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Doppler Radar Observations on the Structure and Characteristics of Tropical Clouds during the TOGA-COARE IOP in Manus, Papua New Guinea : Characteristics of Cloud Clusters Analyzed with Doppler and GMS-IR Data
| Content Provider | Semantic Scholar |
|---|---|
| Author | Kikuchi, Osamu Uyeda, Hiroshi |
| Copyright Year | 1996 |
| Abstract | Two characteristic cloud clusters (24 Nov. and 21 Dec. 1992) during the observation period of TOGA-COARE lOP in lVIanus were chosen for analyses. In the time variation of radar-estimated rain rate, two modal distributions of large rain rate were recognized for convective portion. The first mode consisted of heavy rainfall in a convective cores of mature stage. The second mode corresponded to the relatively weak rainfall below the melting layer at the beginning of the dissipating stage. On the other hand, the predominance of a stratiform area and rainfall amounts relative to convective components through the lifetime of a cloud cluster was analyzed with radar data, even in the development to the mature stage of the cluster. The analyses of GlVIS-IR data were combined with the rader data analyses in order to better understand the characteristics of cloud clusters. The extension of cloud area analyzed with GlVIS-IR data showed a time lag (a few hours) behind the evolution of the radar echo top height and echo area. The existence of thick snow and/or ice layer above the melting layer in cloud clusters was supported by the comparison between the analyses of Doppler radar data and the analyses of GlVIS-IR data using the CST (Convective Stratiform Technique), which is the method to distinguish between convective and stratiform components of cloud clusters. The area and rainfall amounts determined from the CST did not agree with those observed and estimated using radars, when independent convection from a convection below the melting layer was recognized above the melting layer. Though the expansion of the low TBB region caused a difficulty in the estimation of surface rainfall amounts from GlVIS-IR data, the extension of the low TBB after the mature stage is considered as one of characteristics of cloud clusters in the equatorial west Pacific. * Present Affiliation: Japan Air System, Haneda Airport, Tokyo 144, Japan. 108 o. Kikuchi and H. Uyeda |
| Starting Page | 107 |
| Ending Page | 133 |
| Page Count | 27 |
| File Format | PDF HTM / HTML |
| Volume Number | 10 |
| Alternate Webpage(s) | https://eprints.lib.hokudai.ac.jp/dspace/bitstream/2115/8813/2/10(1)_p107-133.pdf |
| Alternate Webpage(s) | http://eprints.lib.hokudai.ac.jp/dspace/bitstream/2115/8813/2/10(1)_p107-133.pdf |
| Language | English |
| Access Restriction | Open |
| Content Type | Text |
| Resource Type | Article |
