| Application of ERA5 Reanalysis to the Construction of Initial Conditions for WACCM Simulations |
| |
| 作者姓名： | WANG Yegui JING Wenqi CUI Yuanyuan CAI Qifa LAN Weiren FANG Hanxian WENG Libin NIU Jun |
| |
| 作者单位： | 1. College of Meteorology and Oceanography, National University of Defense Technology, Nanjing 211101; |
| |
| 基金项目： | Supported by the National Natural Science Foundation of China (41375105) |
| |
| 摘 要： | This study uses ECMWF fifth-generation reanalysis, ERA5, which extends to the mesopause, to construct the Initial Conditions (IC) for WACCM (Whole Atmosphere Community Climate Model) simulations. Because the biases between ERA5 and Sounding of the Atmosphere using Broadband Emission Radiometry (SABER) temperature data are within ±5 K below the lower mesosphere, ERA5 reanalysis is used to construct IC in the lower atmosphere. Four experiments are performed to simulate a Stratospheric Sudden Warming (SSW) event from 5 to 15 February 2016. The simulation using the WACCM default climatic IC cannot represent the sharp meteorological variation during SSW. In contrast, the 0~4 d forecast results driven by ERA5-constructed IC is consistent with ERA5 reanalysis below the middle mesosphere. Comparing with WACCM climatology ICs scheme, the ICs constructing method based on ERA5 reanalysis can obtain 67%, 40%, 22%, 4% and 6% reduction of temperature forecast RMSE at 10 hPa, 1 hPa, 0.1 hPa, 0.01 hPa and 0.001 hPa respectively. However, such improvement is not shown in the lower thermosphere.
|
| 关 键 词： | ERA5 reanalysis SABER WACCM Initial Condition Stratospheric Sudden Warming (SSW) |
| 收稿时间： | 2017-07-10 |
Application of ERA5 Reanalysis to the Construction of Initial Conditions for WACCM Simulations |
| |
| WANG Yegui,JING Wenqi,CUI Yuanyuan,CAI Qifa,LAN Weiren,FANG Hanxian,WENG Libin,NIU Jun.Application of ERA5 Reanalysis to the Construction of Initial Conditions for WACCM Simulations[J].Chinese Journal of Space Science,2018,38(4):460-468. |
| |
| Authors: | WANG Yegui JING Wenqi CUI Yuanyuan CAI Qifa LAN Weiren FANG Hanxian WENG Libin NIU Jun |
| |
| Institution: | 1. College of Meteorology and Oceanography, National University of Defense Technology, Nanjing 211101;2. Institute of Atmospheric Physics, Chinese Academy of Science, Beijing 100029;3. Meteorological Observatory of 94758 Troops, Ningde 355103;4. Hebei Meteorological Observatory, Shijiazhuang 050021 |
| |
| Abstract: | This study uses ECMWF fifth-generation reanalysis, ERA5, which extends to the mesopause, to construct the Initial Conditions (IC) for WACCM (Whole Atmosphere Community Climate Model) simulations. Because the biases between ERA5 and Sounding of the Atmosphere using Broadband Emission Radiometry (SABER) temperature data are within ±5 K below the lower mesosphere, ERA5 reanalysis is used to construct IC in the lower atmosphere. Four experiments are performed to simulate a Stratospheric Sudden Warming (SSW) event from 5 to 15 February 2016. The simulation using the WACCM default climatic IC cannot represent the sharp meteorological variation during SSW. In contrast, the 0~4 d forecast results driven by ERA5-constructed IC is consistent with ERA5 reanalysis below the middle mesosphere. Comparing with WACCM climatology ICs scheme, the ICs constructing method based on ERA5 reanalysis can obtain 67%, 40%, 22%, 4% and 6% reduction of temperature forecast RMSE at 10 hPa, 1 hPa, 0.1 hPa, 0.01 hPa and 0.001 hPa respectively. However, such improvement is not shown in the lower thermosphere. |
| |
| Keywords: | |
| 本文献已被 CNKI 等数据库收录！ |
| 点击此处可从《空间科学学报》浏览原始摘要信息 |
| 点击此处可从《空间科学学报》下载免费的PDF全文 |
|
