Characteristics of DSD Bulk Parameters: Implication for Radar Rain Retrieval
| dc.contributor.author | Liao, Liang | |
| dc.contributor.author | Meneghini, Robert | |
| dc.contributor.author | Iguchi, Toshio | |
| dc.contributor.author | Tokay, Ali | |
| dc.date.accessioned | 2020-07-16T17:01:42Z | |
| dc.date.available | 2020-07-16T17:01:42Z | |
| dc.date.issued | 2020-06-25 | |
| dc.description.abstract | With the use of 213,456 one-minute measured data of droplet-size distribution (DSD) of rain collected during several National Aeronautics and Space Administration (NASA)-sponsored field campaigns, the relationships between rainfall rate R, mass-weighted diameter Dm and normalized intercept parameter Nw of the gamma DSD are studied. It is found, based on the simulations of the gamma DSD model, that R, Dm and Nw are closely interrelated, and that the ratio of R to Nw is solely a function of Dm, independent of the shape factor μ of the gamma distribution. Furthermore, the model-produced ratio agrees well with those from the DSD data. When a power-law equation is applied to fit the model data, we have: R=aNwDbm , where a=1.588×10−4 , b=4.706 . Analysis of two-parameter relationships such as R–Dm, Nw–R and Nw–Dm reveals that R and Dm are moderately correlated while Nw and Dm are negatively correlated. Nw and R, however, are uncorrelated. The gamma DSD model also reveals that variation of R–Dm relation is caused primarily by Nw. For the application of the Ku- and Ka-band dual-frequency radar for the retrieval of the DSD bulk parameters as well as the specific radar attenuations, the study is carried out to relate the dual-frequency radar reflectivity factors to the DSD and attenuation parameters | en_US |
| dc.description.sponsorship | This work is supported by G.D. Skofronick-Jackson of NASA Headquarters under NASA’s Precipitation Measurement Mission (PMM) Grant NNH18ZDA001N-PMMST. The authors also wish to thank the NASA PMM ground validation team for providing and processing DSD data. This research was funded by NASA’s Precipitation Measurement Mission (PMM) Grant NNH18ZDA001N-PMMST. | en_US |
| dc.description.uri | https://www.mdpi.com/2073-4433/11/6/670 | en_US |
| dc.format.extent | 15 pages | en_US |
| dc.genre | journal articles | en_US |
| dc.identifier | doi:10.13016/m2adbq-ezmv | |
| dc.identifier.citation | Liang Liao et al., Characteristics of DSD Bulk Parameters: Implication for Radar Rain Retrieval, Atmosphere 2020, 11(6), 670; https://doi.org/10.3390/atmos11060670 | en_US |
| dc.identifier.uri | https://doi.org/10.3390/atmos11060670 | |
| dc.identifier.uri | http://hdl.handle.net/11603/19171 | |
| dc.language.iso | en_US | en_US |
| dc.publisher | MDPI | en_US |
| dc.relation.isAvailableAt | The University of Maryland, Baltimore County (UMBC) | |
| dc.relation.ispartof | UMBC Joint Center for Earth Systems Technology | |
| dc.relation.ispartof | UMBC Physics Department | |
| dc.rights | This item is likely protected under Title 17 of the U.S. Copyright Law. Unless on a Creative Commons license, for uses protected by Copyright Law, contact the copyright holder or the author. | |
| dc.rights | Public Domain Mark 1.0 | * |
| dc.rights | This work was written as part of one of the author's official duties as an Employee of the United States Government and is therefore a work of the United States Government. In accordance with 17 U.S.C. 105, no copyright protection is available for such works under U.S. Law. | |
| dc.rights.uri | http://creativecommons.org/publicdomain/mark/1.0/ | * |
| dc.title | Characteristics of DSD Bulk Parameters: Implication for Radar Rain Retrieval | en_US |
| dc.type | Text | en_US |