3次元レーダー雨量計情報の利用に関する基礎的研究

Abstract

We developed several colour graphic screens which can visually represent both thedistribution of echo intensity and shape of three dimensionally spread precipitation field, inorder to investigate how fine resolution the radar information has.By the use of VCAPPI (Various Constant Altitude Plan Positions Indicator), which wedeveloped from CAPPI, we can visually investigate the three dimensional characteristics ofprecipitation phenomena in meso-B scale. Furthermore, by the use of RRHI (Range-RHI), which is in the form of the arrangement of fifteen RHIs, we can visually investigate inmeso-r scale.In the case of very heavy rainfall which arose along Baiu front on the 21 July in1986, from RRHI we can find a convective echo consists of several echo cells in variouslife stages. This means that the convective echo is from a multi-cell storm. This fact can bealso verified from RHTI (Range Height Time Indicator)~ which can visually represent thetime series of echo pattern in arbitrary vertical section, by setting the vertical section alongthe storm moving direction.On the other hand, we found that characteristics of the three dimensionally spreadecho pattern were relatively well explained by the combination of the meteorological datafrom routine observation networks and the configulation of the ground.