Asian inland wildfires driven by glacial–interglacial climate change
Open Access
- 24 February 2020
- journal article
- research article
- Published by Proceedings of the National Academy of Sciences in Proceedings of the National Academy of Sciences of the United States of America
- Vol. 117 (10), 5184-5189
- https://doi.org/10.1073/pnas.1822035117
Abstract
Wildfire can influence climate directly and indirectly, but little is known about the relationships between wildfire and climate during the Quaternary, especially how wildfire patterns varied over glacial–interglacial cycles. Here, we present a high-resolution soot record from the Chinese Loess Plateau; this is a record of large-scale, high-intensity fires over the past 2.6 My. We observed a unique and distinct glacial–interglacial cyclicity of soot over the entire Quaternary Period synchronous with marine δ18O and dust records, which suggests that ice-volume-modulated aridity controlled wildfire occurrences, soot production, and dust fluxes in central Asia. The high-intensity fires were also found to be anticorrelated with global atmospheric CO2 records over the past eight glacial–interglacial cycles, implying a possible connection between the fires, dust, and climate mediated through the iron cycle. The significance of this hypothetical connection remains to be determined, but the relationships revealed in this study hint at the potential importance of wildfire for the global climate system.Funding Information
- Ministry of Science and Technology of the People's Republic of China (2016YFE0109500)
- Chinese Academy of Sciences (QYZDY-SSW-DQC001 and ZDBS-SSW-DQC001)
- National Natural Science Foundation of China (41625015, 41661144020, and 41473119)
This publication has 57 references indexed in Scilit:
- End of the Little Ice Age in the Alps forced by industrial black carbonProceedings of the National Academy of Sciences of the United States of America, 2013
- Atmospheric fluxes of organic N and P to the global oceanGlobal Biogeochemical Cycles, 2012
- Impacts of atmospheric nutrient deposition on marine productivity: Roles of nitrogen, phosphorus, and ironGlobal Biogeochemical Cycles, 2011
- Late Quaternary fire regimes of AustralasiaQuaternary Science Reviews, 2011
- A benthic δ13C‐based proxy for atmospheric pCO2 over the last 1.5 MyrGeophysical Research Letters, 2010
- A Pliocene‐Pleistocene stack of 57 globally distributed benthic δ18O recordsPaleoceanography and Paleoclimatology, 2005
- Pleistocene vertical carbon isotope and carbonate gradients in the South Atlantic sector of the Southern OceanGeochemistry, Geophysics, Geosystems, 2003
- Coeval changes in grain size and sedimentation rate of eolian loess, the Chinese Loess PlateauGeophysical Research Letters, 2001
- A δ13C record of Upper North Atlantic Deep Water during the past 2.6 million yearsPaleoceanography and Paleoclimatology, 1995
- Glacial‐interglacial CO2 change: The Iron HypothesisPaleoceanography and Paleoclimatology, 1990