Supplement to "Climate policies for carbon neutrality should not rely on the uncertain increase of carbon storage in existing forests"

Supplementary data to "Climate policies for carbon neutrality should not rely on the uncertain increase of carbon storage in existing forests"This dataset contains data on potential biomass at global scale at 10 km resolution under current and future climate scenarios, discussed in the paper <i>Climate policies for carbon neutrality should not rely on the uncertain increase of carbon storage in existing forests</i>. In the paper we make the distinction between potential realised biomass, i.e. the maximum biomass expected under given environmental conditions (climate, topography and soil), and biomass carrying capacity, which is potential biomass adjusted for naturally occurring disturbance regimes. For details, see the material and methods section of the paper.This dataset provides potential realised biomass (PRB) and natural disturbance regimes (DR) for current (1970-2000) and future climate conditions (2081-2100), with 3 future climate scenarios (SSP1-2.6, SSP2-4.5 and SSP3-7.0) with the future climate being derived by 23 Earth system models. The climate data is sourced from the WorldClim V2.1 dataset¹. The dataset presented here reports the same climate models, and a subset of the periods and scenarios.The filenames in this repository are created in the following way:<i>current climate</i>:{variable}_current_climate.tif<i>future climate</i>:{variable}_{climate model}_{climate scenario}_{climate period}.tifBiomass carrying capacity can be calculated with the following formula. For more details and a description on how to derive the CO₂ fertilization parameter (F_CO₂) we refer to the methods section in the paper.BCC = PRB * (1 - DR) * F_CO₂Climate modelsSee https://www.worldclim.org/data/cmip6/cmip6climate.htmlClimate scenariosSSP1–2.6: Sustainability. Low GHG emissions: CO₂ emissions cut to net zero around 2075SSP2–4.5: Middle of the road. Intermediate GHG emissions: CO₂ emissions around current levels until 2050, then falling but not reaching net zero by 2100SSP3–7.0: Regional rivalry. High GHG emissions: CO₂ emissions double by 2100Climate periodsOne period of the WorldClim V2.1 dataset is used: 2081-2100.References1. Fick, S. E. and Hijmans, R. J.: WorldClim 2: new 1-km spatial resolution climate surfaces forglobal land areas, International Journal of Climatology, 37, 4302–4315, https://doi.org/10.1002/joc.5086, 2017.<br>

本数据集为论文《碳中和气候政策不应依赖现有森林碳储量的不确定性增长（Climate policies for carbon neutrality should not rely on the uncertain increase of carbon storage in existing forests）》的补充数据。本数据集包含该论文中讨论的、当前及未来气候情景下全球尺度、分辨率为10公里的潜在生物量数据。
在本研究中，我们明确区分了**潜在实现生物量（potential realised biomass）**与**生物量承载能力**：前者指在既定环境条件（气候、地形与土壤）下的理论最大生物量；后者则是经自然干扰制度（disturbance regimes）校正后的潜在生物量。详细信息请参见论文的材料与方法章节。
本数据集提供了当前（1970-2000年）及未来（2081-2100年）气候条件下的潜在实现生物量（PRB）与自然干扰制度（DR）数据，共包含3种未来气候情景：共享社会经济路径（Shared Socioeconomic Pathways, SSP）1-2.6、SSP2-4.5及SSP3-7.0，未来气候数据由23个地球系统模型（Earth system models）推导得出。气候数据源自WorldClim V2.1数据集¹。本数据集采用了相同的气候模型，并选取了部分时段与情景进行分析。
本仓库中的文件命名规则如下：
<i>当前气候</i>：{variable}_current_climate.tif
<i>未来气候</i>：{variable}_{climate model}_{climate scenario}_{climate period}.tif
生物量承载能力可通过以下公式计算。关于二氧化碳施肥参数（F_CO₂）的推导细节与说明，请参见论文的方法章节。
BCC = PRB × (1 - DR) × F_CO₂
气候模型详情请参见：https://www.worldclim.org/data/cmip6/cmip6climate.html
### 气候情景
SSP1-2.6：可持续发展路径。温室气体（Greenhouse Gas, GHG）排放水平较低：二氧化碳排放量将于2075年左右降至净零排放。
SSP2-4.5：中间路径。温室气体排放水平中等：二氧化碳排放量将维持在当前水平至2050年，之后逐步下降，但到2100年仍未达到净零排放。
SSP3-7.0：区域竞争路径。温室气体排放水平较高：到2100年二氧化碳排放量将翻倍。
### 气候时段
本数据集采用WorldClim V2.1数据集的2081-2100年时段。
### 参考文献
1. Fick, S. E. 与 Hijmans, R. J.：《WorldClim 2：用于全球陆地区域的新型1公里空间分辨率气候表面》，《国际气候学杂志》，37卷，4302–4315页，https://doi.org/10.1002/joc.5086，2017年。