DOI: 10.1016/j.palaeo.2012.10.034
论文题名: Stable carbon isotopes, C3-C4 vegetation, and 12,800years of climate change in central New Mexico, USA
作者: Hall S.A. ; Penner W.L.
刊名: Palaeogeography, Palaeoclimatology, Palaeoecology
ISSN: 0031-0182
出版年: 2013
卷: 369 起始页码: 272
结束页码: 281
语种: 英语
英文关键词: C3-C4 plants
; Climate change
; Holocene
; New Mexico
; Stable carbon isotopes
; Younger Dryas
英文摘要: A thick sequence of fine-textured alluvium in central New Mexico has provided an opportunity to reconstruct vegetation type and climate at the western edge of the Great Plains grassland. The analysis of thirty-eight AMS radiocarbon ages, δ13C values, and modern weather data has produced a 12,800calyr record of changing C3-C4 vegetation, temperature, and precipitation. The record begins with the Younger Dryas that was characterized by C3 plants and was about 2.4°C cooler with over 100mm rainfall than today. After 11,000calyrs BP, the climate became less cool and less wet, reaching present-day conditions by 9000yrs. The middle Holocene was C4, warm, and dry although the δ13C record is incomplete for this interval. From 3300 to 1400calyrs BP, the climate was cool and wet with C3 plants, averaging 0.5°C cooler and 22mm greater rainfall than today, matching other records in the region for a wetter climate. After 1400calyrs BP, the local climate became warm and dry, shifting to C4 vegetation. The severe second century drought, first observed in tree-rings in southern Colorado, is supported by the δ13C data and occurred during the interval A.D. 40 to A.D. 180. Hiatuses in the local alluvial and δ13C record extend from 9000 to 6000calyrs BP and from 1000calyrs BP to present. © 2012 Elsevier B.V. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/69876
Appears in Collections: 过去全球变化的重建
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作者单位: Red Rock Geological Enterprises, 3 Cagua Road, Santa Fe, NM 87508, United States; P3planning, 6100 4th Street NW, No. 442, Albuquerque, NM 87107, United States
Recommended Citation:
Hall S.A.,Penner W.L.. Stable carbon isotopes, C3-C4 vegetation, and 12,800years of climate change in central New Mexico, USA[J]. Palaeogeography, Palaeoclimatology, Palaeoecology,2013-01-01,369