Pan American interactions of Amazon precipitation, streamflow, and tree growth extremes
Pan American interactions of Amazon precipitation, streamflow, and tree growth extremes
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DOI：
10.1088/1748-9326/ababc6
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发表时间：
2020-10
影响因子：
6.7
通讯作者：
D. Stahle;M. Torbenson;I. Howard;D. Granato-Souza;A. Barbosa;Song Feng;J. Schöngart;L. López;R. Villalba;J. Villanueva;K. Fernandes
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文献类型：
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作者：
D. Stahle;M. Torbenson;I. Howard;D. Granato-Souza;A. Barbosa;Song Feng;J. Schöngart;L. López;R. Villalba;J. Villanueva;K. Fernandes
亚马逊中的降雨和河流与北美温度相反的降水异常有关，这是美洲的主要降水量变化模式，在厄尔尼诺（Elniño/Southern）/南部振荡（ENSO）的极端（ENSO）中，这种降水量在整个美洲的降水量上是新的，这是在整个美洲的危险中。赤道亚马逊与1759年至2016年中部纬度的数百种水分敏感的树木环的年代相提并论。即使泛美的共同变异性仍然存在，即使降水量和树木生长的季节性仅在亚马逊和中期之间的部分重叠仅部分重叠，因为在气候上可以持续不断地构成多种态度，而不断增长的是，在整体上可以构成整体竞争，甚至在整体上都可以构成飞机的态度，甚至在稳定的态度上逐渐发展，甚至可以使人变得越来越多，甚至可以使人逐渐发展。树环的数据表明，在过去的258年中，厄尔尼诺对半球间降水和极端树木生长的影响一直很强，但LaNiña的影响力已构成大量元素变化。
Rainfall and river levels in the Amazon are associated with significant precipitation anomalies of opposite sign in temperate North and South America, which is the dominant mode of precipitation variability in the Americas that often arises during extremes of the El Niño/Southern Oscillation (ENSO). This co-variability of precipitation extremes across the Americas is imprinted on tree growth and is detected when new tree-ring chronologies from the eastern equatorial Amazon are compared with hundreds of moisture-sensitive tree-ring chronologies in mid-latitude North and South America from 1759 to 2016. Pan-American co-variability exists even though the seasonality of precipitation and tree growth only partially overlaps between the Amazon and mid-latitudes because ENSO forcing of climate can persist for multiple seasons and can orchestrate a coherent response, even where the growing seasons are not fully synchronized. The tree-ring data indicate that the El Niño influence on inter-hemispheric precipitation and tree growth extremes has been strong and stable over the past 258-years, but the La Niña influence has been subject to large multi-decadal changes. These changes have implications for the dynamics and forecasting of hydroclimatic variability over the Americas and are supported by analyses of the available instrumental data and selected climate model simulations.