In this study, we analyzed the characteristics of summer rainfall over South Korea during recent five(2009-2013) years using observation data. There was a significant contrast in interannual variability between July and August rainfall since 1998. Large increase of rainfall in July (2009 and 2011) and August (2010 and 2012) were found to be consistent over all 60 stations in South Korea. Enhanced precipitation over western tropical Paciÿc and anticyclonic anomaly to the east of Korean peninsula were the common features when there was rainfall increase both in July and August. Intraseasonal summer rainfall over South Korea evolves in time lag with intraseasonal Indian and Western North Pacific monsoon indices. The meridional tripole structure of intraseasonal convection from the Western North Pacific to East Asia and the baroclinic structure of intraseasonal circulation anomalies centered over Korean peninsula provided a favorable condition for the extreme rainfall(90 percentile) events to occur.

Climate change is not only abnormal condition of climate systems but also the perplexities of socio-economic system including agriculture, ocean, energy supply plans and ecosystem. As the frequency and magnitude of the extreme weather related natural disasters are increasing, the losses of lives and economic damages are getting huge. For the adequate response of climate change, more comprehensive reviews of research results about observation, projection and monitoring of climate change are essential. The purpose of this study is to frame, to structure and to prepare writing strategies the 2nd Korea Climate Change Assessment Report(the Physical Science Basis). ‘Korea Climate Change Assessment Report 2010’ was prepared using 1,003 references by 46 climate change scientists with seven chapters and 328 pages. Ten chapters and more detailed sections for the 2nd Korea Climate Change Assessment Report have been suggested based on IPCC 5th Climate Change Assessment Report. Chapters cannot be changed while sections can be combined, deleted, and altered with admissions from consultation committees. Committees consist of climate change experts from government organization, universities and institution.