CLM land-only release (using CLM4.0, 4.5, 5.0)

These data are from a series of simulations documenting model developments that have been included in Community Land Model version 5 (CLM5) which is the default land component for the Community Earth System Model version 2 (CESM2). These data were generated to compare CLM5 to prior versions of CLM (CLM4 and CLM4.5) in land-only mode forced with several historical forcing datasets including GSWP3v1, CRUNCEPv7, and WATCH. Data include simulations with LAI prescribed from satellite phenology (SP) and simulations with prognostic vegetation state and active biogeochemistry (BGC). All simulations were completed at a resolution of 0.9 degrees latitude by 1.25 degrees longitude. Additional simulations were conducted to evaluate model sensitivities to land use and land cover change, active crop management, elevated concentrations of atmospheric CO2, and nitrogen enrichment. Raw data were post processed to generate single variable time series. In addition to standard monthly output, these data also include PFT-level, daily, and hourly data available for selected fields and simulations. Additional analyses were made using the CLM diagnostics package and International Land Model Benchmarking (ILAMB) package and available at the linked web sites.

本数据集源自一系列模拟实验，用于记录已纳入第5版通用陆面模型（Community Land Model version 5, CLM5）的模型开发进展；CLM5是第2版通用地球系统模型（Community Earth System Model version 2, CESM2）的默认陆面组件。
本次生成数据的核心目的，是在纯陆面模式下对比CLM5与此前的CLM版本（CLM4及CLM4.5），实验采用包括GSWP3v1、CRUNCEPv7及WATCH在内的多套历史强迫数据集驱动模型。
数据集包含两类模拟实验：一类是基于卫星物候（SP）指定叶面积指数（Leaf Area Index, LAI）的模拟，另一类是采用预报式植被状态与活跃生物地球化学（BGC）模块的模拟。
所有模拟实验均采用0.9°纬度×1.25°经度的空间分辨率完成。
此外还开展了额外模拟实验，用于评估模型对土地利用/土地覆盖变化、主动作物管理、大气CO₂浓度升高以及氮富集的敏感性。
原始数据经过后处理，生成单变量时间序列数据集。
除标准的月度输出数据外，本数据集还包含针对特定变量与模拟实验的植物功能型（Plant Functional Type, PFT）分级数据、日尺度数据及小时尺度数据。
研究团队还使用CLM诊断工具包与国际陆面模型基准测试（International Land Model Benchmarking, ILAMB）工具包开展了额外分析，相关结果可通过关联网站获取。

搜集汇总

背景与挑战

背景概述

该数据集是CLM5（社区土地模型版本5）的陆地模式发布数据，用于比较CLM5与CLM4和CLM4.5版本，通过历史强迫数据集（如GSWP3v1）在0.9x1.25度分辨率下模拟1850年至2014年的陆地过程。数据包括降雨变量，以netCDF格式提供，总容量达7.12 TB，支持卫星物候和生物地球化学模拟，适用于气候和陆地系统研究。