叶子特征对植被光学特性的影响在地球系统建模中的影响
Yujie Wang1,2, Renato K Braghiere3,4, Woodward W Fischer3
1School of Earth and Space Sciences, University of Science and Technology of China, Hefei, 230026, Anhui, China. wyujie@ustc.edu.cn.
Nature communications
|May 28, 2025
概括
使用植物功能特征 (PFT) 的地球系统模型 (ESM) 与使用植物功能特征 (PFC) 的模型不同. 基于PFC的模型显示了白度和碳预算的显著变化,影响了气候预测.
科学领域:
- 地球系统科学 地球系统科学
- 气候建模气候模型
- 生态生态学 生态生态学
背景情况:
- 准确的气候预测依赖于量化表面能量和碳预算.
- 地球系统模型 (ESM) 传统上使用植物功能类型 (PFT),忽视了详细的植物功能特征 (PFC).
- 这种简化可能会导致气候模拟中的不准确性.
研究的目的:
- 研究在地球系统模型中使用植物功能特征 (PFC) 而不是植物功能类型 (PFT) 的影响.
- 为了量化模拟的叶子光学特性 (LOP) 和表面白度的差异.
- 评估对碳预算和土地-大气相互作用的影响.
主要方法:
- 配置了社区地球系统模型的树冠辐射转移方案与基于PFC的LOP.
- 基于PFC的LOP与基于PFT的传统方法的模拟结果进行比较.
- 分析了短波表面白度,碳沉积和陆地大气反机制的变化.
主要成果:
- 观察到模拟LOP和表面白度的实质差异,特别是在热带和北极森林.
- 基于PFC的配置导致了较低的热带和较高的北极白度 (超过5W m-2的辐射流差异).
- 模拟了一个较弱的热带和较强的北极碳汇,以及由于陆地与大气的合而改变的温度,云层和降水模式.
结论:
- 在ESM中超越传统的基于PFT的方法对于改善气候预测至关重要.
- 纳入PFC提供了更细致的陆地表面过程的表现.
- 这种精细化对于准确模拟地球气候动态和碳循环至关重要.
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