沙漠与绿洲气象2017，Vol.11Issue(1)：67-75,9.DOI:10.12057/j.issn.1002-0799.2017.01.009
不同初始场及其扰动对WRF模拟暴雨的影响
Effects of Different Initial Fields and Initial Perturbations on Simulation of a Heavy Rainfall by WRF
摘要
Abstract
A typical heavy rainfall process occurred during 12-13 July 2013 in the north of China was simulated using the meso -scale model WRF V3.6. Two groups of contrast numerical experiments were conducted to investigate the sensitivity of model prediction results to initial fields provided by the ERA-Interim and FNL data, respectively. The results show that:(1)there is a significant difference between the initial field of the ERA-Interim and FNL data at the sub-synoptic scale, thus leading to different simulation results. The simulated precipitation from the ERA-Interim data is better than that of the FNL data.(2)For 24-hour area precipitation forecast, the perturbation in humidity field has the greatest impact on precipitation, closely followed by that is wind and temperature field, the lateral boundary perturbation has the least impact.(3)The root mean square error(RMSE)of precipitation caused by humidity field perturbation is larger than that caused by the other initial perturbations. In the first 20 hours of the integration period, the RMSE of precipitation caused by wind field perturbation is larger than that caused by temperature field perturbation, while the opposite occurs in the integration period of 21~24 h. The precipitation RMSE caused by lateral boundary perturbation is small in the early stage, and the growth is slow. After a period of model integration, the RMSE of precipitation caused by lateral boundary perturbation is equivalent to that caused by the initial field perturbation of single meteorological variables.关键词
WRF/暴雨/初始场/初值扰动/侧边界扰动Key words
WRF/heavy rainfall/initial field/initial perturbation/lateral boundary perturbation分类
天文与地球科学引用本文复制引用
袁有林,杨秀洪,杨必华,赵军,周开鹏,张广兴..不同初始场及其扰动对WRF模拟暴雨的影响[J].沙漠与绿洲气象,2017,11(1):67-75,9.基金项目
国家自然科学基金面上项目(41375070和41075050)资助. （41375070和41075050）
