Reevaluating Links Between Meteorite Impacts and Early Cenozoic Global Warming
Abstract The Paleocene‐Eocene Thermal Maximum (PETM) and the lower Chron 29n hyperthermal event were recently proposed to have been triggered by the meteorite impacts that formed the Marquez Dome (Texas, USA; 58.3 ± 3.1 Ma) and Boltysh (Ukraine; 65.39 ± 0.14 Ma) craters, respectively. We use shock p...
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| Format: | Article |
| Language: | English |
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Wiley
2022-06-01
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| Series: | Geophysical Research Letters |
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| Online Access: | https://doi.org/10.1029/2022GL099313 |
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| author | A. Zorzi S. M. Tikoo G. C. Beroza N. H. Sleep |
| author_facet | A. Zorzi S. M. Tikoo G. C. Beroza N. H. Sleep |
| author_sort | A. Zorzi |
| collection | DOAJ |
| description | Abstract The Paleocene‐Eocene Thermal Maximum (PETM) and the lower Chron 29n hyperthermal event were recently proposed to have been triggered by the meteorite impacts that formed the Marquez Dome (Texas, USA; 58.3 ± 3.1 Ma) and Boltysh (Ukraine; 65.39 ± 0.14 Ma) craters, respectively. We use shock physics hydrocode simulations and radiative forcing calculations to quantify the expected global temperature increase associated with impacts of different scales via the release of CO2 and CH4 sourced from target rocks into the atmosphere. Our results suggest that the <2 km diameter impactors associated with the Marquez Dome and Boltysh craters were too small to have induced hyperthermal‐like (>1 K) temperature changes, even if target rocks were carbon‐rich; >10 km diameter impactors may produce hyperthermal events, but such large impacts are predicted to be uncommon during the Cenozoic era (2–4 objects per Gyr). |
| format | Article |
| id | doaj-art-389ace4336c64720b697f508beaddfe6 |
| institution | Kabale University |
| issn | 0094-8276 1944-8007 |
| language | English |
| publishDate | 2022-06-01 |
| publisher | Wiley |
| record_format | Article |
| series | Geophysical Research Letters |
| spelling | doaj-art-389ace4336c64720b697f508beaddfe62025-01-22T14:38:16ZengWileyGeophysical Research Letters0094-82761944-80072022-06-014912n/an/a10.1029/2022GL099313Reevaluating Links Between Meteorite Impacts and Early Cenozoic Global WarmingA. Zorzi0S. M. Tikoo1G. C. Beroza2N. H. Sleep3Department of Geological Sciences Stanford University Stanford CA USADepartment of Geological Sciences Stanford University Stanford CA USADepartment of Geophysics Stanford University Stanford CA USADepartment of Geophysics Stanford University Stanford CA USAAbstract The Paleocene‐Eocene Thermal Maximum (PETM) and the lower Chron 29n hyperthermal event were recently proposed to have been triggered by the meteorite impacts that formed the Marquez Dome (Texas, USA; 58.3 ± 3.1 Ma) and Boltysh (Ukraine; 65.39 ± 0.14 Ma) craters, respectively. We use shock physics hydrocode simulations and radiative forcing calculations to quantify the expected global temperature increase associated with impacts of different scales via the release of CO2 and CH4 sourced from target rocks into the atmosphere. Our results suggest that the <2 km diameter impactors associated with the Marquez Dome and Boltysh craters were too small to have induced hyperthermal‐like (>1 K) temperature changes, even if target rocks were carbon‐rich; >10 km diameter impactors may produce hyperthermal events, but such large impacts are predicted to be uncommon during the Cenozoic era (2–4 objects per Gyr).https://doi.org/10.1029/2022GL099313impact phenomenaclimate impactpaleoclimatologyabrupt/rapid climate changeCenozoic |
| spellingShingle | A. Zorzi S. M. Tikoo G. C. Beroza N. H. Sleep Reevaluating Links Between Meteorite Impacts and Early Cenozoic Global Warming Geophysical Research Letters impact phenomena climate impact paleoclimatology abrupt/rapid climate change Cenozoic |
| title | Reevaluating Links Between Meteorite Impacts and Early Cenozoic Global Warming |
| title_full | Reevaluating Links Between Meteorite Impacts and Early Cenozoic Global Warming |
| title_fullStr | Reevaluating Links Between Meteorite Impacts and Early Cenozoic Global Warming |
| title_full_unstemmed | Reevaluating Links Between Meteorite Impacts and Early Cenozoic Global Warming |
| title_short | Reevaluating Links Between Meteorite Impacts and Early Cenozoic Global Warming |
| title_sort | reevaluating links between meteorite impacts and early cenozoic global warming |
| topic | impact phenomena climate impact paleoclimatology abrupt/rapid climate change Cenozoic |
| url | https://doi.org/10.1029/2022GL099313 |
| work_keys_str_mv | AT azorzi reevaluatinglinksbetweenmeteoriteimpactsandearlycenozoicglobalwarming AT smtikoo reevaluatinglinksbetweenmeteoriteimpactsandearlycenozoicglobalwarming AT gcberoza reevaluatinglinksbetweenmeteoriteimpactsandearlycenozoicglobalwarming AT nhsleep reevaluatinglinksbetweenmeteoriteimpactsandearlycenozoicglobalwarming |