File Download

There are no files associated with this item.

  • Find it @ UNIST can give you direct access to the published full text of this article. (UNISTARs only)
Related Researcher

차동현

Cha, Dong-Hyun
High-impact Weather Prediction Lab.
Read More

Views & Downloads

Detailed Information

Cited time in webofscience Cited time in scopus
Metadata Downloads

Impacts of Synoptic and Regional Factors on Heat Wave Events over Southeastern Region of Korea in 2015

Author(s)
Yoon, Dong HyuckLee, GilMin, Ki-HongCha, Dong-Hyun
Issued Date
2018-06-05
URI
https://scholarworks.unist.ac.kr/handle/201301/36435
Citation
AOGS 15th Annual Meeting
Abstract
In this study, the impacts of synoptic and regional factors on heat waves occurred over southeastern region of Korea in 2015 are investigated using a cluster analysis and numerical experiments. Heat wave events during 1980-2016 defined by three spatiotemporal criteria are classified into three clusters by using the k-means clustering analysis method. Each cluster has different synoptic conditions related to the western North Pacific subtropical high and monsoon circulation around South Korea. In addition to the synoptic conditions, high temperature events over southeastern region of South Korea in 2015 summer can be further enhanced by regional factors such as soil moisture amount and a high mountain range. To examine the effect of the local conditions on the 2015 summer heat wave case in South Korea, numerical experiments using a high-resolution Weather Research and Forecasting (WRF) model are conducted. There are four experiments, which are CTL experiment with no change in topography and soil moisture, TOPO experiment with decreased topography height, and WET and DRY experiments with wet and dry anomalies of initial soil moisture. CTL experiment simulates higher minimum temperature at the lee side compared to TOPO experiment because of the Föhn effect. In particular, the effect is prominent when westerly wind passing through mountain blows and the difference of relative humidity between the mountain flanks is significant (i.e., nighttime of dry period). Due to the less (more) evaporation, DRY (WET) experiment with less (more) soil moisture simulates higher (lower) maximum temperature than CTL experiment during the daytime when solar radiation is relatively intense.
Publisher
Asia Oceania Geosciences Society

qrcode

Items in Repository are protected by copyright, with all rights reserved, unless otherwise indicated.