Siberian Federal University, Svobodny pr. 79, Krasnoyarsk, Russian Federation, 660041.
Institute for Environmental Sciences, University of Geneva, 66 Bvd Carl Vogt, 1205, Geneva, Switzerland.
Sci Rep. 2020 Sep 14;10(1):15024. doi: 10.1038/s41598-020-71656-w.
Newly developed millennial δC larch tree-ring chronology from Siberia allows reconstruction of summer (July) vapor pressure deficit (VPD) changes in a temperature-limited environment. VPD increased recently, but does not yet exceed the maximum values reconstructed during the Medieval Warm Anomaly. The most humid conditions in the Siberian North were recorded in the Early Medieval Period and during the Little Ice Age. Increasing VPD under elevated air temperature affects the hydrology of these sensitive ecosystems by greater evapotranspiration rates. Further VPD increases will significantly affect Siberian forests most likely leading to drought and forest mortality even under additional access of thawed permafrost water. Adaptation strategies are needed for Siberian forest ecosystems to protect them in a warming world.
新建立的西伯利亚千年马尾松树轮年表可重建温度限制环境下夏季（7 月）水汽压亏缺（VPD）的变化。VPD 最近有所增加，但尚未超过中世纪暖期重建的最高值。西伯利亚北部最潮湿的条件记录在中世纪早期和小冰期。在空气温度升高的情况下，VPD 的增加会通过增加蒸散率来影响这些敏感生态系统的水分循环。进一步增加 VPD 将显著影响西伯利亚森林，即使在解冻的永久冻土水的额外补充下，也很可能导致干旱和森林死亡。需要为西伯利亚森林生态系统制定适应策略，以保护它们免受全球变暖的影响。
