首页> 外文期刊>Advances in Geosciences >Mesoscale GPS Zenith Delay assimilation during a Mediterranean heavy precipitation event
【24h】

Mesoscale GPS Zenith Delay assimilation during a Mediterranean heavy precipitation event

机译:地中海强降水事件中的中尺度GPS天顶延迟同化

获取原文
           

摘要

The impact of assimilating Zenith Total delay (ZTD) observationsfrom a mesoscale ground-based GPS network over Western Europe is evaluated forthe heavy precipitation event of 5–9 September 2005 over Southern France. The ZTDassimilation is performed using a three dimensional variational data assimilationsystem at the 9.5-km horizontal resolution. Then using as initial conditions the 3DVAR analyseswith and without assimilation of ZTD, we perform 2.4-km non-hydrostatic MESO-NH simulations.The results of the fine-scale simulations indicate that assimilation of ZTD help to improve theforecast of the tropospheric water vapour content and the quantitative precipitation forecast.We have also assessed through single observation experiments the influence of the formulation ofthe observation operator which is used to compute the model equivalent ZTD.
机译:对于2005年9月5日至9日在法国南部发生的强降水事件,评估了西欧中尺度地面GPS网络吸收天顶总延迟(ZTD)观测结果的影响。 ZTD同化使用的是9.5公里水平分辨率的三维变分数据同化系统。然后使用3DVAR分析作为初始条件,对ZTD进行同化或不对ZTD进行同化,我们进行了2.4 km的非静水MESO-NH模拟。精细模拟结果表明,对ZTD的同化有助于改善对流层水汽含量的预测我们还通过单次观测实验评估了观测算子公式的影响,该算子用于计算模型等效ZTD。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱:kefu@zhangqiaokeyan.com

京公网安备:11010802029741号 ICP备案号:京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有
  • 客服微信

  • 服务号