Heterogeneous slab thermal dehydration driving warm subduction zone earthquakes

The data includes the three-dimensional temperature field (degrees Celsius), water content (wt%), dehydration rate (wt%/km), rock phase change distribution, and subduction velocity field (cm/yr) of the subducting plate, as well as the coastline and volcano distribution. The data coordinates are an orthogonal coordinate system, where the origin of the coordinates is (166.3E, 16.4S).The data of the model region have dimensions of 1200×500×400 km (length×width×depth). The geometry of the subducted plate is well constrained by Slab2.0, and the plate ages are provided by EarthByte. The temperature boundary condition agrees with the plate cooling model. The bottom of the slab and the perpendicular plane are prescribed as adiabatic and permeable, and the top surface is set to a fixed temperature (0°C) and is rigid. The data was acquired through 3-D numerical thermal modeling which was developed from originally code stag3d. An anelastic liquid approximation and the equations of conservation of mass, momentum, and energy are used in this model. Based on a three-dimensional thermomechanical model and the collect earthquake catalog from IRIS, the data of the slab thermal state, water content, and slab dehydration distribution in Vanuatu are calculated. The geophysical calculation is ensured after the subduction thermal regime reaches a steady state. The temperature field error range is ±50 degrees Celsius, and the velocity field error range is ±0.1cm/ yr. This data can be further used analyzing the geophysical field of subduction zone.本数据集包含俯冲板块的三维温度场（单位：摄氏度）、含水量（重量百分比，wt%）、脱水速率（wt%/km）、岩相变化分布，以及俯冲速度场（单位：厘米每年，cm/yr）和海岸线与火山分布。数据采用正交坐标系，坐标原点为(166.3°E，16.4°S)。模型区域的尺寸为1200×500×400 km（长×宽×深）。俯冲板块的几何形态由Slab2.0得到良好约束，板块年龄由EarthByte提供。温度边界条件与板块冷却模型相一致。板块底部及垂直平面被设定为绝热且透水，顶面则设置为固定温度（0°C）且刚性固定。本数据通过基于原始代码stag3d开发的三维数值热模拟获取。模型采用非弹性流体近似以及质量、动量与能量守恒方程。本数据集基于三维热力学模型，并整合了IRIS收录的地震目录，计算得到瓦努阿图地区俯冲板块的热状态、含水量及脱水分布数据。待俯冲热系统达到稳态后开展地球物理计算。温度场的误差范围为±50摄氏度，速度场的误差范围为±0.1 cm/yr。本数据集可进一步用于俯冲带地球物理场的相关分析。