Della Lunga, Damiano; Müller, Wolfgang; Rasmussen, Sune Olander; Svensson, Anders M; Vallelonga, Paul T (2017): Major elemental concentrations from NGRIP ice core across the interstadial period GI-21.2 [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.875711, Supplement to: Della Lunga, D et al. (2017): Calibrated cryo-cell UV-LA-ICPMS elemental concentrations from the NGRIP ice core reveal abrupt, sub-annual variability in dust across the GI-21.2 interstadial period. The Cryosphere, 11(3), 1297-1309, https://doi.org/10.5194/tc-11-1297-2017
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Abstract:
Several abrupt shifts from periods of extreme cold (Greenland stadials, GS) to relatively warmer conditions (Greenland interstadials, GI) called Dansgaard-Oeschger events are recorded in the Greenland ice cores. Using cryo-cell UV-laser-ablation inductively-coupled-plasma mass spectrometry (UV-LA-ICPMS), we analysed a 2.85 m NGRIP ice core section (~ 250 years; 2691.50–2688.65 m depth) across the transitions of GI-21.2, a short-lived interstadial prior to interstadial GI-21.1 (GI-21.2: 84.87–85.09 ka b2k). GI-21.2 is a ~100-year-long period with d18O values 3–4 per mil higher than the following ~200 years of stadial conditions (GS-21.2), which precede the major GI-21.1 warming. We report concentrations of "major" elements indicative of dust and/or sea salt (Na, Fe, Al, Ca, Mg) at a spatial resolution of ~ 200 µm, while maintaining detection limits in the low-ppb range, thereby achieving sub-annual time resolution even in deep NGRIP ice. We present an improved external calibration and quantification procedure using a set of five ice standards made from aqueous (international) standard solutions. Our results show that element concentrations decrease drastically (more than tenfold) at the warming onset of GI-21.2 at the scale of a single year, followed by relatively low concentrations characterizing the interstadial part before gradually reaching again typical stadial values.
Project(s):
North Greenland Ice Core Project (NGRIP)
Coverage:
Latitude: 75.100000 * Longitude: -42.320000
Date/Time Start: 1996-07-01T00:00:00 * Date/Time End: 1996-07-01T00:00:00
Minimum DEPTH, ice/snow: 2688.650025 m * Maximum DEPTH, ice/snow: 2691.499975 m
Event(s):
NGRIP (NorthGRIP) * Latitude: 75.100000 * Longitude: -42.320000 * Date/Time: 1996-07-01T00:00:00 * Elevation: 2917.0 m * Location: Greenland * Campaign: NGRIP * Basis: Sampling/drilling ice * Method/Device: Ice drill (ICEDRILL)
Parameter(s):
| # | Name | Short Name | Unit | Principal Investigator | Method/Device | Comment |
|---|---|---|---|---|---|---|
| 1 | DEPTH, ice/snow | Depth ice/snow | m | Della Lunga, Damiano | Geocode | |
| 2 | Sodium | Na+ | ng/g | Della Lunga, Damiano | Cryo-cell UV-laser-ablation inductively-coupled-plasma mass spectrometry | |
| 3 | Calcium | Ca2+ | ng/g | Della Lunga, Damiano | Cryo-cell UV-laser-ablation inductively-coupled-plasma mass spectrometry | |
| 4 | Magnesium | Mg | ng/g | Della Lunga, Damiano | Cryo-cell UV-laser-ablation inductively-coupled-plasma mass spectrometry | |
| 5 | Aluminium | Al3+ | µg/kg | Della Lunga, Damiano | Cryo-cell UV-laser-ablation inductively-coupled-plasma mass spectrometry | |
| 6 | Iron | Fe | µg/kg | Della Lunga, Damiano | Cryo-cell UV-laser-ablation inductively-coupled-plasma mass spectrometry |
License:
Creative Commons Attribution 3.0 Unported (CC-BY-3.0)
Size:
329557 data points
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