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REFERENCE LINKING PLATFORM OF KOREA S&T JOURNALS
> Journal Vol & Issue
Korean Journal of Agricultural and Forest Meteorology
Journal Basic Information
Journal DOI :
Korean Society of Agricultural and Forest Meteorology
Editor in Chief :
Volume & Issues
Volume 8, Issue 4 - Dec 2006
Volume 8, Issue 3 - Sep 2006
Volume 8, Issue 2 - Jun 2006
Volume 8, Issue 1 - Mar 2006
Selecting the target year
Climate Change Impact on Nonpoint Source Pollution in a Rural Small Watershed
Hwang, Sye-Woon ; Jang, Tae-Il ; Park, Seung-Woo ;
Korean Journal of Agricultural and Forest Meteorology, volume 8, issue 4, 2006, Pages 209~221
The purpose of this study is to analyze the effects of climate change on the nonpoint source pollution in a small watershed using a mid-range model. The study area is a basin in a rural area that covers 384 ha with a composition of 50% forest and 19% paddy. The hydrologic and water quality data were monitored from 1996 to 2004, and the feasibility of the GWLF (Generalized Watershed Loading function) model was examined in the agricultural small watershed using the data obtained from the study area. As one of the studies on climate change, KEI (Korea Environment Institute) has presented the monthly variation ratio of rainfall in Korea based on the climate change scenario for rainfall and temperature. These values and observed daily rainfall data of forty-one years from 1964 to 2004 in Suwon were used to generate daily weather data using the stochastic weather generator model (WGEN). Stream runoff was calibrated by the data of
and was verified in
. The results were determination coeff, (
and root mean square error (RMSE) of
. Water quality simulation for SS, TN and TP showed
values of 0.58, 0.47 and 0.62, respectively, The results for the impact of climate change on nonpoint source pollution show that if the factors of watershed are maintained as in the present circumstances, pollutant TN loads and TP would be expected to increase remarkably for the rainy season in the next fifty years.
Heavy Metal Contents of Forest Soil and Lonicera japonica near Onsan Industrial Region
Park, Eun-Hee ; Cho, Min-Ki ; Yang, Jae-Kyung ; Kim, Jong-Kab ; Moon, Hyun-Shik ;
Korean Journal of Agricultural and Forest Meteorology, volume 8, issue 4, 2006, Pages 222~228
This study was conducted to evaluate the heavy metal content (As, Cd, Cr, Cu, Fe, Mn, Ni, Pb, Zn) of forest soil and of Lonicera japonica and to understand the correlation in contents of heavy metal between forest soil and L. japonica near the Onsan industrial region. The content of As, Cd, Cu, Pb and Zn was higher in the industrial region than in forest regions, but re, Mn and Ni content was higher in forest regions than in the industrial region. Among heavy metals, the content of Cd, Cu, Pb and Zn in leaf, stem and root of L. japonica growing near industrial regions was significantly higher (p<0.05) than in forest regions. The content of As, Cd, Cu, Pb and Zn in L. japonica tissues showed a positive or negative correlation with those in forest soils. Correlation coefficients of Cu content between forest soil and organs of L. japonica ranged from 0.93 to 0.99 (p<0.01). It was concluded that L. japanica could be used in heavy metal (Cd, Cu, Pb, and Zn) decontamination of forest soils of industrial regions.
