Academic Journal
Abrupt changes in biomass burning during the last glacial period. ...
| العنوان: | Abrupt changes in biomass burning during the last glacial period. ... |
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| المؤلفون: | Riddell-Young, Ben, Lee, James Edward, Brook, Edward J, Schmitt, Jochen, Fischer, Hubertus, Bauska, Thomas K, Menking, James A, Iseli, René, Clark, Justin Reid |
| بيانات النشر: | University of Bern |
| سنة النشر: | 2025 |
| المجموعة: | DataCite Metadata Store (German National Library of Science and Technology) |
| الوصف: | Understanding the causes of past atmospheric methane (CH4) variability is important for characterizing the relationship between CH4, global climate and terrestrial biogeochemical cycling. Ice core records of atmospheric CH4 contain rapid variations linked to abrupt climate changes of the last glacial period known as Dansgaard-Oeschger (DO) events and Heinrich events (HE)1,2. The drivers of these CH4 variations remain unknown but can be constrained with ice core measurements of the stable isotopic composition of atmospheric CH4, which is sensitive to the strength of different isotopically distinguishable emission categories (microbial, pyrogenic and geologic)3-5. Here we present multi-decadal-scale measurements of δ13C-CH4 and δD-CH4 from the WAIS Divide and Talos Dome ice cores and identify abrupt 1‰ enrichments in δ13C-CH4 synchronous with HE CH4 pulses and 0.5‰ δ13C-CH4 enrichments synchronous with DO CH4 increases. δD-CH4 varied little across the abrupt CH4 changes. Using box models to interpret these ... |
| نوع الوثيقة: | article in journal/newspaper text |
| اللغة: | English |
| DOI: | 10.48620/78851 |
| الاتاحة: | https://dx.doi.org/10.48620/78851 https://boris-portal.unibe.ch/handle/20.500.12422/195334 |
| رقم الانضمام: | edsbas.55D7A875 |
| قاعدة البيانات: | BASE |
| DOI: | 10.48620/78851 |
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