Simulation Skills of RegCM4 for Regional Climate over CORDEX East Asia driven by HadGEM2-AO

Oh, Seok‐Geun; Suh, Myoung‐Seok; Cha, Dong‐Hyun; Choi, Seok Reyol

doi:10.5467/jkess.2011.32.7.732

Cited by 12 publications

(5 citation statements)

References 24 publications

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“…(Suh and Lee, 2004;Zhai et al, 2005;Oh et al, 2011;Hong et al, 2013;Lee and Hong, 2014). (Kwon, 1995;Kwon et al, 2008;Kim, 2013;Park, 2015), 둘째로는 서리의 시공간 변화에 관 한 연구로 최근 지구온난화로 인한 최저기온 상 승이 서리일수를 감소시키고 있다는 연구가 있 다 (Bonsal et al, 2001;Frich et al, 2002;Shim et al, 2008).…”

Section: 특히 극한 기후 현상의 발생빈도와 강도가 과거에unclassified

A Study on the Spatio-Temporal Variations of Frost Days (First/Last Frost Date) in South Korea Using Climate Change Scenarios

Bae¹,

Bae²,

Suh³

2017

Journal of Climate Research

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: In this study, the spatio-temporal variations and trends of frost events (total frost days, first/last frost date) in South Korea were investigated using RegCM4.0 simulation data based on two RCP(4.5, 8.5) scenarios. To evaluate the performance of RegCM4.0 for the current (1981-2010) frost events, the daily minimum temperature of 49 observation sites in South Korea were used. Generally, the RegCM4.0 reasonably simulated the spatial characteristics of frost events, but the first (last) frost date was simulated by about 6.6 (3.3) days earlier (later) than that of the observation. As the results, the simulated number of the total frost days was 10.8 days greater than that of the observation. In the mid21st century , the first(last) frost date was projected to be delayed (bring forwarded) by about 7.9(3.1) days in RCP4.5 and about 9.6(2.3) days in RCP8.5, respectively. And the first(last) frost date in the late 21st century(2071-2100) is projected to be delayed (bring forwarded) by about 14.5(15.0) days in RCP4.5 and about 22.2(23.5) days in RCP8.5, comparing to the current climate. These changes could induce a significant decrease of the number of total frost days by about 26.5(47.7) days in the late 21st century under RCP4.5(RCP8.5). And the interannual variability of frost events under RCP4.5(RCP8.5) was projected to be relatively higher(smaller) in the mid-21st century than in the late 21st. The results indicated that the extreme frost events is expected to increase in the mid-21st century under RCP4.5, while in the late 21st century under RCP8.5, comparing to the current climate.

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Section: 특히 극한 기후 현상의 발생빈도와 강도가 과거에unclassified

A Study on the Spatio-Temporal Variations of Frost Days (First/Last Frost Date) in South Korea Using Climate Change Scenarios

Bae¹,

Bae²,

Suh³

2017

Journal of Climate Research

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“…The representative international intercomparison projects, the Coupled Models Intercomparison Project phase 5 and the Coordinated Regional Climate Downscaling Experiment (CORDEX), have been producing diverse climatological information on both global and regional scales with the guidance of the RCP scenarios [e.g., Oh et al ., ; Giorgi et al ., ; Taylor et al ., ; Suh et al ., ; Baek et al ., ; Lee et al ., ; Su et al ., ; Zou and Zhou , ]. Meanwhile, a dynamic downscaling approach using regional climate models (RCMs) has been popularly used in order to produce high‐resolution regional climatology; this method was first adopted to overcome limitations in global climate models (GCMs) that has coarse spatial resolution (grid spacing ~100 km) and rather simple physical representation in the 1990s [e.g., Giorgi , ; Giorgi et al ., ; Juang et al ., ; Lee and Suh , ; Suh and Lee , ; Kang et al ., ].…”

Section: Introductionmentioning

confidence: 98%

Assessment of the RegCM4 over East Asia and future precipitation change adapted to the RCP scenarios

