Unraveling the influence of atmospheric evaporative demand on drought and its response to climate change,WIREs Climate Change

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Unraveling the influence of atmospheric evaporative demand on drought and its response to climate change
WIREs Climate Change ( IF 9.4 ) Pub Date : 2019-12-19 , DOI: 10.1002/wcc.632
Sergio M. Vicente‐Serrano ₁ , Tim R. McVicar _{2,

3} , Diego G. Miralles ₄ , Yuting Yang ₅ , Miquel Tomas‐Burguera ₆

Affiliation

This review examines the role of the atmospheric evaporative demand (AED) in drought. AED is a complex concept and here we discuss possible AED definitions, the subsequent metrics to measure and estimate AED, and the different physical drivers that control it. The complex influence of AED on meteorological, environmental/agricultural and hydrological droughts is discussed, stressing the important spatial differences related to the climatological conditions. Likewise, AED influence on drought has implications regarding how different drought metrics consider AED in their attempts to quantify drought severity. Throughout the article, we assess literature findings with respect to: (a) recent drought trends and future projections; (b) the several uncertainties related to data availability; (c) the sensitivity of current drought metrics to AED; and (d) possible roles that both the radiative and physiological effects of increasing atmospheric CO₂ concentrations may play as we progress into the future. All these issues preclude identifying a simple effect of the AED on drought severity. Rather it calls for different evaluations of drought impacts and trends under future climate scenarios, considering the complex feedbacks governing the climate system.

中文翻译：

揭示大气蒸发需求对干旱及其对气候变化的响应的影响

这项审查审查了大气蒸发需求（AED）在干旱中的作用。AED是一个复杂的概念，在这里我们讨论可能的AED定义，随后的度量和估计AED的指标以及控制它的不同物理驱动程序。讨论了AED对气象，环境/农业和水文干旱的复杂影响，强调了与气候条件有关的重要空间差异。同样，AED对干旱的影响也影响着不同的干旱指标在尝试量化干旱严重程度时如何考虑AED。在整篇文章中，我们评估有关以下方面的文献发现：（a）最近的干旱趋势和未来预测；（b）与数据可用性有关的若干不确定性；（c）当前干旱指标对AED的敏感性；随着我们前进，未来可能会出现_2个集中点。所有这些问题都无法确定AED对干旱严重程度的简单影响。而是考虑到控制气候系统的复杂反馈，要求对未来气候情景下的干旱影响和趋势进行不同的评估。

更新日期：2019-12-19

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