http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
위성자료와 다중회귀분석법을 이용한 아시아 주요도시의 포름알데하이드 칼럼농도 추정연구
최원이 ( Won Ei Choi ),홍현기 ( Hyun Kee Hong ),박준성 ( Jun Sung Park ),이한림 ( Han Lim Lee ) 대한원격탐사학회 2015 大韓遠隔探査學會誌 Vol.31 No.6
A Multiple Regression Method (MRM) is used for the first time with Ozone Monitoring Instrument (OMI) and Moderate Resolution Imaging Spectroradiometer (MODIS) data to estimate formaldehyde (HCHO) Vertical Column Density (VCD). For a 3.5-year period from January 2005 through July 2008, HCHO VCD estimation is investigated in cities over Asia in two categorized areas: (1) Major cities in Northeast Asia (Beijing, Seoul, and Tokyo), (2) Major cities in Southeast Asia (New Delhi, Dhaka, and Bangkok). In the Major cities in Northeast Asia, there are good agreements between HCHO estimated by the multiple linear regression method (HCHOMRM) and HCHO measured by OMI (HCHOOMI) (0.78 < R2 < 0.82). However, in Major cities in Southeast Asia, there were poor agreements between HCHOOMI and HCHOMRM (0.24 < R2 < 0.39). In addition, an unbiased assessment of the MRM performance using modeling and validation groups shows that the performance of the MRM based on separate modeling and validation groups is comparable to that using all the data for deriving Multiple Regression Equations(MREs). This study demonstrates that MRM can be an alternative tool for HCHO estimation in certain areas over Asia.
OMI 위성자료를 이용한 화산지역 고농도 이산화황 환경에서의 TOMS 오존과 DOAS 오존의 비교연구
최원이 ( Won Ei Choi ),홍현기 ( Hyun Kee Hong ),박준성 ( Jun Sung Park ),김대원 ( Dae Won Kim ),여재호 ( Jae Ho Yeo ),이한림 ( Han Lim Lee ) 대한원격탐사학회 2015 大韓遠隔探査學會誌 Vol.31 No.6
In this present study, we quantified the SO2 effect on O3 retrieval from the Ozone Monitoring Instrument (OMI) measurement. The difference between OMI-Total Ozone Mapping Spectrometer (TOMS) and OMI-Differential Optical Absorption Spectrometer (DOAS) total O3 is calculated in high SO2 volcanic plume on several volcanic eruptions (Anatahan, La Cumbre, Sierra Negra, and Piton) from 2005 through 2008. There is a certain correlation (R ≥ 0.5) between the difference and OMI-SO2 in volcanic plumes and the significant difference close to 100 DU. The high SO2 condition found to affect TOMS O3 retrieval significantly due to a strong SO2 absorption at the TOMS O3 retrieval wavelengths. Besides, we calculated the difference against various SO2 levels. There is the considerable difference (average = 32.9 DU; standard deviation = 13.5 DU) in the high OMI-SO2 condition (OMI-SO2 ≥ 7.0 DU). We also found that the rate of change in the difference per 1.0 DU change in middle troposphere (TRM) and upper troposphere and stratosphere (STL) SO2 columns are 3.9 DU and 4.9 DU, respectively.