| contributor author | Park, S.-G.;Kim, Hae-Lim;Ham, Young-Woong;Jung, Sung-Hwa | |
| date accessioned | 2018-01-03T10:59:52Z | |
| date available | 2018-01-03T10:59:52Z | |
| date copyright | 7/19/2017 12:00:00 AM | |
| date issued | 2017 | |
| identifier other | jtech-d-16-0256.1.pdf | |
| identifier uri | http://138.201.223.254:8080/yetl1/handle/yetl/4245833 | |
| description abstract | AbstractThe performance of the OTT second-generation Particle Size Velocity (PARSIVEL2) laser weather sensor is evaluated by comparing it with a collocated two-dimensional video disdrometer (2DVD) and rain gauges using data collected over a total of 36 rain events. A comparison of raindrop size distributions (DSDs) between the 2DVD and two PARSIVEL2 reveals good agreement for weak rainfall rates below approximately 10 mm h?1 and for midsize drops with diameters between 0.6 and 4.0 mm irrespective of rainfall rates, whereas the PARSIVEL2 produces overestimations of large drops with diameters above 4 mm during heavy rainfall above approximately 20 mm h?1. The resultant DSD parameters of the PARSIVEL2 present overestimations of the mean diameter Dm in the normalized gamma function and the maximum drop diameter Dmax, and underestimations of the intercept parameter Nw and total number of drops NT. Furthermore, how the characteristics of DSDs from the PARSIVEL2 affect the polarimetric radar variables, such as differential reflectivity ZDR and specific differential phase KDP, is examined, as well as how these characteristics affect empirical relations required in radar hydrometeorological applications such as quantitative rainfall estimations. Based on these examinations, it can be concluded that the OTT PARSIVEL2 still produces overestimations of large drops and underestimations of small drops during heavy rainfall, similar to older models of PARSIVEL, despite significant improvements to the PARSIVEL2 system, and furthermore that the uses of PARSIVEL2 measurements can act as a source of error in radar hydrometeorological applications such as radar rainfall estimations. | |
| publisher | American Meteorological Society | |
| type | Journal Paper | |
| journal volume | 34 | |
| journal issue | 9 | |
| journal title | Journal of Atmospheric and Oceanic Technology | |
| identifier doi | 10.1175/JTECH-D-16-0256.1 | |
| journal fristpage | 2059 | |
| journal lastpage | 2082 | |
| tree | Journal of Atmospheric and Oceanic Technology:;2017:;volume( 034 ):;issue: 009 | |
| contenttype | Fulltext | |
