Gridded Input Parameters for a Stochastic Weather Generator, CLIGEN, in 10-km resolution of China
CLIGEN is a stochastic weather generator which was released in 1995 initially accompanied by the process-based soil erosion model Water Erosion Prediction Project (WEPP) by the United States Department of Agriculture. Detailed information about CLIGEN, and the programs and source code can be obtained from the following website:
https://www.ars.usda.gov/midwest-area/west-lafayette-in/national-soil-erosion-research/docs/wepp/cligen/
CLIGEN can simulate a series of long-term climate data in daily scale, including maximum and minimum temperatures, precipitation, solar radiation, dew point, wind velocity and direction. In addition, CLIGEN can generate three inter-storm variables in sub-daily scale, including storm duration, time to peak intensity (tp) and the ratio of the peak intensity to the average intensity (ip), from which an unlimited length of high-resolution breakpoint data can be generated. Of the ten CLIGEN-simulated weather elements, seven, namely daily maximum and minimum temperature, daily precipitation, duration, tp, ip, and daily solar radiation, are all that are required for predicting hydrological processes, soil erosion, and bio-production, and are considered to meet the minimum data requirements for WEPP if modeling wind-induced snow drift is not needed.
This dataset represents a set of gridded input parameters of CLIGEN for the mainland China, and each input file contains thirteen groups of input parameters related to the simulation of the temperature, solar radiation and precipitation. These parameters were firstly calculated based on long-term observed data, including daily temperature, daily precipitation and hourly precipitation obtained from 2405 stations and daily solar radiation obtained from 130 stations in China), and then regionalized to the mainland China in 10-km resolution by Universal Kriging. The quality of interpolated parameters has been fully assessed using the leave-one out cross-validation.
The gridded CLIGEN input files (updated April 21, 2021): Parfile
The excel sheet containing grid points information: Grid information
A brief data manual: Data manual
Suggested citation:
(article)
Wang, W., Yin, S., Yu, B., and Wang, S., CLIGEN parameter regionalization for mainland China, Earth Syst. Sci. Data, 13, 2945–2962, https://doi.org/10.5194/essd-13-2945-2021, 2021.
(dataset) Wang W., Yin S., Yu. B. and Wang S., CLIGEN Parameter Regionalization for Mainland China, http://doi.org/10.12275/bnu.clicia.CLIGEN.CN.gridinput.001, 2020.
Update history:
April 21, 2021 – Updated solar radiation mean value (SOL.RAD) print format. Data values are not changed.
中国大陆地区CLIGEN网格输入参数库
CLIGEN是天气发生器模型的一种，最早由美国农业部于1995年发布，是土壤水蚀过程模型WEPP的子部分，可为WEPP提供水蚀预报所需的气象因子。CLIGEN模型的详细信息见美国农业部网站：https://www.ars.usda.gov/midwest-area/west-lafayette-in/national-soil-erosion-research/docs/wepp/cligen/.
CLIGEN模型可模拟一系列日尺度的气象要素，包括日最高、最低气温，日降水量，太阳辐射，露点，风速和风向。此外，CLIGEN还可以模拟3个日以下尺度的降雨过程变量，包括降雨历时，到达峰值雨强的相对时间(tp)，峰值雨强与平均雨强的比值(ip)。基于CLIGEN模拟的3个降雨过程变量和所假设的双指数时程雨型曲线，可模拟生成雨日的降雨过程数据。在CLIGEN所能模拟的10个要素中，日最高、最低气温、日降水量、降雨历时、tp和ip、太阳辐射等7个要素可以满足WEPP模型对水蚀预报的基本需求，同时也能满足大部分水文、侵蚀、作物生长模型对气象要素的需求。
本数据库为网格数据库，包括CLIGEN随机模拟日最高气温和最低气温、日降雨及降雨过程、日太阳辐射所需要的13组输入参数。数据库覆盖中国大陆地区，空间分辨率为10km，每一个网格对应一个输入参数文件。首先基于2405个气象站的日最高、最低气温、日降水、小时降水数据和130个气象站的日太阳辐射数据计算得到站点参数值；进一步通过泛克里金插值方法分别将站点参数值区域化到整个中国大陆地区；最后，将每个图层中相同网格的参数值整合到一个CLIGEN输入参数文件中（.par文件），形成一套网格输入参数库。该数据库的精度已通过留一法交叉验证进行了充分的评估。
评估过程和结果详见参考文献：
Wang, W., Yin, S., Yu, B., and Wang, S., CLIGEN parameter regionalization for mainland China, Earth Syst. Sci. Data, 13, 2945–2962, https://doi.org/10.5194/essd-13-2945-2021, 2021.
(dataset) Wang W., Yin S., Yu. B. and Wang S., CLIGEN Parameter Regionalization for Mainland China, http://doi.org/10.12275/bnu.clicia.CLIGEN.CN.gridinput.001, 2020.
更新记录：
2021年4月21日 – 更新太阳辐射均值数据(SOL.RAD)输出格式，数值未作修改。