Multidecadal Changes in Wet Season Precipitation Totals Over the Eastern Amazon
Multidecadal Changes in Wet Season Precipitation Totals Over the Eastern Amazon
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DOI：
10.1029/2020gl087478
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发表时间：
2019-12
影响因子：
5.2
通讯作者：
D. Granato-Souza;D. Stahle;M. Torbenson;I. Howard;A. Barbosa;S. Feng;K. Fernandes;J. Schöngart
中科院分区：
文献类型：
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作者：
D. Granato-Souza;D. Stahle;M. Torbenson;I. Howard;A. Barbosa;S. Feng;K. Fernandes;J. Schöngart
仪器观察表明，由于人为变化和自然变化，亚马逊降水和流量极端可能会增加。观察结果。与森林生态系统动力学相关的可变性，并表明过去258年中，亚马逊东部的最近氢气气候变化可能没有前所未有。
Instrumental observations indicate that Amazon precipitation and streamflow extremes have increased during the last 40 years, possibly due to anthropogenic changes and natural variability. How unprecedented these changes might be is difficult to determine because some paleoclimatic, instrumental, and climate model simulations suggest that Amazonian precipitation and streamflow may be subject to multidecadal variability with return intervals longer than most direct observations. A new 258‐year long tree‐ring chronology of Cedrela odorata has been developed in the eastern Amazon and has been used to reconstruct wet season precipitation totals from 1759–2016. Reconstructed drought extremes are associated with significant sea surface temperature anomalies over the tropical Pacific and Atlantic Oceans. Strong multidecadal variance is identified in the reconstruction that may reflect a component of natural rainfall variability relevant to forest ecosystem dynamics and suggesting that recent hydroclimate changes over the eastern Amazon may not be unprecedented over the past 258 years.