Global peatland initiation driven by regionally asynchronous warming
| Autor: | Karen L. Bacon, Alan M. Haywood, Lauren Gregoire, Mark W. Smith, Lev Tarasov, Graeme T. Swindles, Paul J. Morris, Ruza F. Ivanovic, Paul J. Valdes |
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| Jazyk: | angličtina |
| Rok vydání: | 2018 |
| Předmět: |
010506 paleontology
Peat 010504 meteorology & atmospheric sciences Earth science Climate change Wetland 01 natural sciences Global Warming Models Biological Soil SDG 13 - Climate Action Deglaciation Glacial period General Holocene 0105 earth and related environmental sciences geography Multidisciplinary geography.geographical_feature_category Carbon sink Last Glacial Maximum Bioclimate GCM Carbon Biogeography Wetlands Physical Sciences Environmental science Basal date catalog |
| Zdroj: | Morris, P J, Swindles, G T, Valdes, P J, Ivanovic, R F, Gregoire, L J, Smith, M W, Tarasov, L, Haywood, A M & Bacon, K L 2018, ' Global peatland initiation driven by regionally asynchronous warming ', Proceedings of the National Academy of Sciences of the United States of America, vol. 115, no. 19, pp. 4851-4856 . https://doi.org/10.1073/pnas.1717838115 |
| ISSN: | 0027-8424 |
| DOI: | 10.1073/pnas.1717838115 |
| Popis: | Widespread establishment of peatlands since the Last Glacial Maximum represents the activation of a globally important carbon sink, but the drivers of peat initiation are unclear. The role of climate in peat initiation is particularly poorly understood. We used a general circulation model to simulate local changes in climate during the initiation of 1,097 peatlands around the world. We find that peat initiation in deglaciated landscapes in both hemispheres was driven primarily by warming growing seasons, likely through enhanced plant productivity, rather than by any increase in effective precipitation. In Western Siberia, which remained ice-free throughout the last glacial period, the initiation of the world's largest peatland complex was globally unique in that it was triggered by an increase in effective precipitation that inhibited soil respiration and allowed wetland plant communities to establish. Peat initiation in the tropics was only weakly related to climate change, and appears to have been driven primarily by nonclimatic mechanisms such as waterlogging due to tectonic subsidence. Our findings shed light on the genesis and Holocene climate space of one of the world's most carbon-dense ecosystem types, with implications for understanding trajectories of ecological change under changing future climates. |
| Databáze: | OpenAIRE |
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