Representativeness and seasonality of major ion records derived from NEEM firn cores
The seasonal and annual representativeness of ionic aerosol proxies (among others, calcium, sodium, ammonium and nitrate) in various firn cores in the vicinity of the NEEM drill site in northwest Greenland have been assessed. Seasonal representativeness is very high as one core explains more than 60...
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ftunivbern:oai:boris.unibe.ch:61213 2023-08-20T04:06:57+02:00 Representativeness and seasonality of major ion records derived from NEEM firn cores Gfeller, Gideon Fischer, Hubertus Bigler, Matthias Schüpbach, Simon Leuenberger, Daiana Mini, Olivia 2014 application/pdf https://boris.unibe.ch/61213/1/tc-8-1855-2014.pdf https://boris.unibe.ch/61213/ eng eng Copernicus https://boris.unibe.ch/61213/ info:eu-repo/semantics/openAccess Gfeller, Gideon; Fischer, Hubertus; Bigler, Matthias; Schüpbach, Simon; Leuenberger, Daiana; Mini, Olivia (2014). Representativeness and seasonality of major ion records derived from NEEM firn cores. The Cryosphere, 8(5), pp. 1855-1870. Copernicus 10.5194/tc-8-1855-2014 <http://dx.doi.org/10.5194/tc-8-1855-2014> 530 Physics info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion PeerReviewed 2014 ftunivbern https://doi.org/10.5194/tc-8-1855-2014 2023-07-31T21:12:52Z The seasonal and annual representativeness of ionic aerosol proxies (among others, calcium, sodium, ammonium and nitrate) in various firn cores in the vicinity of the NEEM drill site in northwest Greenland have been assessed. Seasonal representativeness is very high as one core explains more than 60 % of the variability within the area. The inter-annual representativeness, however, can be substantially lower (depending on the species) making replicate coring indispensable to derive the atmospheric variability of aerosol species. A single core at the NEEM site records only 30 % of the inter-annual atmospheric variability in some species, while five replicate cores are already needed to cover approximately 70 % of the inter-annual atmospheric variability in all species. The spatial representativeness is very high within 60 cm, rapidly decorrelates within 10 m but does not diminish further within 3 km. We attribute this to wind reworking of the snow pack leading to sastrugi formation. Due to the high resolution and seasonal representativeness of the records we can derive accurate seasonalities of the measured species for modern (AD 1990–2010) times as well as for pre-industrial (AD 1623–1750) times. Sodium and calcium show similar seasonality (peaking in February and March respectively) for modern and pre-industrial times, whereas ammonium and nitrate are influenced by anthro pogenic activities. Nitrate and ammonium both peak in May during modern times, whereas during pre-industrial times ammonium peaked during July–August and nitrate during June–July. Article in Journal/Newspaper Greenland The Cryosphere BORIS (Bern Open Repository and Information System, University of Bern) Greenland Sastrugi ENVELOPE(163.683,163.683,-74.617,-74.617) The Cryosphere 8 5 1855 1870 |
institution |
Open Polar |
collection |
BORIS (Bern Open Repository and Information System, University of Bern) |
op_collection_id |
ftunivbern |
language |
English |
topic |
530 Physics |
spellingShingle |
530 Physics Gfeller, Gideon Fischer, Hubertus Bigler, Matthias Schüpbach, Simon Leuenberger, Daiana Mini, Olivia Representativeness and seasonality of major ion records derived from NEEM firn cores |
topic_facet |
530 Physics |
description |
The seasonal and annual representativeness of ionic aerosol proxies (among others, calcium, sodium, ammonium and nitrate) in various firn cores in the vicinity of the NEEM drill site in northwest Greenland have been assessed. Seasonal representativeness is very high as one core explains more than 60 % of the variability within the area. The inter-annual representativeness, however, can be substantially lower (depending on the species) making replicate coring indispensable to derive the atmospheric variability of aerosol species. A single core at the NEEM site records only 30 % of the inter-annual atmospheric variability in some species, while five replicate cores are already needed to cover approximately 70 % of the inter-annual atmospheric variability in all species. The spatial representativeness is very high within 60 cm, rapidly decorrelates within 10 m but does not diminish further within 3 km. We attribute this to wind reworking of the snow pack leading to sastrugi formation. Due to the high resolution and seasonal representativeness of the records we can derive accurate seasonalities of the measured species for modern (AD 1990–2010) times as well as for pre-industrial (AD 1623–1750) times. Sodium and calcium show similar seasonality (peaking in February and March respectively) for modern and pre-industrial times, whereas ammonium and nitrate are influenced by anthro pogenic activities. Nitrate and ammonium both peak in May during modern times, whereas during pre-industrial times ammonium peaked during July–August and nitrate during June–July. |
format |
Article in Journal/Newspaper |
author |
Gfeller, Gideon Fischer, Hubertus Bigler, Matthias Schüpbach, Simon Leuenberger, Daiana Mini, Olivia |
author_facet |
Gfeller, Gideon Fischer, Hubertus Bigler, Matthias Schüpbach, Simon Leuenberger, Daiana Mini, Olivia |
author_sort |
Gfeller, Gideon |
title |
Representativeness and seasonality of major ion records derived from NEEM firn cores |
title_short |
Representativeness and seasonality of major ion records derived from NEEM firn cores |
title_full |
Representativeness and seasonality of major ion records derived from NEEM firn cores |
title_fullStr |
Representativeness and seasonality of major ion records derived from NEEM firn cores |
title_full_unstemmed |
Representativeness and seasonality of major ion records derived from NEEM firn cores |
title_sort |
representativeness and seasonality of major ion records derived from neem firn cores |
publisher |
Copernicus |
publishDate |
2014 |
url |
https://boris.unibe.ch/61213/1/tc-8-1855-2014.pdf https://boris.unibe.ch/61213/ |
long_lat |
ENVELOPE(163.683,163.683,-74.617,-74.617) |
geographic |
Greenland Sastrugi |
geographic_facet |
Greenland Sastrugi |
genre |
Greenland The Cryosphere |
genre_facet |
Greenland The Cryosphere |
op_source |
Gfeller, Gideon; Fischer, Hubertus; Bigler, Matthias; Schüpbach, Simon; Leuenberger, Daiana; Mini, Olivia (2014). Representativeness and seasonality of major ion records derived from NEEM firn cores. The Cryosphere, 8(5), pp. 1855-1870. Copernicus 10.5194/tc-8-1855-2014 <http://dx.doi.org/10.5194/tc-8-1855-2014> |
op_relation |
https://boris.unibe.ch/61213/ |
op_rights |
info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.5194/tc-8-1855-2014 |
container_title |
The Cryosphere |
container_volume |
8 |
container_issue |
5 |
container_start_page |
1855 |
op_container_end_page |
1870 |
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1774718325539995648 |