The statistical characteristics of aerosol–cloud interactions over East Asia were investigated using Moderate Resolution Imaging Spectroradiometer satellite data. The long-term relationship between various aerosol and cloud parameters was estimated using correlation analysis, principle component analysis, and Aerosol Indirect Effect (AIE) estimation. In correlation analysis, Aerosol Optical Depth (AOD) was positively Correlated with Cloud Condensation Nuclei (CCN) and Cloud Fraction (CF), but negatively correlated with Cloud Top Temperature (CTT) and Cloud Top Pressure (CTP). Fine Mode Fraction (FMF) and CCN were positively correlated over the ocean because of sea spray. In principle component analysis, AOD and FMF were influenced by water vapor. In particular, AOD was positively influenced by CF, and negatively by CTT and CTP over the ocean. In AIE estimation, the AIE value in each cloud layer and type was mostly negative (Twomey effect) but sometimes positive (anti-Twomey effect). This is related to regional, environmental, seasonal, and meteorological effects. Rigorous and extensive studies on aerosol–cloud interactions over East Asia should be conducted via micro- and macro-scale investigations, to determine chemical characteristics using various meteorological instruments.

Abstract
1. 서 론
2. 재료 및 방법
    2.1. 재료
    2.2. 방법
3. 결과 및 고찰
    3.1. 상관관계 분석
    3.2. 주성분분석
    3.3. 구름의 에어로졸 간접효과
4. 결 론
REVERENCES

• 정운선(국립기상과학원 융합기술연구부) | Woonseon Jung (Convergence Meteorological Research Department, National Institute of Meteorological Sciences, Jeju 63568, Korea) Corresponding author
• 성현민(국립기상과학원 미래기반연구부) | Hyun Min Sung (Innovative Meteorological Research Department, National Institute of Meteorological Sciences, Jeju 63568, Korea)
• 이동인(부경대학교 환경대기과학과) | Dong-In Lee (Department of Environmental Atmospheric Sciences, Pukyong National University, Busan 648513, Korea)
• 차주완(국립기상과학원 융합기술연구부) | Joo Wan Cha (Convergence Meteorological Research Department, National Institute of Meteorological Sciences, Jeju 63568, Korea)
• 장기호(국립기상과학원 융합기술연구부) | Ki-Ho Chang (Convergence Meteorological Research Department, National Institute of Meteorological Sciences, Jeju 63568, Korea)
• 이철규(국립기상과학원 융합기술연구부) | Chulkyu Lee (Convergence Meteorological Research Department, National Institute of Meteorological Sciences, Jeju 63568, Korea)