Park

Lee

et al. 2014

J. Geophys. Res. Atmos.

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105

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In this study, we investigated spatial and temporal changes in precipitation over the Coordinated Regional Climate Downscaling Experiment (CORDEX) East Asia domain, for present (1986)(1987)(1988)(1989)(1990)(1991)(1992)(1993)(1994)(1995)(1996)(1997)(1998)(1999)(2000)(2001)(2002)(2003)(2004)(2005) and future (2031-2050) periods using the Regional Climate Model version 4 (RegCM4). Future meteorology produced by the Hadley Center Global Environmental Model version 2 coupled with the Atmosphere-Ocean (HadGEM2-AO) following global climate change scenarios (Representative Concentration Pathways (RCP) 4.5 and 8.5) was used as meteorological boundary conditions for the RegCM4. Six subregions (South Korea, North China, South China, Japan, Mongolia, and India) in the CORDEX East Asia domain were considered for analysis. The RegCM4 simulated spatial distributions of precipitation over East Asia with a correlation coefficient of 0.7 against Climate Research Unit data. The simulation skills of its temporal variability varied based on geographical regions and seasons, showing relatively poorer performance (underestimation in rainfall amount) in summer than in winter, in general. The future climate simulations by the RegCM4 presented that the East Asian continental regions will be warmer and more humid, leading to increased precipitation amounts, especially in the summer. The summer precipitation amount was projected to increase by about 5%, on average, over the East Asian domain, 5À15% in most subregions, and even higher (44% and 24%) in the South Korean region for the RCP 4.5 and 8.5 scenarios, respectively. It was also expected that heavy rainfall (> 50 mm/d) events may occur more frequently in the future possibly owing to meteorological changes that are favorable to convective heavy precipitation.

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“…by: HadGEM3-RA (Hadley Centre Global Environment Model, version 3, with regional atmosphere configurations) (Martin et al 2006); MM5 (Fifth-generation Pennsylvania State University-National Center for Atmospheric Research Mesoscale Model) (Lee, Cha, and Kang 2004); RegCM4 (Regional Climate Model, version 4) (Oh et al 2011); WRF (Weather Research and Forecasting model,version 3.2) (Skamarock et al 2008), and RSM (Regional Spectral Model) (Hong et al 2013). Each model is driven using the output of HadGEM2-AO (Hadley Centre Global Environment Model, version 2, with atmosphere, ocean and sea ice configurations) (Baek et al 2013).…”

Section: Introductionmentioning

confidence: 99%

Evaluation of CORDEX regional climate models in simulating temperature and precipitation over the Tibetan Plateau

Guo

Sun

2018

Atmospheric and Oceanic Science Letters

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Using a regional climate model (RCM) is generally regarded as a promising approach in researching the climate of the Tibetan Plateau, due to the advantages provided by the high resolutions of these models. Whilst previous studies have focused mostly on individual RCM simulations, here, multiple RCMs from the Coordinated Regional Climate Downscaling Experiment are evaluated in simulating surface air temperature and precipitation changes over the Tibetan Plateau using station and gridded observations. The results show the following: (1) All RCMs consistently show similar spatial patterns, but a mean cold (wet) bias in the temperature (precipitation) climatology compared to station observations. The RCMs fail to reproduce the observed spatial patterns of temperature and precipitation trends, and on average produce greater trends in temperature and smaller trends in precipitation than observed results. The multi-model ensemble overall produces superior trends in both simulated temperature and precipitation relative to individual models. Meanwhile, RegCM4 presents the most reasonable simulated trends among the five RCMs. (2) Considerable dissimilarities are shown in the simulated quantitative results from the different RCMs, which indicates a large model dependency in the simulation of climate over the Tibetan Plateau. This implies that caution may be needed when an individual RCM is used to estimate the amplitude of climate change over the Tibetan Plateau. (3) The temperature (precipitation) in 2016-35, relative to 1986-2005, is projected by the multi-model ensemble to increase by 1.38 ± 0.09 °C (0.8% ± 4.0%) and 1.77 ± 0.28 °C (7.3% ± 2.5%) under the RCP4.5 and RCP8.5 scenario, respectively. The results of this study advance our understanding of the applicability of RCMs in studies of climate change over the Tibetan Plateau from a multiple-RCM perspective.

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Simulation Skills of RegCM4 for Regional Climate over CORDEX East Asia driven by HadGEM2-AO

Cited by 12 publications

References 24 publications

A Study on the Spatio-Temporal Variations of Frost Days (First/Last Frost Date) in South Korea Using Climate Change Scenarios

A Study on the Spatio-Temporal Variations of Frost Days (First/Last Frost Date) in South Korea Using Climate Change Scenarios

Assessment of the RegCM4 over East Asia and future precipitation change adapted to the RCP scenarios

Evaluation of CORDEX regional climate models in simulating temperature and precipitation over the Tibetan Plateau

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