• Title/Summary/Keyword: Climate index

Search Result 920, Processing Time 0.033 seconds

A Study on Vulnerability Assessment to Climate Change in Regional Fisheries of Korea (국내 수산 부문의 지역별 기후변화 취약성 평가 연구)

  • Lee, Beo-Dul;Kim, Bong-Tae;Cho, Yong-Sung
    • The Journal of Fisheries Business Administration
    • /
    • v.42 no.1
    • /
    • pp.57-70
    • /
    • 2011
  • Fisheries are subject to unexpected weather condition. While some change of it may be positive for some fisheries, the current state suggests that the effects will be undesirable for many fisheries. The aim of this study is to assess the vulnerability to climate change in 11 regional fisheries of Korea using the framework of IPCC. The vulnerability assessment depends upon the interrelation of three key elements; exposure, sensitivity and adaptive capacity, which were derived from Analytical Hierarchy Process method in this study. These elements would contribute to comprehend relative importance at the regional characteristics of fisheries. We compared the vulnerability index of 11 regional fisheries so as to look for strategies and adaptation methods to the impacts of potential climate change. Jeoun-Nam, Kyeong-Nam, and Jeju are identified as the most vulnerable provinces to climate change on their fisheries because they have high level of sensitivity to predicted climate change and relatively low adaptive capacity. The relatively low vulnerability of Ulsan, Gyeonggi reflects high financial independence, well-equipped infrastructure, social capital in these regions. Understanding of vulnerability to climate change suggests future research directions. This paper will provide a guide to local policy makers and fisheries managers about vulnerability and adaptation planning to climate change.

Spatial Planning of Climate Adaptation Zone to Promote Climate Change Adaptation for Endangered Species (생물다양성 보전을 위한 기후적응지역 설정 연구 -삵의 서식지를 중심으로-)

  • Lee, Dongkun;Baek, Gyounghye;Park, Chan;Kim, Hogul
    • Journal of the Korean Society of Environmental Restoration Technology
    • /
    • v.14 no.6
    • /
    • pp.111-117
    • /
    • 2011
  • This study attempts to facilitate climate change adaptation in conservation area by spatial planning of climate adaptation zone for endangered species. Spatial area is South Korea and select leopard cat (Prionailurus bengalensis) as a target species of this study. In order to specify the climate adaptation zone, firstly, Maximum entropy method (Maxent) was used to identify suitable habitat, and then core habitat was selected for leopard cat. Secondly, land use resistance index was evaluated and least cost distance was analyzed for target species. In this step we choose dispersal capacity of leopard cat to reflect species ecological characteristic. Finally, climate adaptation zone is described and adaptation measures are suggested. The presented approach could be generalized for application into conservation planning and restoration process. Furthermore, spatial planning of climate adaptation zone could increase heterogeneity of habitat and improve adaptive capacity of species and habitat itself.

On the Property of Climatological Environment with Discomfort Index in Korea (불쾌지수를 이용한 우리나라의 기후학적 환경특성에 관한 연구)

  • 김해동;김수봉
    • Journal of Environmental Science International
    • /
    • v.10 no.2
    • /
    • pp.129-133
    • /
    • 2001
  • The purpose of this study is to examine the property of climatological environment using the daily mean meteorological data measured at the serveral meteorological observatory for 30years(1961~1990). It was found that the distribution of discomfort index tended to mainly depend on the geographical situation in the same season. Major portions of Korea were subjected to continental except for some seaside districts. The discomfort index have a large(small) value in summer(winter) season. And there is a short interval(1 or 2 months) between summer and winter season in Korea.

