Processed model output of the climate simulation in the study: The effects of diachronous surface uplift of the European Alps on regional climate and the isotopic composition of precipitation (δ18Op) [Boateng et al.]

<strong>The geodynamic evolution of the Alps suggests that the Alps did not rise monotonically due to the different post-collisional processes such as slab break-off. However, understanding such subsurface dynamics would require adequate knowledge about its surface uplift history. Stable isotope paleoaltimetry methods are widely used to infer past surface elevation using geologic archives. However, its accurate interpretation relies on attributing the extracted isotopic signal from proxies to surface uplift despite other influences such as climate. To resolve this issue, topographic sensitivity experiments across the Alps are used to investigate the impacts of the diachronous surface uplift on regional climate and δ18Op. The Atmospheric General Circulation Model ECHAM5 with water isotope tracking capabilities (ECHAM5-wiso) is used to simulate the climate with varied topographic scenarios. We present the processed (long-term means) model output of the relevant climate variables (i.e δ18Op, near-surface temperature, precipitation amount, near-surface meridional and zonal winds, mean sea level pressure, and elevation) in response to the changes in topography. The file names are representative of the topographic scenarios used for the simulations. For example, the file “W2E1.nc” is the model output produced by a topographic scenario in which the topography across the west-central Alps was set to 200% of its modern height, and the Eastern Alps were kept at 100%. The “CTL.nc” file contains model output from the control simulation that uses present-day topography. The datasets for instance can be used to select far-field sampling points for the δ-δ paleoaltimetry method that are not significantly affected by the topographic changes.</strong>阿尔卑斯山的地球动力学演化研究表明，受板片断落等多种碰撞后构造过程影响，阿尔卑斯山并非经历单调隆升。然而，要厘清这类地下动力学机制，需先充分掌握其地表抬升的演化历史。稳定同位素古高程法（stable isotope paleoaltimetry）可通过地质档案反演古地表高程，是当前常用的研究手段。但该方法的精准解译，需将代用指标提取的同位素信号归因于地表抬升，同时排除气候等其他因素的干扰。为解决这一难题，研究团队针对阿尔卑斯山开展了一系列地形敏感性试验，以探究穿时地表抬升对区域气候及大气降水氧同位素比值（δ¹⁸O_p）的影响。本研究采用具备水同位素追踪功能的大气环流模式ECHAM5（ECHAM5-wiso），对不同地形情景下的气候过程进行数值模拟。本文提供经处理后的长期平均气候变量模型输出结果，相关变量包括大气降水氧同位素比值、近地表气温、降水量、近地表经向与纬向风速、平均海平面气压及地形高程，所有结果均响应于地形条件变化。数据集的文件名可直观反映模拟所用的地形情景。例如，文件"W2E1.nc"对应的地形情景为：阿尔卑斯山西中部地区的地形抬升至现代高度的200%，而东阿尔卑斯山维持现代高度不变。"CTL.nc"文件则包含采用现代地形开展的对照模拟所得的模型输出结果。本数据集可应用于为δ-δ古高程法筛选受地形变化影响不显著的远场采样点等相关研究场景。