利用ERA5再分析资料、乌鲁木齐机场微波辐射计资料、机场报文分析2021年7月30日~31日乌鲁木齐机场降雨天气形势。结果表明:1) 此次降水天气受乌拉尔山大槽东移南下影响产生,槽后北风带强,持续有冷空气补充;槽前西南气流强盛,为降水提供...利用ERA5再分析资料、乌鲁木齐机场微波辐射计资料、机场报文分析2021年7月30日~31日乌鲁木齐机场降雨天气形势。结果表明:1) 此次降水天气受乌拉尔山大槽东移南下影响产生,槽后北风带强,持续有冷空气补充;槽前西南气流强盛,为降水提供充足的水汽;高空槽移动速度缓慢,为新疆地区带来了较长时间的持续降雨。2) 低层辐合上升、中层辐散下沉的配置为降水提供了动力条件;相对湿度大值区持续时间长,为机场持续性降水提供了良好的水汽条件。3) 微波辐射计可以较好的展现机场上空垂直方向上水汽的时间变化特征。The rain weather situation of Urumqi Airport from July 30 to 31, 2021 was analyzed by using ERA5 reanalysis data, microwave radiometer data of Urumqi Airport and airport messages. The results show that: 1) the precipitation was influenced by the eastward and southward movement of the Great Ural Trough, and the north wind belt behind the trough was strong and cold air continued to supplement. The southwest airflow in front of the trough is strong, which provides sufficient water vapor for precipitation. The trough moved slowly, bringing a long period of continuous rainfall to Xinjiang. 2) The configuration of convergence rising in low layer and divergence sinking in middle layer provided dynamic conditions for precipitation. The relative humidity high value area lasts for a long time, which provides good water vapor conditions for the continuous precipitation at the airport. 3) The microwave radiometer can better display the temporal variation characteristics of water vapor in the vertical direction over the airport.展开更多
利用风云四号A星TBB资料、AWOS系统降水资料、微波辐射计资料及多普勒天气雷达资料对2023年1月11日~13日乌鲁木齐机场一次高影响降雪天气进行研究。结果表明:1) TBB值的变化对降雪天气的短时临近预报有较好的指示意义,降雪前TBB值骤降...利用风云四号A星TBB资料、AWOS系统降水资料、微波辐射计资料及多普勒天气雷达资料对2023年1月11日~13日乌鲁木齐机场一次高影响降雪天气进行研究。结果表明:1) TBB值的变化对降雪天气的短时临近预报有较好的指示意义,降雪前TBB值骤降预示着降雪的开始,在降雪过程中,TBB值减小对应降雪强度加强,二TBB值骤增则预示着降雪将结束。2) 雷达回波整体连续,中心范围增大,强度增强时,降水明显上升,并稳定维持;回波减弱消散时,对应降水减弱并结束。3) 微波辐射计可以展现降水过程中垂直方向连续的水汽动态变化,对降水天气的临近预报有较好的辅助参考作用。Using TBB data from Fengyun-4A satellite, precipitation data from AWOS system, microwave radiometer data, and Doppler weather radar data, this study investigates a snowfall event at Urumqi Airport from January 11~13, 2023. The results show that: 1) The change of TBB value has a good indicator significance for the short-time forecast of snowfall weather. The sudden drop of TBB value before snowfall indicates the beginning of snowfall, the decrease of TBB value during snowfall corresponds to the strengthening of snowfall intensity, and the sudden increase of TBB value indicates the end of snowfall. 2) When the radar echo is continuous as a whole, the center range is increased, and the intensity is increased, the precipitation rises obviously and remains stable;When the echo weakens and dissipates, the corresponding precipitation weakens and ends. 3) The microwave radiometer can show the continuous dynamic change of water vapor in the vertical direction during the precipitation process, which has a good auxiliary reference for the precipitation weather forecast.展开更多
文摘利用ERA5再分析资料、乌鲁木齐机场微波辐射计资料、机场报文分析2021年7月30日~31日乌鲁木齐机场降雨天气形势。结果表明:1) 此次降水天气受乌拉尔山大槽东移南下影响产生,槽后北风带强,持续有冷空气补充;槽前西南气流强盛,为降水提供充足的水汽;高空槽移动速度缓慢,为新疆地区带来了较长时间的持续降雨。2) 低层辐合上升、中层辐散下沉的配置为降水提供了动力条件;相对湿度大值区持续时间长,为机场持续性降水提供了良好的水汽条件。3) 微波辐射计可以较好的展现机场上空垂直方向上水汽的时间变化特征。The rain weather situation of Urumqi Airport from July 30 to 31, 2021 was analyzed by using ERA5 reanalysis data, microwave radiometer data of Urumqi Airport and airport messages. The results show that: 1) the precipitation was influenced by the eastward and southward movement of the Great Ural Trough, and the north wind belt behind the trough was strong and cold air continued to supplement. The southwest airflow in front of the trough is strong, which provides sufficient water vapor for precipitation. The trough moved slowly, bringing a long period of continuous rainfall to Xinjiang. 2) The configuration of convergence rising in low layer and divergence sinking in middle layer provided dynamic conditions for precipitation. The relative humidity high value area lasts for a long time, which provides good water vapor conditions for the continuous precipitation at the airport. 3) The microwave radiometer can better display the temporal variation characteristics of water vapor in the vertical direction over the airport.
文摘利用风云四号A星TBB资料、AWOS系统降水资料、微波辐射计资料及多普勒天气雷达资料对2023年1月11日~13日乌鲁木齐机场一次高影响降雪天气进行研究。结果表明:1) TBB值的变化对降雪天气的短时临近预报有较好的指示意义,降雪前TBB值骤降预示着降雪的开始,在降雪过程中,TBB值减小对应降雪强度加强,二TBB值骤增则预示着降雪将结束。2) 雷达回波整体连续,中心范围增大,强度增强时,降水明显上升,并稳定维持;回波减弱消散时,对应降水减弱并结束。3) 微波辐射计可以展现降水过程中垂直方向连续的水汽动态变化,对降水天气的临近预报有较好的辅助参考作用。Using TBB data from Fengyun-4A satellite, precipitation data from AWOS system, microwave radiometer data, and Doppler weather radar data, this study investigates a snowfall event at Urumqi Airport from January 11~13, 2023. The results show that: 1) The change of TBB value has a good indicator significance for the short-time forecast of snowfall weather. The sudden drop of TBB value before snowfall indicates the beginning of snowfall, the decrease of TBB value during snowfall corresponds to the strengthening of snowfall intensity, and the sudden increase of TBB value indicates the end of snowfall. 2) When the radar echo is continuous as a whole, the center range is increased, and the intensity is increased, the precipitation rises obviously and remains stable;When the echo weakens and dissipates, the corresponding precipitation weakens and ends. 3) The microwave radiometer can show the continuous dynamic change of water vapor in the vertical direction during the precipitation process, which has a good auxiliary reference for the precipitation weather forecast.
