Evaluation of potential impacts of future Japan's space-based Doppler Wind Lidar (DWL) on polar- and tropical-orbiting satellites

摘要

The feasibility of coherent Doppler wind lidars (DWLs) has been investigated based on a sensitivity observation system simulation experiment (OSSE). The pseudo-truth atmospheric field is generated from the Sensitivity Observing System Experiment (SOSE) approach. Hourly aerosols are produced to simulate DWL by a global aerosol chemical transport model in which wind field is nudged with pseudotruth. Simulated measurement of horizontal line-of-sight wind speeds is assimilated by using the four-dimensional variational (4D-Var) scheme of the operational global data assimilation system at Japan Meteorological Agency. We evaluated potential impacts of DWLs onboard polar and low-inclination orbiting satellites in January and August in 2010. We found positive impacts of DWLs on either satellites and greater impacts in the January experiment. The results also showed seasonal dependency of impacts and importance of quality control and observation error setting.