Skill of isotope-enabled climate models for daily surface water vapour in East Asia

IF 4 1区地球科学 Q1 GEOGRAPHY, PHYSICAL

Global and Planetary Change Pub Date : 2024-06-27 DOI:10.1016/j.gloplacha.2024.104502

Shengjie Wang , Yuqing Qian , Kei Yoshimura , Hayoung Bong , Camille Risi , Zhongwang Wei , Hongxi Pang , Wei Xiao , Shijun Lei , Meng Xing , Pei Zhao , Huawu Wu , Yudong Shi , Di Wang , Mingjun Zhang

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引用次数: 0

Abstract

The isotope-enabled general circulation models (GCM) have been widely applied to simulate the variability of stable isotopes in meteoric water at various time scales. The in-situ observations of water vapour isotopes are an important basis for assessing the performance of isotope-enabled GCMs, although they are still limited. Here we compiled the observations of near-surface water vapour isotopes on a daily scale at 17 stations in East Asia, and assessed the skill and the association between isotope error and meteorological errors on a daily scale. Generally, the spatial pattern and seasonal variability can be well simulated in the isotope-enabled GCMs. The models show better skill for warm and humid backgrounds, which also corresponds to the monsoonal regions with lower latitudes in East Asia. As spatial resolution is finer, the skill of models is better, which can be seen from the two GCMs. According to the correlation coefficient, the improvement of resolution is more obvious in summer than in winter, especially for IsoGSM. In addition, the correlation coefficient in winter is usually larger than that in summer. The daily modelling has good potential to investigate the daily or synoptic climate information in water isotopes. The findings are useful for understanding the applicability of isotope-enabled models in East Asia and the climate factors influencing the skill of isotope-enabled models on a daily basis.

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同位素气候模式对东亚日表面水蒸气的影响

支持同位素的大气环流模式（GCM）已被广泛应用于模拟不同时间尺度下陨水中稳定同位素的变化。水蒸气同位素的原位观测数据是评估同位素支持的 GCM 性能的重要依据，尽管这些数据仍然有限。在此，我们汇编了东亚 17 个站点的近地表水汽同位素日观测资料，并评估了日尺度上同位素误差与气象误差之间的技能和关联。一般来说，支持同位素的 GCM 可以很好地模拟空间模式和季节变化。模型在暖湿背景下表现出更好的技能，这也与东亚低纬度季风区相对应。空间分辨率越高，模式的技能就越好，这一点可以从两个 GCM 中看出来。从相关系数来看，夏季分辨率的提高比冬季明显，尤其是 IsoGSM。此外，冬季的相关系数通常大于夏季。日模拟在研究水同位素的日气候或同步气候信息方面具有良好的潜力。研究结果有助于了解同位素模式在东亚地区的适用性，以及影响同位素模式日功能的气候因素。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Global and Planetary Change 地学天文-地球科学综合

CiteScore

7.40

自引率

10.30%

发文量

226

审稿时长

63 days

期刊介绍： The objective of the journal Global and Planetary Change is to provide a multi-disciplinary overview of the processes taking place in the Earth System and involved in planetary change over time. The journal focuses on records of the past and current state of the earth system, and future scenarios , and their link to global environmental change. Regional or process-oriented studies are welcome if they discuss global implications. Topics include, but are not limited to, changes in the dynamics and composition of the atmosphere, oceans and cryosphere, as well as climate change, sea level variation, observations/modelling of Earth processes from deep to (near-)surface and their coupling, global ecology, biogeography and the resilience/thresholds in ecosystems. Key criteria for the consideration of manuscripts are (a) the relevance for the global scientific community and/or (b) the wider implications for global scale problems, preferably combined with (c) having a significance beyond a single discipline. A clear focus on key processes associated with planetary scale change is strongly encouraged. Manuscripts can be submitted as either research contributions or as a review article. Every effort should be made towards the presentation of research outcomes in an understandable way for a broad readership.