  • PDF

Flow Behavior and Mixing Characteristics of Rice Husk/Silica Sand/Rice Husk Ash (왕겨/모래/왕겨 회재의 유동 및 혼합 특성 연구)

  • Kim, Bo Hwa;Seo, Myung Won;Kook, Jin Woo;Choi, Hee Mang;Ra, Ho Won;Yoon, Sang Jun;Mun, Tae Young;Kim, Yong Ku;Lee, Jae Goo;Rhee, Young Woo
    • Korean Chemical Engineering Research
    • /
    • v.54 no.4
    • /
    • pp.533-542
    • /
    • 2016
  • We investigate fluidization characteristics of the mixture of rice husk, silica sand and rice husk ash as a preliminary study for valuable utilization of rice husk ash obtained from gasification of rice husk in a fluidized bed reactor. As experiment valuables, the blending ratio of rice husk and sand (rice husk: sand) is selected as 5:95, 10:90, 20:80 and 30:70 on a volume base. Rice husk ash was added with 6 vol% of rice husk for each experiment and air velocity to the reactor was 0~0.63 m/s. In both rice husk/sand and rice husk/sand/ash mixture, the minimum fluidization velocity (Umf) is observed as 0.19~0.21 m/s at feeding of 0~10 vol.% of rice husk and 0.30 m/s at feeding of 20 vol.% of rice husk. With increasing the amount of rice husk up to 30 vol.%, $U_{mf}$ can not measure due to segregation behavior. The mixing index for each experiment is determined using mixing index equation proposed by Brereton and Grace. The mixing index of the mixture of rice husk/sand and rice husk/sand/ash was 0.8~1 and 0.88~1, respectively. The optimum fluidization condition was found for the good mixing and separation of rice husk ash.

Correlation between the Maize Yield and Satellite-based Vegetation Index and Agricultural Climate Factors in the Three Provinces of Northeast China (중국 동북3성에서의 옥수수 수확량과 위성기반의 식생 지수 및 농업기후요소와의 상관성 연구)

  • Park, Hye-Jin;Ahn, Joong-Bae;Jung, Myung-Pyo
    • Korean Journal of Remote Sensing
    • /
    • v.33 no.5_2
    • /
    • pp.709-720
    • /
    • 2017
  • In this study, we tried to analyze the correlation between corn yield and, satellite-based vegetation index, NDVI (Normalized Difference Vegetation Index) and various climatic factors in the three provinces of Northeast China during the past 20 years (1996-2015). The corn yields in the corn cultivation area of all three provinces showed a statistically significant positive correlation with the NDVI of the harvest period. Also, these have significant negative correlation with the daily maximum temperature in August and September and the occurrence frequency of above $30^{\circ}C$ for the summer season. The correlation between the corn yields and the precipitation showed a significant positive coefficient in only Liaoning Province in July, but the correlation was not found in Jilin and Heilongjiang Provinces. In this study, the NDVI and the daily maximum temperature data are suitable to be used as predictors of corn yield in the three provinces of Northeast China provinces.

Development of Estimation Algorithm of Near-Surface Air Temperature for Warm and Cold Seasons in Korea (온난 및 한랭시즌의 우리나라 지상기온 평가 알고리즘 개발)

  • Kim, Do Yong
    • Journal of Korean Society for Geospatial Information Science
    • /
    • v.23 no.4
    • /
    • pp.11-16
    • /
    • 2015
  • Spatial and temporal information on near-surface air temperature is important for understanding global warming and climate change. In this study, the estimation algorithm of near-surface air temperature in Korea was developed by using spatial homogeneous surface information obtained from satellite remote sensing observations. Based on LST(Land Surface Temperature), NDWI(Normalized Difference Water Index) and NDVI(Normalized Difference Vegetation Index) as independent variables, the multiple regression model was proposed for the estimation of near-surface air temperature. The different regression constants and coefficients for warm and cold seasons were calculated for considering regional climate change in Korea. The near-surface air temperature values estimated from the multiple regression algorithm showed reasonable performance for both warm and cold seasons with respect to observed values (approximately $3^{\circ}C$ root mean-square error and nearly zero mean bias). Thus;the proposed algorithm using remotely sensed surface observations and the approach based on the classified warm and cold seasons may be useful for assessment of regional climate temperature in Korea.

