globalchange  > 影响、适应和脆弱性
DOI: 10.5194/cp-14-665-2018
Scopus记录号: 2-s2.0-85047765709
论文题名:
Placing the Common Era in a Holocene context: Millennial to centennial patterns and trends in the hydroclimate of North America over the past 2000 years
作者: Shuman B.N.; Routson C.; McKay N.; Fritz S.; Kaufman D.; Kirby M.E.; Nolan C.; Pederson G.T.; St-Jacques J.M.
刊名: Climate of the Past
ISSN: 18149324
出版年: 2018
卷: 14, 期:5
起始页码: 665
结束页码: 686
语种: 英语
Scopus关键词: annual variation ; Holocene ; Little Ice Age ; Medieval Warm Period ; paleoclimate ; precipitation (climatology) ; trend analysis ; Arctic ; Central America ; Pacific Northwest ; United States
英文摘要: A synthesis of 93 hydrologic records from across North and Central America, and adjacent tropical and Arctic islands, reveals centennial to millennial trends in the regional hydroclimates of the Common Era (CE; past 2000 years). The hydrological records derive from materials stored in lakes, bogs, caves, and ice from extant glaciers, which have the continuity through time to preserve low-frequency (> 100 year) climate signals that may extend deeper into the Holocene. The most common pattern, represented in 46 (49%) of the records, indicates that the centuries before 1000CE were drier than the centuries since that time. Principal component analysis indicates that millennial-scale trends represent the dominant pattern of variance in the southwestern US, northeastern US, mid-continent, Pacific Northwest, Arctic, and tropics, although not all records within a region show the same direction of change. The Pacific Northwest and the southernmost tier of the tropical sites tended to dry toward present, as many other areas became wetter than before. In 22 records (24%), the Medieval Climate Anomaly period (800-1300CE) was drier than the Little Ice Age (1400-1900CE), but in many cases the difference was part of the longer millennial-scale trend, and, in 25 records (27%), the Medieval Climate Anomaly period represented a pluvial (wet) phase. Where quantitative records permitted a comparison, we found that centennial-scale fluctuations over the Common Era represented changes of 3-7% in the modern interannual range of variability in precipitation, but the accumulation of these long-term trends over the entirety of the Holocene caused recent centuries to be significantly wetter, on average, than most of the past 11000 years. © 2018 Author(s).
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/109565
Appears in Collections:影响、适应和脆弱性
气候变化事实与影响

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作者单位: Roy J. Shlemon Center for Quaternary Studies, Department of Geology and Geophysics, University of Wyoming, Laramie, WY 82071, United States; School of Earth Sciences and Environmental Sustainability, Northern Arizona University, Flagstaff, AZ 86011, United States; Department of Earth and Atmospheric Sciences, University of Nebraska, Lincoln, NE 68588, United States; Department of Geological Sciences, California State University, Fullerton, CA 92834, United States; Department of Geosciences, University of ArizonaAZ 85721, United States; Northern Rocky Mountain Science Center, US Geological Survey, Bozeman, MN 59715, United States; Department of Geography Planning and Environment, Concordia University, Montreal, QC H3G 1M8, Canada

Recommended Citation:
Shuman B.N.,Routson C.,McKay N.,et al. Placing the Common Era in a Holocene context: Millennial to centennial patterns and trends in the hydroclimate of North America over the past 2000 years[J]. Climate of the Past,2018-01-01,14(5)
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