气候变化领域集成服务门户(CCPortal): Reconstruction of seasonal and water-year precipitation anomalies from tree-ring records of the southwestern United States

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DOI	10.1016/j.palaeo.2020.109689
	Reconstruction of seasonal and water-year precipitation anomalies from tree-ring records of the southwestern United States
	Ziaco E.; Miley N.; Biondi F.
发表日期	2020
ISSN	0031-0182
卷号	547
英文摘要	The annual cycle of precipitation in the southwestern United States is characterized by a bimodal distribution. El Niño-Southern Oscillation (ENSO) episodes influence cool-season precipitation, while the North American Monsoon (NAM) brings warm-season rainfall to the region. Because the covariability of the two seasons may result in both wet and dry water-year anomalies, we evaluated the long-term contribution of cool and warm-season precipitation to water-year totals using newly collected and/or updated tree-ring chronologies. Precipitation reconstructions back to the late 17th century, from 1663 to 2015, were produced using a total of 183 stem increment cores collected from seven ponderosa pine (Pinus ponderosa) stands located along the southern edge of the Colorado Plateau in Arizona and New Mexico. Latewood chronologies were most correlated with July–August rainfall brought by the North American Monsoon, while earlywood chronologies were related to November–February precipitation, also matching the time-series variability of the Southern Oscillation Index. Total ring-width chronologies reflected water-year precipitation, and were used to account for precipitation falling outside of either the cool or the warm season. While seasonal variability of precipitation was the main driver of regional climatic extremes, the amount of precipitation falling outside the cool and warm seasons did not play a consistent role in determining frequency and severity of droughts and pluvials. This study highlights how intra-annual paleoclimatic reconstructions help with understanding the contribution of seasonal climate to wet and dry episodes influenced by large-scale climatic modes. © 2020 Elsevier B.V.
英文关键词	Dendroclimatology; ENSO; North American Monsoon; Pinus ponderosa; Ponderosa pine; SOI
语种	英语
scopus关键词	annual cycle; bimodal association; chronology; coniferous tree; dendroclimatology; El Nino-Southern Oscillation; frequency analysis; monsoon; paleoclimate; precipitation (climatology); seasonal variation; stand structure; tree ring; Arizona; Colorado Plateau; New Mexico; United States; Pinus ponderosa
来源期刊	Palaeogeography, Palaeoclimatology, Palaeoecology
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/150534
作者单位	DendroLab, Department of Natural Resources & Environmental Sciences, University of Nevada, Reno, 89557, United States; Global Water Center, University of Nevada, Reno, 89557, United States
推荐引用方式 GB/T 7714	Ziaco E.,Miley N.,Biondi F.. Reconstruction of seasonal and water-year precipitation anomalies from tree-ring records of the southwestern United States[J],2020,547.
APA	Ziaco E.,Miley N.,&Biondi F..(2020).Reconstruction of seasonal and water-year precipitation anomalies from tree-ring records of the southwestern United States.Palaeogeography, Palaeoclimatology, Palaeoecology,547.
MLA	Ziaco E.,et al."Reconstruction of seasonal and water-year precipitation anomalies from tree-ring records of the southwestern United States".Palaeogeography, Palaeoclimatology, Palaeoecology 547(2020).