globalchange  > 过去全球变化的重建
DOI: 10.1016/j.quascirev.2015.06.013
Scopus记录号: 2-s2.0-84945484451
论文题名:
Reconstructing high-resolution climate using CT scanning of unsectioned stalagmites: A case study identifying the mid-Holocene onset of the Mediterranean climate in southern Iberia
作者: Walczak I.W.; Baldini J.U.L.; Baldini L.M.; McDermott F.; Marsden S.; Standish C.D.; Richards D.A.; Andreo B.; Slater J.
刊名: Quaternary Science Reviews
ISSN: 2773791
出版年: 2015
卷: 127
起始页码: 117
结束页码: 128
语种: 英语
英文关键词: CT scanning ; Holocene ; Mediterranean ; NASH ; Palaeoclimatology ; Speleothem
Scopus关键词: Climatology ; Greenhouse gases ; Scanning ; CT scanning ; Holocenes ; Mediterranean ; NASH ; Palaeoclimatology ; Speleothem ; Computerized tomography ; climate conditions ; data set ; global warming ; greenhouse gas ; Holocene ; human activity ; Mediterranean environment ; paleoclimate ; speleothem ; stalagmite ; tomography ; Atlantic Ocean ; Atlantic Ocean (North) ; Iberian Peninsula
英文摘要: The forcing mechanisms responsible for the mid-Holocene onset of the Mediterranean-type climate in south-western Europe are currently unclear, but understanding these is critical for accurate climate projections under future greenhouse gas warming. Additionally, regional studies that present conflicting patterns for the onset and advancement of Mediterranean climatic conditions complicate definitively ascribing causality. Here, we use a new high resolution stalagmite density record obtained non-destructively using Computed Tomography (CT scanning) to reconstruct southern Iberian climate between 9.3 and 2.9 ka BP. We suggest that stalagmite density can be used as a water-excess proxy, with lower densities associated with more variable drip rates, possibly reflecting increased seasonality consistent with expectations from previous studies of speleothem textures and crystal fabrics. Our results reveal an early Holocene humid interval and mid-Holocene year-round aridity that preceded the onset of Mediterranean climate at 5.3 ka BP in southern Iberia. Using this new dataset combined with previously published results, we link the gradual advancement of the Mediterranean climate to the southward migration of the North Atlantic Subtropical High induced by an orbitally driven decrease in Northern Hemisphere insolation. Future anthropogenic warming could result in a reversal of this trend, a northward migration of the North Atlantic Subtropical High, and a return to year-round aridity in south-western Europe. © 2015 Elsevier Ltd.
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/59794
Appears in Collections:过去全球变化的重建

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作者单位: Department of Earth Sciences, Durham University, Durham, United Kingdom; UCD School of Geological Sciences, University College Dublin, Belfield, Dublin 4, Ireland; UCD Earth Institute, University College Dublin, Belfield, Dublin 4, Ireland; Department of Clinical Radiology, University Hospital of North Durham, North Road, Durham, United Kingdom; School of Geographical Sciences, University of Bristol, Bristol, United Kingdom; Departamento de Geología, Facultad de Ciencias, Universidad de Málaga, Calle Albert Einstein, 4, Málaga, Spain

Recommended Citation:
Walczak I.W.,Baldini J.U.L.,Baldini L.M.,et al. Reconstructing high-resolution climate using CT scanning of unsectioned stalagmites: A case study identifying the mid-Holocene onset of the Mediterranean climate in southern Iberia[J]. Quaternary Science Reviews,2015-01-01,127
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