Mean snow accumulation rate, and mean methane sulfonate, chloride and nitrate concentration in snow pits and firn cores of Dronning Maud Land
We quantified postdepositional losses of methane sulfonate (MSA-), nitrate, and chloride at the European Project for Ice Coring in Antarctica (EPICA) drilling site in Dronning Maud Land (DML) (75°S, 0°E). Analyses of four intermediate deep firn cores and 13 snow pits were considered. We found that a...
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ftpangaea:oai:pangaea.de:doi:10.1594/PANGAEA.855383 2024-09-15T17:47:28+00:00 Mean snow accumulation rate, and mean methane sulfonate, chloride and nitrate concentration in snow pits and firn cores of Dronning Maud Land Weller, Rolf Traufetter, Fidan Fischer, H Oerter, Hans Piel, Claudia Miller, Heinz MEDIAN LATITUDE: -75.135662 * MEDIAN LONGITUDE: 0.275660 * SOUTH-BOUND LATITUDE: -75.581500 * WEST-BOUND LONGITUDE: -6.498267 * NORTH-BOUND LATITUDE: -74.499167 * EAST-BOUND LONGITUDE: 6.498500 * DATE/TIME START: 1997-12-17T00:00:00 * DATE/TIME END: 2000-01-30T00:00:00 2004 application/zip, 2 datasets https://doi.pangaea.de/10.1594/PANGAEA.855383 https://doi.org/10.1594/PANGAEA.855383 en eng PANGAEA https://doi.pangaea.de/10.1594/PANGAEA.855383 https://doi.org/10.1594/PANGAEA.855383 CC-BY-3.0: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess Supplement to: Weller, Rolf; Traufetter, Fidan; Fischer, H; Oerter, Hans; Piel, Claudia; Miller, Heinz (2004): Postdepositional losses of methane sulfonate, nitrate, and chloride at the European Project for Ice Coring in Antarctica deep-drilling site in Dronning Maud Land, Antarctica. Journal of Geophysical Research, 109(D7), https://doi.org/10.1029/2003JD004189 Atmospheric Chemistry @ AWI AWI_AC EPICA European Project for Ice Coring in Antarctica Priority Programme 1158 Antarctic Research with Comparable Investigations in Arctic Sea Ice Areas SPP1158 dataset publication series 2004 ftpangaea https://doi.org/10.1594/PANGAEA.85538310.1029/2003JD004189 2024-07-24T02:31:21Z We quantified postdepositional losses of methane sulfonate (MSA-), nitrate, and chloride at the European Project for Ice Coring in Antarctica (EPICA) drilling site in Dronning Maud Land (DML) (75°S, 0°E). Analyses of four intermediate deep firn cores and 13 snow pits were considered. We found that about 26 ± 13% of the once deposited nitrate and typically 51 ± 20% of MSA- were lost, while for chloride, no significant depletion could be observed in firn older than one year. Assuming a first order exponential decay rate, the characteristic e-folding time for MSA- is 6.4 ± 3 years and 19 ± 6 years for nitrate. It turns out that for nitrate and MSA- the typical mean concentrations representative for the last 100 years were reached after 5.4 and 6.5 years, respectively, indicating that beneath a depth of around 1.2-1.4 m postdepositional losses can be neglected. In the area of investigation, only MSA- concentrations and postdepositional losses showed a distinct dependence on snow accumulation rate. Consequently, MSA- concentrations archived at this site should be significantly dependent on the variability of annual snow accumulation, and we recommend a corresponding correction. With a simple approach, we estimated the partial pressure of the free acids MSA, HNO3, and HCl on the basis of Henry's law assuming that ionic impurities of the bulk ice matrix are localized in a quasi-brine layer (QBL). In contrast to measurements, this approach predicts a nearly complete loss of MSA-, NO3 - , and Cl-. Other/Unknown Material Antarc* Antarctic Antarctica Antarctica Journal DML Dronning Maud Land EPICA Sea ice PANGAEA - Data Publisher for Earth & Environmental Science ENVELOPE(-6.498267,6.498500,-74.499167,-75.581500) |
institution |
Open Polar |
collection |
PANGAEA - Data Publisher for Earth & Environmental Science |
op_collection_id |
ftpangaea |
language |
English |
topic |
Atmospheric Chemistry @ AWI AWI_AC EPICA European Project for Ice Coring in Antarctica Priority Programme 1158 Antarctic Research with Comparable Investigations in Arctic Sea Ice Areas SPP1158 |
spellingShingle |
Atmospheric Chemistry @ AWI AWI_AC EPICA European Project for Ice Coring in Antarctica Priority Programme 1158 Antarctic Research with Comparable Investigations in Arctic Sea Ice Areas SPP1158 Weller, Rolf Traufetter, Fidan Fischer, H Oerter, Hans Piel, Claudia Miller, Heinz Mean snow accumulation rate, and mean methane sulfonate, chloride and nitrate concentration in snow pits and firn cores of Dronning Maud Land |
