In this study, we improved the water-based condensation particle counter in Atmospheric Research Aircraft NARA and investigated the condensation particle number concentration over the Korean peninsula. Pump and set point information were changed to improve the instrument used by aircraft for observation. Ground-based observational result showed that the error between two instruments, which are water-based condensation particle counter and butanol-based condensation particle counter, was 4.7%. Aerial observational result revealed that the number concentration before improvement indicate large variation with unstable condition, whereas the number concentration after improvement indicate a reasonable variation. After improvement, the number concentration was 706±499 particle/㎤ in the West Sea and 257±80 particle/㎤ in Gangwon-do, and these are similar to the concentration range reported in previous studies. Notably, this is the first attempt to use aerial observation with water-based condensation particle counter to investigate condensation particle number concentration.

Abstract
1. 서 론
2. 연구 방법
    2.1. 기상 항공관측 장비
3. 응결핵입자계수기 개선
4. 결과 및 고찰
    4.1. 응결핵입자계수기 개선 지상 검정
    4.2. 응결핵입자계수기 개선 항공 검정
    4.3. 한반도 인근 응결핵 입자 특성
5. 결 론
REFERENCES

• 정운선(국립기상과학원 기상응용연구부) | Woonseon Jung (Research Applications Department, National Institute of Meteorological Sciences) Corresponding author
• 구정모(국립기상과학원 기상응용연구부) | Jung Mo Ku (Research Applications Department, National Institute of Meteorological Sciences)
• 김민성(국립기상과학원 관측연구부) | Min-Seong Kim (Observation Research Department, National Institute of Meteorological Sciences)
• 신혜민(써니항공 기상항공기사업본부) | Hye-min Shin (Atmospheric Research Aircraft Operation Department)
• 고아름(국립기상과학원 기상응용연구부) | A-Reum Ko (Research Applications Department, National Institute of Meteorological Sciences)
• 장기호(국립기상과학원 기상응용연구부) | Ki-Ho Chang (Research Applications Department, National Institute of Meteorological Sciences)
• 차주완(국립기상과학원 기상응용연구부) | Joo Wan Cha (Research Applications Department, National Institute of Meteorological Sciences)
• 이용희(국립기상과학원 기상응용연구부) | Yong Hee Lee (Research Applications Department, National Institute of Meteorological Sciences)