摘要
利用锡林郭勒盟2015-2019年每年10月至次年4月的15个基准气象站积雪深度数据,对2017年10月-2018年4月的积雪深度数据进行独立性检验,将内蒙古自治区陆面数据同化系统(Inner Mongolia land data assimilation system,IMLDAS)与国内的中国第一代全球陆面再分析数据集(CRA-40/Land)、国外的全球预报系统(global forecast system,GFS)以及气象站点数据(锡林郭勒盟15个气象站点的雪深数据)进行比较,对其进行性能评价,并对2015一2019年IMLDAS积雪深度格点数据进行检验订正。经过对比,三类数据的相关性、偏差以及标准差相差并不明显,IMLDAS积雪深度数据空间分辨率优于其他两类数据。经评估检验得出,当积雪深度在0~5cm时,IMLDAS数据能够较好地模拟积雪深度;当积雪深度≥5cm时,偏差会随着积雪深度的增加而增大。通过对IMLDAS积雪深度格点数据独立性检验分析发现,数据订正具有一定的作用,但个别气象站点还需要继续优化。
Using snow depth data from 15 benchmark meteorological observing stations in Xilin Gol League during October to April of the following year from 2015 to 2019,an independence test was conducted on the snow depth data from October 2017 to April 2018,and a performance evaluation was carried out by comparing the Inner Mongolia land data assimilation system(IMLDAS)data with domestic China's first generation global land surface reanalysis dataset(CRA 40/Land),foreign data(GFS data),and station observation data(snow depth data from 15 stations in Xilin Gol League).The gridded snow depth data of IMLDAS from 2015 to 2018 were tested and corrected.The results indicated that the three datasets showed no significant differences in correlations,biases,and standard deviations,while IMLDAS demonstrated superior spatial resolution in snow depth data.Additionally,the IMLDAS data could effectively simulate snow depths within 0~5 cm,but the bias would increase with the rise in snow depth when the snow depth exceeded 5 cm.The independence test of the gridded snow depth data of IMLDAS showed that the data correction had a certain effect,though further optimization was still required for individual stations.
作者
吴昊
郑琳
韩燕丽
宝音依如勒
WU Hao;ZHENG Lin;HAN Yanli;BAOYINYIRULE(Xilin Gol League Meteorological Bureau,Xilinhot O26000,China)
出处
《内蒙古气象》
2025年第6期24-30,共7页
Meteorology Journal of Inner Mongolia
基金
内蒙古自治区气象局科技创新项目(nmqxkjcx202421)
内蒙古自治区气象局科技创新项目(nmqxkjcx202411)共同资助。
关键词
陆面同化积雪深度
再分析资料
锡林郭勒盟
数据对比
Land surface assimilation of snow depth
Reanalysis data
Xilin Gol League
Data comparison
