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30 results on '"Lohmann, Johannes"'

1. Climate tipping point interactions and cascades: a review

Author

Marine and Atmospheric Research, Sub Physical Oceanography, Sub Mathematical Modeling, Sub Algemeen Marine & Atmospheric Res, Spatial Ecology and Global Change, Wunderling, Nico, Heydt, Anna S von der, Aksenov, Yevgeny, Barker, Stephen, Bastiaansen, Robbin, Brovkin, Victor, Brunetti, Maura, Couplet, Victor, Kleinen, Thomas, Lear, Caroline, Lohmann, Johannes Jakob, Roman-Cuesta, Rosa Maria, Sinet, Sacha, Swingedouw, Didier, Winkelmann, Ricarda, Anand, Pallavi, Barichivich, Jonathan, Bathiany, Sebastian, Baudena, Mara, Bruun, John, Chiessi, Cristiano, Coxall, Helen, Docquier, David, Donges, Jonathan, Falkena, Swinda K.J., Klose, Ann Kristin, Obura, David, Rocha, Juan Carlos, Rynders, Stefanie, Steinert, Norman J., Willeit, Matteo, Marine and Atmospheric Research, Sub Physical Oceanography, Sub Mathematical Modeling, Sub Algemeen Marine & Atmospheric Res, Spatial Ecology and Global Change, Wunderling, Nico, Heydt, Anna S von der, Aksenov, Yevgeny, Barker, Stephen, Bastiaansen, Robbin, Brovkin, Victor, Brunetti, Maura, Couplet, Victor, Kleinen, Thomas, Lear, Caroline, Lohmann, Johannes Jakob, Roman-Cuesta, Rosa Maria, Sinet, Sacha, Swingedouw, Didier, Winkelmann, Ricarda, Anand, Pallavi, Barichivich, Jonathan, Bathiany, Sebastian, Baudena, Mara, Bruun, John, Chiessi, Cristiano, Coxall, Helen, Docquier, David, Donges, Jonathan, Falkena, Swinda K.J., Klose, Ann Kristin, Obura, David, Rocha, Juan Carlos, Rynders, Stefanie, Steinert, Norman J., and Willeit, Matteo

Published
2024

3. Climate tipping point interactions and cascades: A review

Author

Wunderling, Nico, primary, von der Heydt, Anna, additional, Aksenov, Yevgeny, additional, Barker, Stephen, additional, Bastiaansen, Robbin, additional, Brovkin, Victor, additional, Brunetti, Maura, additional, Couplet, Victor, additional, Kleinen, Thomas, additional, Lear, Caroline H., additional, Lohmann, Johannes, additional, Roman-Cuesta, Rosa Maria, additional, Sinet, Sacha, additional, Swingedouw, Didier, additional, Winkelmann, Ricarda, additional, Anand, Pallavi, additional, Barichivich, Jonathan, additional, Bathiany, Sebastian, additional, Baudena, Mara, additional, Bruun, John T., additional, Chiessi, Christiano M., additional, Coxall, Helen K., additional, Docquier, David, additional, Donges, Jonathan F., additional, Falkena, Swinda K. J., additional, Klose, Ann Kristin, additional, Obura, David, additional, Rocha, Juan, additional, Rynders, Stefanie, additional, Steinert, Norman Julius, additional, and Willeit, Matteo, additional

Published
2023
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4. Ice core evidence for major volcanic eruptions at the onset of Dansgaard–Oeschger warming events

Author

Lohmann, Johannes and Svensson, Anders

Subjects
Global and Planetary Change, MAGNITUDE, IMPACT, Stratigraphy, LAST GLACIAL PERIOD, INSTABILITY, LATITUDE, Paleontology, GREENLAND, RECORDS, MERIDIONAL OVERTURNING CIRCULATION, ABRUPT CLIMATE-CHANGE, ATLANTIC-OCEAN
Abstract

