Precipitation Patterns in Korea through the Geostatistical Analysis and the Principal Component Analysis

Seminar by Prof. Seon-Ki Park from Ewha Womans University

10 December 2020
KST 10:00 – 11:00

The Seminar is being held in Room 1010 (Jasmin) – Integrated mechanical engineering building. Click here for the campus map.

Most precipitation systems in Korea are highly influenced by the East Asian summer monsoon (Changma) as well as by synoptic scale/mesoscale weather phenomena, and hence have high seasonal variation; they also show high spatial variation due to complex topographic features. Therefore, in order to improve the forecast accuracy, it is essential to understand the spatial and temporal characteristics as well as the occurrence and development mechanisms of the precipitation systems. In this seminar, three topics related to precipitation will be introduced: 1) Uncertainty in calculating precipitation climatology in East Asia; 2) Geostatistical assessment of warm-season precipitation observations in Korea based on the composite precipitation and satellite water vapor data. Here, classification of the precipitation types based on the spatial distribution of precipitation and identification of the spatial and temporal characteristics of warm-season precipitation in Korea according to the precipitation types will be discussed by employing the geostatistical analysis methods, including autocorrelogram, Moran’s I, and general G. The characteristics of water vapor over the Korean Peninsula associated with the precipitation types will be also shown through satellite data analysis; and 3) Synoptic-climatological pattern analysis of cold-season precipitation over Yeongdong, induced by the Korea easterlies (Kor’easterlies). It will be addressed using the principal component analysis (PCA) and the K-mean clustering methods.