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박흥재 ( Heung Jai Park ),유봉관 ( Bong Gwan Yu ),박선호 ( Sun Ho Park ),이진열 ( Jin Yeol Lee ),함유식 ( Yoo Sik Hahm ),정성욱 ( Seong Wook Jeong ),변기영 ( Ki Yeong Byeon ),김소희 ( So Hee Kim ),정임수 ( Im Su Jung ),이미림 ( Mi 한국환경과학회 2013 한국환경과학회지 Vol.22 No.11
This study was conducted to investigate the seasonal variation characteristics of phytoncide in trail of Ulsan Metropolitan. Air samples were collected from May to December 2011. They were collected using Tenax Ta tube and phytoncides were detected and quantified using a Gas Chromatograph Mass Spectrometer (GC/MSD). This study are summarized as follows; The seasonal concentrations of phytoncide are Munsu Mt. 272.3 ㎍/㎥, Samho Mt. 192.4 ㎍/㎥, Shinbul Mt. 50.9 ㎍/㎥, Sibli Bamboo forest 22.4 ㎍/㎥and Joongbu Fire Station 24.4 ㎍/㎥. In Munsu Mt., Samho Mt. and Shinbul Mt. major component ratio is α-Pinene >β-Pinene+Myrcene >Limonene >Camphene >γ-Terpinene >α-Terpinene. Bamboo forest and Joongbu fire station major component ratio is α-Pinene >Limonene >β-Pinene+Myrcene >Camphene >α-Terpinene. The variation of seasonal concentration is summer >spring >fall >winter. The phytoncide concentration of coniferous forest(Munsu Mt., Samho Mt.) is higher than broadleaf forest(Shinbul Mt.).
박흥재 ( Heung Jai Park ),유봉관 ( Bong Gwan Yu ),박선호 ( Sun Ho Park ),이진열 ( Jin Yeol Lee ),함유식 ( Yoo Sik Hahm ),정성욱 ( Seong Wook Jeong ),변기영 ( Ki Yeong Byeon ),이현희 ( Hyun Hee Lee ),최승훈 ( Seung Hoon Choi ),손 한국환경과학회 2013 한국환경과학회지 Vol.22 No.11
This study was conducted to investigate the timely characteristics of phytoncide in forest trail of Ulsan Metropolitan. Air samples were collected from July to October 2011. The phytoncide were detected and quantified using a Gas Chromatograph Mass Spectrometer(GC/MSD). This study are summarized as follows ; The highest levels of phytoncide concentration of August is higher than other months in Munsu Mt. and Samho Mt.(town mountains). The higher phytoncide emission rates found in the morning and in the evening. The concentration of phytoncide was understanded to be greatly influenced by environment change of day time.
연구논문 : 우리나라 곡물류 생산량에 기상요소의 영향에 관한 연구
장영재 ( Young Jae Chang ),이중우 ( Joong Woo Lee ),박종길 ( Jong Kil Park ),박흥재 ( Heung Jai Park ) 한국환경과학회 2015 한국환경과학회지 Vol.24 No.3
Recent climate change has led to fluctuations in agricultural production, and as a result national food supply has become an important strategic factor in economic policy. As such, in this study, panel data was collected to analyze the effects of seven meteorological elements on the production of five types of grain with error component panel data regression method following the test results of LM tests, Hausman test. The key factors affecting the production of rice were average temperature, average relative humidity and average ground surface temperature. The fluctuations in the other four grains types are not well explained by meterological elements. For other grains and beans, only average temperature and time (year) affect the production of other grains while average temperature, ground surface temperature, and time (year) influence the production of beans. For barley and millet, only average temperature positively affects the production of barley while ground surface temperature and time (year) negatively influence the production of millet. The implications of this study are as follow. First, it was confirmed that the meteorological elements have profound effects on the rice production. Second, when compared to existing studies, this study was not limited to rice but encompassed all five types of grains and went beyond other studies that were limited to temperature and rainfall to include various meteorological elements.
양산시 산업단지에서 측정한 악취물질의 농도 분포 특성 및 대기확산 모델링
송상근 ( Sang Keun Song ),손장호 ( Zang Ho Shon ),김유근 ( Yoo Keun Kim ),박흥재 ( Heung Jai Park ) 한국환경과학회 2009 한국환경과학회지 Vol.18 No.10
In this study, the environmental behavior of malodor pollutants (MPs: H2S, CH3SH, DMS, and DMDS) was investigated around areas influenced by strong anthropogenic processes based on observations and modeling study (a CALPUFF dispersion model). The MP emission concentrations were measured from 8 industrial source regions (tire plants (S1-S3), waste water disposal plant (S4), and oil refinery (S5) in an urban center area and paper mill/incineration plant (S6) and livestock feedlots (S7-S8) in Ungsang area) in Yangsan city during a fall period in 2008 (21 October 2008). Overall, the most MPs emitted from the urban center area were found to affect the malodor pollution in their downwind areas during early morning (06:00 LST) and nighttime (18:00 and 21:00 LST), compared with those in the Ungsang area. For malodor intensity, the most MPs in the urban center area (especially S1 and S2) were found to be a significant contributor, whereas CH3SH and H2S in the Ungsnag area (especially S6) were the dominant contributor. The model study showed agreement in the spatial distributions of simulated MPs with those of the observations. The largest impact of MPs in the urban center area on the malodor pollution in its residential areas occurred at S1, S2, and S3 sites during nighttime, while that of MPs in the Ungsang area occurred at S6 and S8 sites. This may be caused mainly by the high MP emissions and in part by wind conditions (prevailing northeasterly winds with low wind speeds of 2-3 m/s).