Development of Flood Vulnerability Index Considering Climate Change (기후변화를 고려한 홍수취약성지표의 개발)

  • Son, Min-Woo;Sung, Jin-Young;Chung, Eun-Sung;Jun, Kyung-Soo
    • Journal of Korea Water Resources Association
    • /
    • v.44 no.3
    • /
    • pp.231-248
    • /
    • 2011
  • This study aims to develop the Flood Vulnerability Index (FVI) and apply it to the Bukhan River Basin. A1B and A2 scenarios of CGCM3 of IPCC were adopted and SDSM (Statistical Downscaling Model) was used to downscale the original data to the daily data. Driver-Presure-State-Impact-Response (DPSIR) model was introduced to select all appropriate indicators for FVI and the daily rainfall-runoff model was simulated using HSPF (Hydrological Simulation Program-Fortran). Since FIV proposed in this study has a capability to quantify the potential flood vulnerability considering both present and future climate conditions, it is expected to be used for the comprehensive water resources and environmental planning.

Application of Meteorological Drought Index using Climate Hazards Group InfraRed Precipitation with Station (CHIRPS) Based on Global Satellite-Assisted Precipitation Products in Korea (위성기반 Climate Hazards Group InfraRed Precipitation with Station (CHIRPS)를 활용한 한반도 지역의 기상학적 가뭄지수 적용)

  • Mun, Young-Sik;Nam, Won-Ho;Jeon, Min-Gi;Kim, Taegon;Hong, Eun-Mi;Hayes, Michael J.;Tsegaye, Tadesse
    • Journal of The Korean Society of Agricultural Engineers
    • /
    • v.61 no.2
    • /
    • pp.1-11
    • /
    • 2019
  • Remote sensing products have long been used to monitor and forecast natural disasters. Satellite-derived rainfall products are becoming more accurate as space and time resolution improve, and are widely used in areas where measurement is difficult because of the periodic accumulation of images in large areas. In the case of North Korea, there is a limit to the estimation of precipitation for unmeasured areas due to the limited accessibility and quality of statistical data. CHIRPS (Climate Hazards Group InfraRed Precipitation with Stations) is global satellite-derived rainfall data of 0.05 degree grid resolution. It has been available since 1981 from USAID (U.S. Agency for International Development), NASA (National Aeronautics and Space Administration), NOAA (National Oceanic and Atmospheric Administration). This study evaluates the applicability of CHIRPS rainfall products for South Korea and North Korea by comparing CHIRPS data with ground observation data, and analyzing temporal and spatial drought trends using the Standardized Precipitation Index (SPI), a meteorological drought index available through CHIRPS. The results indicate that the data set performed well in assessing drought years (1994, 2000, 2015 and 2017). Overall, this study concludes that CHIRPS is a valuable tool for using data to estimate precipitation and drought monitoring in Korea.

Future Projection and Uncertainty Analysis of Low Flow on Climate Change in Dam Basins (기후변화에 따른 저유량 전망 및 불확실성 분석)

  • Lee, Moon Hwan;Bae, Deg Hyo
    • Journal of Climate Change Research
    • /
    • v.7 no.4
    • /
    • pp.407-419
    • /
    • 2016
  • The low flow is the necessary and important index to establish national water planning, however there are lots of uncertainty in the low flow estimation. Therefore, the objectives of this study are to assess the climate change uncertainty and the effects of hydrological models on low flow estimation. The 5 RCMs (HadGEM3-RA, RegCM4, MM5, WRF, and RSM), 5 statistical post-processing methods and 2 hydrological models were applied for evaluation. The study area were selected as Chungju dam and Soyang river dam basin, and the 30 days minimum flow is used for the low flow evaluation. The results of the uncertainty analysis showed that the hydrological model was the largest source of uncertainty about 41.5% in the low flow projection. The uncertainty of hydrological model is higher than the other steps (RCM, statistical post-processing). Also, VIC model is more sensitive for climate change compared to SWAT model. Therefore, the hydrological model should be thoroughly reviewed for the climate change impact assessment on low flow.