the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
On the Role of Volcanism in Dansgaard-Oeschger Cycles
Johannes Lohmann
Anders Svensson
Abstract. A significant influence of major volcanic eruptions on regime shifts and long-term climate variability has been suggested previously. But a statistical assessment of this has been hampered by inaccurate synchronization of large volcanic eruptions to changes in past climate. Here, this is achieved by combining a new record of bipolar volcanism from Greenland and Antarctic ice cores with records of abrupt climate change derived from the same ice cores. We show that at > 99 % confidence bipolar volcanic eruptions occurred more frequently than expected by chance just before the onset of Dansgaard-Oeschger events, the most prominent large-scale abrupt climate changes of the last glacial period. Out of 20 climate change events in the 12–60 ka period, 5 (7) occur within 20 (50) years after a bipolar eruption. Thus, such large eruptions may act as short-term triggers for large-scale abrupt climate change, and may explain part of the variability of Dansgaard-Oeschger cycles.
- Preprint
(652 KB) -
Supplement
(822 KB) - BibTeX
- EndNote
Johannes Lohmann and Anders Svensson


-
RC1: 'Possible fatal flaw', Anonymous Referee #1, 12 Feb 2021
-
RC2: 'Statistical perspectives on volcanic eruptions and the initiation of DO events', Reik Donner, 15 Mar 2021


-
RC1: 'Possible fatal flaw', Anonymous Referee #1, 12 Feb 2021
-
RC2: 'Statistical perspectives on volcanic eruptions and the initiation of DO events', Reik Donner, 15 Mar 2021
Johannes Lohmann and Anders Svensson
Johannes Lohmann and Anders Svensson
Viewed
HTML | XML | Total | Supplement | BibTeX | EndNote | |
---|---|---|---|---|---|---|
842 | 277 | 14 | 1,133 | 87 | 15 | 11 |
- HTML: 842
- PDF: 277
- XML: 14
- Total: 1,133
- Supplement: 87
- BibTeX: 15
- EndNote: 11
Viewed (geographical distribution)
Country | # | Views | % |
---|
Total: | 0 |
HTML: | 0 |
PDF: | 0 |
XML: | 0 |
- 1