While a significant influence of volcanic activity on Holocene climate is well-established, an equally prominent role of major eruptions in the climate variability and regime shifts during the Quaternary glacial cycles has been suggested. Previous statistical assessments of this were challenged by inaccurate synchronization of large volcanic eruptions to changes in past climate. Here, this is alleviated 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 bipolar volcanic eruptions occurred significantly more frequently than expected by chance just before the onset of Dansgaard–Oeschger events, which are the most prominent large-scale abrupt climate changes in the last glacial period. Out of 20 abrupt warming events in the 12–60 ka period, 5 (7) occur within 20 (50) years after a bipolar eruption. We hypothesize that this may be a result of the direct influence of volcanic cooling on the Atlantic meridional overturning circulation, which is widely regarded as the main climate subsystem involved in Dansgaard–Oeschger cycles. Transitions from a weak to a strong circulation mode may be triggered by cooling in the North Atlantic given that the circulation is close to a stability threshold. We illustrate this suggestion by simulations with an ocean-only general circulation model forced by short-term volcanic cooling. The analysis presented suggests that large eruptions may act as short-term triggers for large-scale abrupt climate change and may explain some of the variability of Dansgaard–Oeschger cycles. While we argue that the bipolar catalogue used here covers a sufficiently large portion of the eruptions with the strongest global climate impact, volcanic events restricted to either the Northern or Southern Hemisphere may likewise contribute to abrupt climate change.

Published
2022

9. Magnitude, frequency and climate forcing of global volcanism during the last glacial period as seen in Greenland and Antarctic ice cores (60-9 ka)

Author

Lin, Jiamei, primary, Svensson, Anders, additional, S. Hvidberg, Christine, additional, Lohmann, Johannes, additional, Kristiansen, Steffen, additional, Dahl-Jensen, Dorthe, additional, Peder Steffensen, Jørgen, additional, Olander Rasmussen, Sune, additional, Cook, Eliza, additional, Astrid Kjær, Helle, additional, M. Vinther, Bo, additional, Fischer, Hubertus, additional, Stocker, Thomas, additional, Sigl, Michael, additional, Bigler, Matthias, additional, Severi, Mirko, additional, Traversi, Rita, additional, and Mulvaney, Robert, additional

Published
2022
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12. Magnitude, frequency and climate forcing of global volcanism during the last glacial period as seen in Greenland and Antarctic ice cores (60–9 ka)

Author

Lin, Jiamei, primary, Svensson, Anders, additional, Hvidberg, Christine S., additional, Lohmann, Johannes, additional, Kristiansen, Steffen, additional, Dahl-Jensen, Dorthe, additional, Steffensen, Jørgen Peder, additional, Rasmussen, Sune Olander, additional, Cook, Eliza, additional, Kjær, Helle Astrid, additional, Vinther, Bo M., additional, Fischer, Hubertus, additional, Stocker, Thomas, additional, Sigl, Michael, additional, Bigler, Matthias, additional, Severi, Mirko, additional, Traversi, Rita, additional, and Mulvaney, Robert, additional

Published
2021
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13. Supplementary material to "Magnitude, frequency and climate forcing of global volcanism during the last glacial period as seen in Greenland and Antarctic ice cores (60–9 ka)"

Author

Lin, Jiamei, primary, Svensson, Anders, additional, Hvidberg, Christine S., additional, Lohmann, Johannes, additional, Kristiansen, Steffen, additional, Dahl-Jensen, Dorthe, additional, Steffensen, Jørgen Peder, additional, Rasmussen, Sune Olander, additional, Cook, Eliza, additional, Kjær, Helle Astrid, additional, Vinther, Bo M., additional, Fischer, Hubertus, additional, Stocker, Thomas, additional, Sigl, Michael, additional, Bigler, Matthias, additional, Severi, Mirko, additional, Traversi, Rita, additional, and Mulvaney, Robert, additional

Published
2021
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15. Abrupt climate change as a rate-dependent cascading tipping point

Author

Sub Algemeen Marine & Atmospheric Res, Sub Physical Oceanography, Marine and Atmospheric Research, Lohmann, Johannes, Castellana, Daniele, Ditlevsen, Peter D., Dijkstra, Henk A., Sub Algemeen Marine & Atmospheric Res, Sub Physical Oceanography, Marine and Atmospheric Research, Lohmann, Johannes, Castellana, Daniele, Ditlevsen, Peter D., and Dijkstra, Henk A.

Published
2021

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