Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1029/2018JD028603 |
Retrievals of Riming and Snow Density From Vertically Pointing Doppler Radars | |
Mason, S. L.1,2; Chiu, C. J.3; Hogan, R. J.1,4; Moisseev, D.5,6; Kneifel, S.7 | |
2018-12-27 | |
发表期刊 | JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES |
ISSN | 2169-897X |
EISSN | 2169-8996 |
出版年 | 2018 |
卷号 | 123期号:24页码:13807-13834 |
文章类型 | Article |
语种 | 英语 |
国家 | England; USA; Finland; Germany |
英文摘要 | Retrievals of ice and snow are made from Ka- and W-band zenith-pointing Doppler radars at Hyytiala, Finland, during the snow experiment component of the Biogenic Aerosols: Effects on Clouds and Climate (2014) field campaign. In a novel optimal estimation retrieval, mean Doppler velocity is exploited to retrieve a density factor parameter, which modulates the mass, shape, terminal velocity, and backscatter cross sections of ice particles. In a case study including aggregate snow and graupel we find that snow rate and ensemble mean ice density can be retrieved to within 50% of in situ measurements at the surface using dual-frequency Doppler radar retrievals. While Doppler measurements are essential to the retrieval of particle density, the dual-frequency ratio provides a strong constraint on particle size. The retrieved density factor is strongly correlated with liquid water path, indicating that riming is the primary process by which the density factor is modulated. Using liquid water path as a proxy for riming, profiles classified as unrimed snow, rimed snow, and graupel exhibit distinct features characteristic of aggregation and riming processes, suggesting the potential to make estimates of process rates from these retrievals. We discuss the potential application of the technique to future satellite missions. Plain Language Summary Ground-based radar measurements of ice clouds and snow are used to estimate the size, number, and density of snowflakes. Doppler velocity measurements of particle fall speeds are used to estimate the mass and shape of the snow particles. The properties of snow estimated using radar compare well against measurements of particles at the surface and estimates of the amount of liquid water in the atmosphere; the presence of liquid water relates to the potential for riming, in which snowflakes increase in density and fall speed by collecting and freezing liquid droplets. More accurate estimates of snow density from ground-based and satellite radars help to improve global estimates of precipitation and snow accumulation and the representation of clouds and snow in weather and climate models. |
英文关键词 | remote sensing snow precipitation optimal estimation mixed-phase cloud riming |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000455876300012 |
WOS关键词 | PARTICLE-SIZE DISTRIBUTION ; MIXED-PHASE CLOUDS ; ICE WATER-CONTENT ; TERMINAL VELOCITIES ; ENSEMBLE RETRIEVAL ; WAVELENGTH RADAR ; FALL VELOCITIES ; LIQUID WATER ; MICROPHYSICS ; SCATTERING |
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/33067 |
专题 | 气候变化 |
作者单位 | 1.Univ Reading, Dept Meteorol, Reading, Berks, England; 2.Univ Reading, Natl Ctr Earth Observat, Reading, Berks, England; 3.Colorado State Univ, Dept Atmospher Sci, Ft Collins, CO 80523 USA; 4.European Ctr Medium Range Weather Forecasts, Reading, Berks, England; 5.Univ Helsinki, Inst Atmospher & Earth Syst Res Phys, Fac Sci, Helsinki, Finland; 6.Finnish Meteorol Inst, Helsinki, Finland; 7.Univ Cologne, Inst Geophys & Meteorol, Cologne, Germany |
推荐引用方式 GB/T 7714 | Mason, S. L.,Chiu, C. J.,Hogan, R. J.,et al. Retrievals of Riming and Snow Density From Vertically Pointing Doppler Radars[J]. JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES,2018,123(24):13807-13834. |
APA | Mason, S. L.,Chiu, C. J.,Hogan, R. J.,Moisseev, D.,&Kneifel, S..(2018).Retrievals of Riming and Snow Density From Vertically Pointing Doppler Radars.JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES,123(24),13807-13834. |
MLA | Mason, S. L.,et al."Retrievals of Riming and Snow Density From Vertically Pointing Doppler Radars".JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES 123.24(2018):13807-13834. |
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