Development and Evaluation of the Raindrop Size Distribution Parameters for the NASA Global Precipitation Measurement Mission Ground Validation Program
| dc.contributor.author | Tokay, Ali | |
| dc.contributor.author | D’Adderio, Leo Pio | |
| dc.contributor.author | Wolff, David B. | |
| dc.contributor.author | Petersen, Walter A. | |
| dc.date.accessioned | 2020-03-23T18:44:43Z | |
| dc.date.available | 2020-03-23T18:44:43Z | |
| dc.date.issued | 2019-11-01 | |
| dc.description.abstract | The National Aeronautics and Space Administration Global Precipitation Measurement (GPM) mission ground validation program uses dual-polarization radar moments to estimate raindrop size distribution (DSD) parameters, the mass-weighted mean drop diameter Dmass, and normalized intercept parameter NW, to validate the GPM Core Observatory–derived DSD parameters. The disdrometer-based Dmass and NW are derived through empirical relationships between Dmass and differential reflectivity ZDR, and between NW, reflectivity ZH, and Dmass. This study employs large datasets collected from two-dimensional video disdrometers (2DVD) during six different field studies to derive the requisite empirical relationships. The uncertainty of the derived Dmass(ZDR) relationship is evaluated through comparisons of 2DVD-calculated and ZDR-estimated Dmass, where ZDR is calculated directly from 2DVD observations. Similarly, the uncertainty of the NW(ZH, Dmass) relationship is evaluated through 2DVD-calculated and Dmass and ZH-estimated NW, where Dmass and ZH are directly calculated from 2DVD observations. This study also presents the sensitivity of Dmass(ZDR) relationships to climate regime and to disdrometer type after developing three additional Dmass(ZDR) relationships from second-generation Particle Size Velocity (PARSIVEL²) disdrometer (P2) observations collected in the Pacific Northwest, in Iowa, and at Kwajalein Atoll in the tropical Pacific Ocean. The application of P2-derived Dmass(ZDR) relationship based on precipitation in the northwestern United States to P2 observations collected over the tropical ocean resulted in the highest error among comparisons of the three datasets. | en_US |
| dc.description.sponsorship | The 2DVD and P2 MC3E, IFloodS, IPHEx, and OLYMPEx field campaign datasets are available through NASA Global Hydrology Resource Center (through https://ghrc.nsstc.nasa.gov/home/fieldcampaigns/XXX, where XXX refers to field campaign). Discussions with Robert Meneghini of NASA Goddard Space Flight Center improved the presentation of the manuscript. Special thanks to all of the 2DVD/P2 and NPOL engineers, technicians, and scientists based at NASA Wallops Flight Facility. This manuscript was funded under NASA Precipitation Measuring Mission NNX16AD45G led by Ramesh Kakar of NASA Headquarters. WAP and DBW acknowledge support from the GPM and PMM programs. | en_US |
| dc.description.uri | https://journals.ametsoc.org/doi/10.1175/JTECH-D-18-0071.1 | en_US |
| dc.format.extent | 15 pages | en_US |
| dc.genre | journal articles | en_US |
| dc.identifier | doi:10.13016/m27s5h-j7gl | |
| dc.identifier.citation | Tokay, Ali; D’Adderio, Leo Pio; Wolff, David B. Petersen, Walter A.; Development and Evaluation of the Raindrop Size Distribution Parameters for the NASA Global Precipitation Measurement Mission Ground Validation Program; Journal of Atmospheric and Oceanic Technology 37,3 (2019); https://journals.ametsoc.org/doi/10.1175/JTECH-D-18-0071.1 | en_US |
| dc.identifier.uri | https://doi.org/10.1175/JTECH-D-18-0071.1 | |
| dc.identifier.uri | http://hdl.handle.net/11603/17592 | |
| dc.language.iso | en_US | en_US |
| dc.publisher | American Meteorological Society | 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 Faculty Collection | |
| 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 | Development and Evaluation of the Raindrop Size Distribution Parameters for the NASA Global Precipitation Measurement Mission Ground Validation Program | en_US |
| dc.type | Text | en_US |