XRAINを用いた冬期の0℃高度の推定手法に関する検討

Abstract

Freezing level in winter season is an important information for judgement of rain or snow about precipitation, and dry or wet about snowfall. We can get freezing level information directly using radio-sonde observation data, but it is not suiTable for real-time operation such as railway. In this study, we developed a method to estimate freezing level using XRAIN observation data. In winter precipitation cases at Toyama prefecture, it is confirmed that our developed method can estimate freezing level in more cases and improve the accuracy than previous studies method. And we applied developed method to Niigata area and compared with ground observation data, and it was confirmed that developed method could improve the accuracy to determine the type of precipitation.