연직강우레이더와 광학우적계 관측자료를 이용한2012년 여름철 남해안 강우사례 분석
Analysis of Summer Rainfall Case over Southern Coast Using MRR and PARSIVEL Disdrometer Measurements in 2012
2
조회
0
다운로드
2
인용
0
참고문헌
키워드
초록
To investigate properties of cloud and rainfall occurred at Boseong on 10 July 2012, Raindrop Size distributions (RSDs) and other parameters were analyzed using observation data collected by Micro Rain Radar (MRR) and PARticle SIze and VELocity (PARSIVEL)disdrometer located in the National center for intensive observation of severe weather at Boseong in the southwest of the Korean peninsula. In addition, time series of RSD parameters,relationship between reflectivity-rain rate, and vertical variation of rain rates-fall velocities below melting layer were examined. As a result, good agreements were found in the reflectivity-rain rate time series as well as their power relationships between MRR and PARSIVEL disdrometer. The rain rate was proportional to reflectivity, mean diameter, and inversely proportional to shape (μ), slope (Λ), intercept (N0) parameter of RSD. In comparison of the RSD, as rain rate was increased, the slope of RSD became less steep and the mean diameter became larger. Also, it was verified that reflectivities are classified in three categories (Category 1: Z (reflectivity) > 40 dBZ, Category 2: 30 dBZ < Z < 40 dBZ, Category 3: Z < 30 dBZ). As reflectivity was increased, rain rate was intensified and larger raindrops were existed, while reflectivity was decreased, shape (μ), slope (Λ), intercept (N0) parameter of RSD were increased. We expected that these results will lead to better understanding of microphysical process in convective rainfall system occurred during short-term period over Korean peninsula.
Abstract
To investigate properties of cloud and rainfall occurred at Boseong on 10 July 2012, Raindrop Size distributions (RSDs) and other parameters were analyzed using observation data collected by Micro Rain Radar (MRR) and PARticle SIze and VELocity (PARSIVEL)disdrometer located in the National center for intensive observation of severe weather at Boseong in the southwest of the Korean peninsula. In addition, time series of RSD parameters,relationship between reflectivity-rain rate, and vertical variation of rain rates-fall velocities below melting layer were examined. As a result, good agreements were found in the reflectivity-rain rate time series as well as their power relationships between MRR and PARSIVEL disdrometer. The rain rate was proportional to reflectivity, mean diameter, and inversely proportional to shape (μ), slope (Λ), intercept (N0) parameter of RSD. In comparison of the RSD, as rain rate was increased, the slope of RSD became less steep and the mean diameter became larger. Also, it was verified that reflectivities are classified in three categories (Category 1: Z (reflectivity) > 40 dBZ, Category 2: 30 dBZ < Z < 40 dBZ, Category 3: Z < 30 dBZ). As reflectivity was increased, rain rate was intensified and larger raindrops were existed, while reflectivity was decreased, shape (μ), slope (Λ), intercept (N0) parameter of RSD were increased. We expected that these results will lead to better understanding of microphysical process in convective rainfall system occurred during short-term period over Korean peninsula.
참고문헌 (22)
- Atlas, D., "Doppler radar characteristics of precipitation at vertical incidence", Rev. Geophys. Space Phys, 11, pp.1~35 (1973)
- Atlas, D., "Systematic variation of drop size and radar-rainfall relations", J. Geophys. Res, 104, pp.6155~6169 (1999)
- Austin, A. M, "Relation between measured radar reflectivity and surface rainfall", Mon. Wea. Rev, 115, pp.1053~1070 (1987)
- 차주완, "강수의 물리적 특성 이해를 위한 MRR 및 PASIVEL 우적계의 관측사례 분석", 대기, 20(1), pp.37~47 (2010), 한국기상학회
- Choi, D.-Y, "Rainfall intensity distribution by time rate in Korea", Proceedings of the 2010 KIIT Summer Conference, pp.111~114 (2010), Korean Institute of Information Technology
- Chu, Y. H, "An investigation of the slope-shape relation for gamma raindrop size distribution", J. Appl. Meteor. Climatol, 47, pp.2531~2544 (2008)
- Fujiwara, M, "Raindrop-size distribution from individual storms", J. Atmos. Sci, 22, pp.585~591 (1965)
- Joss, J, "A method to improve the accuracy of radar measured amounts of precipitation. Proc", Tucson, AZ, Amer. Meteor. Soc, pp.237~238 (1970)
- Lee, G. W., "Time-scale dependence of the variability and its effects on rain estimation", J. Appl. Meteor, 44, pp.241~255 (2005)
- Choong Ke Lee, "Variability of the Rain Drop Size Distributions within a Storm", 한국기상학회지, 43(1), pp.1~16 (2007), 한국기상학회
- Marshall, J. S, "The distribution of raindrop size", J. Atmos. Sci, 5, pp.165~166 (1948)
- McGaughey, G, "High-resolution passive microwave observations of convective systems over the tropical pacific ocean", J. Appl. Meteor, 35, pp.1921~1947 (1996)
- McKague, D, "Assesment of the effects of drop size distribution variations retrieved from UHF radar on passive microwave remote sensing of precipitation", J. Appl. Meteor, 37, pp.155~165 (1998)
- Development and application of technology for weather forecast (II), "National Institute of Meteorological Research", 67~79 (2010)
- Peters, G, "Profiles of raindrop size distribution as retrieved by micro rain radars", J. Appl. Meteor, 44, pp.1930~1949 (2005)
- Steiner, M, "Climatological characterization of three-dimensional storm structure from operational radar and rain gage data", J. Appl. Meteor, 34, pp.1978~2007 (1995)
- Tokay, A, "Evidence from Tropical raindrop spectra of the origin of rain from stratiform versus convective clouds", J. Appl. Meteor, 35, pp.355~371 (1996)
- Uijlenhoet, R, "Variability of raindrop size distribution in a squall line and implications for radar rainfall estimation", J. Hydrometeor, 4, pp.43~61 (2003)
- Uijlenhoet, R, "Measurement and parameterization of rainfall microstructure", J. Hydrol, 328, pp.1~390 (2006)
- Viltard, A, "Rainfall and 6~9 day wave-like disturbance in westafrica during summer 1989", Meteorol. Atmos. Phys, 66, pp.229~234 (1998)
- Williams, C. R, "Raindrop size distribution variability estimated using ensemble statistics", Ann. Geophys, 27, pp.555~567 (2009)
- Zhao, G., "Improving the rainfall rate estimation in the midstream of the Heihe River Basin using raindrop size distribution", Hydrol. Earth Syst. Sci., 15, pp.943~951 (2011)