The Experts below are selected from a list of 360 Experts worldwide ranked by ideXlab platform
Zhisheng An - One of the best experts on this subject based on the ideXlab platform.
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asian inland wildfires driven by glacial interglacial climate change
Proceedings of the National Academy of Sciences of the United States of America, 2020Co-Authors: Zhisheng An, Jennifer R Marlon, Raymond S Bradley, Changlin Zhan, R Arimoto, Weijian Zhou, Feng Wu, Qiyuan WangAbstract: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.
Marcia Ernesto - One of the best experts on this subject based on the ideXlab platform.
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millennial scale climate cycles in permian carboniferous rhythmites permanent feature throughout geologic time
Geology, 2012Co-Authors: Daniel R Franco, Linda A. Hinnov, Marcia ErnestoAbstract:Two late Paleozoic glacial rhythmite successions from the Itarare Group (Parana Basin, Brazil) were examined for paleoclimate variations. Paleomagnetic (characteristic remanent magnetization, ChRM) and magnetic susceptibility (K z ) measurements taken from the rhythmites are interpreted as paleoclimatic proxies. Ratios of low-frequency components in the K z variations suggest Milankovitch Periodicities; this leads to recognition of other, millennial-scale variations reminiscent of abrupt climate changes during late Quaternary time, and are suggestive of Bond cycles and the 2.4 k.y. solar cycle. We infer from these patterns that millennial-scale climate change is not restricted to the Quaternary Period, and that millennial forcing mechanisms may have been prevalent throughout geologic time.
Qiyuan Wang - One of the best experts on this subject based on the ideXlab platform.
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asian inland wildfires driven by glacial interglacial climate change
Proceedings of the National Academy of Sciences of the United States of America, 2020Co-Authors: Zhisheng An, Jennifer R Marlon, Raymond S Bradley, Changlin Zhan, R Arimoto, Weijian Zhou, Feng Wu, Qiyuan WangAbstract: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.
Weijian Zhou - One of the best experts on this subject based on the ideXlab platform.
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asian inland wildfires driven by glacial interglacial climate change
Proceedings of the National Academy of Sciences of the United States of America, 2020Co-Authors: Zhisheng An, Jennifer R Marlon, Raymond S Bradley, Changlin Zhan, R Arimoto, Weijian Zhou, Feng Wu, Qiyuan WangAbstract: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.
Loïc Pellissier - One of the best experts on this subject based on the ideXlab platform.
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Historical and contemporary determinants of global phylogenetic structure in tropical reef fish faunas
Ecography, 2016Co-Authors: Fabien Leprieur, David R Bellwood, Michel Kulbicki, Simona Colosio, Patrice Descombes, Valeriano Parravicini, Peter F. Cowman, David Mouillot, Loïc PellissierAbstract:Identifying the main determinants of tropical marine biodiversity is essential for devising appropriate conservation measures mitigating the ongoing degradation of coral reef habitats. Based on a gridded distribution database and phylogenetic information, we compared the phylogenetic structure of assemblages for three tropical reef fish families (Labridae: wrasses, Pomacentridae: damselfishes and Chaetodontidae: butterflyfishes) using the net relatedness (NRI) and nearest taxon (NTI) indices. We then related these indices to contemporary and historical environmental conditions of coral reefs using spatial regression analyses. Higher levels of phylogenetic clustering were found for fish assemblages in the Indo‐Australian Archipelago (IAA), and more particularly when considering the NTI index. The phylogenetic structure of the Pomacentridae, and to a lower extent of the Chaeotodontidae and Labridae, was primarily associated with the location of refugia during the Quaternary Period. Phylogenetic clustering in the IAA may partly result from vicariance events associated with coral reef fragmentation during the glacial Periods of the Quaternary. Variation in the patterns among fish families further suggest that dispersal abilities may have interacted with past habitat availability in shaping the phylogenetic structure of tropical reef fish assemblages.
