Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1029/2017JD028186 |
How Does Riming Affect Dual-Polarization Radar Observations and Snowflake Shape? | |
Li, Haoran1; Moisseev, Dmitri1,2; von Lerber, Annakaisa2 | |
2018-06-16 | |
发表期刊 | JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES |
ISSN | 2169-897X |
EISSN | 2169-8996 |
出版年 | 2018 |
卷号 | 123期号:11页码:6070-6081 |
文章类型 | Article |
语种 | 英语 |
国家 | Finland |
英文摘要 | As an ice particle grows by riming its shape is expected to change, resulting in a more spherical particle at the later stages of riming. This conceptual model is at the core of the current ice microphysical schemes and used for dual-polarization radar observation based classification of hydrometeors. A quantitative relation between riming and shapes of snowflake aggregates, however, has not been established yet. This study aims to derive this relation by using surface-based precipitation and coinciding dual-polarization radar observations. The observations were collected during four winter seasons, 49 snowstorms, at University of Helsinki measurement station in Hyytiala, Finland. Results show that relation between the differential reflectivity and reflectivity-weighted rime mass fraction is not monotonic and depends on reflectivity-weighted mean diameter. This behavior can be explained by the opposing effects of riming on dual-polarization radar observations. Riming increases particle bulk density, which leads to more pronounced dual-polarization radar signatures. As riming progresses the aspect ratio of snowflake increases slowly until the rime mass fraction value reaches a certainty value after which the aspect ratio increases more rapidly. Finally, coutilization of Z(e), Z(dr), and K-dp for inferring riming fraction is analyzed. |
英文关键词 | rime mass fraction dual-polarization radar ice particle aspect ratio snowfall |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000436110800019 |
WOS关键词 | T-MATRIX COMPUTATIONS ; IN-SITU OBSERVATIONS ; POLARIMETRIC RADAR ; HYDROMETEOR CLASSIFICATION ; ICE PARTICLES ; MICROPHYSICAL PROPERTIES ; WEATHER RADARS ; ASPECT RATIOS ; SNOWFALL RATE ; FALLING SNOW |
WOS类目 | Meteorology & Atmospheric Sciences |
WOS研究方向 | Meteorology & Atmospheric Sciences |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/32224 |
专题 | 气候变化 |
作者单位 | 1.Univ Helsinki, Fac Sci, Inst Atmospher & Earth Syst Res Phys, Helsinki, Finland; 2.Finnish Meteorol Inst, Helsinki, Finland |
推荐引用方式 GB/T 7714 | Li, Haoran,Moisseev, Dmitri,von Lerber, Annakaisa. How Does Riming Affect Dual-Polarization Radar Observations and Snowflake Shape?[J]. JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES,2018,123(11):6070-6081. |
APA | Li, Haoran,Moisseev, Dmitri,&von Lerber, Annakaisa.(2018).How Does Riming Affect Dual-Polarization Radar Observations and Snowflake Shape?.JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES,123(11),6070-6081. |
MLA | Li, Haoran,et al."How Does Riming Affect Dual-Polarization Radar Observations and Snowflake Shape?".JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES 123.11(2018):6070-6081. |
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