Title Page
Contents
요약 10
I. Introduction 11
II. Data and Method 15
2.1. Data 15
2.1.1. Parsivel disdrometer 15
2.1.2. Automated Synoptic Observing System; ASOS 21
2.1.3. Lightning detection network; LINET 22
2.2. Method 25
2.2.1. Number concentration and the DSD parameters 25
2.2.2. Cases selection 30
2.2.3. Using T-matrix for dual-polarimetric parameters 39
III. Results 41
3.1. Number concentration distribution 41
3.2. Raindrop size distribution 45
3.3. Analysis of the relationship between Rainrate and DSD parameter 49
3.4. Rainfall estimation using dual-polarimetric parameters 53
IV. Summary and conclusions 63
References 65
Table 2.1.1. The classification according to volume-equivalent diameter. 18
Table 2.1.2. The classification according to fall velocity. 19
Table 2.1.3. The specification information of disdrometer 20
Table 2.1.4. Observational parameters of lightning data. 23
Table 2.2.1. Cases of heavy rain accompanied with lightning. 30
Table 3.4.1. Rainfall estimation relationship using dual-polarimetric... 54
Table 3.4.2. Same as Table 3.4.1 but for category 10≤N/T〈50. 57
Table 3.4.3. Same as Table 3.4.1 but for category 50≤N/T. 60
Fig. 2.1.1. Functional principle of Parsivel disdrometer(OTT). 16
Fig. 2.1.2. (a) Signal changes whenever a particle falls through the laser... 16
Fig. 2.1.3. Cumulative precipitation at Seoul point from June to August, 2020. 21
Fig. 2.1.4. The location of 21 lightning observatory networks. 23
Fig. 2.1.5. Lightning occurrence consideration area designated as the... 24
Fig. 2.2.1. (a) 10 minutes cumulative precipitation, and number of lightning,... 31
Fig. 2.2.2. (a) The weather chart, and (b) the adiabatic chart of 2100 KST... 31
Fig. 2.2.3. (a) 10 minutes cumulative precipitation, and number of lightning,... 32
Fig. 2.2.4. (a) The weather chart, and (b) the adiabatic chart of 0900 KST... 32
Fig. 2.2.5. (a) 10 minutes cumulative precipitation, and number of lightning,... 33
Fig. 2.2.6. (a) The weather chart, and (b) the adiabatic chart of 0900 KST... 34
Fig. 2.2.7. (a) 10 minutes cumulative precipitation, and number of lightning,... 35
Fig. 2.2.8. (a) The weather chart, and (b) the adiabatic chart of 2100 KST... 35
Fig. 2.2.9. (a) 10 minutes cumulative precipitation, and number of lightning,... 36
Fig. 2.2.10. (a) The weather chart, and (b) the adiabatic chart of 0900 KST... 36
Fig. 2.2.11. (a) 10 minutes cumulative precipitation, and number of lightning,... 37
Fig. 2.2.12. (a) The weather chart, and (b) the adiabatic chart of 0900 KST... 38
Fig. 3.1.1. Number concentration distribution by rainrate in heavy rain cases... 42
Fig. 3.1.2. Number concentration distribution according to rainrate for each... 44
Fig. 3.2.1. log10Nw-D0 distribution of heavy rain cases accompanied with lightning.[이미지참조] 45
Fig. 3.2.2. log10Nw-D0 distribution by case of heavy rain accompanied...[이미지참조] 48
Fig. 3.3.1. NT-R (a) and Z-R (b) relations of heavy rain accompanied...[이미지참조] 50
Fig. 3.4.1. Scatter plot of rainrate the calculated of category N/T〈10. (a)... 55
Fig. 3.4.2. Same as Fig. 3.4.1 but for category 10≤N/T〈50. 58
Fig. 3.4.3. Same as Fig. 3.4.1 but for category 50≤N/T. 61