2,200-Year tree-ring and lake-sediment based snowpack reconstruction for the northern Rocky Mountains highlights the historic magnitude of recent snow drought
2,200-Year tree-ring and lake-sediment based snowpack reconstruction for the northern Rocky Mountains highlights the historic magnitude of recent snow drought
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落基山脉北部 2,200 年树木年轮和湖泊沉积物积雪重建凸显了近期雪旱的历史性严重程度
DOI：
10.1016/j.qsa.2020.100013
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发表时间：
2020
影响因子：
4.5
通讯作者：
McWethy, David B.
中科院分区：
文献类型：
--
作者：
Schoenemann, Spruce W.;Martin, Justin T.;Pederson, Gregory T.;McWethy, David B.
近几十年来，落基山积雪水平经历了快速下降，但长期的积雪记录之前，积雪观测站在世纪早期和中期安装是有限的。迄今为止，北方落基山脉4月1日雪水当量（SWE）的少量基于树木年轮的重建已将积雪变化的现代记录扩展到公元1200年碳酸盐同位素湖泊沉积物记录，提供了一个机会，通过全新世进一步扩展基于树木年轮的重建，提供了千年尺度的时间记录，允许多尺度的积雪变化的驱动程序的评估，从内部气候动态轨道尺度强迫。在这里，我们提出了一个2200年的初步重建的北方落基山脉积雪的基础上，从福伊湖，蒙大拿州的沉积物碳酸盐的δ 18 O测量。我们探讨了湖泊沉积物δ 18 O的统计校准，每年解决积雪重建树木年轮，并制定了一种方法来评估和量化这种重建方法的潜在误差来源。沉积物为基础的积雪重建显示了强大的低频变化，积雪在过去的两千年，很少有雪干旱接近最近的积雪下降的幅度。鉴于高分辨率、富含碳酸盐的湖泊沉积物记录的可用性越来越高，这样的重建可以帮助我们更好地了解积雪条件在以前的气候事件下是如何变化的（全新世中期气候最佳时期）。9 - 6 ka），为预测未来积雪状况提供了重要见解。
In recent decades, Rocky Mountain accumulated snowpack levels have experienced rapid declines, yet long-term records of snowpack prior to the installation of snowpack observation stations in the early and mid 20th century are limited. To date, a small number of tree-ring based reconstructions of April 1 Snow Water Equivalent (SWE) in the northern Rocky Mountains have extended modern records of snowpack variability to ∼1200 C.E. Carbonate isotope lake sediment records, provide an opportunity to further extend tree-ring based reconstructions through the Holocene, providing a millennial-scale temporal record that allows for an evaluation of multi-scale drivers of snowpack variability, from internal climate dynamics to orbital-scale forcings. Here we present a ∼2200 year preliminary reconstruction of northern Rockies snowpack based on δ18O measurements of sediment carbonates collected from Foy Lake, Montana. We explore the statistical calibration of lake sediment δ18O to an annually resolved snowpack reconstruction from tree rings, and develop an approach to assess and quantify potential sources of error in this reconstruction approach. The sediment-based snowpack reconstruction shows strong low-frequency variability in snowpack over the last two millennia with few snow droughts approaching the magnitude of recent snowpack declines. Given the growing availability of high-resolution, carbonate-rich lake sediment records, such reconstructions could help improve our understanding of how snowpack conditions varied under previous climatic events (mid-Holocene climate optimum ca. 9−6 ka), providing critical insights for anticipating future snowpack conditions.
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影响因子：
2.2
作者：
Zachary J. Lundeen;A. Brunelle;S. Burns;V. Polyak;Y. Asmerom
通讯作者：
Zachary J. Lundeen;A. Brunelle;S. Burns;V. Polyak;Y. Asmerom
影响因子：
2.3
作者：
A. Brunelle;T. Minckley;E. Lips;Paul Burnett
通讯作者：
A. Brunelle;T. Minckley;E. Lips;Paul Burnett
影响因子：
56.9
作者：
Westerling, A. L.;Hidalgo, H. G.;Swetnam, T. W.
通讯作者：
Swetnam, T. W.
影响因子：
5.4
作者：
Bales, Roger C.;Molotch, Noah P.;Dozier, Jeff
通讯作者：
Dozier, Jeff
使用森林清查和年轮数据分析重建犹他州网格化雪水当量
影响因子：
3.4
作者：
D. Barandiaran;S. Wang;R. DeRose
通讯作者：
R. DeRose