http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
허정화(Junghwa Heo),김상우(Sang-Woo Kim),윤순창(Soon-Chang Yoon),김지형(Ji-Hyoung Kim),김만해(Man-Hae Kim),김유미(Yumi Kim) 한국기상학회 2013 대기 Vol.23 No.4
In this study, we estimate the background concentration of black carbon (BC) mass concentration measured at Gosan Climate Observatory from January 2008 to December 2011 by applying six methods: (1) Mean and Median (2) Trimmed mean method deployed in Interagency Monitoring of Protected Visual Environments (IMPROVE) network program (hereafter, IMPROVE method), (3) Concentration-frequency distribution analysis method, (4) Advanced Global Atmospheric Gases Experiment (AGAGE) method (hereafter, AGAGE method), (5) Kaufman et al. (2001) method (hereafter, Kaufman method), and (6) Airmass sector analysis. The background concentration of BC mass concentrations is estimated to be about 400~900 ng m<SUP>?3</SUP>, but each method shows a large difference. The estimated background concentration, in general, is arranged in the order of: mean > IMPROVE method > median > Kaufman method > concentration-frequency distribution analysis method > AGAGE method. The background concentration estimated by the airmass sector analysis is found to be about 550 ng m<SUP>?3</SUP> which is lower than those estimated by other methods. When we apply the same analytical period (i.e., 4-day and 6-day) to both AGAGE and Kaufman methods, the estimated background concentrations are quite similar. However, further researches on the development of statistical method for estimating background concentration for various gas-phase and particulate pollutants under different environment are needed.
광음향 및 네펠로미터 방식을 이용한 에어로졸 흡수 및 산란계수 측정
김지형(Ji-Hyoung Kim),김상우(Sang-Woo Kim),허정화(Junghwa Heo),남지현(Jihyun Nam),김만해(Man-Hae Kim),유영석(Yung-Suk Yu),임한철(Han-Chul Lim),이철규(Chulkyu Lee),허복행(Bok-Haeng Heo),윤순창(Soon-Chang Yoon) 한국기상학회 2015 대기 Vol.25 No.1
Ambient measurements of aerosol light absorption (σ<SUB>a</SUB>) and scattering coefficients (σ<SUB>s</SUB>) were done at Gosan climate observatory during summer 2008 using a 3-wavelength photoacoustic soot spectrometer (PASS). PASS was deployed photoacoustic method for light absorption and integrated nephelometry for light scattering measurements. The σ<SUB>a</SUB> and σ<SUB>s</SUB> from PASS were compared with those from co-located aethalometer and nephelometer measurements. The aethalometer measurements of σ<SUB>a</SUB> correlated reasonably well with photoacoustic measurements, but the slope of the linear fitting line indicated the PASS measurement values of σa were larger by a factor of 1.53. The nephelometer measurement values of σ<SUB>s</SUB> correlated very well with PASS measurements of σ<SUB>s</SUB>, with a slope of 1.12 and a small offset. Comparing to the aethalometer measurements, the photoacoustic measurements of σ<SUB>a</SUB> didn’t exhibit a significant (i.e., the ratio between aethalometer and PASS increased) change with increasing relative humidity (RH). The ratio of σ<SUB>s</SUB> between nephelometer and PASS increased with increasing RH, especially when the RH increased beyond 80%. This apparent increase in σs with RH may be due to the contribution of hygroscopic growth of aerosols.