Arid
DOI10.1177/0959683609104031
Holocene fire-related alluvial-fan deposition and climate in ponderosa pine and mixed-conifer forests, Sacramento Mountains, New Mexico, USA
Frechettes, Jedediah D.; Meyer, Grant A.
通讯作者Frechettes, Jedediah D.
来源期刊HOLOCENE
ISSN0959-6836
EISSN1477-0911
出版年2009
卷号19期号:4页码:639-651
英文摘要

We employed Zap dating of alluvial-fan deposits in ponderosa pine and mixed-conifer forests of the Sacramento Mountains, New Mexico to document Holocene fires and related geomorphic impacts. Rapid aggradation by charcoal-rich debris flows occurred in the middle Holocene (5800-4200 cal. yr BP) indicating episodic sedimentation following severe fires. Fire-related deposition virtually ceased similar to 4200 cal. yr BP, with most fan deposits indicating slower aggradation with cumulic soil development until 1800 cal. yr BP. From 1800 to 500 cal. yr BP, fire-related sedimentation increased again, although not to middle Holocene levels. A peak in fire-related sedimentation c. 650 cal. yr BP corresponds to widespread severe drought in the southwestern USA. Limited fire-related sedimentation is evident from 500 to 100 cal. yr BP, consistent with ’Little Ice Age’ climate and tree-ring records indicating frequent low-severity fires, although at least one severe fire burned in this interval. Increased fire-related sedimentation corresponds to generally warmer conditions. We infer that higher climate variability was also involved, including multidecadal wet periods that limited surface fires and allowed stand densities to increase, promoting severe fires in subsequent severe droughts. sire has contributed significantly to Holocene valley aggradation. Local fan channel incision followed recent fires, but major nineteenth-twentieth century arroyo cutting appears unprecedented during the Holocene.


英文关键词Paleofire alluvial fans sedimentary charcoal erosion geomorphology radiocarbon fire history ponderosa pine New Mexico
类型Article
语种英语
国家USA
收录类别SCI-E
WOS记录号WOS:000266818100010
WOS关键词YELLOWSTONE-NATIONAL-PARK ; DEBRIS-FLOW INITIATION ; WESTERN UNITED-STATES ; AMERICAN SOUTHWEST ; BLACK-HILLS ; MULTIDECADAL DROUGHT ; CHIHUAHUAN DESERT ; AGE CALIBRATION ; RADIOCARBON AGE ; MIDDLE HOLOCENE
WOS类目Geography, Physical ; Geosciences, Multidisciplinary
WOS研究方向Physical Geography ; Geology
资源类型期刊论文
条目标识符http://119.78.100.177/qdio/handle/2XILL650/160893
作者单位Univ New Mexico, Dept Earth & Planetary Sci, Albuquerque, NM 87131 USA
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GB/T 7714
Frechettes, Jedediah D.,Meyer, Grant A.. Holocene fire-related alluvial-fan deposition and climate in ponderosa pine and mixed-conifer forests, Sacramento Mountains, New Mexico, USA[J],2009,19(4):639-651.
APA Frechettes, Jedediah D.,&Meyer, Grant A..(2009).Holocene fire-related alluvial-fan deposition and climate in ponderosa pine and mixed-conifer forests, Sacramento Mountains, New Mexico, USA.HOLOCENE,19(4),639-651.
MLA Frechettes, Jedediah D.,et al."Holocene fire-related alluvial-fan deposition and climate in ponderosa pine and mixed-conifer forests, Sacramento Mountains, New Mexico, USA".HOLOCENE 19.4(2009):639-651.
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