Kjær, Helle Astrid; Zens, Patrick; Black, Samuel; Lund, Kasper Holst; Svensson, Anders M; Vallelonga, Paul T (2023): Insoluble dust, ammonium, calcium, conductivity, peroxide and acid measured in firn cores in Northern Greenland in 2015: T2015-A2 [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.957618, In: Kjær, HA et al. (2023): Insoluble dust, ammonium, calcium, conductivity, peroxide and acid measured in firn cores in Northern Greenland in 2015 [dataset bundled publication]. PANGAEA, https://doi.org/10.1594/PANGAEA.952936
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Abstract:
Results from six firn cores obtained during a 426 km long northern Greenland traverse in 2015 between the NEEM and the EGRIP deep drilling stations situated on the Western and Eastern side of the Greenland ice sheet, respectively. The cores (9 to 14 m long) are analysed for chemical impurities by means of Continuous Flow Analysis (CFA); Insoluble dust, ammonium, calcium, acid, conductivity and peroxide. The data was dated by means of annual layer counting of mainly peroxide supplemented by calcium seasonal cycles and spans 18 to 53 years (±3 yrs) depending on local snow accumulation that decreases from west to east. Insoluble dust, ammonium, and calcium concentrations in the 6 firn cores overlap, and also the seasonal cycles are similar in timing and magnitude across sites, while peroxide (H2O2) and conductivity both have spatial variations. H2O2 is driven by the accumulation pattern and conductivity is likely influenced by sea salt. Data is published as part of Kjær et al. 2022, Climate of the past, https://doi.org/10.5194/cp-2021-99
Keyword(s):
Related to:
Kjær, Helle Astrid; Zens, Patrick; Black, Samuel; Lund, Kasper Holst; Svensson, Anders M; Vallelonga, Paul T (2022): Canadian forest fires, Icelandic volcanoes and increased local dust observed in six shallow Greenland firn cores. Climate of the Past, 18(10), 2211-2230, https://doi.org/10.5194/cp-2021-99
Documentation:
Bigler, Matthias; Svensson, Anders M; Kettner, E; Vallelonga, Paul T; Nielsen, Maibritt; Steffensen, Jørgen Peder (2011): Optimization of High-Resolution Continuous Flow Analysis for Transient Climate Signals in Ice Cores. Environmental Science & Technology, 45(10), 4483-4489, https://doi.org/10.1021/es200118j
Project(s):
Funding:
Agence Nationale de la Recherche (ANR), grant/award no. 07-VULN-09-001: North Greenland Eemian Ice Drilling
European Research Council (ERC), grant/award no. 610055: Arctic Sea Ice and Greenland Ice Sheet Sensitivity
Coverage:
Latitude: 77.017640 * Longitude: -47.288320
Date/Time Start: 2015-05-20T00:00:00 * Date/Time End: 2015-05-20T00:00:00
Minimum DEPTH, ice/snow: 0.000 m * Maximum DEPTH, ice/snow: 10.747 m
Event(s):
Parameter(s):
| # | Name | Short Name | Unit | Principal Investigator | Method/Device | Comment |
|---|---|---|---|---|---|---|
| 1 | DEPTH, ice/snow | Depth ice/snow | m | Kjær, Helle Astrid | Continuous flow analysis according to Bigler (2011) | Geocode |
| 2 | AGE | Age | ka BP | Kjær, Helle Astrid | Annual layer counting | Geocode |
| 3 | Age | Age | a AD/CE | Kjær, Helle Astrid | Annual layer counting | agescale based primarily on summer max of H2O2 and calcium seasonal cycles |
| 4 | Hydrogen peroxide | H2O2 | arbitrary units | Kjær, Helle Astrid | Fluorometer, FIAlab Instruments, PMT-FL | ppm, as described in Bigler et al, 2011 |
| 5 | Conductivity, electrical | Cond electr | µS/cm | Kjær, Helle Astrid | Conductivity Meter, Amber Science, 3082 [with micro flow cell 829] | |
| 6 | Dust | Dust | #/ml | Kjær, Helle Astrid | Laser particle counter, Klotz, Abakus [LDS 23/25bs sensor] | Insoluble dust (counts > 1µm/ml) as described in Bigler et al, 2011 |
| 7 | Calcium | Ca2+ | µg/l | Kjær, Helle Astrid | Fluorometer, FIAlab Instruments, PMT-FL | ppb, as described in Bigler et al, 2011 |
| 8 | Ammonium | [NH4]+ | µg/l | Kjær, Helle Astrid | Fluorometer, FIAlab Instruments, PMT-FL | ppb, as described in Bigler et al, 2011 |
| 9 | Hydrogen ion + indicator | [H+] +ind | µmol/l | Kjær, Helle Astrid | Optical dye according to Kjær et al. (2016) | Hydrogen ion + dye |
License:
Creative Commons Attribution 4.0 International (CC-BY-4.0)
Status:
Curation Level: Enhanced curation (CurationLevelC)
Size:
76986 data points
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