Evaluation of Site-specific Potential for Rice Production in Korea under the Changing Climate
Chung, U-Ran ; Cho, Kyung-Sook ; Lee, Byun-Woo ;
Korean Journal of Agricultural and Forest Meteorology, volume 8, issue 4, 2006, Pages 229~241
Global air temperature has risen by
over the last one hundred years due to increased atmospheric greenhouse gases. Moreover, this global warming trend is projected to continue in the future. This study was carried out to evaluate spatial variations in rice production areas by simulating rice-growth and development with projected high resolution climate data in Korea far 2011-2100, which was geospatially interpolated from the 25 km gridded data based on the IPCC SRES A2 emission scenario. Satellite remote sensing data were used to pinpoint the rice-growing areas, and corresponding climate data were aggregated to represent the official 'crop reporting county'. For the simulation experiment, we used a CERES-Rice model modified by introducing two equations to calculate the leaf appearance rate based on the effective temperature and existing leaf number and the final number of leaves based on day-length in the photoperiod sensitive phase of rice. We tested the performance of this model using data-sets obtained from transplanting dates and nitrogen fertilization rates experiments over three years (2002 to 2004). The simulation results showed a good performance of this model in heading date prediction [
=0.9586 for early (Odaebyeo),
=0.9681 for medium (Hwasungbyeo), and
=0.9477 for late (Dongjinbyeo) maturity cultivars]. A modified version of CERES-Rice was used to simulate the growth and development of three Japonica varieties, representing early, medium, and late maturity classes, to project crop status for climatological normal years between 2011 and 2100. In order to compare the temporal changes, three sets of data representing 3 climatological years (2011-2040, 2041-2070, and 2071-2100) were successively used to run the model. Simulated growth and yield data of the three Japonica cultivars under the observed climate for 1971-2000 was set as a reference. Compared with the current normal, heading date was accelerated by 7 days for 2011-2040 and 20 days for 2071-2100. Physiological maturity was accelerated by 15 days for 2011-2040 and 30 days for 2071-2100. Rice yield was in general reduced by 6-25%, 3-26%, and 3-25% per 10a in early, medium, and late maturity classes, respectively. However, mid to late maturing varieties showed an increased yield in northern Gyeonggi Province and in most of Kwangwon Province in 2071-2100.
Geographical Shift of Quality Soybean Production Area in Northern Gyeonggi Province by Year 2100
Seo, Hee-Cheol ; Kim, Seong-Ki ; Lee, Young-Soo ; Cho, Young-Cheol ;
Korean Journal of Agricultural and Forest Meteorology, volume 8, issue 4, 2006, Pages 242~249
Potential impacts of the future climate change on crop production can be inferred by crop simulations at a landscape scale, if the climate data may be provided at appropriate spatial scales. Northern Gyunggi Province is one of the few prospective regions in South Korea for growing quality soybeans. Any geographical shift of production areas under the changing climate may influence the current land planning policy in this region. A soybean growth simulation was performed at 342 land units in northern Gyunggi province to test the potential geographical shift of the current production areas for quality soybeans in the near future (form 2011 to 2100). The land units for soybean cultivation were selected by the land use, the soil characteristics, and the minimum arable land area. Daily maximum and minimum temperature, precipitation, the number of rain days and solar radiation were extracted for each land unit from the future digital climate models (DCM, 2011-2040, 2041-2070, 2071-2100). Daily weather data for 30 years were randomly generated for each land unit for each normal year by using a well-known statistical method. They were used to run CROPGRO-Soybean model to simulate the growth, phonology, and yields of 3 cultivars representing different maturity groups grown at 342 land units. According to the model calculations, the warming trend in this region will accelerate the flowering and physiological maturity of all cultivars, resulting in a 7 to 9 days reduction in overall growing season and a 1 to 15% reduction in grain yield of early to medium maturity cultivars. There was a slight increase in grain yield of the late maturing cultivar under the projected climate by 2070, but a decreasing tend was dominant by the year 2100.
An Analysis of Forest Fire Occurrence Hazards by Changing Temperature and Humidity of Ten-day Intervals for 30 Years in Spring
Won, Myoung-Soo ; Koo, Kyo-Sang ; Lee, Myung-Bo ;
Korean Journal of Agricultural and Forest Meteorology, volume 8, issue 4, 2006, Pages 250~259
This study looks into forest fire occurrence hazards according to the change of temperature and humidity over thirty years at interval of ten days. We used data from the forest fire inventory from 1995 to 2004 and weather data such as average temperature and relative humidity for 30 years from 1971 to 2000. These data were expressed as a database with ten-day intervals for 76 weather stations. Forest fire hazards occurred in the spring season from the end of March to the middle of April. For the first step, the primitive surface of temperature and humidity was interpolated by IDW (the standard interpolation method). These thematic maps have a 1 km by 1 km grid spacing resolution. Next, we executed a simple regression analysis after extracting forest fire frequency, temperature and humidity values from 76 weather stations. The results produced a coefficient of determination (
) ranging from 0.4 to 0.6. Moreover, the estimation of forest fire occurrence hazards during early April was very high at Gyeongbuk Interior, Chungcheong Interior and part of Gangwon. The range of temperature and humidity having an influence on forest fire occurrence was as follows: average temperature and relative humidity in early April was
and 61-65%. At the end of March, temperature was
, humidity 62-67%, and temperature was
and humidity 60-67% in the middle of April.
