Guk-Jung Gu

Over the last few decades, there have been startling advances in our understanding of climate system and in modelling techniques. However, the skill of seasonal climate prediction is still not enough to meet the various needs from industrial and public sectors. Therefore, there are tremendous on-going efforts to improve the skill of climate prediction in the seasonal to interannual time scales. Since seasonal to interannual climate variabilities in Korea and East Asia are influenced by many inte

This paper is to assess the state of climate over East Asia and Korea during 2015/ 16 winter. There was a distinct intraseasonal climate variation during the period: the recordbreaking warmth in December 2015 vs. strong cold surge outbreaks in January 2016. It is suggested that the anomalous warming in December 2015 was contributed by an intensification of Kuroshio anticyclone associated with 2015/16 El Niño and polar vortex intensification. In January 2016, a strong cold surge outbroke over Eas

Though tropical SST anomalies associated with El Niñochange slowly during the mature phase of El Niño, the resultantextratropical teleconnection patterns are quite different with time. Inthis study, the intra-winter changes in the teleconnection patternassociated with El Niño are investigated using the NCEP reanalysisand observational data and the high-resolution seasonal predictiondata. The observational analyses show that there are distinctivelychanges in the teleconnection pattern over the No

The sensitivity of the precipitation responses to greenhouse warming can depend on the present-day climate. In this study, a robust linkage between the present-day precipitation climatology and precipitation change owing to global warming is examined in inter-model space. A model with drier climatology in the present-day simulation tends to simulate an increase in climatological precipitation owing to global warming. Moreover, the horizontal gradient of the present-day precipitation climatology

Recently, several studies pointed out that there are distinct two types of El Niñoevents based on the spatial pattern of SST. Since the two types of El Niño have differentimpacts on global climate, it is quite important to identify the type to assess and predict theregional climate variability. So far, however, there are still many different definitions to identifythe two types of El Niño from the different studies. In this study, we investigated a sensitivityof the impacts on climate variabilit

Weather and climate extremes exert devastating influence on human society and ecosystem around the world. Recent observations show increase in frequency and intensity of climate extremes around the world including East Asia. In order to assess current status of the observed changes in weather and climate extremes and discuss possible mechanisms, this study provides an overview of recent analyses on such extremes over Korea and East Asia. It is found that the temperature extremes over the Korean

The changes in the teleconnection associated with El Niño-Southern Oscillation (ENSO) over the East Asia and North Pacific under greenhouse warming are analyzed herein by comparing the Historical run (1970/1971∼1999/2000) and the Representative Concentration Pathway (RCP) 4.5 run with 31 climate models, participated in the Coupled Model Intercomparison Project Phase 5 (CMIP5). It is found that CMIP5 models have diverse systematic errors in simulating the ENSO teleconnection pattern from model t

This study investigates the impacts ofmarginal sea surface temperature (SST) on temperature variations over the Korean Peninsula in winter via observation data analysis and numerical model simulation. The marginal SST variability is represented using ocean temperature variations at the IeodoOcean Research Station (IORS),wherein the oceanic and atmospheric variables are observed in real-time. The wind efficiency is defined as the Korean temperature response to given winds related to variability o

Since the Korean Meteorological Society was organized in 1963, the climate dynamicsfields have been made remarkable progress. Here, we documented the academic developmentsin the area of climate dynamics performed by members of Korean MeteorologicalSociety, based on studies that have been published mainly in the Journal of Korean MeteorologicalSociety, Atmosphere, and Asia-Pacific Journal of Atmospheric Sciences. In these journals,the fundamental principles of typical ocean-atmosphere climatic ph