Process-explicit simulations of human migration in North America 19,000 years ago to present

We simulated the peopling of North America from 19,000 years BP to present using the Climate-Informed Genetic Model. We used a set of 4,950 values for the demographic parameters of the model, based on a previous optimization of these parameters on genetic data. We ran these simulations twice: once parametrised with the HadCM3 palaeoclimate model, and once with the TraCE-21ka palaeoclimate simulation. Here we provide the median and MAD (median absolute deviation) of human abundance in North America, averaged across each set of simulations based on the HadCM3 and TraCE-21ka palaeoclimate models. These are provided as GeoTIFF files in standard longitude-latitude WGS84 projection. The extent is North America (170W to 49W, 15N to 90N) at a spatial resolution of 1 degree by 1 degree. The timescale is from 19,000 years ago to present at a temporal resolution of 25 years.本研究采用气候关联遗传模型（Climate-Informed Genetic Model），模拟了距今19000年至今北美大陆的人类拓殖过程。本研究基于既往基于遗传数据对模型人口参数的优化结果，为该模型设置了共计4950组人口参数取值。本研究共开展两轮模拟：一轮采用HadCM3古气候模型进行参数化配置，另一轮采用TraCE-21ka古气候模拟方案进行参数化配置。 本文提供了基于上述两类古气候模型的各模拟集合的平均结果，即北美大陆人类种群丰度的中位数与MAD（中位数绝对偏差，median absolute deviation）。上述结果以GeoTIFF文件格式存储，采用标准经纬度WGS84坐标系。数据集的空间覆盖范围为北美大陆，坐标范围为西经170°至西经49°、北纬15°至北纬90°，空间分辨率为1°×1°。时间跨度为距今19000年至现今，时间分辨率为25年。