Vegetation Structure around Natural Trails in Mt. Jiri National Park
Cho, Gyu-Nam ; Kim, Deok-Sung ; Cho, Min-Gee ; Jung, Hye-Ran ; Moon, Hyun-Shik ;
Korean Journal of Agricultural and Forest Meteorology, volume 8, issue 4, 2006, Pages 260~269
This study was conducted to provide basic information for effective management strategies on nature trails in Mt. Jiri national park. Vegetation structure of nature trails in Yupyeong, Jungsanri, Hadong and Baekmudong districts was researched to accomplish the purpose of study. The tree and subtree layer consisted of 16 and 11 species for Yupyeong, 14 and 16 species for Jungsanri, 10 and 13 species for Hadong, and 19 and 10 species for Baekmudong district, respectively. The importance value of Quercu variabilis in the tree layer was highest for Yupyeong, Jungsanri and Baekmudong districts, and that of Pinus densiflora was highest for Hadong district. The herbaceous layer was composed of 70 species for Yupyeong, 53 species for Jungsanri, 65 species for Hadong, 57 species for Baekmudong districts, respectively. The value of species diversity ranged from 0.752 to 1.162, 0.957 to 1.085 and 1.283 to 1.506 at tree, subtree and shrub layer, respectively. Evenness ranged 0.752 to 0.983 at all layers for four nature trails in Mt. Jiri national park.
A Study on the Development of a High Resolution Snow Gauge
Lee, Bu-Yong ;
Korean Journal of Agricultural and Forest Meteorology, volume 8, issue 4, 2006, Pages 270~274
This study proposes a new method for automatic recording of snowfall by a mass unit which is required in weather forecast and hydrology research. In this method the weight of a buoyancy bar submerged in a liquid is measured by a strain-gauge loadcell. Field test results of the strain-gauge loadcell showed good stability as well as high accuracy. Indoor tests of the instrument using a large tank of 120 cm diameter and 25 cm height connected to a small tank measured the liquid level with a good stability, showing a measurement error of less than 0.1 mm in a 100 mm range. This method of water depth measurement is very useful in measuring snowfall because it has no limitation on the funnel size of the instrument. In addition, an antifreezing solution instead of water used in the tank makes a heating system for melting snow unnecessary.
Using Google Earth for a Dynamic Display of Future Climate Change and Its Potential Impacts in the Korean Peninsula
Yoon, Kyung-Dahm ; Chung, U-Ran ; Yun, Jin-I. ;
Korean Journal of Agricultural and Forest Meteorology, volume 8, issue 4, 2006, Pages 275~278
Google Earth enables people to easily find information linked to geographical locations. Google Earth consists of a collection of zoomable satellite images laid over a 3-D Earth model and any geographically referenced information can be uploaded to the Web and then downloaded directly into Google Earth. This can be achieved by encoding in Google's open file format, KML (Keyhole Markup Language), where it is visible as a new layer superimposed on the satellite images. We used KML to create and share fine resolution gridded temperature data projected to 3 climatological normal years between 2011-2100 to visualize the site-specific warming and the resultant earlier blooming of spring flowers over the Korean Peninsula. Gridded temperature and phonology data were initially prepared in ArcGIS GRID format and converted to image files (.png), which can be loaded as new layers on Google Earth. We used a high resolution LCD monitor with a 2,560 by 1,600 resolution driven by a dual link DVI card to facilitate visual effects during the demonstration.