Rising temperatures and changing dynamics can both moisten the air, making it difficult to disentangle these interrelated drivers of water cycle change. However, work by Camille Risi and colleagues presents a new way to distinguish their effects. Using large‐eddy simulations with water isotopic tracers, they show that while warming the sea surface increases the ratio of isotopically heavy‐to‐light water in the tropical marine subcloud layer, strengthening the moisture flux convergence decreases it. This divergent response provides a new framework for examining the complex mechanisms that regulate the development of convection and, ultimately, cloudiness—a target of the 2020 international field campaign EUREC4A (ElUcidating the RolE of Clouds‐Circulation Coupling in ClimAte). Moreover, their findings provide a clearer picture of why water isotopes recorded in tropical paleoproxies are a valuable lens through which to view changes in moisture transport in the past.

中文翻译：

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评价浅对流动态控制的新视角

不断升高的温度和不断变化的动力都会使空气湿润，从而难以弄清水循环变化的这些相互关联的驱动因素。但是，卡米尔·里西（Camille Risi）及其同事的工作提出了一种区分其影响的新方法。通过使用带有水同位素示踪剂的大涡模拟，他们发现，当海面变暖时，热带海洋亚云层中的同位素重水与轻水之比增加，而加强的水汽通量收敛则使之减少。这种分歧的反应为检验调节对流发展以及最终导致混浊的复杂机制提供了新的框架，这是2020年国际野外运动EUREC4A（消除ClimAte中的云-循环耦合的作用）的目标。此外，