The combined effect of the Arctic Oscillation (AO) and Western Pacific (WP) teleconnection pattern on temperature variation during winter in northern hemisphere East Asia over last 56 years (1958/1959–2013/2014) was investigated using NCEP/NCAR reanalysis data. study results revealed that AO could be changed depending phase WP North Pacific. negative relationship between (25–45°N, 110–145°E) increased when were in-phase with each other. Hence, (positive) accompanied by WP, anomalies dominant...

ABSTRACT In this study, the regional climate of Korean Peninsula is dynamically downscaled using a high‐resolution model forced by two representative concentration pathway scenarios Hadley Centre Global Environmental Model version 2‐Atmosphere and Ocean (HadGEM2‐AO) multiple models. Changes in extreme precipitation indices are investigated. Through evaluation present climate, multi‐model ensemble reasonably reproduces long‐term climatology over South Korea despite some systematic errors....

Abstract The 2019/20 winter was extremely warm globally and in the Northern Hemisphere extratropics. main cause of climate extremes particularly East Asia, extreme positive Arctic Oscillation (AO) event superimposed on steady global warming. negligible trend AO over preceding 41 years makes it possible to distinguish roles warming observed extremes. We estimate compare contributions January–March 2020 by represented local temperature trends using ERA5 reanalysis data. Based results from a...

Abstract An extreme heatwave, in terms of intensity and duration, is projected to occur at the end 21st century (2071–2100) over whole East Asia. The projection calculated using daily maximum temperature data 25 km horizontal resolution produced by 12 general circulation model-regional climate model chains participating CORDEX-East Asia Phase 2 project. ‘extreme’ heatwave defined as one which magnitude (HWM), accumulated a during period, higher than 95th percentile HWM for reference period...

Abstract This study examines the spatiotemporal characteristics of summer monsoon rainy season over East Asia using six regional climate models (RCMs) participating in Coordinated Regional Domain Experiment (CORDEX) Phase II project. The framework combining multiple global (GCMs) with RCMs produces a larger spread than driving GCMs only, enabling better quantification uncertainty factors. On average, RCM simulations reproduce observed duration and area corresponding boundary GCMs, implying...

Abstract This study investigates the capability of regional climate model, RegCM3, to simulate fine‐scale over a narrow peninsula or archipelago. The model is run in one‐way double‐nested mode with one mother domain and two nested domains. encompasses eastern southern regions Asia adjacent oceans grid spacing 60 km. first focuses on Korean second covers Philippine archipelago 20 simulation spans period 5 years 1 month, from November 2000 December 2004. sensitivity convection schemes, namely,...

The potential dynamical predictability of the winter Arctic Oscillation (AO) is investigated using ensemble hindcast from Pusan National University coupled general circulation model (PNU-CGCM) over 30-year period 1981–2010. analysis indicates that PNU-CGCM can not only reproduce spatial distribution AO but also significantly simulate AO's temporal variability. In addition, performs well in terms predicting impact on Northern Hemisphere climate. These results reveal model's for forecasting...

Abstract With the acceleration in global warming, extreme hot temperatures have emerged as one of most prominent risks. In this study, we characterize unprecedented that occurred Korea summer 2018, and attempt to explain how locally observed event can be interpreted context 2 °C 3 warming above pre-industrial level. To better resolve geographically diverse climate features enhance confidence future changes, three projections are dynamically downscaled using regional models customized over...

This study investigates the effects of North Pacific sea surface temperature (NP SST) anomalies on East Asian winter (T EA ), and relationship between Arctic Oscillation (AO) NP SST in association with T . Time‐lagged correlation analysis revealed that third mode September–October–November (SON) mean (“SON 3rd mode”) AO index for November (“Nov AO”) are closely related to , further first second modes associated Decadal (PDO) America (PNA) patterns, respectively. reveals when SON Nov have a...

Abstract Early detection of extreme drought and flood events either over the whole globe or a broad geographical region, timely dissemination this information, is indispensable for mitigation disaster preparedness. Recently, APEC Climate Center (APCC) has launched global precipitation variation monitoring product based on Anomaly Monitoring System‐Outgoing Longwave Radiation Precipitation Index (CAMS‐OPI) data. Here we quantify reliability CAMS‐OPI, as well other gauge‐satellite‐merged...

This study evaluates the performance of regional climate model RegCM4, which incorporates Biosphere–Atmosphere Transfer Scheme (BATS) and Community Land Model (CLM3) land-surface schemes, in simulating summer precipitation over East Asia. The characteristics are analysed terms mean amount, frequency intensity daily precipitation. results show that simulation is significantly sensitive to choices schemes. Despite several deficiencies, with CLM3 exhibits superior BATS. BATS tends...

Abstract The boreal summer‐blocking regions were defined using the reanalysis data over three decades of 1981–2010, and influence blocking on atmospheric circulation in East Asia was examined. summer occurred mostly North Europe, Ural region, Sea Okhotsk (OK), northeastern Pacific. major mode these four according to principal component analysis 500 hPa geopotential heights. Among regions, OK frequencies (OK BFs) showed negative positive correlations with temperature precipitation Northeast...

Abstract Improved daily precipitation estimations were attempted using the parameter-elevation regressions on a regression independent slopes model (PRISM) with inverse-distance weighting (IDW) and precipitation-masking algorithm for areas. The PRISM (PRISM_ORG) suffers two overestimation problems when is estimated: of intensity in mountainous regions local In order to solve problem overestimating intensity, we used IDW technique that employs same input stations as those (PRISM_IDW). A...

This study compares the bias correction techniques of empirical quantile mapping (QM) and Long Short-Term Memory (LSTM) machine learning model for summertime daily rainfall simulation focusing on precipitation-dependent temporal variation. Numerical experiments using Weather Research Forecasting (WRF) were conducted over South Korea with lateral boundary conditions ERA5 reanalysis data. For spatial distribution mean rainfall, bias-uncorrected WRF (WRF_RAW) showed dry most region Korea. The...

The Simplified Wet Bulb Globe Temperature (sWBGT) is widely used in heat stress assessments for climate-change studies, but its limitations have not been thoroughly explored. Building on recent critiques of sWBGT's use current climate global scale, this study examines biases using dynamically-downscaled sub-daily projections under multiple future emission scenarios. analysis aimed at understanding caveats the application sWBGT and uncertainties existing change dependent sWBGT. Results...