Projections of high resolution climate changes for South Korea using multiple-regional climate models based on four RCP scenarios. Part 2: precipitation

被引:0
作者
Seok-Geun Oh
Myoung-Seok Suh
Young-Suk Lee
Joong-Bae Ahn
Dong-Hyun Cha
Dong-Kyou Lee
Song-You Hong
Seung-Ki Min
Seong-Chan Park
Hyun-Suk Kang
机构
[1] Kongju National University,Department of Atmospheric Sciences
[2] Pusan National University,Department of Atmospheric Sciences
[3] Ulsan National Institute of Science and Technology,School of Urban and Environmental Engineering
[4] Seoul National University,School of Earth and Environmental Sciences
[5] Korea Institute of Atmospheric Prediction Systems,School of Environmental Science and Engineering
[6] Pohang University of Science and Technology,Department of Atmospheric Sciences
[7] Korea Meteorological Administration,undefined
[8] National Institute of Meteorological Sciences,undefined
[9] Kongju National University,undefined
来源
Asia-Pacific Journal of Atmospheric Sciences | 2016年 / 52卷
关键词
Future precipitation changes; five regional climate models; ensemble; RCP scenarios; South Korea;
D O I
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中图分类号
学科分类号
摘要
Precipitation changes over South Korea were projected using five regional climate models (RCMs) with a horizontal resolution of 12.5 km for the mid and late 21st century (2026-2050, 2076- 2100) under four Representative Concentration Pathways (RCP) scenarios against present precipitation (1981-2005). The simulation data of the Hadley Centre Global Environmental Model version 2 coupled with the Atmosphere-Ocean (HadGEM2-AO) was used as boundary data of RCMs. In general, the RCMs well simulated the spatial and seasonal variations of present precipitation compared with observation and HadGEM2-AO. Equal Weighted Averaging without Bias Correction (EWA_NBC) significantly reduced the model biases to some extent, but systematic biases in results still remained. However, the Weighted Averaging based on Taylor’s skill score (WEA_Tay) showed a good statistical correction in terms of the spatial and seasonal variations, the magnitude of precipitation amount, and the probability density. In the mid-21st century, the spatial and interannual variabilities of precipitation over South Korea are projected to increase regardless of the RCP scenarios and seasons. However, the changes in area-averaged seasonal precipitation are not significant due to mixed changing patterns depending on locations. Whereas, in the late 21st century, the precipitation is projected to increase proportionally to the changes of net radiative forcing. Under RCP8.5, WEA_Tay projects the precipitation to be increased by about +19.1, +20.5, +33.3% for annual, summer and winter precipitation at 1-5% significance levels, respectively. In addition, the probability of strong precipitation (≥ 15 mm d-1) is also projected to increase significantly, particularly in WEA_Tay under RCP8.5.
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页码:171 / 189
页数:18
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