|
record_format |
openpolar |
spelling |
ftdatacite:10.48350/192572 2024-03-31T07:49:22+00:00 Total air content in the NGRIP and isotopic signatures of N2O in the Talos Dome ice core ... Eicher, Olivier 2016 https://dx.doi.org/10.48350/192572 https://boris.unibe.ch/192572/ unknown :unas restricted access boris standard license http://purl.org/coar/access_right/c_16ec 530 Physics Text thesis article-journal ScholarlyArticle 2016 ftdatacite https://doi.org/10.48350/192572 2024-03-04T13:59:02Z This thesis contains two thematic key aspects. The main focus is total air content (TAC) in the North Greenland Ice Core Project (NGRIP) ice core. We present the first TAC record over an entire Greenland ice core, consisting of 1688 datapoints in total. The TAC record shows a local insolation signature, an effect known for Antarctic TAC records, now independently confirmed for Greenland by our study. We are also the first showing direct imprint of fast warmings, the Dansgaard-Oeschger (DO) events, in TAC. This TAC response is larger than expected considering only changes in air density by local temperature and atmospheric pressure changes as a driver, pointing to a transient firnification response in pore volume. We hypothesize that the transient firnification response is caused by the accumulation-induced increase in the load on the firn at bubble close-off, while at close-off temperature changes are still small. Using a firn model, we provide an upper limit of this effect. Our results contribute to the ... Thesis Antarc* Antarctic Greenland Greenland ice core Greenland Ice core Project ice core NGRIP North Greenland North Greenland Ice Core Project DataCite Metadata Store (German National Library of Science and Technology) Antarctic Greenland Tac ENVELOPE(-59.517,-59.517,-62.500,-62.500) Talos Dome ENVELOPE(158.000,158.000,-73.000,-73.000) |
institution |
Open Polar |
collection |
DataCite Metadata Store (German National Library of Science and Technology) |
op_collection_id |
ftdatacite |
language |
unknown |
topic |
530 Physics |
spellingShingle |
530 Physics Eicher, Olivier Total air content in the NGRIP and isotopic signatures of N2O in the Talos Dome ice core ... |
topic_facet |
530 Physics |
description |
This thesis contains two thematic key aspects. The main focus is total air content (TAC) in the North Greenland Ice Core Project (NGRIP) ice core. We present the first TAC record over an entire Greenland ice core, consisting of 1688 datapoints in total. The TAC record shows a local insolation signature, an effect known for Antarctic TAC records, now independently confirmed for Greenland by our study. We are also the first showing direct imprint of fast warmings, the Dansgaard-Oeschger (DO) events, in TAC. This TAC response is larger than expected considering only changes in air density by local temperature and atmospheric pressure changes as a driver, pointing to a transient firnification response in pore volume. We hypothesize that the transient firnification response is caused by the accumulation-induced increase in the load on the firn at bubble close-off, while at close-off temperature changes are still small. Using a firn model, we provide an upper limit of this effect. Our results contribute to the ... |
format |
Thesis |
author |
Eicher, Olivier |
author_facet |
Eicher, Olivier |
author_sort |
Eicher, Olivier |
title |
Total air content in the NGRIP and isotopic signatures of N2O in the Talos Dome ice core ... |
title_short |
Total air content in the NGRIP and isotopic signatures of N2O in the Talos Dome ice core ... |
title_full |
Total air content in the NGRIP and isotopic signatures of N2O in the Talos Dome ice core ... |
title_fullStr |
Total air content in the NGRIP and isotopic signatures of N2O in the Talos Dome ice core ... |
title_full_unstemmed |
Total air content in the NGRIP and isotopic signatures of N2O in the Talos Dome ice core ... |
title_sort |
total air content in the ngrip and isotopic signatures of n2o in the talos dome ice core ... |
publisher |
:unas |
publishDate |
2016 |
url |
https://dx.doi.org/10.48350/192572 https://boris.unibe.ch/192572/ |
long_lat |
ENVELOPE(-59.517,-59.517,-62.500,-62.500) ENVELOPE(158.000,158.000,-73.000,-73.000) |
geographic |
Antarctic Greenland Tac Talos Dome |
geographic_facet |
Antarctic Greenland Tac Talos Dome |
genre |
Antarc* Antarctic Greenland Greenland ice core Greenland Ice core Project ice core NGRIP North Greenland North Greenland Ice Core Project |
genre_facet |
Antarc* Antarctic Greenland Greenland ice core Greenland Ice core Project ice core NGRIP North Greenland North Greenland Ice Core Project |
op_rights |
restricted access boris standard license http://purl.org/coar/access_right/c_16ec |
op_doi |
https://doi.org/10.48350/192572 |
_version_ |
1795038606829551616 |