Global field observations of tree die-off reveal hotter-drought fingerprint for Earth's forests.
Global field observations of tree die-off reveal hotter-drought fingerprint for Earth's forests.
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DOI：
10.1038/s41467-022-29289-2
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发表时间：
2022-04-05
影响因子：
16.6
通讯作者：
Allen CD
中科院分区：
文献类型：
--
作者：
Hammond WM;Williams AP;Abatzoglou JT;Adams HD;Klein T;López R;Sáenz-Romero C;Hartmann H;Breshears DD;Allen CD
地球的森林在人类世面临着严峻的挑战，包括越来越多的干旱与广泛的森林死亡事件有关。但是，尽管森林对全球生态系统服务至关重要，但它们在变暖的世界中的命运仍然非常不确定。缺乏的是定量测定的共性与脉冲的树木死亡率相关的气候异常，从公布的，现场记录的死亡率事件，需要了解全球树木死亡模式的极端气候事件的作用。在这里，我们建立了一个地理参考的全球数据库，记录了自1970年以来154项同行评议研究中跨越所有树木支持生物群落和大陆的气候引起的死亡事件。我们的分析量化了来自这些树木死亡地点的全球“炎热干旱指纹”，这实际上是树木死亡的炎热和干燥的气候信号，涉及675个地点，包括1,303个地块。这些观测到的死亡年气候条件的频率在预测的变暖下强烈地非线性增加。我们的数据库还为进一步社区开发的、定量的、基于地面的全球树木死亡率监测提供了初步基础。由于干旱和其他与气候变化有关的压力因素，树木死亡率正在增加，但隔离树木死亡率的气候信号具有挑战性。在这里，作者组装了一个地理参考的全球数据库，量化了干旱和炎热的气候如何驱动树木死亡事件。
Earth’s forests face grave challenges in the Anthropocene, including hotter droughts increasingly associated with widespread forest die-off events. But despite the vital importance of forests to global ecosystem services, their fates in a warming world remain highly uncertain. Lacking is quantitative determination of commonality in climate anomalies associated with pulses of tree mortality—from published, field-documented mortality events—required for understanding the role of extreme climate events in overall global tree die-off patterns. Here we established a geo-referenced global database documenting climate-induced mortality events spanning all tree-supporting biomes and continents, from 154 peer-reviewed studies since 1970. Our analysis quantifies a global “hotter-drought fingerprint” from these tree-mortality sites—effectively a hotter and drier climate signal for tree mortality—across 675 locations encompassing 1,303 plots. Frequency of these observed mortality-year climate conditions strongly increases nonlinearly under projected warming. Our database also provides initial footing for further community-developed, quantitative, ground-based monitoring of global tree mortality. Tree mortality is increasing due to droughts and other climate change-related stressors, but isolating climate signals for tree mortality is challenging. Here, the authors assemble a geo-referenced global database that quantifies how drought and hotter climate drive tree mortality events.
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影响因子：
9.8
作者：
Abatzoglou JT;Dobrowski SZ;Parks SA;Hegewisch KC
通讯作者：
Hegewisch KC
影响因子：
3.7
作者：
Fettig, Christopher J.;Mortenson, Leif A.;Foulk, Patra B.
通讯作者：
Foulk, Patra B.
影响因子：
1.6
作者：
Beech, E.;Rivers, M.;Smith, P. P.
通讯作者：
Smith, P. P.
影响因子：
3
作者：
Cailleret, Maxime;Nourtier, Marie;Davi, Hendrik
通讯作者：
Davi, Hendrik
影响因子：
2.7
作者：
Allen, Craig D.;Breshears, David D.;McDowell, Nate G.
通讯作者：
McDowell, Nate G.