The Impact of Population Dead Cross Phenomenon on the SECURITY of the Korean Peninsula

2021 ◽  
Vol 6 (4) ◽  
pp. 1-12
Author(s):  
Sejin Seol
Keyword(s):  
Korean Peninsula ◽  
The Impact

scholarly journals Mesoscale Spatial Variability of Linear Trend of Precipitation Statistics in Korean Peninsula

2016 ◽  
Vol 2016 ◽  
pp. 1-15 ◽  
Author(s):  
Jaehyeon Lee ◽  
Jaehyun Ahn ◽  
Eunsoo Choi ◽  
Dongkyun Kim
Keyword(s):  
Spatial Variability ◽  
Korean Peninsula ◽  
Temporal Trend ◽  
Linear Trend ◽  
Kendall Test ◽  
Characteristic Scale ◽  
Management Plans ◽  
The Impact ◽  
Mean Variance ◽  
Approximate Characteristic

This study analyzed the spatial variability of the linear trend of the precipitation mean, variance, lag-1 autocorrelation coefficient, and probability of dryness (PD) based on the precipitation data between 1981 and 2015 observed at 65 rain gages located across Korean Peninsula. While the result of the Mann-Kendall test based on the yearly statistics showed no temporal trend at most of the gage locations, the same test based on the 20-yearly statistics showed that statistically significant temporal trend exists at 54% (mean), 60% (variance), 61% (autocorrelation), and 61% (PD) among the total 65 rain gages. In addition, this study produced the map of the linear trend of the precipitation statistics. The map showed a clear regional and seasonal tendency implying that the impact of the climate change varies significantly within Korea. The variogram analysis revealed that the approximate characteristic scale of linear trend of hourly and daily precipitation statistics ranges between 50 km and 200 km and between 100 km and 250 km, respectively. This characteristic scale is significantly smaller than the spatial scale of atmospheric circulation, which suggests that future water resources management plans of Korea should consider this mesoscale variability that otherwise can be missed if it is based only on the GCM simulation results.

The Impact of US and China on ROK–DPRK Relations, 1993–2019

Asian Survey ◽  
2021 ◽  
pp. 1-28
Author(s):  
Alec Chung ◽  
Ki Eun Ryu
Keyword(s):  
Statistical Analysis ◽  
Power Distribution ◽  
Korean Peninsula ◽  
Great Powers ◽  
Event Data ◽  
The Us ◽  
The Impact ◽  
The Relationship

The relationship between the ROK and DPRK is bound to be affected by the two great powers—the US and China. Especially in recent decades, the power gap between the two great powers has continued to narrow. Given this, how is the geopolitical situation surrounding the Korean Peninsula shaping inter-Korean relations? This study uses event data and statistical analysis to explore the geopolitical factors that shaped inter-Korean relations from 1993 to 2019. We find that DPRK–ROK relations deteriorated as the power gap between the US and China narrowed. Also, inter-Korean relations were positive when DPRK–US relations were positive. In short, we conclude that during the shift in the US–China power distribution, maintaining positive DPRK–US relations while also managing inter-Korean relations peacefully is necessary for peace on the Korean Peninsula.

scholarly journals The Korean Nuclear Imbroglio: Can India be a Muted Spectator?

2018 ◽  
Vol 17 (4) ◽  
pp. 17-34
Author(s):  
Sitakanta Misra
Keyword(s):  
East Asia ◽  
Nuclear Weapons ◽  
Korean Peninsula ◽  
North Korea ◽  
Spillover Effects ◽  
North Asia ◽  
Perceived Security ◽  
The Impact

The presence of nuclear weapons in North Korea has complicated the strategic scenario in North Asia in general and Korean peninsula in particular. Unless the perceived ‗security deficit‘ with North Korea, due to its nuclear weapons‘ programme is amicably addressed, especially by reducing America‘s dominant presence in the region, demanding North Korea‘s denuclearisation would be unrealistic. Thus, the nuclear imbroglio in Korean Peninsula would endure. The outcomes of the Korean crisis will have serious spillover effects on South and East Asia. As a ‗rising‘ super power, India needs to reflect on her role in the unfolding strategic scene in its extended neighbourhood. This article provides an analysis of the strategic condition India is in and the impact of intervening in nuclear issues involving Super Powers in South and East Asia.

