Influence of mountain orientation on precipitation isotopes in the westerly belt of Eurasia

IF 4 1区地球科学 Q1 GEOGRAPHY, PHYSICAL Global and Planetary Change Pub Date : 2024-08-13 DOI:10.1016/j.gloplacha.2024.104543

Longhu Chen , Guofeng Zhu , Qin Qin Wang , Linlin Ye , Xinrui Lin , Siyu Lu , Yinying Jiao , Rui Li , Gaojia Meng , Yuhao Wang , Jiangwei Yang , Chen Jia

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Abstract

Mountains have a significant impact on the transport path of water vapour and local meteorological variations. Therefore, understanding the influence mechanism of mountains on stable isotopes of precipitation is essential. In this study, we analyzed the precipitation stable isotope data within the Westerlies in the Eurasian continent. The results indicate the following: (1) East-west-oriented mountain ranges and plains play a “channelling role” in facilitating the inland penetration of westerly moisture, with this effect being more pronounced in the northern part of the Alps. Conversely, north-south-oriented mountain ranges and plateaus act as a “barrier” to westerly moisture. (2) Mountains influence stable isotopes of precipitation primarily by altering the water vapour movement paths and regulating local meteorological factors. (3) The “altitude effect” is the most common mechanism through which mountains affect local meteorological elements reflected in stable isotopes of precipitation. Furthermore, we anticipate that with global climate warming, the interaction and feedback between mountains and climate will become even more complex. This aspect deserves consideration in future research.

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山脉走向对欧亚大陆西带降水同位素的影响

山脉对水蒸气的传输路径和当地的气象变化有重大影响。因此，了解山脉对降水稳定同位素的影响机制至关重要。本研究分析了欧亚大陆西风带内的降水稳定同位素数据。结果表明(1) 东西走向的山脉和平原在促进西风水汽向内陆渗透方面起着 "渠化作用"，这种作用在阿尔卑斯山北部更为明显。相反，南北走向的山脉和高原则是西风水汽的 "屏障"。(2) 山脉对降水稳定同位素的影响主要是通过改变水汽移动路径和调节当地气象要素来实现的。(3）"海拔效应 "是山脉影响降水稳定同位素所反映的当地气象要素的最常见机制。此外，我们预计随着全球气候变暖，山脉与气候之间的相互作用和反馈将变得更加复杂。这方面的问题值得在今后的研究中加以考虑。

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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.