基于静止卫星和再分析资料的中国区域大气驱动数据集（2005-2010）

基于静止卫星和再分析资料的中国区域大气驱动数据集是由中国气象局制备的一套具有较高时空分辨率的大气驱动数据集，空间分辨率为0.1°×0.1°，时间分辨率为1小时，覆盖范围为东经75°-135°，北纬15°-55°，包含近地面气温、相对湿度、地面气压、近地面风速、地表入射太阳辐射和地面降水率6个要素。其中降水产品的制备过程如下：利用中国风云二号静止卫星多通道数据所反演的6小时累积降水估计与常规地面观测6小时累积降水进行数据融合，获得6小时累积降水空间分布数据，然后利用静止卫星多通道反演的高分辨率云分类信息确定累积降水时间插值权重，得到1小时累积降水估计。辐射资料的制备过程如下：基于FY-2C的地表入射太阳辐射采用辐射传输模型DISORT(Discrete Ordinates Radiative Transfer Program for a Multi-Layered Plane-parallel Medium)进行辐射传输计算，获得逐小时0.1°×0.1°的中国区域地表入射太阳辐射数据。其他要素的制备过程：对1.0°×1.0°的NCEP再分析资料采用空间和时间插值方法，获得逐小时0.1°×0.1°的近地面气温、相对湿度、地面气压、近地面风速等驱动要素。 各变量的物理意义： 气象要素 || 变量名 || 单位 || 物理意义 | 地面气温 || TBOT || K || 近地面（2m）气温 | 地表气压 || PSRF || Pa || 地表气压 | 地面相对湿度 || RH || kg/ kg ||近地面(2m)相对湿度 | 地面风速 || WIND || m /s ||近地面（风速仪高度）风速 | 地表入射太阳辐射|| FSDS || W /m2 || 地表入射太阳辐射 | 降水率||PRECTmms||mm/hr || 降水率 更多信息，请参见随数据一同发布的数据文档。The Chinese regional atmospheric forcing dataset based on geostationary satellites and reanalysis data is a high spatiotemporal resolution atmospheric forcing dataset developed by the China Meteorological Administration. Its spatial resolution is 0.1°×0.1°, temporal resolution is 1 hour, and the coverage range is 75°E–135°E, 15°N–55°N. It includes six variables: near-surface air temperature, relative humidity, surface air pressure, near-surface wind speed, surface incident solar radiation, and surface precipitation rate. The preparation process of the precipitation product is as follows: The 6-hour cumulative precipitation estimates retrieved from multi-channel data of China's Fengyun-2 (FY-2) geostationary satellites are fused with the 6-hour cumulative precipitation from conventional ground observations to obtain spatial distribution data of 6-hour cumulative precipitation. Then, the high-resolution cloud classification information retrieved from geostationary satellite multi-channel data is used to determine the temporal interpolation weights of cumulative precipitation, thereby generating 1-hour cumulative precipitation estimates. The preparation process of radiation data is as follows: The surface incident solar radiation based on FY-2C is calculated using the radiative transfer model DISORT (Discrete Ordinates Radiative Transfer Program for a Multi-Layered Plane-parallel Medium) to obtain hourly 0.1°×0.1° surface incident solar radiation data over the Chinese region. For the preparation of other variables: Spatial and temporal interpolation methods are applied to the 1.0°×1.0° NCEP reanalysis data to obtain hourly 0.1°×0.1° forcing variables including near-surface air temperature, relative humidity, surface air pressure, and near-surface wind speed. Physical meanings of each variable: | Meteorological Element | Variable Name | Unit | Physical Meaning | |------------------------|---------------|------|------------------| | Near-surface air temperature | TBOT | K | Near-surface (2m) air temperature | | Surface air pressure | PSRF | Pa | Surface air pressure | | Near-surface relative humidity | RH | kg/kg | Near-surface (2m) relative humidity | | Near-surface wind speed | WIND | m/s | Near-surface wind speed (at anemometer height) | | Surface incident solar radiation | FSDS | W/m² | Surface incident solar radiation | | Precipitation rate | PRECTmms | mm/hr | Precipitation rate | For more information, please refer to the data documentation released along with the dataset.