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
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-L...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
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Copernicus Publications
2017-05-01
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| Series: | The Cryosphere |
| Online Access: | http://www.the-cryosphere.net/11/1297/2017/tc-11-1297-2017.pdf |
| _version_ | 1819294311284473856 |
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| author | D. Della Lunga D. Della Lunga W. Müller S. O. Rasmussen A. Svensson P. Vallelonga |
| author_facet | D. Della Lunga D. Della Lunga W. Müller S. O. Rasmussen A. Svensson P. Vallelonga |
| author_sort | D. Della Lunga |
| collection | DOAJ |
| description | 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
(2691.50–2688.65 m depth, age interval 84.86–85.09 ka b2k, thus covering
∼ 230 years) across the transitions of GI-21.2, a short-lived
interstadial prior to interstadial GI-21.1. GI-21.2 is a ∼ 100-year
long period with <i>δ</i><sup>18</sup>O values 3–4 ‰ higher than the
following ∼ 200 years of stadial conditions (GS-21.2), which precede
the major GI-21.1 warming. We report concentrations of <q>major</q> 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 10-fold) 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. |
| first_indexed | 2024-12-24T04:24:18Z |
| format | Article |
| id | doaj.art-c6095aea584e43e99c0a58878b8ddf73 |
| institution | Directory Open Access Journal |
| issn | 1994-0416 1994-0424 |
| language | English |
| last_indexed | 2024-12-24T04:24:18Z |
| publishDate | 2017-05-01 |
| publisher | Copernicus Publications |
| record_format | Article |
| series | The Cryosphere |
| spelling | doaj.art-c6095aea584e43e99c0a58878b8ddf732022-12-21T17:15:41ZengCopernicus PublicationsThe Cryosphere1994-04161994-04242017-05-01111297130910.5194/tc-11-1297-2017Calibrated 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 periodD. Della Lunga0D. Della Lunga1W. Müller2S. O. Rasmussen3A. Svensson4P. Vallelonga5Royal Holloway University of London, Egham TW20 0EX, UKAlfred Wegener Instiutute for Polar and Marine Research, 27570 Bremerhaven, GermanyRoyal Holloway University of London, Egham TW20 0EX, UKCentre for Ice and Climate, Niels Bohr Institute, University of Copenhagen, 2100 Copenhagen Ø, DenmarkCentre for Ice and Climate, Niels Bohr Institute, University of Copenhagen, 2100 Copenhagen Ø, DenmarkCentre for Ice and Climate, Niels Bohr Institute, University of Copenhagen, 2100 Copenhagen Ø, DenmarkSeveral 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 (2691.50–2688.65 m depth, age interval 84.86–85.09 ka b2k, thus covering ∼ 230 years) across the transitions of GI-21.2, a short-lived interstadial prior to interstadial GI-21.1. GI-21.2 is a ∼ 100-year long period with <i>δ</i><sup>18</sup>O values 3–4 ‰ higher than the following ∼ 200 years of stadial conditions (GS-21.2), which precede the major GI-21.1 warming. We report concentrations of <q>major</q> 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 10-fold) 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.http://www.the-cryosphere.net/11/1297/2017/tc-11-1297-2017.pdf |
| spellingShingle | D. Della Lunga D. Della Lunga W. Müller S. O. Rasmussen A. Svensson P. Vallelonga 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 |
| title | 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 |
| title_full | 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 |
| title_fullStr | 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 |
| title_full_unstemmed | 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 |
| title_short | 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 |
| title_sort | 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 |
| url | http://www.the-cryosphere.net/11/1297/2017/tc-11-1297-2017.pdf |
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