iTraCE

The CESM iTraCE project is a set of published simulations to understand the long-term, millennial-scale, deglacial climate evolution from 20 kyr ago to 11 kyr ago. The core experiment includes the evolving orbital conditions, ice sheets, greenhouse gases, and meltwater. The other experiments adopt a factorized forcing scheme to allow isolating each of these forcings separately. These experiments extend the publicly available TraCE simulations, available on the CDG and downloaded by the research community, using the higher resolution iCESM1.2 model that includes predictive simulation of water isotopes in the atmosphere-ocean-land-runoff-sea ice system. All simulations are performed with the atmosphere-ocean-land-sea ice coupled CESM1.2 at the nominal 2-degree latitude/longitude for the atmosphere and land models, and 1-degree for the ocean and sea ice models. The simulations contain climate stable water isotope output from all model components, plus carbon, neodymium, protactinium, and thorium isotopes in the ocean model output.

CESM iTraCE项目（CESM iTraCE project）是一套已发表的模拟实验集合，旨在解析距今2万年至1.1万年的千年尺度冰消期长期气候演化过程。其核心实验涵盖演化的轨道强迫条件、冰盖、温室气体以及融水强迫。其余实验采用分解强迫方案，以实现对各类强迫因子的单独分离与分析。本项目基于可从CDG获取并被科研社区下载的公开TraCE模拟实验（TraCE simulations），使用分辨率更高的iCESM1.2模型（iCESM1.2 model）进行拓展；该模型可对大气-海洋-陆地-径流-海冰系统中的水体同位素开展预测性模拟。所有模拟实验均采用耦合了大气、海洋、陆地与海冰模块的CESM1.2模型运行：其中大气与陆地模型的标称分辨率为2度经纬度，海洋与海冰模型的标称分辨率为1度经纬度。本次模拟产出的数据涵盖所有模型组分输出的气候态稳定水体同位素结果，以及海洋模型输出的碳、钕、镤与钍同位素数据。

搜集汇总

背景与挑战

背景概述

iTraCE数据集是CESM项目的一部分，专注于模拟从20,000年前到11,000年前的千年尺度气候演化过程，使用高分辨率iCESM1.2模型，包含水同位素和碳、钕等海洋同位素输出。数据集提供网格格式的netCDF文件，总容量达165.25 TB，涵盖大气、海洋、陆地等多个组件变量，如潜热通量、降雨和海平面压力，由UCAR/NCAR/CGD实验室贡献，并支持相关气候研究。