Model Output from the Marine Biology Laboratory General Ecosystem Model (MBL-GEM) for Toolik Lake, 1921-2144, and the Kuparuk River Basin, 1995

This data set contains model input and output data for four simulations of varying time periods and spatial coverage. The first two simulations are for acidic tussock tundra in the Toolik Lake region of the Kuparuk River watershed for the years 1921 to 2144. Each of these simulations is made up of two parts. The first part is based upon a reconstruction of historical climate variables from 1921 to 1995, while the second part is based upon a doubling of C02 and the concurrent changes in temperature, soil moisture, and irradiance from 1996 to 2144. The historical period is the same for both simulations. The future period differs between the two simulations: One simulation assumes a direct relationship between soil moisture and temperature (i.e., warmer and wetter), and the other assumes an inverse relationship between soil moisture and temperature (i.e., warmer and drier). The climate drivers used for the simulations are included as part of this dataset. The second two simulations are for acidic tussock tundra throughout the entire Kuparuk River basin for 1995 only. The first simulation uses the reconstructed 1995 climate. The second simulation uses the same climate with an increase in soil moisture. The model output data consist of 34 variables including photosynthesis, plant and soil respiration, net primary production, net mineralization, and carbon and nitrogen stocks in plant tissues and soils.

本数据集包含4组不同时段与空间覆盖范围的模拟模型输入输出数据。前两组模拟针对库帕鲁克河流域（Kuparuk River watershed）图利克湖（Toolik Lake）区域的酸性草丛冻土（acidic tussock tundra），模拟时段为1921年至2144年。每组模拟均由两个部分构成：第一部分基于1921年至1995年的历史气候变量重建结果，第二部分则基于1996年至2144年的CO₂倍增及伴随的温度、土壤湿度与辐照度（irradiance）变化。两组模拟的历史时段完全一致，但未来时段的设置存在差异：其中一组假设土壤湿度与温度呈正相关关系（即暖湿化情景），另一组则假设二者呈负相关关系（即暖干化情景）。本数据集包含模拟所用的全部气候驱动因子数据。后两组模拟仅针对1995年单一年份，覆盖范围为整个库帕鲁克河流域的酸性草丛冻土。第一组模拟采用重建得到的1995年气候数据，第二组模拟则在相同气候背景下提升土壤湿度。模型输出数据涵盖34项变量，包括光合作用、植物与土壤呼吸、净初级生产力、净矿化作用，以及植物组织与土壤中的碳、氮储量。