Match points used for synchronization of NGRIP, GRIP, and GISP2
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| Natura: | Dataset Open Access |
| Lingua: | en |
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PANGAEA
2012
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| _version_ | 1867171781340561408 |
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| author | Rasmussen, Sune Olander Andersen, Katrine K Svensson, Anders M Steffensen, Jørgen Peder Vinther, Bo Møllesøe Clausen, Henrik Brink Siggaard-Andersen, Marie-Louise Johnsen, Sigfús Jóhann Larsen, L B Dahl-Jensen, Dorthe Bigler, Matthias Röthlisberger, Regine Fischer, Hubertus Goto-Azuma, Kumiko Hansson, Margareta E Ruth, Urs |
| author_facet | Rasmussen, Sune Olander Andersen, Katrine K Svensson, Anders M Steffensen, Jørgen Peder Vinther, Bo Møllesøe Clausen, Henrik Brink Siggaard-Andersen, Marie-Louise Johnsen, Sigfús Jóhann Larsen, L B Dahl-Jensen, Dorthe Bigler, Matthias Röthlisberger, Regine Fischer, Hubertus Goto-Azuma, Kumiko Hansson, Margareta E Ruth, Urs |
| collection | Datos científicos de ciencias marinas y ambientales |
| contents | We here present a synchronization of the NGRIP, GRIP, and GISP2 ice cores based mainly on volcanic events over the period 14.9-32.45 ka b2k (before AD 2000), corresponding to Marine Isotope Stage 2 (MIS 2) and the end of MIS 3. The matching provides a basis for applying the recent NGRIP-based Greenland Ice Core Chronology 2005 (GICC05) time scale to the GRIP and GISP2 ice cores, thereby making it possible to compare the synchronized palaeoclimate profiles of the cores in detail and to identify relative accumulation differences between the cores. Based on the matching, a period of anomalous high accumulation rates in the GISP2 ice core is detected within the period 16.5-18.3 ka b2k. The d18O and [Ca2+] profiles of the three cores are presented on the common GICC05 time scale and generally show excellent agreement across the stadial-interstadial transitions and across the two characteristic dust events in Greenland Stadial 3. However, large differences between the d18O and [Ca2+] profiles of the three cores are seen in the same period as the 7-9% increase in the GISP2 accumulation rate. We conclude that changes of the atmospheric circulation are likely to have occurred in this period, altering the spatial gradients in Greenland and resulting in larger variations between the records. |
| format | Dataset Open Access |
| id | pangaea_https___doi_org_10_1594_PANGAEA_774517 |
| institution | PANGAEA |
| language | en |
| publishDate | 2012 |
| publisher | PANGAEA |
| record_format | pangaea |
| spellingShingle | Match points used for synchronization of NGRIP, GRIP, and GISP2 Rasmussen, Sune Olander Andersen, Katrine K Svensson, Anders M Steffensen, Jørgen Peder Vinther, Bo Møllesøe Clausen, Henrik Brink Siggaard-Andersen, Marie-Louise Johnsen, Sigfús Jóhann Larsen, L B Dahl-Jensen, Dorthe Bigler, Matthias Röthlisberger, Regine Fischer, Hubertus Goto-Azuma, Kumiko Hansson, Margareta E Ruth, Urs Depth, reference; Greenland; Greenland Ice Core Projects; GRIP; GRIP__Campaign; GRIP/GISP/NGRIP; ISTUK; ISTUK electromechanical drill; NGRIP; North Greenland Ice Core Project; Sampling/drilling ice We here present a synchronization of the NGRIP, GRIP, and GISP2 ice cores based mainly on volcanic events over the period 14.9-32.45 ka b2k (before AD 2000), corresponding to Marine Isotope Stage 2 (MIS 2) and the end of MIS 3. The matching provides a basis for applying the recent NGRIP-based Greenland Ice Core Chronology 2005 (GICC05) time scale to the GRIP and GISP2 ice cores, thereby making it possible to compare the synchronized palaeoclimate profiles of the cores in detail and to identify relative accumulation differences between the cores. Based on the matching, a period of anomalous high accumulation rates in the GISP2 ice core is detected within the period 16.5-18.3 ka b2k. The d18O and [Ca2+] profiles of the three cores are presented on the common GICC05 time scale and generally show excellent agreement across the stadial-interstadial transitions and across the two characteristic dust events in Greenland Stadial 3. However, large differences between the d18O and [Ca2+] profiles of the three cores are seen in the same period as the 7-9% increase in the GISP2 accumulation rate. We conclude that changes of the atmospheric circulation are likely to have occurred in this period, altering the spatial gradients in Greenland and resulting in larger variations between the records. |
| title | Match points used for synchronization of NGRIP, GRIP, and GISP2 |
| topic | Depth, reference; Greenland; Greenland Ice Core Projects; GRIP; GRIP__Campaign; GRIP/GISP/NGRIP; ISTUK; ISTUK electromechanical drill; NGRIP; North Greenland Ice Core Project; Sampling/drilling ice |
| url | https://doi.org/10.1594/PANGAEA.774517 |