topic_facet |
Atmospheric Chemistry @ AWI AWI_AC EPICA European Project for Ice Coring in Antarctica Priority Programme 1158 Antarctic Research with Comparable Investigations in Arctic Sea Ice Areas SPP1158 |
description |
We quantified postdepositional losses of methane sulfonate (MSA-), nitrate, and chloride at the European Project for Ice Coring in Antarctica (EPICA) drilling site in Dronning Maud Land (DML) (75°S, 0°E). Analyses of four intermediate deep firn cores and 13 snow pits were considered. We found that about 26 ± 13% of the once deposited nitrate and typically 51 ± 20% of MSA- were lost, while for chloride, no significant depletion could be observed in firn older than one year. Assuming a first order exponential decay rate, the characteristic e-folding time for MSA- is 6.4 ± 3 years and 19 ± 6 years for nitrate. It turns out that for nitrate and MSA- the typical mean concentrations representative for the last 100 years were reached after 5.4 and 6.5 years, respectively, indicating that beneath a depth of around 1.2-1.4 m postdepositional losses can be neglected. In the area of investigation, only MSA- concentrations and postdepositional losses showed a distinct dependence on snow accumulation rate. Consequently, MSA- concentrations archived at this site should be significantly dependent on the variability of annual snow accumulation, and we recommend a corresponding correction. With a simple approach, we estimated the partial pressure of the free acids MSA, HNO3, and HCl on the basis of Henry's law assuming that ionic impurities of the bulk ice matrix are localized in a quasi-brine layer (QBL). In contrast to measurements, this approach predicts a nearly complete loss of MSA-, NO3 - , and Cl-. |
format |
Other/Unknown Material |
author |
Weller, Rolf Traufetter, Fidan Fischer, H Oerter, Hans Piel, Claudia Miller, Heinz |
author_facet |
Weller, Rolf Traufetter, Fidan Fischer, H Oerter, Hans Piel, Claudia Miller, Heinz |
author_sort |
Weller, Rolf |
title |
Mean snow accumulation rate, and mean methane sulfonate, chloride and nitrate concentration in snow pits and firn cores of Dronning Maud Land |
title_short |
Mean snow accumulation rate, and mean methane sulfonate, chloride and nitrate concentration in snow pits and firn cores of Dronning Maud Land |
title_full |
Mean snow accumulation rate, and mean methane sulfonate, chloride and nitrate concentration in snow pits and firn cores of Dronning Maud Land |
title_fullStr |
Mean snow accumulation rate, and mean methane sulfonate, chloride and nitrate concentration in snow pits and firn cores of Dronning Maud Land |
title_full_unstemmed |
Mean snow accumulation rate, and mean methane sulfonate, chloride and nitrate concentration in snow pits and firn cores of Dronning Maud Land |
title_sort |
mean snow accumulation rate, and mean methane sulfonate, chloride and nitrate concentration in snow pits and firn cores of dronning maud land |
publisher |
PANGAEA |
publishDate |
2004 |
url |
https://doi.pangaea.de/10.1594/PANGAEA.855383 https://doi.org/10.1594/PANGAEA.855383 |
op_coverage |
MEDIAN LATITUDE: -75.135662 * MEDIAN LONGITUDE: 0.275660 * SOUTH-BOUND LATITUDE: -75.581500 * WEST-BOUND LONGITUDE: -6.498267 * NORTH-BOUND LATITUDE: -74.499167 * EAST-BOUND LONGITUDE: 6.498500 * DATE/TIME START: 1997-12-17T00:00:00 * DATE/TIME END: 2000-01-30T00:00:00 |
long_lat |
ENVELOPE(-6.498267,6.498500,-74.499167,-75.581500) |
genre |
Antarc* Antarctic Antarctica Antarctica Journal DML Dronning Maud Land EPICA Sea ice |
genre_facet |
Antarc* Antarctic Antarctica Antarctica Journal DML Dronning Maud Land EPICA Sea ice |
op_source |
Supplement to: Weller, Rolf; Traufetter, Fidan; Fischer, H; Oerter, Hans; Piel, Claudia; Miller, Heinz (2004): Postdepositional losses of methane sulfonate, nitrate, and chloride at the European Project for Ice Coring in Antarctica deep-drilling site in Dronning Maud Land, Antarctica. Journal of Geophysical Research, 109(D7), https://doi.org/10.1029/2003JD004189 |
op_relation |
https://doi.pangaea.de/10.1594/PANGAEA.855383 https://doi.org/10.1594/PANGAEA.855383 |
op_rights |
CC-BY-3.0: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.1594/PANGAEA.85538310.1029/2003JD004189 |
_version_ |
1810496836928012288 |