## 5 Conclusions  
Our study analyzed the distribution frequency and characteristics of seedable clouds generated around the Korean Peninsula from December 2016 to November 2019. Our data consisted of cloud top height, cloud top temperature, cloud phase, cloud top pressure, cloud optical thickness, and rainfall intensity from the meteorological satellite COMS. Data with a high spatiotemporal resolution, from which cloud distribution and characteristics could be analyzed over a wide area, was used preferentially. Seedable clouds with a sufficient cloud fraction were classified into water cloud and ice cloud phases. In cases where phases were mixed, clouds were classified as ice cloud phase if the CTT was below \(-5\)\({}^{\circ}\)C or water cloud phase if it was \(-5\)\({}^{\circ}\)C or higher [25; 28; 39]. Seedable clouds around the Korean Peninsula exhibited the following average frequencies by season: 18% in winter, 8% in spring, 6% in summer, and 8% in fall. In winter, water phase seedable clouds showed high frequencies of 15-20% in the central West Sea, South Coast, and East Sea. Ice phase seedable clouds had high frequencies of 15-20% in the northern East Sea and West Sea. Water phase seedable clouds exhibited an average occurrence frequency of 8% on land, with frequencies that were 2-7% higher around the Taebaek and Sobaek Mountains than other land regions. Thus, the development and inflow of clouds on the sea around the Korean Peninsula, in addition to the development of mountainous clouds on high-altitude land, led to the high occurrence frequency of clouds suitable for seeding [9; 23; 26; 55; 56; 57]. Water and ice phase seedable clouds exhibited an average CTH of 2.43 km and 3.24 km, with a difference of 0.81 km, and a CTT of 3.11 \({}^{\circ}\)C and \(-8.41\)\({}^{\circ}\)C, with a difference of 11.52 K. Both water and ice phase seedable clouds had similar CTH on land and sea, though the CTT was approximately 0.65 K higher on sea. The Sc cloud type had the highest distribution of seedable clouds around the Korean Peninsula. It had the highest average frequency for all seasons at 63%, followed by Cu clouds at 15%, As clouds at 13%, and Ac clouds at 6%. The occurrence frequency of Sc clouds onland was 7% higher than on sea, and the occurrence frequency of Cu clouds on land was 6% lower than on sea. Approximately 78% of seedable clouds occurring around the Korean Peninsula were low-level clouds, and approximately 19% were mid-level clouds. The low-level Sc cloud type had the highest frequency at approximately 72% among water phase seedable clouds, and As clouds had the lowest frequency at approximately 13%. Among ice phase seedable clouds, the low-level Cu clouds exhibited the highest frequency at approximately 30%, and mid-level Ac clouds had a frequency of 27%. Therefore, the occurrence frequency of stratiform clouds was highest for water phase seedable clouds, while the occurrence frequency of cumuliform clouds was highest for ice phase seedable clouds. The annual average frequency of seedable clouds was 10%, with a difference of about 1% per year. This demonstrates that the frequency distribution of seedable clouds was very similar. In particular, the northern and southern sea regions of the Korean Peninsula in winter were found to be most suitable areas for conducting precipitation enhancement experiments because of the high occurrence frequency of seedable clouds. On land, the Taebaek and Sobaek Mountains were found to be suitable areas for these experiments [52; 59]. Field research is currently being conducted on precipitation enhancement experiments worldwide [11; 17; 60; 61; 62]. There is an increasing socioeconomic demand for addressing droughs, securing water resources, and preventing forest fires, which has led to the development of meteorological projects and the substantial growth of activities for precipitation enhancement [2].