Water isotopes, climate variability, and the hydrological cycle: recent advances and new frontiers
Water isotopes, climate variability, and the hydrological cycle: recent advances and new frontiers
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DOI：
10.1088/2752-5295/accbe1
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发表时间：
2023-04
期刊：
影响因子：
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通讯作者：
S. Dee;A. Bailey;J. L. Conroy;A. Atwood;S. Stevenson;J. Nusbaumer;D. Noone
中科院分区：
文献类型：
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作者：
S. Dee;A. Bailey;J. L. Conroy;A. Atwood;S. Stevenson;J. Nusbaumer;D. Noone
水文循环是气候系统的一个基本组成部分，具有重要的社会和生态意义。然而，我们对水通量及其对温室气体强迫增加的反应的理解仍然存在差距。水中氧和氢的稳定同位素比率为评价水文过程和调查它们在气候系统的可变性及其对变化的敏感性中的作用提供了独特的机会。水的同位素也构成了各种档案中许多古气候指标的基础，包括冰芯、湖泊和海洋沉积物、珊瑚和洞穴。这些记录保存了仪器观测之前有关过去水文可变性的大部分可用信息。因此，水同位素提供了一种“共同货币”，将古气候档案与现代观测联系起来，使我们能够在广泛的时间和长度尺度上评估水文过程及其对气候变异性的影响。在总结了水的同位素测量和建模方面的进展并描述了水的同位素应用以了解水文过程的以往文献的基础上，本专题综述反映了从同位素研究中对气候变异性的新见解。我们强调了新的工作和机会，以加强我们的理解和预测技能，并提出一套建议，以促进气候研究的观测和基于模型的工具。最后，我们强调了在自然气候多变性的固有噪声背景下，更好地限制气候敏感性和确定人为驱动的水文变化的机会。
The hydrologic cycle is a fundamental component of the climate system with critical societal and ecological relevance. Yet gaps persist in our understanding of water fluxes and their response to increased greenhouse gas forcing. The stable isotope ratios of oxygen and hydrogen in water provide a unique opportunity to evaluate hydrological processes and investigate their role in the variability of the climate system and its sensitivity to change. Water isotopes also form the basis of many paleoclimate proxies in a variety of archives, including ice cores, lake and marine sediments, corals, and speleothems. These records hold most of the available information about past hydrologic variability prior to instrumental observations. Water isotopes thus provide a ‘common currency’ that links paleoclimate archives to modern observations, allowing us to evaluate hydrologic processes and their effects on climate variability on a wide range of time and length scales. Building on previous literature summarizing advancements in water isotopic measurements and modeling and describe water isotopic applications for understanding hydrological processes, this topical review reflects on new insights about climate variability from isotopic studies. We highlight new work and opportunities to enhance our understanding and predictive skill and offer a set of recommendations to advance observational and model-based tools for climate research. Finally, we highlight opportunities to better constrain climate sensitivity and identify anthropogenically-driven hydrologic changes within the inherently noisy background of natural climate variability.