scholarly journals Impacts of Upstream Structures on Downstream Discharge in the Transboundary Imjin River Basin, Korean Peninsula

2020 ◽  
Vol 10 (9) ◽  
pp. 3333
Author(s):  
Doan Thi Thu Ha ◽  
Seon-Ho Kim ◽  
Deg-Hyo Bae
Keyword(s):  
River Basin ◽  
Korean Peninsula ◽  
Water Levels ◽  
Dam Failure ◽  
Water Release ◽  
Transboundary River Basin ◽  
Operational Rule ◽  
Dam Operation ◽  
Effective Use ◽  
The Impact

The transboundary river basin is a great challenge for water management and disaster reduction due to its specific characteristics. In this study, upstream impacts from natural and artificial sources on the downstream discharge on the Imjin river basin, the well-known transboundary region in the Korean peninsula, were evaluated using a hydrological model integrating a dam operation module at an hourly timescale. The module uses a concept of the AutoROM method as the operational rule to update the dam storage and decide water release. Dam storages were translated into water levels using a water level–storage curve. To quantify the impact of hydraulic structures on the Northern Imjin river basin, change in discharge was analyzed in four flood events (2009, 2010, 2011, and 2012). Dam failure scenarios were developed under conditions of the 2010 flood event, in which the releases of 100%, 80%, 50%, and 20% of water storage of Hwanggang dam were simulated. The results indicate that the amount of water released from upstream dams is the main cause of floods in the downstream region. To reduce the risk of floods in the downstream river basin, an optimal dam operation module and information on upstream dams play an important role and contribute to the effective use of water resources.

scholarly journals Revision of WDM7 Microphysics Scheme and Evaluation for Precipitating Convection over the Korean Peninsula

2021 ◽  
Vol 13 (19) ◽  
pp. 3860
Author(s):  
Sungbin Jang ◽  
Kyo-Sun Sunny Lim ◽  
Jeongsu Ko ◽  
Kwonil Kim ◽  
GyuWon Lee ◽  
...  
Keyword(s):  
Korean Peninsula ◽  
Solid Phase ◽  
Terminal Velocity ◽  
Cloud Microphysics ◽  
Probability Of Detection ◽  
Fall Velocity ◽  
Microphysics Scheme ◽  
Simulated Precipitation ◽  
Relationship Of ◽  
The Impact

The Weather Research and Forecasting (WRF) Double-Moment 7-Class (WDM7) cloud microphysics scheme was developed to parameterize cloud and precipitation processes explicitly for mesoscale phenomena in the Korean Integrated Model system. However, the WDM7 scheme has not been evaluated for any precipitating convection system over the Korean peninsula. This study modified WDM7 and evaluated simulated convection during summer and winter. The suggested modifications included the integration of the new fall velocity–diameter relationship of raindrops and mass-weighted terminal velocity of solid-phase precipitable hydrometeors (the latter is for representing mixed-phase particles). The mass-weighted terminal velocity for snow and graupel has been suggested by Dudhia et al. (2008) to allow for a more realistic representation of partially rimed particles. The WDM7 scheme having an additional hail category does not apply this terminal velocity only for hail. Additionally, the impact of enhanced collision-coalescence (C-C) efficiency was investigated. An experiment with enhanced C-C efficiency overall improved the precipitation skill scores, such as probability of detection, equitable threat score, and spatial pattern correlation, compared with those of the control experiment for the summer and winter cases. With application of the new mass-weighted terminal velocity of solid-phase hydrometeors, the hail mixing ratio at the surface was considerably reduced, and rain shafts slowed down low-level winds for the winter convective system. Consequently, the simulated hydrometeors were consistent with observations retrieved via remote sensing. The fall velocity–diameter relationship of raindrops further reduced the cloud ice amount. The proposed modifications in our study improved the simulated precipitation and hydrometeor profiles, especially for the selected winter convection case.

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